Home

Service Manual ASG 100 Audio Signal Generator 070

Contents

1. l 5V 5V 1 1 ON LINE SILENCE VOICE R1 R4 S1A 10K 10K _ RECORD swo 2 gt o 6 S2A AUTO swi 4 A ee S3A gt o op LINE UP i Ei MANUAL e 4 6 2 S5A 5V oj AN 10K DOWN 5 RIGHT LEFT ae ieee 58 PAUSE AUTO FREQUENCY iba AMPLITUDE HEP 511 gt E SAVE gu O IDENTIFICATION 513 o o 514 671 1763 00 amp ABOVE cn FRONT PANEL ASG 100 Static Sensitive Devices See Maintenance Section A4 SERIAL FILTER BOARD Schematic Diagram lt 8 gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Serial Filter Board Assembly A2A1 Comp Diag Comp Diag Bd No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges ASG 100 15 c j oo NI o gt o S co po gt 4 4 470pF FL1 y 470pF J2 ND DSR 2 LI 2 470pF 7 FL3 ES 2 T 470pF J FL4 REC 2 T 470pF i FL5 2 228 li SPORE 2 I 470pF vA FL6 aput 2 T 470pF i FL7 3 C13 el 2 470pF 7 FL8 wa 470pF 2 I 470pF 7 FLO A OPE 2 470pF 7 1 C RTS CTS RI
2. 3 2 Preventive Maintenance 3 2 3 2 Visual 48 0 5 8 8 Static Sensitive Components 3 4 3 5 Troubleshooting Aids 3 5 Foldout Pages 2 2 2 3 5 Parts 4 3 5 Major Assembly Interconnection hh eee 3 6 General Troubleshooting 3 6 Power On 2 2 2 2 3 7 Corrective 24444 2 3 7 Obtaining Replacement 8 hh 3 7 Removal and Replacement 3 8 Cabinet Removal and Replacement 3 8 Front Panel Removal and 3 8 Main Board Removal and
3. 2 3 4 Self Diagnostic Tests 4 2 3 7 Test Equipment Required for Verification and 4 1 Amplitude Accuracy Check Points 4 3 Test Frequencies for Amplitude 4 4 Test Frequencies for THD 4 5 Pin Connections for Remote A 2 Serial Communication Parameters 4 List of ASG 100 Commands Arguments and Queries A 7 Special Queries 10 Control hh rr 10 Test Name Arguments to Remote AUTO A 14 ASG 100 Service Manual vii OPERATOR S SAFETY SUMMARY The general safety information in this part of the summary is for both operating and servicing personnel Specific warnings and cautions will be found throughout the manual where they apply but may not appear in this summary Terms In This Manual statements identify conditions or practices that could result in damage to the equipment or other property statements identify conditions or practices that could result in personal injury or lo
4. 1 4 4 1 2 Remote 1 2 Specifications hh hm hh hehe hh herr 1 3 Electrical Characteristics 1 3 Environmental 5 ertt 1 6 Mechanical Characteristics eese 1 6 Power Cord Options 4 4 4 1 7 Section 2 Operation and Setup Mains 2 2 Freedom of Operation 2 2 Front Panel 2 2 2 Functions 2 2 ON 2 4 2 3 2 3 2 3 RECORD PRESS SILENCE VOICE 2 3 1 4 4 2 2 4 Auto Test Level 4 4 2 4 Sweep Test Level
5. 5 9 AGC and Output Amplifier 4229 Sem td HOG WS b Ried 5 9 Power Distribution Diagram 6 5 10 Front Panel diagram 7 5 10 Serial Filter Board Diagram 8 5 10 Power Supply No diagram 5 10 Section 6 Replaceable Electrical Parts List Section 7 Diagrams Section 8 Replaceable Mechanical Parts List Appendix A Remote Operation Remote Control From a Terminal A 1 Limited Local Remote Control A 1 Installati tix ober dur dettes sca XE qu frt aos dude dar A 1 Connect a Properly Configured Communications A 1 ee 2 BSD 4 Set Serial Communication A 4 Setting Baud Rate acs baie RP IH RSet A 4 iv ASG 100 Service Manual Remote Operation 0 2 6 Remote Commands 7 Command 10
6. 5 2 10 OUTPUT 2775mV rms 2 11 Display Window 2 2 11 2 2 11 REAR PANEL POWER SWITCH AND SIGNAL 5 2 12 Power Switch ee yh rrt tn 2 12 Audio Signal 2 2 12 Remote Connector 2 12 Internal Settings and Setup Editing 2 13 Enabling and Disabling Signal 2 13 Editing Signal 2 15 Saving Signal Parameters 2 15 External Edit 2 2 16 Front Panel and Remote Control 2 17 Setting the Output 2 17 Section 3 Maintenance Lithium Battery 0 0 ee ne ne nee ee eee tee 3 1 Battery 12 2 3 1 Battery Emergency and First Aid 3 1
7. 671 2106 00 REMOTE SERIAL FILTER BOARD FIG 1 EXPLODED VIEW ASG 100 Section 8 Replaceable Mechanical Parts This section contains a list of the components that are replaceable for the ASG 100 Use this list to identify and order replacement parts There is a separate Replaceable Mechanical Parts list for each instrument Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benifit of the latest circuit improvements Therefore when ordering parts it is important to include the following information in your order Part number Instrument type or model number Instrument serial number m Instrument modification number if applicable If a part you have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any is located at the rear of this manual Using the Replaceable Mechanical Parts List The tabular information in the Replaceable Mechanical Parts list is arranged for quick retrieval Understanding the structure and features of the list will help you find all of the information you need for ordering replaceable parts Cro
8. 2 12 Remove side panel door to access DIP switch 2 13 DIP switch settings for 2 14 Output impedance resistor network 2 18 Effects of a changing load resistance on the dBm output of the ASG 100 2 19 Effects of matching load and source impedances in the ASG 100 2 20 Cabling to IBM or Compatibles and the VM700A A 3 Cabling to IBM AT 386 and Compatibles A 3 Setting baud rate during power A 5 Help screen of remote commands A 11 ASG 100 Service Manual 1 1 1 2 1 3 1 4 1 5 2 1 3 1 3 2 3 3 4 1 4 2 4 3 4 4 1 2 3 4 5 6 List of Tables Page Electrical RR eee eee 1 3 ASG 100 ees 1 5 Environmental Characteristics 1 6 Physical hh 1 6 Voltage Fuse and Power Cord Data 1 7 Dip Switch Functions ele meat 2 16 Emergency Procedures for Contact with Lithium Battery Contents 3 2 Static
9. Verification and Adjustment ASG 100 Service Manual 2 Adjust Gain Test Equipment Required Distortion Analyzer AA5001 RMS Meter Power Supply TM500 Audio Signal Cables XLR Male to banana connector Connect the ASG 100 Audio Out Right XLR connector to the rms meter via an XLR to banana connector adapter cable Pin 1 is ground pin 2 is the toutput and pin is the output of the ASG 100 Set the rms meter to measure rms voltage unterminated Use either Auto Range or an appropriate range setting to measure the expected rms voltage SET ASG 100 MANUAL R Tone AMPLITUDE 14 0 dBu FREQUENCY 1000 Hz ON LINE On line LED lit and OUTPUT gt 775 mV rms LED flashes Adjust the Right Channel Gain potentiometer R24 for an amplitude of 3 89 volts Press ON LINE to turn off the test signal ON LINE LED off Disconnect the XLR connector from the Audio Out Right connector and move it to the Audio Out Left connector Set the ASG 100 MANUAL test signal to L Tone and press ON LINE to turn on the test signal Adjust the Left Channel Gain potentiometer R26 for an amplitude of 3 89 volts Press ON LINE to turn off the test signal ON LINE LED off Disconnect the test cable from the rms meter 3 Adjust Distortion a Connect the XLR to banana connector test cable from the Audio Out Left connector to the distortion analyzer balanced inputs In the adapter cable pin 1 green is ground pin 2 bl
10. l level Sends polarity to respective channel s r l 11 lt 1 21314 gt 1 1evel Sends multi tone to respective channel s Where test is an auto sequence argument Type auto help for list Example auto tek 91 will generate the tek 91 sequence freq is the frequency in Hz Example tone f 440 sends a tone 440Hz default level level is the level in dBu The level must be entered to the nearest tenth of dBu Example 1mtone 1 2 3 sends left channel multi tone at 2 3dBu ASCII character from to Figure A 4 Help screen of remote commands Queries There are several remote queries available They are associated with the test signal commands The form of the query is tone and the return is the present setting for the Manual Tone frequency and the Manual Tone Level Similar information is returned when the question mark is used to make a query of one of the other test signal commands The query associated with the commands of voice voit lu and lineup that have no arguments return the current line up signal level and frequency A query of Auto returns the currently selected test sequence the 4 character id of the ASG 100 queried and the Test Level and Sweep Level settings associated with the auto test sequences Unit identification There is an id command and an id query The id command sends a four character identification code to
11. LLL tT ty eR ET Ty LLL NL LL LLL LLL LL eV ET TT Tt Et aw ERP TEE 11111 wf LE ALT LL LL a NHH 7808 an we EE EE Ey tT tt 1000 2000 3000 4000 50052 6009 7000 8000 90052 10009 11000 12000 Difference between displayed dBu and output dBm as a function of source resistance and load resistance changes when matching source and load NOTE Points of interest At 150 dBu and dBm match At 300 Q subract dB from the reading and at 600 subtract 6 dB The source resistance should never be made greater than the load resistance Figure 2 9 Effects of matching load and source impedances in the ASG 100 Section 3 MAINTENANCE This section contains instructions for preventive maintenance general troubleshooting and corrective maintenance If the instrument does not function properly troubleshooting and corrective measures should be taken immediately to circumvent additional problems LITHIUM BATTERY Battery Disposal The ASG100 stores default values when powered off by means of its lithium battery located on the circuit board immediately behind the headphones jack If you need to replace the battery observe the warnings and instructions in this section WARNING Improper handling may cause fire explosion or severe burns To avoid personal injury observe proper procedures for the handling of lithium batteries Do not recharge crush disassemble hear the b
12. EXTRST RXD 5 TXD 3 4 SELO 5 SELT 6 LATCH 7 TEST SCK 8 ONLY SRD 9 1D 40 2 DSPRST 11 12 43256 12LL AO H 1 Di H A2 13 3 A4 16 A5 Ds 12 A6 18 D7 BATTERY y BACKUP 20 0K A10 PREAMP 11 12 066 C70 Po 14 SCK 9 PCMCLK WE 28 U40D dce voc 8 74LS04 OE Hp BAT1 BAT2 GND veco VECO STD BATT U62 2 DIGITAL SIGNAL PROCESSOR FOR TEST AND FUTURE EXPANSION ASG 100 Schematic Diagram lt 3 gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Main Board Assembly A2 Partial Assembly A2 also shown on Dia grams 1 2 4 5 and 6 Comp Diag Diag Bd No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges 5V U66A RP rica U1 39 STD 2 5 R J2 040 8 3 3 BIT lt gt 067 2 R66 2 2K 7418164 5V LEFT D A CONVERTER 7418164 7418164 015 AD1860N K 5VA 3 16 5VA SCK PCMCLK 5VA O 8 D 01 32 7 4 6 51 15 13 CH1 R14 MSBADJ 475K SJ RF R28 100 DATA FORMATTER SYNCHRONIZER wsBap 29 R16 200K 5VA a
13. 3 8 Power Supply Removal and 3 9 Serial Connector EMI Board Removal and Replacement 3 10 ASG 100 Service Manual Section 4 Verification Adjustment Verilication Procedure 444544446 ane jase d ao des 4 2 Preparation eee ees Sos qd dese eee a did cada A edis 4 2 Proced fes s 2 DIE aine ma xv 4 2 Power Up Check PIRA edd P ad d eee 4 2 2 Check Frequency Accuracy 40 1 4 2 3 Check Amplitude Accuracy 0 2 dB at 1000 Hz 4 3 4 Check Amplitude Flatness 0 05 0 2 dB 10 Hz to 20 2 4 3 5 Check Channel to Channel Level Difference x 0 2 dB at 14 dBu 4 4 6 Check Total Harmonic Distortion Noise lt 0 015 20 Hz to 19 kHz lt 0 056 gt 19 KHZ to 20 2 4 5 7 Check Signal to Noise Ratio gt 80 dB at 0 dBu at 1 4 6 8 Check Channel to Channel Phase Difference lt 1 10 Hz to 20 kHz 4 6 9 Check Loop Throtigh 2 6 AI EID RSEN Ie as 4 7 10 Check SAVE Operation 4 7 11 Check RECORD and Headphones Operation 4 1 12 Check Audio
14. 5V U66A 74LS74 4 U16 7415164 U1 39 STD 2 p qL5 J2 040 8 3 3 BIT 67 2 L DED 866 2 2 6 7415164 5V 74LS164 74LS164 015 AD1860N K 5VA 3 SCK PCMCLK P qb 8 01 32 7 6 15 R14 MSBADJ 475K FAT sy VOUT RF R28 100 DATA FORMATTER SYNCHRONIZER wsBap 29 R16 200K 5VA PCMLE 012 21 15 475 R27 100K 57 CU MSB ADJ R17 200K 5VA l ANALOG GROUND A DIGITAL GROUND q I ASG 100 U14 AD1860N K VL LGND AGND VL DATA LE TRIM MSBADJ 11 SJ RF RIGHT D A CONVERTER LEFT D A CONVERTER 13 1 C95 100pF R25 10 0 R26 2K GAIN ADJ LEFT LOW PASS FILTER R20 R19 2 00K 2 00K FL2 LOW PASS FILTER UJ 2 C117 33pF 1 15V 100 4 E 10 4 24 lt U21 0 1uF T 6 AD841 O 15V C116 33pF 15V O R160 11 11 3 2 10 C34 0 1uF U20 6 0841 Q 15V pe 15V O R23 10 0 R24 2K GAIN ADJ LJ U69 78L12A 070 79112 R13 20 0K gt R22 R21 2 00 2 00 lt 7 FL3 LOW PASS FILTER SHB 2 6 3 IN OUT 99 7 1 U13A l4 15V GND R18 C31 GND 20 0K 1353 4 gt A O V 15V A T 15V GND A A RIGHT LOW PASS FILTER NOTE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RA
15. TERMS W1 174 2497 00 ASSY SBELEC 2 18 AWG 3 25 L 80009 174 2497 00 CONNECTED FROM A3J1 5100 W7 174 2451 00 ASSY RF COAXIAL RFD 50 OHM 0 083 DIA 11 0 80009 174 2451 00 L 1X3 0 1 CTR RCPT BOTH ENDS CONNECTED FROM A1J7 TO A2J2 W200 174 2494 00 010100 010409 ASSY SP ELEC PHONE JACK CABLE 80009 174 2494 00 W200 174 2552 00 010410 ASSY SP ELEC 3 26 AWG 3 1 L RBN 80009 174 2552 00 ASG 100 6 19 Replaceable Electrical Parts 6 20 ASG 100 ASG 100 SECTION 7 DIAGRAMS CIRCUIT BOARD ILLUSTRATIONS Symbols Graphic symbols and class designation letters are based on ANSI Standard Y32 2 1975 Logic symbology is based on ANSI Y32 14 1973 in terms of positive logic Logic symbols depict the logic function performed and may differ from the manufacturer s data Both overline and parenthesis indicate a low asserting state ID CONTROL or ID CONTROL Abbreviations are based on ANSI Y1 1 1972 Example Other ANSI standards that are used in the preparation of diagrams by Tektronix Inc are 14 15 1966 Drafting Practices Y14 2 1973 Line Conventions and Lettering 10 5 1968 Letter Symbols for Quantities Used Electrical Science and Electrical Engineering American National Standard Institute 1430 Broadway New York New York 10018 Component Values Electrical components shown on the diagrams are in the following units unless noted otherwise Capacitors
16. SSE D U14 AD1860N K VL 16 O 5VA LGND AGND 12 gt VL O 5VA DATA LE U12 21 15 13 l ANALOG GROUND A DIGITAL GROUND q I ASG 100 TRIM R15 475K MSBADJ SJ RF R27 100K C UJ MSB ADJ R17 200K 5VA RIGHT D A CONVERTER 1 21K R26 o 117 GAIN ADJ 33pF R23 1 21K LOW PASS FILTER 5 R24 e 116 GAIN ADJ 33pF A A u 00 e LJ ED U69 78L12A 15V 15V U70 79L12 LEFT LOW PASS FILTER R20 R19 665 2 00K 12 FL3 LOW PASS FILTER gt 15V 15V LF353 Gm M R22 R21 665 2 00K OUT 6 1 U13A 4 ex OND LF353 E RA RIGHT LOW PASS FILTER SEE PARTS LIST FOR EARLIER VALUES NOTE AND SERIAL NUMBER RANGES P O A2 MAIN BOARD DIGITAL TO ANALOG CONVERTER 671 1758 09 amp ABOVE ASG 100 Schematic Diagram lt 3a gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Main Board Assembly A2 Partial Assembly A2 also shown on Dia grams 1 2 4 5 and 6 Comp Diag Comp Diag Bd No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges
17. DSR 22 RXD 17 CTS 11 RI 10 414 15 6 Citi T 4 7uF 1 DDR7 3 U40F ADDR8 25 12 ADDR9 24 NVRCE ADDR10 21 74LS04 ADDR11 23 ADDR12 2 ADDR13 26 ADDR14 1 U62 051210 5_ 9 RD 20 671 1758 01 BATT 2 BAT1 amp BELOW TS 27 71 BAT 3 4 1 TOL 5V 0 2 VCCI 1 GND VCCO SS SWOEN RESET R191 U63 27 512 ADDRO 10 ADDR1 9 ADDR2 8 ADDR3 7 ADDR4 6 SS pu OSS ADDRS 5 a 4 ADDR 3 ADDR8 25 RS232 PORT S ADDR10 21 ADDR11 23 RTS ADDR12 2 ADDR13 26 ADDR14 27 J25 ADDR 5 1 1 2 E ROMCE 20 2 SERIAL 20 5 FILTER 6 BOARD 7 5 9 o 1 9 10 v E T EPROM DCD 74LS244 DATAO 1 8 316 16 DATA2 14 U52 7415244 051 CONTROL PROCESSOR J1 FRONT PANEL BOARD W125 K5 T 6710 8210 K2 TU R167 TL 49212 1019 0619 WI Static Sensitive Devices See Maintenance Section 074 6 7794 08 6 4 789 84 168 04 05 08 09 012 013 016 017 R37 Q2 CR4 CRO 03 R38 R45 R46 R41 Q6 CR6 CR7 Q7 R42 R77 Q10 CR8 CR9 011 78 85 R86 R81 Q14 CR10 CRT 015 R82 R173 019 R176 C96 C35 U25 C36 R68 R67 U25 R107 R108 098
18. Operation and Setup ASG 100 Service Manual REAR PANEL POWER SWITCH AND SIGNAL CONNECTORS LINE VOLTAGE OUTPUT 2 AUDIO OUT LEFT AUDIO OUT RIGHT AUDIO IN LEFT AUDIO IN RIGHT 100 240V lt 6 OHMS 7 E 1 BOVA 9 amp 50 60 Hz POWER REMOTE Figure 2 4 ASG 100 Rear Panel connectors Power Switch The ASG 100 power switch is immediately to the right of the power plug receptacle on the back panel see Figure 2 4 In the off position the top of the switch which has a red engraved in it 15 out When the ASG 100 is connected to a power source power it up by pressing the top of the switch Power it off by pressing the bottom of the switch NOTE When power is turned on the selections for the settings will be determined by the stored defaults that are recalled However the ASG 100 will be off line and any signal applied will be automatically connected to the output via the loop through circuitry Audio Signal Connectors The input and output connectors for the AUDIO IN and AUDIO OUT connectors for the left and right channels are loop through connectors When the ASG 100 is off line the signals applied to the input connectors are connected directly to the output connectors via the internal loop through circuitry of the ASG 100 A small sample of the incoming program signal is fed to the headphones output connector on the front panel so the program audio may be monitored Remote Connec
19. 0 15 010 7415273 CTRL7 102 6 97 99 11 2 CONTROL 105 A7 106 REGISTER 9 108 109 a oo o1 120 10 11 12 1 14 15 OE VPP U3 270512 1 2 4 5 A8 A9 A10 A11 A12 A13 A14 A15 CE OE VPP OOO U12 PAL22V10 25 H CLK 23 CODEC 2 18 PCMLE U4 270512 1 2 247 P16 CERAM 15 4 1 1 1 1 1 4 5 9 10 11 12 1 14 15 Q OE VPP DO D1 D2 D3 D4 D5 D6 D7 DO D1 D2 D3 D4 D5 D6 D7 11 13 15 16 17 18 19 11 12 13 15 16 17 18 19 D8 D9 D10 D11 D12 D13 D14 D15 D16 D17 D18 D19 D20 D21 D22 D23 2 3 R1 4 7K 5V 1 2 R2 4 7K 5V 1 R3 SS SS SS Ss SSS I J31B 1 2 2 Al 3 A2 4 5 4 6 5 7 8 7 9 gt 8 10 9 11 10 12 11 13 5 12 14 13 15 14 16 15 17 18 5 5 19 DS 20 X Y 21 DRD 22 DWR 23 CEEXTO 24 CEEXT1 25 CEEXT2 26 27 1 28 2 5V 29 30 31 2 1 3 5 J31A 1 DO 1 2 2 D1 3 D2 477 5 D4 6 D5 7 D6 8 D7 9
20. T amp R SM BODY RES FXD MET FILM 3 32K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 1K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 316 OHM 196 0 2W TCZ TO RES FXD MET FILM 2 21K 1 0 2 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 2 21K 1 0 2 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 10K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 15 4K OHM 1 0 125W TC TO RES FXD MET FILM 1K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 9 09K OHM 196 0 2W TC TO RES FXD FILM 9 09K OHM 196 0 2W TC TO RES FXD MET FILM 10K OHM 196 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 13 3K OHM 196 0 2W TC TO RES NTWK FXD FI 10K OHM 2096 9 RES RES FXD FILM 1M OHM 196 0 2W TC TO RES FXD FILM 280 OHM 1 0 125W TC T0 RES FXD FILM 715 OHM 1 0 2W TC T0 RES FXD MET FILM 1K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 4 75K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY Mfr Code 80009 57668 91637 57668 57668 57668 57668 57668 80009 91637 80009 57668 80009 80009 80009 80009 57668 91637 57668 80009 57668 57668 80009 80009 57668 80009 80009 80009 80009 80009 80009 07716 80009 57668 80009 Mfr Part Number 322 3289 00 CRB20 FXE 100K CCF50 2 G1500F CRB20 FXE 20K0 CRB20 FXE 20 0 CRB20 FXE 20 0 CRB20 FXE 100E CRB20 FXE 20 0 322 3265 00
21. 0 100 AXIAL T amp R A2C114 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C115 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C116 281 0819 00 CAP FXD CER MLC 33 PF 5 50V 0 100 X 04222 SA102A330JAA 0 170 AXIAL MI A2C117 281 0819 00 CAP FXD CER MLC 33 PF 596 50V 0 100 X 04222 SA102A330JAA 0 170 AXIAL MI 2 118 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C119 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C120 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 5 205 104 0 100 AXIAL T amp R A2C121 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 5 205 104 0 100 AXIAL T amp R A2C124 283 0067 00 DI 0 001UF 1096 200V 51406 2 125 283 0067 00 CAPFXD CER DI 0 001 UF 10 200V 51406 2 126 283 0067 00 671 1758 00 671 1758 0 3 CAPFXD CER DI 0 001UF 10 200V 51406 A2C127 283 0067 00 671 1758 00 671 1758 03 Dl 0 001UF 10 200V 51406 A2C128 283 0067 00 671 1758 00 671 1758 03 DI 0 001UF 10 200V 51406 A2C129 283 0067 00 671 1758 00 671 1758 03 DI 0 001UF 1096 200V 51406 A2C130 283 0067 00 671 1758 00 671 1758 03 DI 0 001UF 10 200V 51406 2 131 283 0067 00 671 1758 00 671 1758 03 DI
22. 2 4 2 5 Alternating VOICE and 2 5 ee heh hh n 2 5 Tone 4 2 6 Polarity Tests 2 6 Multitone Tests 2 7 Manual Test 2 7 Manual Test Frequency 2 7 2 7 IDENTIFICATION 2 7 2 8 ASG 100 Service Manual Arrow Buttons 2 a 2 8 ff Up Arrow 0 Down Arrow 2 9 Left Arrow gt Right Arrow 2 9 PAUSE 2 9 2 10 Status Feedback 24 25 2 10 2 2 10 Power On
23. C96 C35 023 056 R68 R67 025 R107 R108 C98 057 029 C38 R82 R173 R186 R187 C141 018 C97 R29 R30 R31 R32 R33 J33 R34 R181 R182 C143 C99 R69 R70 R71 R72 R73 R74 R183 R184 TP2 Col ee 14 41 022 R35 R36 R180 U28 R75 R76 R185 039 YAR C142 Go U7 C5 6018 6119 R26 Z 29 Lita 7914 1019 R14 050 0019 8114 C45 6119 AAR FL2 79 9914 049 FL 54 9214 SUA 5914 618 06d R27 C53 155 R17 C26 159 0121 OLN la C61 027 2 MAIN BOARD 671 1758 04 amp UP Bd Loc Comp No Diag Loc The schematic dia gram has an alpha numeric grid to as sist in locating parts within that diagram BLOCK DIAGRAM Comp ASG 100 7 T 051 C108 59 U4 123 5 ed R2 R3 066 L1 e 040 C4 U8 C6 C93 VERG R6 021 NES R25 95 13 R161 U15 U19 7 EE U20 ele C86 R23 C94 R160 14 29 25 12 017 Co Cu 18 09 919 510 6 2 9 C8 U3 12 RI gt R159 J25 11 Uto U48 R158 R177 R178 J28 51 C85 6 14 gcr 20 FL13 FL12 1518 132 C114 BTI U6 5 4 2 012 89 eje U64 Ui gt 063 C88 R5 067 C115 C1172 C110 C111 6 049 054 i ie R189 CEST T z U47 050
24. CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1 UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD MICA DI 98PF 5 500V CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD MICA DI 33PF 2 500V 0 370 X 0 340 RDL CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R Mfr Code 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 55680 55680 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 80009 04222 00853 04222 Mfr Part Number SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA UVX1H100MAA UVX1H100MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA S
25. CAP FXD ELCTLT 10UF 20 50V CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD ALUM 47UF 100 20 16V 0 681 X 0 414 RDL CAP FXD ELCTLT 100UF 2096 25 V DC CAP FXD CER MLOC 0 1UF 2096 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD ALUM 1UF 2096 50V 5 X 11 MM RDL CAP FXD CER Dl 100PF 596 100V CAP FXD ELCTLT 1UF 75 10 50V CAPFXD ELCTLT 1UF 75 10 50V CAP FXD ELCTLT 10UF 20 50VDC CAPFXD ELCTLT 1UF 75 10 50V CAP FXD ELCTLT 1UF 75 10 50V CAP FXD ELCTLT 10UF 20 50VDC CAP FXD CER DI 0 1UF 10 100V CAP FXD ELCTLT 10UF 20 50VDC CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD ELCTLT 1UF 75 10 50V CAP FXD CER MLC 33 PF 5 50V 0 100 X 0 170 AXIAL MI CAPFXD CER MLC 33 PF 596 50V 0 100 X 0 170 AXIAL MI CAPFXD ELCTLT 100UF 50 20 50WVDC CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC O 1UF 2096 50V X7 R 0 265 X 0 100 AXIAL T amp R CAP FXD CER
26. Help Commands A 10 Queries 11 Unit 11 Special Queries 12 Restoring Defaults 12 Flow 2 12 Remote Command Syntax nn A 12 auto 1 13 Aborting an Auto Sequence A 13 r tone f frequency level 14 lpolr 15 rl lt 1121314 gt 4 15 ASG 100 Service Manual v Figure 1 1 2 1 2 2 2 3 2 4 2 5 2 6 2 7 2 8 2 9 1 2 8 List of Illustrations Page Typical 1 kHz THD Noise versus Output 1 4 ASG 100 Menu 4 2 2 1 ASG 100 Front Panel controls 2 2 Manual test signal selection using arrow keys 2 6 ASG 100 Rear Panel connectors
27. amp Outlina aAA c m 0 7 Modified Component Depicted in Grey or Internal Screwdriver 5V tU LINE SYNC GEN With Grey Outline See Parts List Adjustment 1 SETUP 5 71 Le oe om m R40 10 ag Etched Circuit Board 19 10K 20 V BY Strap or Link Outlined in Black 50 oo 1 Tte oa Identifies Refer to Waveform 5 1 5 o a J100 Panel contr ols d 1112 74123 E Indicators 12 SYNG 5V 2 2 5 Coaxial Connectors Test Voltage R52 2 R61 Oe se Male B EE TP46 R50 LIAK Heat Sink O 49 9K 2 750 24 plug No 1 Selected Value see Parts List b game and Maintenance Section for SIE aN R66 i External Screwdriver Selection Criteria CR54 Y Q58 E R84 4 Adjustment 2 20K BAL Board Name te R56 Q59 1 3 EFE SEL Assembly Number _ MEE d 15 V cocos Plug to 8oard P O Part of Circuit Board Ttt ttt L mum m mmm TM Shielding Tektronix Part No for circuit boards Decoupled or Filtered Voltage SYNC GENERATOR lt gt lt Schematic and Number 7 1 lt 8 gt SERIAL REMOTE REAR PANEL FILTER lt 7 gt FRONT PANEL
28. 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL5 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL6 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL7 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL8 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL9 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4J1 174 2353 00 ASSY SP ELEC 10 28 AWG 9 25 L 80009 174 2353 00 CONNECTED 1 25 A4J2 131 3926 00 CONN DSUB 80009 131 3926 00 135 283 0067 00 010100 010409 CAP FXD CER D 0 001UF 1096 200V 51406 C135 283 0067 00 B040000 CAP FXD CER D1 0 001UF 1096 200V 51046 283 0067 00 C136 283 0067 00 B010100 B010409 CAP FXD CER D1 0 001UF 1096 200V 51046 283 0067 00 C136 283 0067 00 B040000 CAP FXD CER D1 0 001UF 1096 200V 51046 283 0067 00 C200 283 0067 00 B010410 CAP FXD CER D1 0 001UF 10 200V 51046 283 0067 00 E200 276 0647 00 B010410 B039999 CORE EM TOROID FERRITE 78488 57 0126 6 18 ASG 100 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued Name amp Description Code Number FL100 119 1536 00 FILTER RFI 3A 250VAC 50 60HZ 54583 ZUB2203 00 J200 131 5233 00 CONN JACK PHONE 80009 131 5233 00 ATTACHED PARTS 210 0201 00 TERM LUG 0 12 ID LOCKING BRZ TIN PL 86928 A373 157 2 END ATTACHED PARTS J230 174 2338 00 CA ASSY SP ELEC 80009 174 2338 00 CONNECTED FROM A1J23 TO 2 5100 260 2553 00 SW RKR DPDT 6A 125VAC POWER W QUICK CON 80009 260 2553 00
29. 02 281 0775 02 281 0775 02 290 0974 00 290 0974 00 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 283 0599 00 281 0775 02 283 0642 00 281 0775 02 Serial Assembly Number Discontinued amp Description CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1 UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V A7R 0 265 X 0 100 AXIAL CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD ELCTLT 10UF 20 50VDC CAP FXD ELCTLT 10UF 20 50VDC CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R
30. 0E DIP28 6 ASG 100 6 15 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number PartNumber Effective Discontinued Name amp Description Code Number 207 156 0991 00 IC LIN BIPO 80009 156 0991 00 LAR VR POS 5 0V 100MA 596 MC78L05ACP TO 92 A2U8 156 1150 00 IC LIN BIPO 80009 156 1150 00 LAR VR NEG 5 0V 100MA 496 MC79LOBACP TO 92 A2U9 156 4044 00 IC MISC CMOS TELECOM ULAW PCM CODEC 80009 156 4044 00 AND FILTER TCM29C 18N DIP106 3 A2U10 156 0865 02 IC DGTL LSTTL FLIP FLOP 74LS273 DIP20 3 TUBE 80009 156 0865 02 A2U11 156 0865 02 IC DGTL LSTTL FLIP FLOP 74LS273 DIP20 3 TUBE 80009 156 0865 02 2012 160739300 MICROCKT DGTL STTL PLD 10NS 180MA 22V 10 80009 160 7393 00 MOUNTING PARTS 136 0925 00 SKT DIP 91506 224 AG30D END MOUNTING PARTS A2U13 156 1191 00 IC LIN BIFET OP AMP DUAL TLO72CN 80009 156 1191 00 LF353N DIP08 3 A2U14 156 4040 00 IC CONV 80009 156 4040 00 MOUNTING PARTS 136 0729 00 SKT DIP PCB FEM STR 2 X 8 16 POS 0 1 X 0 3 09922 DILB16P 108T CTR 0 175 0 130 TAIL BECU TIN END MOUNTING PARTS A2U15 156 4040 00 IC CONV 80009 156 4040 00 MOUNTING PARTS 136 0729 00 SKT DIP PCB FEM STR 2 X 8 16 POS 0 1 X 0 3 09922 DILB16P 108T CTR 0 175 H X 0 130 TAIL BECU TIN END MOUNTING PARTS A2U16 156 0651 02 IC DGTL LSTTL SHIFT 80009 156 0651 02 RGSTR 74LS164 DIP14 3 TUBE A2U17 156 0651 02 DGTL LSTTL SHIFT 80009 156 0651 02 RGSTR 74LS164 DIP14 3 TUBE A2U18 156 0651 02 IC DGT
31. 15V 0 5A A4 671 2106 00 CIRCUIT BD ASSY SERIAL FILTER 80009 67 1 2106 00 4 1 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C320C471J5G5CA 4 2 283 0197 00 DI 470PF 5 50V 05397 C320C471J5G5CA 283 0197 00 CAP FXD CER 470 5 50 05397 C3200471J5G5CA A4C4 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C5 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C6 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 0320047 1J5G5CA A4C7 283 0197 00 CAP FXD CER DI 470PF 596 50V 05397 C320C471J5G5CA A4C8 283 0197 00 CAP FXD CER DI 470PF 596 50V 05397 C3200471J5G5CA 4 9 283 0197 00 CAP FXD CER DI 470PF 596 50V 05397 C3200471J5G5CA A4C10 283 0197 00 CAP FXD CER 01 470 5 50 05397 C3200471J5G5CA A4C11 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C12 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C320C471J5G5CA A4C13 283 0197 00 CAP FXD CER DI 470PF 596 50V 05397 C320C471J5G5CA A4C14 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C15 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C16 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C17 283 0197 00 CAP FXD CER DI 470PF 5 50V 05397 C3200471J5G5CA A4C18 283 0197 00 CAP FXD CER DI 470PF 596 50V 05397 C3200471J5G5CA A4FL1 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL2 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL3 119 3580 00 FILTER EMI TK2058 ZJSR 5101 102TA A4FL4 119 3580
32. 2 P17 AD7 PO 7 gto 045 WR 22 ADDR8 PAL22V10 HPCHEN 17 lt P3 0 RXD ADDRO IN ADDR 1 Hen HPFLEN 18 PS 1 TXD ADDR10 ADDR 227142 SONTO ADDR11 I ADDR10 3 E b23 SWOEN 3 INTT ADDRI2 IK ADDATI 4 222 SWIEN P3 4 T0 ADDR13 I 1 5 821 HPCHEN i 1 R158 EE RDDRIS 04 SSS BE E 1 9 1 00 P3 7 RD ADDRIS 5 ie NE UIS LEDS 25 2 INTO EANPP ALE PROG PEEN 19 107 7 DSPRST S We 26 RESET PSEN 83 10 10 D1 INVRCE EWA eui 111 09 SW WR 13 14 DSPWR XTAL1 vcc 112 1010 29 XTAL2 GND 51 11 059 2 BUE 32 PANEL SW J26 W8 35 INTERNAL INTERFACE SWS 56 EPROM 520 5 W10 37 C71 R149 C72 WT 38 R179 d 1 7 dod E SW13 40 RESET 6 oc 5 4i 3 42 f Exc 11 DATA4 45 DATAS 46 DATAG 47 48 49 5 4 5V 5V J31A 31 U40B U50 3 4 B ATT RY 43256 1211 7415273 sut EXTRST 741504 ADDAI 9 IN DATA 4 J29 N ADDR2 8 lt E 6 10 2 E 13 C115 4 17 18 ANALOG GROUND SEE PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES DIGITAL GROUND Pio A2 MAIN BOARD ASG 100 RTS 24 TXD 23 DTR 16 om
33. 2000 Hz and that the Tone level is 4 0 dBu Turn off the ASG 100 and disconnect the serial communications cable Restore any settings and dipswitch positions needed to return the ASG 100 to its needed state for operation and replace the access plate over the dipswitch 4 9 Verification and Adjustment ASG 100 Service Manual ADJUSTMENT PROCEDURE Preparation a Disconnect the power cord from the ASG 100 and remove the top cover of the instrument Set the switch sections of S1 as follows PROGO section 1 up stores factory defaults on power up PROG1 through PROG3 sections 2 3 4 up enables editing and saving section 5 up factory setting PROG6 section 6 down factory setting PROG6 section 7 up enables remote control PROG7 section 8 up enables front panel MODA and MODB sections 9 10 up factory settings c Connect the power cord to the ASG 100 and turn on the power switch Check that DS1 near the power supply connector comes on d Set PROGO of S1 to the down position This enable the user settable defaults With the PROGO up the factory defaults are restored at each power on Procedures 1 Check Supply Voltages Test Equipment Required Power Supply TM500 Digital Multimeter DM504A a Use the digital multimeter to check the power supply voltages at J23 Pins 2 and 3 4 90 V to 5 10 V 5299 b Check the following supplemental regulated voltages at the points indicated
34. 2496 00 196 1213 00 211 0244 00 SJ 5018 GRAY 200 3869 00 200 3869 01 200 3869 02 ASG 100 Replaceable Mechanical Parts Fig amp index Tektronix Serial Number Mfr No Part No Effective Dscont Qty 12345 Name amp Description Code Mfr Part No STANDARD ACCESSORIES 28 161 0066 00 1 ASSY PWR 3 18AWG 98 L SVT GREY BLK 60 DEG C IEC 80009 161 0066 00 BME X RCPT 10A 125V STANDARD ONLY 070 8152 0X 1 MANUAL TECH INSTR ASG100 80009 070 8152 0 070 8546 0 1 MANUAL TECH SERVICE ASG100 80009 070 8546 0 OPTIONAL ACCESSORIES 29 161 0066 09 1 ASSY PWR 3 0 75MM SQ 220V 99 0 L 80009 161 0066 09 EUROPEAN OPTION 1 ONLY 30 161 0066 19 1 ASSY PWR 1373 24230 UNITED KINGDOM OPTION 2 ONLY 31 161 0066 11 1 ASSY PWR 3 0 75MM 240V 96 0 L 80009 161 0066 11 AUSTRALIAN OPTION ONLY ASG 100 8 5 Replaceable Mechanical Parts 8 6 5 100 Appendix REMOTE OPERATION REMOTE CONTROL FROM A TERMINAL You can control the ASG 100 from a terminal a computer running terminal emulation software or a VM700A Video Measurement Set via the RS 232C serial interface Remote control via a modem is also possible using the RS 232C serial port of the ASG 100 These operations are e AUTO test selection and level setting 4 LINE UP test tone e MANUAL test tone in left right or both channels plus level and frequency setting e MANUAL polarity test tone in left right or both cha
35. 25NS 33 3MHZ 80009 160 7392 04 90 22 10 25 24 3 MOUNTING PARTS 136 0925 00 SKT DIP 91506 224 AG30D END MOUNTING PARTS A2U50 156 0865 02 IC DGTL LSTTL FLIP FLOP 74LS273 DIP20 3 TUBE 80009 156 0865 02 2051 156 0956 02 IC OGTL LSTTL BFR DRVR 74LS244 DIP20 3 TUBE 80009 156 0956 02 A2U52 156 0956 02 IC DGTL LSTTL BFR DRVR 74LS244 DIP20 3 TUBE 80009 156 0956 02 A2U54 156 3547 00 IC MISC 80009 156 3547 00 2055 156 0991 00 671 1758 00 671 1758 00 80009 156 0991 00 LAR VR POS 5 0V 100MA 5 MC78LO5ACP TO 92 A2U62 156 2760 00 IC MISC 0 0 9 051210 2063 160 7394 00 671 1758 00 671 1758 01 5 X 80009 160 7394 00 8 250NS 27C512 DIP28 6 A2U63 160 7394 01 671 1758 02 671 1758 02 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7394 01 8 250NS 27C512 DIP28 6 A2U63 160 7394 02 671 1758 03 671 1758 04 4 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7394 02 8 250NS 270512 A2U63 160 7394 03 671 1758 05 671 1758 05 IC DGTL CMOS EPROM 64K X 80009 160 7394 03 8 25NS 270512 DIP28 6 A2U63 160 7394 04 671 1758 06 IC DGTL CMOS EPROM 64K X 80009 160 7394 04 8 PRGM 25NS 270512 DIP28 6 MOUNTING PARTS 136 0755 00 SKT DIP 09922 DILB28P 108 MOUNTING PARTS A2U64 156 3850 00 IC MEM CMOS SRAM 32K X 80009 156 3850 00 8 120NS 3UA OE DIP28 6 A2U66 156 2009 00 IC DGTL HCMOS FLIP FLOP DUAL D 80009 156 2009 00 TYPE 74HC74 DIP14 3 TUBE A2U67 156 4048 00 5 80009 156 4048
36. 27C512 DIP28 6 MOUNTING PARTS 136 0755 00 SKT DIP 09922 DILB28P 108 END MOUNTING PARTS A2U3 160 7396 00 671 1758 00 4 671 1758 00 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7396 00 8 250NS 27C512 DIP28 6 A2U3 160 7396 01 671 1758 01 67 1 1758 01 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7396 01 8 250NS 27C512 DIP28 6 A2U3 160 7396 02 6 1 1758 02 671 1758 04 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7396 02 8 25 5 27 512 28 6 A2U3 160 7396 03 671 1758 05 671 1758 05 IC DGTL CMOS EPROM 64K X 80009 160 7396 03 8 25N5 27C512 DIP28 6 A2U3 160 7396 04 671 1758 06 IC DGTL CMOS EPROM 64K X 80009 160 7396 04 8 25NS 27C512 DIP28 6 MOUNTING PARTS 136 0755 00 SKT DIP 09922 DILB28P 108 END MOUNTING PARTS A2U4 160 7397 00 6 1 1758 00 671 1758 00 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7397 00 8 250NS 27C512 DIP28 6 A2U4 160 7397 01 671 1758 01 671 1758 01 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7397 01 8 250NS 27C512 DIP28 6 A2U4 160 7397 02 671 1758 02 171 1758 04 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7397 02 8 25NS 270512 DIP28 6 A2U4 160 7397 03 671 1758 05 671 1758 05 IC DGTL CMOS EPROM 64K X 80009 160 7397 03 8 25NS 27C512 DIP28 6 A2U4 160 7397 04 671 1758 06 IC DGTL CMOS EPROM 64K X 80009 160 7397 04 8 25NS 27C512 DIP28 6 MOUNTING PARTS 136 0755 00 SKT DIP 09922 DILB28P 108 END MOUNTING PARTS A2U5 156 2760 00 5 0 0 9 051210 A2U6 156 3850 00 IC MEM CMOS SRAM 32K X 80009 156 3850 00 8 120NS 3UA
37. C37 U29 C38 Back of board C141 J33 C 143 R186 R187 Q18 C97 R29 R30 R31 R32 R33 R34 R181 R182 C99 R69 R70 R71 R72 R75 R74 R183 R184 ASG 100 z Wi 051 EZ 108 U4 123 R190 Y3 5 U39 nde e U40 ca 066 29 20 DIDID C ce C1374 9 o 117 R6 e m U69 C43 25732 U35 R26 21 09 141 C46 2 R14 R25 C95 2175 U36 5 20 R161 m ae c45 22 47 2222 R28 15 FL2 R16 C27 019 122 Wid Lio 9 ses 0 amp FL3 R24 020 a 86 aana R15 R23 C94 C54 Je Ba 252 28 R160 R35 em 2 R36 E ji R27 114 z R180 56 18 53 No R17 C29 VIT E C26 EE C66 25 121 028 5 o D U2 amp zo U46 70 n C102 7 060 lt lt 2 U16 uL RIO R144 R145 TP6 R75 T Chi pees C20 C59 Ta C62 665 027 R185 A2 MAIN BOARD 671 1758 00 03 131 C9 C8 03 U2 J25 R159 088 C85 UM 10 55 5 048 R158 8177 R178 E 128 eT 51 C11 U6 C89 Ut R U67 C77 R149 CL Y2 J 350 627 4 5 789 189 C115 8v id 5 4 C110 089 289 189 68 J 88 219 20 CR15 432 BTI U5 719 601 9012 C113 049 047 050 052 051 R190 U62 5012 012 064 063 0112 7 19 6918 2019 ar Schematic Diagram 2 Component Locator Chart Assem
38. CCF50 2F56201F 322 3289 00 CRB20 FXE 100K 322 3248 00 322 3289 00 322 3289 00 322 3248 00 CRB20 FXE 100K CCF50 1 G33200F CRB20 FXE 1K00 322 3145 00 CRB20 FXE 2 21 CRB20 FXE 2K21 322 3289 00 321 0307 00 20 1 00 322 3285 00 322 3285 00 322 3289 00 322 3301 00 307 0446 00 322 3481 00 CEAD280RO0F 322 3179 00 CRB20 FXE 1K00 322 3258 00 6 13 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued amp Description Code Number A2R160 322 3097 00 RES FXD MET FILM 100 OHM 1 0 2W TC 100 57668 CRB20 FXE 100 PPM AXIAL T amp R SM BODY A2R161 322 3097 00 RES FXD MET FILM 100 OHM 196 0 2W TC 100 57668 CRB20 FXE 100E PPM AXIAL T amp R SM BODY A2R162 322 3356 00 RES FXD FILM 49 9K OHM 196 0 2W TC TO 80009 322 3356 00 A2R163 322 3289 00 6 1 1758 00 671 1758 01 RES FXD MET FILM 10K OHM 1 0 2W TC 100 80009 322 3289 00 PPM AXIAL T amp R SM BODY A2R163 322 3385 00 671 1758 02 RES FXD MET FILM 100K OHM 1 0 2W TC 100 57668 CRB20 FXE 100K PPM AXIAL T amp R SM BODY A2R164 322 3265 00 671 1758 00 671 1758 01 RES FXD MET FILM 5 62K 1 0 2 100 80009 322 3265 00 PPM AXIAL T amp R SM BODY A2R164 322 3361 00 671 1758 02 RES FXD MET FILM 56 2K OHM 1 0 2W TC 100 91637 CCF50 2F56201F PPM AXIAL T amp R SM BODY A2R165 322 3289 00 671 1758 00 671 1758 01 RES FXD MET FILM 10K OHM 1 0 2W TC 100 80009 322 32
39. FILM 9 4 7K OHM 2 0 2W EACH TC 100 PPM SIP10 PIN 1 COM RES FXD MET FILM 4 75K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 475K OHM 1 0 2W TC T0 RES FXD FILM 475K OHM 196 0 2W TC TO RES FXD MET FILM 200K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 200K OHM 196 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 196 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD FILM 2K OHM 0 1 0 2W 9 RES FXD FILM 2K OHM 0 196 0 2W TC T9 RES FXD FILM 665 OHM 0 1 0 2W RES FXD FILM 2K OHM 0 1 0 2W TC T9 RES FXD FILM 2K OHM 0 196 0 2W TC T9 RES FXD FILM 665 OHM 0 1 0 2W RES FXD META FILM 10 OHM 0 196 0 2W TC 2100 RES FXD META FILM 1 21K OHM 0 1 0 2W TC T9 RES VAR NONWW TRMR2K OHM 10 0 5 LIN RES FXD META FILM 10 OHM 0 1 0 2W TC 2100 RES FXD META FILM 1 21K OHM 0 196 0 2W TC T9 RES VAR NONWW TRMR 2K OHM 10 0 5 LIN RES VAR TRMR CERMET 100K OHM 20 0 5W 0 197 SQ SIDE ADJUST T amp R RES VAR TRMR CERMET 100K OHM 20 0 5W 0 197 SQ SIDE ADJUST T amp R RES FXD FILM 143 OHM 1 0 2W TG T0 RES FXD FILM 6 695K OHM 0 1 0 125W TC T9 RES FXD FILM 2 162K OHM 0 1 0 2W TC T9 TAPED amp REELED SM BODY RES FXD FILM 550 OHM 0 1 0 125W TC T9 RES FXD FILM 13
40. Interchannel crosstalk and circuit transposition MANUAL SIGNAL TESTING Line Up The Line Up test signal is selectable in both frequency and amplitude for use in providing a known line up signal for adjusting levels from various audio sources This signal may be set for a house standard and then fixed editing disabled or it may remain controllable from the front panel The frequency range is from 10 Hz to 20 kHz and the amplitude range is from 90 dBu to 24 dBu As shipped from the factory and the default if factory defaults are reloaded the Line Up signal is 400 Hz at 0 0 dBu Manual Tone The Tone test signal comes as stereo left tone and right tone The frequency and amplitude are selectable over the same range as the Line Up signal The factory default for the Tone signals is 440 Hz at 0 0 dBu Polarity Polarity also comes as stereo left polarity and right polarity The polarity test signal is the sum of a fundamental sine wave of 440 Hz and its equal amplitude second harmonic sine wave of 880 Hz The amplitude of the polarity signal is selectable from 90 dBu to 24 dBu with a fixed fundamental frequency of 440 Hz The factory default for the amplitude is 0 0 dBu Multitone The Multitone signals also come as stereo and left and right channels Multitone signals are composed of a selected set of sine wave frequencies The amplitude of the multitude signal is selectable from 90 dBu to 24 dBu The output signal am
41. Internal Settings and Setup Editing For more information on adjusting frequency and amplitude values refer to the FREQUENCY and AMPLITUDE descriptions Polarity Tests Most audio systems require signal polarity to be preserved through the distribution system In stereo systems polarity is especially important for stereo imaging and for monaural compatibility If polarity is reversed in one channel of the stereo pair monaural signals cancel The MANUAL Polarity functions Polarity L Polar and R Polar generate special polarity signals that make it easy to test polarity in the audio path and assure correct wire connections for balanced audio output This is the same polarity signal included in the TEK automatic test sequence ASG 100 Service Manual Operation and Setup Multitone Tests The Multitone functions MTonel MTone2 MTone3 and MTone4 and their right and left channel choices R MTonen and L MTonen provide signals that are composed of selected sets of sine wave frequencies These signals are used to check audio circuit frequency response and total harmonic distortion and noise levels in audio circuits Manual Test Level You can display the amplitude of the manual signals by pressing the AMPLITUDE button when a manual test name is displayed You can edit the amplitude of any of the manual tests using the arrow buttons when manual test editing is enabled In normal use editing of the Manual Test may most often be enabled simply b
42. KARL BRAUN DR PO BOX 500 600 18TH AVE 10156 TORINO City State Zip Code ST PAUL MN 55144 0001 PORT WASHINGTON NY 11550 SANTA ANA CA 92702 ELGIN IL 60120 BEAVERTON OR 97077 0001 ROCKFORD IL 61108 5181 VAICENTALLO 62 455 ITALY 8 3 Replaceable Mechanical Parts Fig amp index No 1 1 bh kK d b amp b 2a 12 15 16 27 Part 200 3870 00 211 0119 00 426 2420 00 211 0119 00 366 2167 00 211 0244 00 333 3881 00 337 3749 00 211 0101 00 211 0244 00 211 0244 00 337 3738 00 348 0844 00 211 0012 00 210 0586 00 174 2495 00 174 2496 00 196 1213 00 211 0244 00 211 0722 00 214 3903 01 348 0844 00 200 3869 00 200 3869 01 200 3869 02 Seria Number Effective Dscont Qty 12345 010100 032106 010100 031904 032106 032105 031903 032105 4 Name amp Description COVER TOP ALUMINUM ASG100 MOUNTING PARTS SCREW MACHINE 4 40 X 0 25 FLH 100 DEG STL MOUNTING PARTS FRAME FRONT ALUMINUM ASG100 MOUNTING PARTS SCREWMACHINE 4 40 X 0 25 FLH 100 DEG STL END MOUNTING PARTS KNOB GRAY 0 125 ID X 0 392 OD X CIRCUIT BD ASSY FRONT PANEL SEE A1 REPL MOUNTING PARTS SCRASSEM WSHR 4 40 X 0 312 PNH STL END MOUNTING PARTS PANEL FRONT ASG100 PROTECTOR SW TV GRAY POLYCARBONATE CIRCUIT BD ASSY MAIN SEE A2 REPL MOUNTING PARTS SCREWMACHINE 4 40 X 0 25 FLH 100 DEG STL SCRASSEM WSHR 4 40 X 0 312 P
43. MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 0 100 AXIAL T amp R Mfr Code 80009 80009 04222 00853 04222 80009 80009 04222 80009 24165 04222 54473 04222 24165 24165 55680 24165 24165 55680 80009 55680 04222 04222 04222 24165 04222 04222 80009 04222 04222 04222 04222 04222 04222 04222 04222 04222 04222 Number 290 0848 00 283 0599 00 5 205 104 D105E330G0 SA205C104MAA 290 0848 00 290 0990 00 SA205C104MAA 290 0848 00 513D107M025BB4D SA205C104MAA ECE A50N1 SA102A101JAA 513D105M063JA4D 513D105M063JA4D UVX1H100MAA 5130105 063 40 513D105M063JA4D UVX1H100MAA 283 0167 00 UVX1H100MAA SA205C104MAA SA205C104MAA SA205C104MAA 513D105M063JA4D SA102A330JAA SA102A330JAA 290 0950 00 5 205 104 SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA SA205C104MAA 6 7 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued amp Description Code Number A2C88 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 5 205 104 0 100 AXIAL T amp R 2 89 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C93 283 0359 00 DI 1000PF 10 200V 0
44. Power Supply EPROM Display 120 240 V Front Panel PAL SE elects 8751 Front Panel Interface 50 Pin x 8 BIT lt 1 gt CONTROL PROCESSOR lt 5 gt HEADPHONE AMPLIFIER Battery Backup aT Volume Headphone I Amplifier Phones Chip Selects Left I Host EPROM RAM Control Lines Port 64K x 24 BIT 8K x 8 BIT Register Phones Right Headphone Amplifier DSP Bus Left D A Low Pass Left Step Audio Converter Filter Attenuator Out Left Audio ee Data F Synchronizer Ces in Left Right Step i Audio i x PT lt 6 gt MICROPHONE lt 3 gt DIGITAL TO 4 CH 1 AND 2 Audio ANALOG CONVERTER GAIN ATTENUATOR In Right _ ER REAR PANEL KEY SIGNAL LINE CONTROL LINE SCHEMATIC DIAGRAM NUMBER lt n gt ASG 100 Block Diagram J11 9 914 C138 2 0113 R167 13 614 L2 L 813 614 Static Sensitive Devices See Maintenance Section W 23 C140 0v d 699 ety 084 6 14 784 284 04 05 08 09 012 013 017 WI R37 Q2 CR4 CRO 03 R38 R45 R46 R41 Q6 CR6 CR Q7 R42 R77 CR8 CRI 011 R78 R85 R86 R81 CR10 R168 Q19 R176
45. TC 100 57668 CRB20 20 0 PPM AXIAL T amp R SM BODY A2R112 322 3318 00 RES FXD MET FILM 20K OHM 1 0 2W TC 100 57668 CRB20 20 0 PPM AXIAL T amp R SM BODY A2R113 322 3097 00 RES FXD MET FILM 100 OHM 1 0 2W TC 100 57668 CRB20 FXE 100E PPM AXIAL T amp R SM BODY A2R114 322 3318 00 RES FXD MET FILM 20K OHM 196 0 2W TC 100 57668 CRB20 FXE 20 0 PPM AXIAL T amp R SM BODY A2R115 322 3265 00 671 1758 00 671 1758 01 RES FXD MET FILM 5 62K OHM 1 0 2W TC 100 80009 322 3265 00 PPM AXIAL T amp R SM BODY A2R115 322 336 1 00 671 1758 02 RES FXD MET FILM 56 2K OHM 1 0 2W TC 100 91637 CCF50 2F56201F PPM AX AL T amp R SM BODY 6 12 ASG 100 Component Tektronix Number A2R117 A2R117 A2R118 A2R119 A2R120 A2R121 A2R122 A2R123 A2R124 A2R124 A2R126 A2R126 A2R127 A2R128 A2R129 A2R130 A2R132 A2R133 A2R134 A2R135 A2R136 A2R137 A2R138 A2R140 A2R141 A2R142 A2R143 A2R144 A2R145 A2R148 A2R149 A2R153 A2R154 A2R158 A2R159 ASG 100 Part Number 322 3289 00 322 3385 00 322 3114 00 322 3318 00 322 33 18 00 322 3318 00 322 3097 00 322 3318 00 322 3265 00 322 3361 00 322 3289 00 322 3385 00 322 3248 00 322 3289 00 322 3289 00 322 3248 00 322 3385 00 322 3243 00 322 3193 00 322 3145 00 322 3226 00 322 3226 00 322 3289 00 321 0307 00 322 3193 00 322 3285 00 322 3285 00 322 3289 00 322 3301 00 307 0446 00 322 3481 00 321 0140 00 322 317
46. Values one or greater are in picofarads pF Values less than one in microfarads Hesistors Ohms Q Cam Switch Closure Chart Dot indicates switch closure The following information and special symbols may appear in this manual Assembly Numbers Each assembly in the instrument is assigned an assembly number e g A20 The assembly number appears on the diagram in circuit board outline circuit board illustration title and lookup table for the schematic diagram The Replaceable Electrical Parts List is arranged by assembly number in numerical sequence the components are listed by component number Example Component Number A23 2 R1234 Chassis mounted components have no Assembly No prefix See end of ReplaceableElectrical Parts List Assembly Subassembly Number Number if used Schematic Circuit Number Grid Coordinates schematic diagram and circuit board component location illustration have grids A lookup table with the grid coordinates is provided for ease of locating the com ponent Only the components illustrated on the facing diagram are listed in the lookup table When more than one schematic diagram is used to illustrate the circuitry on a circuit board the circuit board illustration may only appear opposite the first diagram the lookup table will list the diagram number of other diagrams that the other circuitry appears on Function Block Title
47. With 600 9 load the output will be reduced by 0 17 dB see Figure 2 8 If you change the source impedance to 600 Q and use the unit a power matched system with 600 Q loads the actual output delivered to the load will be 6 dB less than the displayed value If you use a custom resistor network to implement some other source impedance the output levels will be reduced by a different factor which you must calculate and take into account when reading the displayed values see Figure 2 9 ASG 100 Service Manual Operation and Setup Source R 12 Q LST AD i hol i iji j 2 dBu tt 4 3 TOR 5 UJ 4 u 1009 2000 3000 4000 5005 6002 7000 8000 9000 10000 11000 12000 Load H The general formula for calculating the dBu difference when the source resistance is held at 12 Q and the load resistance varies is 12 Q dBudiff 20 10411 Rroad 12 Q Using the above formula it can be seen that the front panel ASG 100 dBu reading approximately corresponds to dBm when driving a 600 load The difference between actual dBm and the ASG 100 readout is 0 17 dB with a 600 Q load The output amplifiers of the ASG 100 are current limited The load resistance should not be less than 150 Q Figure 2 8 Effects of a changing load resistance on the dBu output of the ASG 100 Operation and Setup ASG 100 Service Manual Load R Source R
48. a terminal or terminal emulating computer through a properly configured communications cable ASG 100 Service Manual A 1 Remote Operation ASG 100 Service Manual The functions of the pins on the remote connector are shown in Table A 1 On the ASG 100 end the DTE cable you use must be connected to a 9 pin female connector conforming to this configuration Table A 1 Pin Connections for Remote Connector Signal Signal Description Name a Data Carrier Detect not connected Received Data connected Transmitted Data connected Contact closure with pin 6 enables editing of function settings Contact closure with pin 9 starts AUTO test Do not connect this pin with the remote terminal via the RS 232C interconnection cable Signal Ground Common Return connected Contact closure with pin 4 enables editing of function settings Do not connect this pin to the remote terminal via the RS 232C interconnection cable om S Request to Send not used in the ASG 100 cs Clear to Send not used in the ASG 100 Contact closure with pin 4 starts AUTO test Do not connect this pin to the remote terminal via the RS 232C interconnection cable On the remote terminal end the configuration of the cable connector should match that of the terminal s serial port The cable configurations for communication between the ASG 100 and PCs and compatibles operating as data terminal equipment are shown in Fi
49. and that at the end of the test sequence the ASG 100 goes off line Check AUTO Test Sweep and SweepLev Operation a b Set the ASG 100 for the Sweep Auto Test Press and hold the AMPLITUDE button The message SweepLev should be displayed Release the button Check that the SweepLev maximum value is 24 0 dBu and its minimum value is 90 0 dBu Edit the SweepLev to 1 dBu Verification and Adjustment ASG 100 Service Manual 15 Press the AUTO button to return to the top of the menu then press the Save button Saved message should appear Reset the ASG 100 by pressing the left and right arrow buttons at the same time Check that the ASG 100 initializes with the Sweep test displayed in the readout window and that the SweepLev is 1 dBu Press the ON LINE button and listen in the headphones for the Sweep test sequence to occur and that at the end of the test sequence the ASG 100 goes off line Check Remote Operation a Connect the ASG 100 to an ASCII terminal or PC running terminal communications software See Appendix A for serial communications setup and remote operation if necessary Turn the power off and back on again to check the power up messages Type to obtain the ASG 100 Remote Command Menu tone 1 4 2000 cr Check that the ASG 100 goes on line with the word Tone displayed Type offline cr Check that the ASG 100 goes off line Type tone Check that the returned Tone frequency is
50. and 3a Digital Formatter Synchronizer The serial data from the DSP section comes into U66A pin 2 a D flip flop used as a data synchronizer The incoming serial data is synchronized to the PCM clock PCMCLK and sent to a shift register consisting of U16 17 18 and 19 The first shift register U16 takes the 24 bit DSP serial data with trailing zeros and shifts it six places This gives the data string leading zeros for input to the 18 bit DAC This six place shift moves the 24 bit input data to the 18 bit data positions used by the DACs Data exiting U16 may be jumper configured for either 18 bit or 20 bit data format 18 bit is used The U16 18 bit serial data goes two places to U14 as the input data to the right channel and to three more stages of 8 bit shift registers U17 18 and 19 These registers shift the data another 24 bits before it goes to the left channel DAC The output of the DSP is interleaved right and left channel data The time needed to shift the left channel data an extra 24 bits allows the left and right channel data to arrive at the same time for conversion Since both DACs U15 left and U14 right have their data registers filled at the same time they both use the same latch enable signal PCMLE to latch the data Digital to Analog Converters This section discusses the right channel DAC U14 and it associated circuitry The left channel circuitry U15 U21 is identical DAC U14 is an 18 bit digital to a
51. assembly The block diagram is a valuable aid in signal tracing and circuit isolation Use extreme care when probing with meter leads or probes because of the high component density and limited access within the instrument The inadvertent movement of leads or a probe could cause a short circuit or transient voltage capable of destroying components Determine the nature of the problem Attempt to make the determination of whether the instrument is out of calibration or if there has been a component failure Once the type of failure has been determined proceed on to identify the functional area most likely at fault Visually inspect the suspect assembly for obvious defects Most commonly these will be broken or loose components improperly seated components overheated or burned components chafed insulation etc Repair or replace all obvious defects In the case of overheated components determine the cause of overheating and correct the cause before re applying power Use successive electrical checks to locate the source of the problem At times it may be necessary to change a calibration adjustment to determine if a circuit is operational but since this can destroy instrument calibration care should be exercised Before changing an adjustment note its position so that it can be returned to its original setting Determine the extent of the repair If the necessary repair is complex it may be advisable to contact your local Tektronix fi
52. auto and remote tone polarity and mtone commands allow you to specify optional arguments as indicated by the bracketed text in Figure A 4 shown previously The following text describe the syntax for these remote commands Type in the commands exactly one command to a line do not add extra spaces or other punctuation in front of a command After the command use one space before an argument and as a separator when two arguments are used as in the case of setting both amplitude and frequency for tone For example tone 1000 1 2 5 The order of the arguments does not matter and the arguments not case sensitive The command may be all upper case all lower case or mixed The command line terminator is the carriage return cr The special control characters control C control S and control Q are received immediately without waiting for a carriage return auto I eve test_name Level is an optional argument The test level reference for the auto test sequence is specified If the argument is not used the auto test level reference remains at the last selected value The valid arguments are 14 dBu to 6 dBu in whole integer values For example 1 5 1 0 1 3 etc Error messages are generated if a limit violation is detected in the argument if help is on Test name is also an optional argument The argument is a text string specifying which automatic test sequence you want to send If you do not specify a test name the auto
53. before returning the prompt Aborting the auto test sequence is a precaution because the processor of the ASG 100 is also sending the commands needed to generate the test signals in the proper time sequence Any interruption to handle communications may corrupt the timing of the test sequence A 13 Remote Operation ASG 100 Service Manual Table A 6 Test Name Arguments to Remote AUTO Command Ue 0 sans Mm Medium Band Sound Program with Microphone with Voice ID Voice ID Narrow Band with Voice ID Line Level with Voice ID Narrow Band Sound Program with 0 33 04 Transmitter Tek 94 Compandor Narrow Band Sound Program with 0 33 04 Transmitter with Voice ID Tek 94V Compandor with Voice ID 3 Level Alignment Signal for 0 33 05 Stereo with Crosstalk Tek 95 International Sound Program without Stereo with Crosstalk and Voice ID Station Identifier rll tone f frequency l ever A 14 The tone remote command with no arguments makes the ASG 100 send the currently selected MANUAL test tone through the right and left channels at the same time The rtone and ltone versions of this command send the MANUAL test tone through the right and left channels respectively query of any of the tone commands in the form of tone returns the current frequency and level setting of the manual tone signals The frequency argument specifies a desired frequency for the manual test tone Enter the initial characters o
54. command initiates the test last selected The level and test name arguments for auto are not order sensitive and either may be used first The text strings to use for the test sequences supplied by Tektronix are listed below Table 6 Enter the arguments with punctuation exactly as shown The command to send the 90 test at 0 0 dBu will look like this auto tek 90 1 0 or AUTO TEK 90 1 0 help query of the auto command in the form of auto help returns a list of the legal arguments available with the auto command error in the test name argument also results in a display of the legal arguments if help is on When the sequence is done the ASG 100 sends the below message followed by the ASCII bell character Auto sequence done programmer may choose to watch for the so that all other commands are held off until the test sequence is done Another option is to put in a wait state long enough for the test sequence to finish wait state would be required if the helpoff command 15 in effect as the ASG 100 will not return any messages or prompts in this state Aborting an Auto Sequence An auto test sequence is aborted if ANY communication is received after the command 15 given until the auto test sequence is done The message Aborting time sequence executing new command 1s generated Sending a carriage return only halts the AUTO sequence and the ASG 100 waits for a second carriage return or a new command to execute
55. editing function FRONT PANEL CONTROLS The following text details the operation of the front panel controls and indicators A front panel illustration is shown in Figure 2 2 for reference Tektronix 100 AUDIO SIGNAL GENERATOR LINE UP MANUAL VOLUME HEADPHONES AUTO ON LINE SILENCE VOICE L RECORD J 00 o D 0 OUTPUT 2775mV rms IDENTIFICATION FREQUENCY AMPLITUDE PAUSE AUTO Figure 2 2 ASG 100 Front Panel controls FUNCTIONS The ASG 100 is powered on and off with the power switch to the right of the power receptacle on the back panel The ASG 100 functions are enabled from the front panel through the six larger buttons These main selection buttons have LED in the center that indicates the choice is selected The ON LINE LED is red the remaining five are green The smaller buttons are controls that let you display and adjust the values associated with the various test functions The test signal functions initiated by the five main selection buttons to the right of the ON LINE button are mutually exclusive in most cases enabling one of these five signal functions automatically disables the previously selected function There are two exceptions to this e To initiate a continuously alternating voice ID and line up tone press the VOICE and LINE UP buttons simultaneously Both LEDs will be on and the display is Voi Lnup 2 2 ASG 100 Service Manual Operation and Setup record
56. four seconds of voice for identification purposes press the VOICE and SILENCE buttons simultaneously The recording process is cued with Record Ready and Begin then a four second countdown is displayed to time the recording After that time the selected function returns ASG 100 outputs the selected signal only when the ON LINE function is enabled The lighted ON LINE button indicates that the ASG 100 has interrupted the source signal and connected its own output circuit to the downstream audio path The ASG 100 sends all signals it generates to the signal ports on the back panel and to the headphones jack on the front panel When the ASG 100 is not on line the incoming program audio if any is applied to the loop through connectors may be monitored at the headphone jack ON LINE When the ON LINE function is enabled indicated by the red LED in the center of the button the ASG 100 interrupts any source audio signal before it in the audio path and sends the currently selected test tone or pattern to the audio equipment after it Selecting any signal choice while on line is permitted However when AUTO is selected that test must be completed before any other choice except off line is permitted Off line is selected from the front panel by pressing the ON LINE button a second time When one of the AUTO mode automatic test sequences is selected the ASG 100 reverts to off line status the red LED turns off when the selected
57. parts are available through the local Tektronix Inc field office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to improve circuit performance Therefore it 15 important to include the following information when ordering parts 1 Part Number 2 Instrument Type or Number 3 Serial Number 4 Modification or Option Number if applicable 3 7 ASG 100 Service Manual If a part has been replaced with a new or improved part the new part will be shipped if it is a direct replacement If the part is not directly replaceable the local Tektronix field office or representative will contact the customer concerning any changes After any repair circuit readjustment may be required Removal and Replacement Procedures 3 8 Tools required 1 2 inch open end wrench 1 16 inch hexagonal wrench 3 32 inch flat bit screwdriver 1P POZIDRIV screwdriver 3 16 inch nutdriver Cabinet Removal and Replacement 1 Disconnect the power cord from the rear of the instrument 2 Remove the six POZIDRIV screws holding the top cover to the chassis Do not remove the two screws that hold the small access plate on the left side Lift the top cover off the instrument Front Panel Removal and Replacement 1 Disconnect J20 headphone connector from the main board and disconnect J2 microphone cable from the front panel board 2 Useasm
58. persistent conductivity through conductive dust rain or snow Typical outdoor locations 1 6b ASG100 Service Manual ASG 100 Service Manual POWER CORD OPTIONS Table 1 5 Introduction and Specification Voltage Fuse 4 and Power Cord Data Plug Power Cord and Configuration Category Plug Type U S Domestic Standard Australian Option A3 240 V 10 A North Option A4 American 240 15 Switzerland Option A5 220 6 4 All options listed come with a factory installed fuse for the selected operating voltage range b Reference Standards Abbreviations ANSI American National Standards Institute AS Standards Association of Australia BS British Standards Institution Voltage Range 115 V Nominal 90 V to 132 V 230 V Nominal 180 V to 250 230 V Nominal 180 V to 250 V 230 V Nominal 180 V to 250 V 230 V Nominal 180 V to 250 230 V Nominal 180 V to 250 V CEE Intemational Commission on Rules for the Approval of Electrical Equipment IEC Intemational Electrotechnical Commission NEMA National Electrical Manufacturer s Association SEV Schweizervischer Elektrotechnischer Verein UP Underwnters Laboratories Inc A 6 Ampere type C fuse is also installed inside the plug of the Option A2 power cord Reference Standards P ANSI C73 11 NEMA 5 15 P IEC 83 UL 198 6 CEE 7 IV VII 83 IEC 127 BS 1363 IEC 83 IEC 127 AS C112 IEC 127 ANSI C73 20 NEMA 6 15 P IEC 83 U
59. reference is settable to a different level than the reference level for the CCITT O 33 and TEK tests When setting the SweepLev value one of the sweep signals Sweep R Sweep or L Sweep must be the selected AUTO test Editing is done as above for TEST ASG 100 Service Manual Operation and Setup Lev when editing is enabled As with TEST Lev you cannot go ON LINE with the SweepLev displayed LINE UP The LINE UP function generates a single tone at a standard frequency and amplitude The factory default setting is 400 Hz at 0 dBu Once you have pressed the LINE UP button you can display the frequency or amplitude of the tone by pressing the FREQUENCY or AMPLITUDE button For information on adjusting their values when editing is enabled to allow this refer to the FREQUENCY and AMPLITUDE descriptions The frequency and amplitude of the LINE UP tone may be programmable from the front panel If you change the Line up parameters and want to lock in the new values so they cannot subsequently be changed from the front panel the editing function can be disabled For more information refer to Internal Settings and Setup Editing Alternating VOICE and LINE UP This feature is not indicated on the front panel of the ASG 100 Pressing the VOICE and LINE UP buttons together makes the ASG 100 continuously send the recorded voice pattern alternated with the specified line up tone when ON LINE The voice amplitude level follows the level setting of th
60. right and left channels respectively The multi tone signal wanted must be designated Sending mtone alone does not cause a default multi tone to be sent query of any of the multi tone commands in the form of mtonel returns the current level setting of the manual multi tone signals The level argument specifies a desired amplitude for the multi tone test signal Enter the initial characters of this argument 1 literally as shown Specify level as a number representing the amplitude in dBu change in the level applies to all the multi tone signals error in the level argument specifying a level outside the legal range or bad syntax will result in an error message being generated if help 1s on If you want to specify a negative amplitude you must prefix the value with a minus sign for example 4 Otherwise the value is assumed to be positive You can also explicitly specify a positive amplitude with a plus sign prefix for example 6 There is no frequency argument for multi tone The test signals are composed of sets of equal amplitude sine waves at predetermined frequencies and there is no specific frequency associated with multi tones Attempting to send a frequency argument to multi tone will result in an error message being generated if help is on 15
61. sequences with the AUTO function The AUTO test sequences that include a voice segment in the preamble are identified by a V suffix on the sequence name For example the TEK mono test sequence that includes a voice segment is displayed as TEK 90V IDENTIFICATION The identification code consisting of 4 alphanumeric characters and various punctuation characters provides a way to identify the test signals generated For example you could use it to designate the location from which the signal is being generated This feature is very useful when there may be multiple signal sources arriving at a central control point for testing audio signal paths The IDENTIFICATION control is active only when the AUTO function the selected but off line It lets you see what the current four character code that is transmitted as part of the preamble is The 2 7 Operation and Setup ASG 100 Service Manual preamble is a set of initializing data the ASG 100 prefixes to some of the standard test signal sequences it generates To see the current identification code press the AUTO button then the IDENTIFICATION button If editing is enabled you can change the identification code using the Arrow Buttons For information on enabling editing refer to Internal Settings and Setup Editing For more information on adjusting values using the arrow buttons refer to Arrow Buttons FREQUENCY The FREQUENCY control displays either the frequency of the LINE
62. side of the headphones The purpose of R118 is to equalize the gain difference between low and high impedance headphones Preview Termination Transistors In Normal the PREV1 and PREV2 signals are terminated by 918 and 919 The low PREVIEW control signal is inverted by U40A and the high NORM signal forward biases Q18 and Q10 With these transistors on the PREV1 and PREV2 signals are shunted to ground through the transistors In Preview 918 and Q19 are biased off and the and 2 signals are switched to the input of the headphone amplifiers U33 and U36 The current use for this Preview circuit is to send Silence to the headphones during VOICE recording In Normal either the ASG 100 output signal or the program signal is applied to the headphones MICROPHONE PREAMPLIFIER Diagram 6 Microphone Input Amplifier In the preamp and AGC part of the microphone circuitry the front panel microphone connects to the main board via 47 Input amplifier U42B provides relatively low level amplification for the microphone input signal about 12 4 dB The gain of this stage is low to reduce extra background noise so the user must speak directly into the microphone to record the VOICE identification signal with good amplitude 5 1 Zener diode VR3 through resistor R137 connected to the microphone input supplies voltage to power the FET amplifier inside the condenser microphone AGC and Output Amplifier The output of the mic
63. test sequence is finished and sends a message to that effect over the serial port Off line reconnects the incoming source audio signal if any to the equipment following the ASG 100 in the audio path NOTE The ASG 100 will not go on line when the front panel ON LINE is pressed when the AUTO ID TESTLev or SweepLev is being displayed You must return to the AUTO Test Selection display or select another test signal SILENCE The SILENCE function makes the ASG 100 generate no signal With SILENCE enabled any signal shown on the VM700A Option 40 and Option 41 or other monitoring equipment is the noise picked up along the audio path following the ASG 100 The ASG 100 must be ON LINE to send silence just as for the other functions VOICE VOICE function continuously replays the 4 second voice identifier the ASG 100 is currently programmed to send The voice signal level follows the setting of the LINE UP signal amplitude setting RECORD PRESS SILENCE VOICE The RECORD function records 4 seconds of voice input through the built in microphone You enable this function by pressing the SILENCE and VOICE buttons simultaneously there is no remote RECORD command While the two buttons are held in the display window shows the prompt Record When the buttons are released the display changes to Ready then Begin and a countdown from 4 0 to 0 0 During the four second countdown the ASG 100 records 2 3 Operation an
64. the address sent in the control lines Switching Control Signals In response to request from the front panel or through the remote control port for a new signal level the DSP generates the needed switching signals on its data bus These control signals CTRLA CRTL 11 are latched into U10 and U11 diagram 2 where they are held until a different ASG 100 Service Manual Theory of Operation signal level is called for The control signals switch the left and right attenuators U22 and U28 for the needed attenuation step and set the gain of the left and right channel output buffers The gain of the buffer stages is controlled by switching in the feedback loop of the amplifiers to produce either 0 dB or 10 dB gain Output Buffers The output of the multiplexers U22 left and U28 right is a step attenuated sine wave of operator selected amplitude The multiplexer output signal goes to the output buffers U23A and 02 05 left U29A Q10 Q13 right On the right channel the first stage of the output buffer is U29A an op amp driving a push pull output stage that is current limited to 50 mA peak current limit is set by R80 and R79 A50 mA current through R80 and R79 develops 0 6 V causing Q10 or Q11 to switch on and divert drive current away from the output transistors Q12 and Q13 This protects the output transistors from load short circuits Normal maximum output at unity gain is 14 dBu which is 1 9457 volts RMS per side This buff
65. to 24 dBu When help is on the ASG 100 sends a reply of Auto sequence done when the auto sequence has completed auto returns the selected test sequence the current ID and the level settings for Test Level and Sweep Level auto help returns a list of valid arguments for the auto command help All forms of this command return list of ASG 100 commands dq Turns off the help replies error messages and prompts Test signal queries are answered helpon Turns the help replies error messages and prompts back on Sets a new 4 character ID All printable ASCII characters are valid and all four characters must be used Spaces are valid The query returns the 4 character ID Remote Operation ASG 100 Service Manual Table A 3 cont Commande Argument Argument Queries lineup Sends the line up signal to both channels The frequency and level cannot be changed remotely variable tone signal is needed fora special line up use the tone test Signal The query returns the present level and frequency for the lineup signal Imtone lt 1121314 gt I level Imtone n Sends the selected multi tone 1 2 3 or 4 to the left channel at the current level The level argument sets the new signal level from 90 dBu to 24 dBu The query returns the present level for the multi tone test signals lpolr Sends the polarity signal to the left chan
66. to fetch instructions from external RAM The bit manipulation registers are addressable 8 bit registers and the individual bits can be checked compared complemented zeroed etc as needed by the task being performed The processor also has built in timers One of these is used to generate the interrupts needed for the front panel scanning that checks for switch presses There are three main buses to and from the processor These are the 16 bit address bus AD0 AD7 and 8 15 the 8 bit data bus ADO AD7 and the 8 bit control bus PROGO PROGS and DSR Notice that the lower 8 bits of the address are multiplexed with the data on the ADO AD7 pins The data is separated from the address information by address latch U47 when the ALE address latch enable bit is high When the ALE bit is low PROG the data on the bus is valid The PSEN control line dictates when the EPROM U63 is enabled to output data to the data bus It is also one of the input signals to the address decoder U49 that are decoded to produce the various enable strobes for the digital devices on the processor buses Another bus to the processor is the one that handles the serial communications RDX TDX INTO RTS CTS and RD and provides the RD and WR read and write control signals to the devices on the data bus of the processor Subsets of the various bus signals are used to communicate with the DSP processor and the front panel character display de
67. 0 001UF 1096 200V 51406 A2C132 283 0067 00 671 1758 00 671 1758 03 CAPFXD CER Di 0 001UF 10 200V 51406 A2C133 283 0067 00 671 1758 00 671 1758 03 DI 0 001UF 10 200V 51406 A2C134 283 0067 00 671 1758 00 671 1758 03 CAP FXD CER DI 0 001UF 10 200V 51406 2 137 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 04222 5 205 104 0 100 AXIAL T amp R A2C138 281 0775 02 671 1758 04 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 04222 5 205 104 0 100 AXIAL T amp R 6 8 ASG 100 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number PartNumber Effective Discontinued Name amp Description Code Number 2 139 281 0775 02 671 1758 04 CAP FXD CER MLC O 1 UF 2096 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C140 281 0775 02 671 1758 04 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C141 283 0047 00 671 1758 00 4 671 1758 03 270 5 500 80009 283 0047 00 A2C141 281 0765 00 671 1758 04 DI 100PF 596 100V 04222 SA102A101JAA A2C142 290 0973 00 671 1758 04 CAP FXD ELCTLT 100UF 20 25VDC 24165 513D107M025BB4D 26143 283 0047 00 671 1758 00 671 1758 03 DI 270PF 5 500V 80009 283 0047 00 26143 281 0765 00 671 1758 04 CAP FXD CER DI 100PF 5 100V 04222 SA102A101JAA A2CR4 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 DO 35 T amp R A2CR5 152
68. 00 MOUNTING PARTS 136 0925 00 SKT DIP 91506 224 AG30D END MOUNTING PARTS A2U68 156 2735 00 IC LIN BIPO 80009 156 2735 00 LAR VR POS 12V 100MA 596 MC78L12ACP TO 92 A2U69 156 1160 00 IC LIN BIPO 80009 156 1160 00 LAR VR POS 12V 100MA 4 LM78L12ACH TO 39 A2U70 156 1207 00 IC LIN BIPO 80009 156 1207 00 LAR VR NEG 12V 500MA 3 LM320H 12 T0 39 A2VR3 152 0195 00 DIO ZENER 5 1V 596 0 4W 1N751A FMLY DO 35 OR 80009 152 0195 00 7 ASG 100 6 17 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued Name amp Description Code Number A2VR4 152 0395 00 DIO ZENER 4 3V 5 0 4W 1N749A DO 35OR7 TR 80009 152 0395 00 A2VR5 152 0395 00 DIO ZENER 4 3V 596 0 4W 1N749A DO 35 OR 7 80009 152 0395 00 A2W1 131 0566 00 BUS CNDCT DUM RES 0 094 OD X 0 225 L 80009 131 0566 00 A2W5 131 4566 00 671 1758 01 671 1758 03 5 0 OHM 300 SPACING SM BODY 80009 131 4566 00 A2W123 131 0566 00 BUS CNDCT DUM RES 0 094 OD X 0 225 L 80009 131 0566 00 2 2 158 0393 00 XTAL UNIT QTZ 11 0592 2 0 005 SER ESR 80009 158 0393 00 MAX 30 OHMS HC 49 U PKG ATTACHED PARTS 346 0032 00 STRAP RETAINING 0 075 DIA X 4 0 L MLD RBR 98159 2829 75 4 END ATTACHED PARTS A2Y3 119 4072 00 OSC XTAL CLK 18 432MHZ 0 01 HCMOS 0 TO 80009 119 4072 00 70 DEG C 4 PIN 14 PIN DIP COMPATIBLE A3 119 4112 00 POWER SUPPLY SWING AUTO IN 85 264VAC 80009 119 4112 00 47 440HZ OUT 5VDC 5A 15V 2A
69. 009 311 2482 00 A1R6 315 0221 00 RES FXD FILM 220 OHM 5 0 25W 80009 315 0221 00 A1R7 307 0793 00 671 1763 00 671 1763 00 RES FXD CMPSN 0 5 OHM 5 0 5W 57668 TR50J EOESE A1R7 308 0793 00 671 1763 00 RES FXD 0 51 OHM 5 1WTC 150PPM DEG 80009 308 0793 00 T amp R 151 260 2384 00 SW PUSH SPST MOM NO 100 GRM FRC COND 80009 260 2384 00 RBR CONT RED LED W KEYCAP HL20 LSR ATTACHED PARTS 366 067 1 00 PUSH BTN W LENS HL20 1101 80009 366 067 1 00 END ATTACHED PARTS 152 260 2442 00 SW PUSH SPST MOM NO 100 GRM FRC COND 80009 260 2442 00 RBR CONT GRN LED W KEYCAP HL20 LSG ATTACHED PARTS 366 0671 00 PUSH BTN W LENS HL20 1101 80009 366 067 1 00 END ATTACHED PARTS 153 260 2442 00 SW PUSH SPST MOM NO 100 GRM FRC COND 80009 260 2442 00 RBR CONT GRN LED W KEYCAP HL20 LSG ATTACHED PARTS 366 067 1 00 PUSH BTN W LENS HL20 1101 80009 366 067 1 00 END ATTACHED PARTS A184 260 2442 00 SW PUSH SPSTMOM NO 100 GRM FRC COND 80009 260 2442 00 RBR CONT GRN LED W KEYCAP HL20 LSG ATTACHED PARTS 366 067 1 00 PUSH BTN W LENS HL20 1101 80009 366 0671 00 END ATTACHED PARTS 6 4 ASG 100 Number 155 156 157 158 159 1510 1511 1512 1513 1514 2 2 2 2 2 2 A2 A2 A2 A2 2 1 203 A2C4 ASG 100 Replaceable Electrical Parts Serial Assembly Number Mfr Mfr Part Part Number Effective Discontinued Name amp Descript
70. 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR6 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 DO 35 T amp R A2CR 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR8 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR9 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR10 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR11 152 0141 02 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2CR14 152 0066 00 671 1758 00 671 1758 03 DIO RECT 400V 1A IFSM 30A 1 2VF 2US GP10G 1 05828 GP10G 020 N5060 T amp R SAF CONT A2CR15 152 0141 02 671 1758 00 671 1758 03 DIO SIG ULTRA 80009 152 0141 02 FAST 40V 150MA 4NS 2PF 1N4152 D0 35 T amp R A2DS 150 1033 00 DIO OPTO LED AMBER 585NM 2MCD 80009 150 1033 00 1OMA HLMP 1401 T 1 T amp R A2FL2 119 4080 00 671 1758 00 671 1758 08 FILTER LOWPASS 80009 119 4080 00 A2FL2 671 4081 00 671 1758 09 FILTER LOWPASS 80009 671 4081 00 A2FL3 119 4080 00 671 1758 00 671 1758 08 FILTER LOWPASS 80009 119 4080 00 A2FL3 671 4081 00 671 1758 09 FILTER LOWPASS 80009 671 4081 00 A2FL4 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL5 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL6 119 4225 00 671 1758 04 FILTER EMI 80009 119 42
71. 12V 9 OUT 9 9 5VA 112 C113 C3 C5 26 28 C30 REF T 0 tuF 0 1uF REF 0 1uF 10uF I 0 tuF 0 1uF A A A A A i T t t 5V L C69 C108 Ribs Te Ves O 1uF 220uF T 0 1u T 0 1u 332 A A DS1 1 0 1uF F 0 1uF CT 0 1uF T 010 F 0 1uUF T T 0 1uF T 0 1uF T T d i i i i i i i POWER DISTRIBUTION AND DECOUPLING Connect to CHASSIS at indicated mounting holes M22 J23 4 M6 M7 1 TP4 TP5 C134 5 a 124 d C125 TP POWER SUPPLY 4 GND 0 001 UF 0 0010 This end of resistor is connected 5 to chassis ground at mtg hole l Tc T 9 D o BEEN A CH A NOTE l and tie together only at this one point star ground l ANALOG GROUND A A A gt gt C6 al C25 L DIGITAL GROUND O 5VA SEE ELECTRICAL PARTS LIST FOR EARLIER VALUES AND ii SERIAL NUMBER RANGES C68 O 15V mE MICROPHONE PREAMP AND POWER DISTRIBUTION ASG 100 2 1 FRONT PANEL BOARD Static Sensitive Devices See Maintenance Section Schematic Diagram lt 7 gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Front Panel Board Assembly A1 Comp Diag Comp Diag Bd No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges 5V R5 100K VOLUME c
72. 2 OHM 196 0 125W TC TO 80009 321 0021 00 A2R76 321 0811 07 RES FXD FILM 56 3 OHM 0 1 0 125W TC T9 80009 321 0811 07 A2R77 322 3239 00 RES FXD FILM 3 01K OHM 1 0 2W TC T0 57668 CRB20 FXE 3 01 A2R78 322 3239 00 RES FXD FILM 3 01K OHM 196 0 2W TC TO 57668 CRB20 FXE 3K01 A2R79 322 3009 00 RES FXD MET FILM 12 1 OHM 196 0 2W TC 100 5 668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R80 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R81 322 3239 00 RES FXD FILM 3 01K OHM 196 0 2W TCZ TO 57668 CRB20 FXE 3K01 A2R82 322 3239 00 RES FXD FILM 3 01K OHM 1 0 2W TC T0 57668 20 3 01 A2R83 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R84 322 3009 00 RES FXD MET FILM 12 1 1 0 2 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R85 322 3222 07 RES FXD FILM 2K OHM 0 1 0 2W 9 80009 322 3222 07 A2R86 322 3222 07 RES FXD FILM 2K OHM 0 1 0 2W 9 80009 322 3222 07 A2R107 322 3193 07 RES FXD FILM 1K OHM 0 1 0 2W TC T9 80009 322 3193 07 2 108 322 3509 07 RES FXD FILM 2 162K 0 1 0 2 19 91637 2 162 TAPED REELED SM BODY A2R109 322 3114 00 RES FXD MET FILM 150 OHM 1 0 2W TC 100 91637 CCF50 2 G1500F PPM AXIAL T amp R SM BODY A2R110 322 3318 00 RES FXD MET FILM 20K OHM 1 0 2W TC 100 57668 CRB20 FXE 20K0 PPM AXIAL T amp R SM BODY A2R111 322 3318 00 RES FXD MET FILM 20K OHM 1 0 2W
73. 25 00 A2FL7 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL8 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL9 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL10 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL11 119 4225 00 671 1758 04 FILTER EM 80009 119 4225 00 A2FL12 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2FL13 119 4225 00 671 1758 04 FILTER EMI 80009 119 4225 00 A2J2 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 3 A2J7 131 0608 00 TERM PIN 0 365 L 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 3 A2J8 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 50 A2J11 131 5230 00 CONN CIRC 80009 131 5230 00 MOUNTING PARTS 213 0055 00 SCR TPG TF 2 32 X 0 188 TYPE B PNH STL 93907 ORDER BY DESCR END MOUNTING PARTS A2J12 131 3987 00 CONN CIRC PCB AUDIO MALE HTANG 3 POS 1 22 82389 H X 1 024 W CTR PLZ LATCHING MOUNTING PARTS 213 0055 00 SCR TPG TF 2 32 X 0 188 B PNH STL 93907 ORDER BY DESCR ASG 100 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number PartNumber Effective Discontinued Name amp Description Code Number END MOUNTING PARTS A2J13 131 5230 00 CONN CIRC 80009 131 5230 00 MOUNTING PARTS 213 0055 00 SCR TPG TF 2 32 X 0 188 TYPE B PNH STL 93907 ORDER BY DESCR END MOUNTING PARTS A2J14 131 3987 00 CONN CIRC PCB AUDIO MALE RTANG 3 POS 1 22 8238
74. 2775mV rms MIC IDENTIFICATION FREQUENCY AMPLITUDE PAUSE AUTO POWER The ASG 100 Audio Signal Generator ASG 100 Service Manual Section 1 INTRODUCTION AND SPECIFICATIONS INTRODUCTION The ASG 100 Audio Signal Generator was developed by Tektronix to meet the audio testing requirements of commercial broadcasting The ASG 100 reduces testing time by transmitting short predefined audio test sequences that produce precise and easily reproduced results in its AUTO mode It can also transmit source identification a voice segment either continually or as part of the AUTO test and user defined tones The user defined tones of LINE UP and MANUAL test signal operation provide the continuous signals needed for adjusting audio levels and manual checking of the left right audio channels AUTOMATIC AUDIO CHANNEL TESTING Test equipment for sound programming and the sound channels of television programming must be capable of quickly checking the audio signal path to make sure of the circuit s quality Automatic equipment must be able to rapidly measure the test signal in ways that give repeatable and meaningful test results To assist in the repeatablity area standard test signal sequences have been defined These sequences begin with the necessary components to start the measurement identify the source of the test signals and identify the stored automatic test that is to be done Then the test signal portion of the sequence runs in prede
75. 3 3 OHM 0 5 0 125W TC T0 RES FXD FILM 200 OHM 0 1 0 2W TC T9 RES FXD FILM 16 2 OHM 1 0 125W TC TO RES FXD FILM 56 3 OHM 0 196 0 125W TC T9 RES FXD FILM 3 01K OHM 196 0 2W TC TO RES FXD FILM 3 01K OHM 196 0 2W TC TO Mfr Code 80009 80009 80009 80009 80009 TK0768 91637 91637 9163 80009 57668 57668 57668 80009 80009 91637 91637 57668 80009 80009 80009 80009 80009 80009 80009 80009 32997 80009 80009 32997 1450 1450 80009 57027 9163 80009 80009 91637 80009 80009 57668 57668 Mfr Part Number 151 0188 00 151 0136 00 151 0235 00 151 0190 00 151 0190 00 VN0106N3 MSP10A01472GD03 MSP10A01472GD03 MSP10A01472GD03 322 3258 00 CRB20 FXE 20K0 CRB20 20 0 CRB20 FXE 20K0 322 3450 00 322 3450 00 CCF501G20002F CCF501G20002F CRB20 FXE 20 0 322 3222 07 322 3222 07 322 3176 00 322 3222 07 322 3222 07 322 3176 00 322 3001 00 322 3201 00 3299W 1 202 322 3001 00 322 3201 00 3299W 1 202 GFOSUT 100K GFO6UT 100K 322 3112 00 RC55 D 6K695 B R 2 162K OHM 321 1611 07 321 1708 01 CCF50 2 C200ROBT 321 0021 00 321 0811 07 CRB20 FXE 3 01 CRB20 FXE 3K01 6 11 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued Name amp Description Code Number A2R39 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T
76. 4 ERE SOUL be 5 2 DIP SVCh ho cp RR e Cte ale oed SUR Root d Edo dps 5 3 Remote Connector e b hi T acusa ioco aee bres 5 8 Digital Signal Processor Diagram 2 5 3 Digital Signal Processor 5 3 Address Decoder 15 od ois UE boo see hats Pe hte owe eee dees 5 4 Control Register Latches v a Ree Es 5 4 EPROM e d ea eas 5 4 DSP ino sie eda Med mos Modica to dci ds den Sd deos es desc C o el 5 4 Battery Backup qum Ax meu yp eed xq ww i ie egi edid 5 5 CODEC ee ee eae Sr 5 5 ASG 100 Service Manual iii Digital to Analog Converter Diagrams 3 and 3 5 5 Digital eee ere US 5 5 Digital to Analog Converters 5 5 LOW Pass Ode enit aA dou d 5 6 Filter Voltage Reference 5 5 6 Channel 1 and Channel 2 Attenuator Diagram 4 5 6 Step Attenuator Se Si ee eae ados 5 6 Attenuati
77. 422 49 R121 K2 8 xx 47uF RE gt 20 0 HEADPHONES JACK MOUNTED ON lt gt FRONT CASTING R166 56 2K gt A 1 J200 15V C41 15V 33pF O NOTE PIN 3 OF J20 NOT U40A C40 U33 INSERTED ON ECB ver 74LS04 0 1uF DBX 2151 1 2 lt 6 VCC PREVIEW Ra GND LIN OUT 3 Sci 1 J200 502 5 R176 SET gt 20 0K S R45 PREV1 135 136 500 R85 PREV2 5 001 001 0 001 HEADPHONES JACK 20 0K MOUNTED ON FRONT CASTING E Q18 R187 20 0K V A C46 U36 DBX 2151 C45 R128 98pF 10 0 n 22 VNO106 U54 7 R191 10 0K 415V RESET 18 6 039 R132 1 7 LF851 100 M AUD LEVEL R133 51 L 2 3 32K 10 EA V 15V SEE ELECTRICAL PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES 1 ANALOG GROUND A ali DIGITAL GROUND P O A2 MAIN BOARD ASG 100 HEADPHONE AMPLIFIER ASG 100 Schematic Diagram lt 6 gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Main Board Assembly A2 Partial Assembly A2 also shown on Dia grams 1 2 3 4 and 5 Comp Diag Comp Diag Bd No Loc Loc No Loc Loc C3 D3 H4 C102 G1 E7 C4 D5 14 105 2 5 D3 H4 C6 D5 14 C106 F4 M4 C7 D3 1 108 C3 H1 C112 C3 M5 C8 D3 K1 C113 C3 M5 C9 J1 C124 H1 C11 2 12 L3 C125 5 C13 E3 I5 C134 D4 N8
78. 4222 SR212A102KAA A2C94 281 0765 00 CAP FXD CER DI 100PF 596 100V 04222 SA102A101JAA A2C95 281 0765 00 CAP FXD CER DI 100PF 596 100V 04222 102 101 2696 281 0765 00 CAP FXD CER DI 100PF 596 100V 04222 5 102 101 A2C97 290 0990 00 CAP FXD ELCTLT 10UF 20 50V 80009 290 0990 00 2098 281 0765 00 CAP FXD CER 100 5 100 04222 SA102A101JAA A2C99 290 0990 00 CAP FXD ELCTLT 10UF 20 50V 80009 290 0990 00 2 100 281 0765 00 DI 100PF 596 100V 04222 SA102A101JAA A2C101 281 0765 00 CAP FXD CER DI 100PF 596 100V 04222 SA102A101JAA A2C102 283 0642 00 CAP FXD MICA DI 33PF 296 500V 0 370 X 0 340 RDL 00853 D105E330G0 A2C103 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C105 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C106 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXiAL T amp R 2 108 290 0944 01 CAP FXD ELCTLT 220UF 20 10V 55680 UVX1C221MPA1T A2C109 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 5 205 104 0 100 AXIAL T amp R A2C110 290 0974 00 CAP FXD ELCTLT 10UF 20 50VDC 55680 UVX1H100MAA A2C111 290 0782 00 CAPFXD ELCTLT 4 7UF 75 2096 35VDC 55680 UVX1V4R7MAA A2C112 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R A2C113 281 0775 02 CAP FXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA
79. 4LS04 DIP14 3 TUBE 80009 156 0385 02 A2U40 156 0645 02 671 1758 04 IC DGTL LSTTL GATES 74LS14 DIP14 3 TUBE 80009 156 0645 02 A2U41 156 3166 00 IC MISC CMOS ANALOG SW DUAL DPST 55 80009 156 3166 00 OHM 15V DG405 DIP16 3 6 16 ASG 100 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number PartNumber Effective Discontinued Name amp Description Code Number A2U42 156 1272 00 IC LIN BIPOLAR OP AMP DUAL HIOUT DRV LOW 80009 156 1272 00 NOISE NE5532N DIP08 3 A2U46 156 2815 00 IC MISC BIPOLAR MISC ANALOG COMPAN 80009 156 2815 00 DOR NE572N DIP16 3 2047 156 1065 00 iC DGTL LSTTL LATCH OCTAL D TRANS 80009 156 1065 00 3 STATE 74LS373 DIP20 3 TUBE A2U48 156 4046 00 IC PROCESSOR CMOS MICROCOMPTR 8 BIT 80009 156 4046 00 16MHZ 256 X 8 ROMLESS 80032 D1P40 6 TUBE MOUNTING PARTS 136 0757 00 SKT DIP 09922 DILB40P 108 MOUNTING PARTS A2U49 160 7392 00 671 1758 00 671 1758 01 IC DGTL CMOS PLD EEPLD 22V10 25NS 33 3MHZ 80009 160 7392 00 90MA 22V 10 25 DIP24 3 A2U49 160 7392 01 671 1758 02 671 1758 03 IC DGTL CMOS PLD EEPLD 22V10 25NS 33 3MHZ 80009 160 7392 01 90MA 22V10 25 DIP24 3 2149 160 7392 02 671 1758 04 6071 1758 04 IC DGTL CMOS PLD EEPLD 22V10 25NS 33 3MHZ 80009 160 7392 02 90MA 22V10 25 DIP24 3 A2U49 160 7392 03 671 1758 05 671 1758 06 IC DGTL CMOS PLD EEPLD 22V10 25NS 33 3MHZ 80009 160 7392 03 90MA 22V 10 25 DIP24 3 A2U49 160 7392 04 671 1758 07 IC DGTL CMOS PLD EEPLD 22V10
80. 5B or 2246 bandwidth difference Stereo Headphones 10 Hz to 20 kHz Check headphone NEM response standard output and auto test stereo phono plug sequences IBM or compatible with terminal software program Low Distortion Oscillator Tektronix AA5001 or Distortion Analyzer Check Adjust signal connector RS 232C serial ASCII communications Check RS 232C serial port and remote operation Serial Communications Terminal with RS 232C interconnection cable Audio Signal Cable 2 required XLR male to triple E Z Hook 5023 24 banana adapter cable Signal connections for frequency and loop through checks Audio Signal Cable 2 required XLR female to triple E Z Hook 5023F 24 banana adapter cable Signal connections for frequency and loop through checks Tektronix Part Number 103 0035 00 BNC male to dual binding post banana adapter Adapter Signal interconnection for channel phase check A Tektronix TM500 power supply is required to power the plug in test equipment ASG 100 Service Manual 4 1 Verification and Adjustment ASG 100 Service Manual VERIFICATION PROCEDURE These verification procedures are designed to be done with the cover of the ASG 100 installed using the normal operating controls only If a verificatio
81. 89 00 PPM AXIAL T amp R SM BODY A2Ri65 322 3385 00 671 1758 02 RES FXD MET FILM 100K OHM 1 0 2W TC 100 57668 CRB20 FXE 100K PPM AXIAL T amp R SM BODY A2R166 322 3265 00 671 1758 00 671 1758 01 RES FXD MET FILM 5 62K OHM 1 0 2W TC 100 80009 322 3265 00 PPM AXIAL T amp R SM BODY A2R166 322 336 1 00 671 1758 02 RES FXD MET FILM 56 2K OHM 196 0 2W TC 100 91637 CCF50 2F56201F PPM AXIAL T amp R SM BODY A2R167 307 1223 00 RES NTWK FXD FI 8 10 OHM 2 0 3W 16 DIP 91637 MDP1603 100G MOUNTING PARTS 136 0971 00 SKT PL IN ELEK DIP 16 PIN 2 X 8 0 3 X 0 1 80009 136 0971 00 SP T G 0 095 H X 0 1 TAIL END MOUNTING PARTS A2R174 322 3193 00 RES FXD MET FILM 1K OHM 1 0 2W TC 100 57668 CRB20 FXE 1K00 PPM AXIAL T amp R SM BODY A2R175 322 3318 00 RES FXD MET FILM 20K 1 0 2 100 57668 CRB20 FXE 20K0 PPM AXIAL T amp R SM BODY A2R176 322 3318 00 RES FXD MET FILM 20K OHM 1 0 2W TC 100 57668 CRB20 FXE 20K0 PPM AXIAL T amp R SM BODY A2R177 307 0542 00 RES NTWK FXD FI 5 10K 5 0 125 01121 106 10 706 103 2 178 307 0542 00 RES NTWK FXD FI 5 10K OHM 5 0 125W 01121 106A1030R706A103 A2R179 322 3289 00 RES FXD MET FILM 10K OHM 1 0 2W TC 100 80009 322 3289 00 PPM AXIAL T amp R SM BODY A2R180 321 0793 07 RES FXD FILM 37 5 OHM 0 1 0 125W TC T9 24546 NE55E37R5B A2R181 322 3009 00 RES FXD MET FILM 12 1 OHM 195 0 2W TC 2100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R182 322 31 26 07 RES FXD FILM 200 OHM 0 1 0 2W TC T9
82. 9 00 322 3193 00 322 3258 00 Serial Assembly Number Effective 671 1758 00 671 1758 02 671 1758 00 671 1758 02 671 1758 00 671 1758 02 671 1758 00 671 1758 00 Replaceable Electrical Parts Discontinued Name amp Description 671 1758 01 671 1758 01 671 1758 01 671 1758 03 671 1758 03 RES FXD MET FILM 10K 1 0 2 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 100K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 150 OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 100 OHM 196 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 20K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 5 62K 1 0 2 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 56 2K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 10K OHM 196 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 100K OHM 196 0 2W 100 PPM AXIAL T amp R SM BODY RES FXD FILM 3 74K OHM 196 0 2W TC TO RES FXD MET FILM 10K OHM 1 0 2W TC 100 PPM AXIAL T amp R SM BODY RES FXD MET FILM 10K OHM 196 0 2W 100 PPM AXIAL T amp R SM BODY RES FXD FILM 3 74K OHM 196 0 2W TC TO RES FXD MET FILM 100K OHM 195 0 2W TC2 100
83. 9 151 0188 00 AMPL 2N3906 TO 92 EBC 204 151 0136 00 XSTR SIG BIPOLAR NPN 40V 700MA 100MHZ 80009 151 0136 00 AMPL 2N3053 TO 39 A2Q5 151 0235 00 XSTR SIG BIPOLAR PNP 80V 1 0A 150MHZ 80009 151 0235 00 AMPL 2N4033 TO 39 206 151 0190 00 XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ 80009 151 0190 00 AMPL 2N3904 TO 92 207 151 0188 00 XSTR SIG BIPOLAR PNP 40V 200MA 250MHZ 80009 151 0188 00 AMPL 2N3906 TO 92 208 151 0136 00 XSTR SIG BIPOLAR NPN 40V 700MA 1t 00MHZ 80009 151 0136 00 AMPL 2N3053 TO 39 A2Q9 151 0235 00 XSTR SIG BIPOLAR PNP 80V 1 0A 150MHZ 80009 151 0235 00 AMPL 2N4033 TO 39 A2Q10 151 0190 00 XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ 80009 151 0190 00 AMPL 2N3904 T0 92 EBC A2Q11 151 0188 00 XSTR SIG BIPOLAR PNP 40V 200MA 250MHZ 80009 151 0188 00 AMPL 2N3906 T0 92 2012 151 0136 00 XSTR SIG BIPOLAR NPN 40V 700MA 100MHZ 80009 151 0136 00 AMPL 2N3053 TO 39 2013 151 0235 00 XSTR SIG BIPOLAR PNP 80V 1 0A 150MHZ 80009 151 0235 00 AMPL 2N4033 T0 39 2014 151 0190 00 XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ 80009 151 0190 00 AMPL 2N3904 TO 92 6 10 ASG 100 Component Tektronix Number A2Q15 2016 2017 2018 2619 2020 A2R1 A2R2 A2R3 A2R5 A2R6 A2R7 A2R13 A2R14 A2R15 A2R16 A2R17 A2R18 A2R19 A2R20 A2R20 A2R21 A2R22 A2R22 A2R23 A2R23 A2R24 A2R25 A2R25 A2R26 A2R27 A2R28 A2R29 A2R30 A2R31 A2R32 A2R33 A2R34 A2R35 A2R36 A2R37 A2R38 ASG 100 Part Numbe
84. 9 E3MRA H X 1 024 W CTR PLZ LATCHING MOUNTING PARTS 213 0055 00 SCR TPG TF 2 32 X 0 188 TYPE B PNH STL 93907 ORDER BY DESCR END MOUNTING PARTS A2J20 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 3 A2J23 131 5227 00 CONN HDR PWR 80009 131 5227 00 A2J25 131 3520 00 CONN HDR 53387 2510 6002UB A2J26 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 2 A2J28 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 12 A2J29 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 2 A2J30 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 18 A2J31 131 5228 00 671 1758 00 671 1758 05 CONN DIN PCB MALE STR 2 X 32 0 1CTR 0 457H 80009 131 5228 00 X 0 114 TAIL ROWS amp C LOADED A2J32 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 12 2 2 148 0235 00 80009 148 0235 00 2 5 148 0235 00 RELAY ARM 80009 148 0235 00 211 108 0543 00 671 1758 04 COIL RF FIXED 1 1UH TK1345 108 0543 00 A2L2 108 0543 00 671 1758 04 COIL RF FIXED 1 1UH 1345 108 0543 00 A2L3 108 0543 00 671 1758 04 COIL RF FIXED 1 1UH TK1345 108 0543 00 A2P2 131 0993 00 CONN BOX SHUNT SHORTING FEM STR 1X2 0 1 22526 65474 006 CTR 0 385 H 30 GLD BLK JUMPER A2Q2 151 0190 00 XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ 80009 151 0190 00 AMPL 2N3904 TO 92 EBC A2Q3 151 0188 00 XSTR SIG BIPOLAR PNP 40V 200MA 250MHZ 8000
85. 91637 CCF50 2 C200ROBT A2R183 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R184 322 3126 07 RES FXD FILM 200 OHM 0 1 0 2W TC T9 91637 CCF50 2 C200ROBT A2R185 321 0793 07 RES FXD FILM 37 5 OHM 0 1 0 125W TC T9 24546 55 37858 A2R186 322 3318 00 RES FXD MET FILM 20K OHM 1 0 2W TC 100 57668 CRB20 FXE 20K0 PPM AXIAL T amp R SM BODY A2R187 322 33 18 00 RES FXD MET FILM 20K OHM 1 0 2W TCz 100 57668 CRB20 FXE 20K0 PPM AXIAL T amp R SM BODY A2R188 322 3147 00 RES FXD MET FILM 332 OHM 1 0 2W TC 100 80009 322 3147 00 PPM AXIAL T amp R SM BODY A2R189 322 3258 00 RES FXD MET FILM 4 75K OHM 1 0 2W TC 100 80009 322 3258 00 PPM AXIAL T amp R SM BODY A2R190 322 3289 00 671 1758 00 671 1758 03 RES FXD MET FILM 10K OHM 1 0 2W TC 100 80009 322 3289 00 PPM AXIAL T amp R SM BODY A2R191 322 3289 00 671 1758 04 RES FXD MET FILM 10K OHM 1 0 2W TC 100 80009 322 3289 00 PPM AXIAL T amp R SM BODY A2R192 322 3114 00 671 1758 01 RES FXD MET FILM 150 OHM 195 0 2W TC 100 91637 CCF50 2 G1500F PPM AXIAL T amp R SM BODY 251 260 2544 00 SW RKR SPST 10 PIN PIANO DIP 80009 260 2544 00 6 14 ASG 100 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number PartNumber Effective Discontinued Name amp Description Code Number A2TP1 214 4085 00 TERM TEST PT 0 070 1D 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2TP2 214 4085 00 TERM TES
86. A205C104MAA 283 0599 00 SA205C104MAA D105E330G0 SA205C104MAA ASG 100 Number A2C43 2045 A2C46 A2C47 A2048 2 49 2 51 2 52 2 53 2 54 2 55 2 56 2 57 2 59 2 60 2 61 A2C62 A2C63 2 64 A2C65 2 66 A2C67 A2C68 A2C69 A2C70 2 71 2 72 2077 A2C78 A2C79 A2C80 A2C81 A2C82 A2C83 A2C84 A2CB5 A2C86 A2C87 ASG 100 Part Number 290 0848 00 283 0599 00 281 0775 02 283 0642 00 281 0775 02 290 0848 00 290 0990 00 281 0775 02 290 0848 00 290 0973 00 281 0775 02 290 0778 00 281 0765 00 290 0891 00 290 0891 00 290 0974 00 290 0891 00 290 0891 00 290 0974 00 283 0167 00 290 0974 00 281 0775 02 281 0775 02 281 0775 02 290 0891 00 281 0819 00 281 0819 00 290 0950 00 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 Serial Assembly Number Effective 671 1758 00 Replaceable Electrical Parts Discontinued Name amp Description 671 1758 03 CAP FXD ALUM 47UF 100 20 1 6V 0 681 X 0 414 RDL CAP FXD MICA DI 98PF 596 500V CAP FXD CER MLC 0 1 UF 2096 50V X7R 0 265 X 0 100 AXIAL CAP FXD MICA 33 2 500 0 370 X 0 340 RDL CAP FXD CER MLC O 1UF 2096 50V X7R 0 265 X 0 100 AXIAL T amp R 470 100 20 16V 0 681 X 0 414 RDL
87. Bu to 24 dBu The frequency argument sets a new frequency from 10 Hz to 20 kHz The query returns the present level for the tone test signals silence silence Sends silence on the output signal lines The query replies that there are no variables for the silence command tone k evef t frequency tone Sends the tone signal to both channels The level argument sets the new signal level from 90 dBu to 24 dBu The frequency argument sets a new frequency from 10 Hz to 20 kHz The query returns the present level for the tone test signals voi lu voi lu Sends the recorded voice id alternately with the line up signal The query returns the present line up level which is also the voice level voice voice Sends the recorded voice id The query returns the present line up level which is also the voice level Sends the selected multi tone signal 1 2 3 or 4 to the right channel The level argument sets the new signal level from 90 dBu to 24 dBu Remote Operation ASG 100 Service Manual Table A 4 Special Queries display Returns the present display text Returns the LED or LEDs that are on NOTE If an auto sequence is on it is aborted version Returns the front panel controller firmware version number and date the version was created Table A 5 Control Signals control C Restarts the ASG 100 and restores the default front panel settings either factory or user selected as determined by the setti
88. C137 F4 H4 C14 F3 142 B3 F7 C15 F3 J6 C16 F3 J5 DS1 C4 H1 C25 E5 H7 C26 E3 H7 J7 B2 F6 J23 B4 H2 C27 E5 H6 C28 E3 H6 R134 C2 29 5 H7 R135 C2 F7 C30 5 136 B2 F6 C52 G2 F7 R137 B2 F6 R138 C2 F7 C53 C2 E7 C54 B2 E6 140 1 F8 C55 G2 F7 R141 F2 G7 C56 C2 F7 R142 F1 F8 C57 C2 F7 R143 G1 F8 R144 D2 G8 C59 F1 F8 C60 F2 G7 R145 E2 G8 C61 F1 E8 188 l1 C62 D2 G8 C63 D2 G8 TP1 C4 B6 TP2 C4 E7 C64 E2 G7 TP3 C4 G4 C65 D2 G8 C66 E2 G7 4 4 L2 C67 B3 12 5 4 18 68 5 6 4 7 69 12 U7 D3 H4 C70 G2 F8 U8 D5 H4 C79 D4 46 042 2 80 L6 C81 17 U42B C2 F7 U46A E2 G7 C82 E4 L7 U68 C3 M5 C83 E4 L6 C84 E4 L5 VR3 B2 F6 C85 E4 K5 VR4 G1 G7 C86 FA l6 VR5 G2 G7 C87 F3 W1 4 B8 C88 G3 K4 W123 D4 B4 89 G3 L3 See parts list for earlier values and serial number ranges C F PREAMP AND AGC 15V C59 d R140 15 4K LL C57 4 3V R136 2 21K R137 C53 221K 47uF VR5 ZN J2 e 4 3V FRONT 7 GIN ES PANEL 1V rms BOARD aad C56 REN 55 c 6 RECIN R141 uF C63 R144 1 00K 5532 1 10 0 4 R138 10 0K C65 2 RECAP gt T 6 is C64 THDTRM voc O 15V 10uF TRKTRM GND gt A C66 A 15V 67 C142 T 100UF a A A U68 07 78L12A 78L05 IN OUT O
89. CONDUCTOR CORP BOURNS INC TRIMPOT DIV OMRON ELECTRONICS INC MURATA ERIE NORTH AMERICA INC HEADQUARTERS AND GEORGIA OPERATIONS MINNESOTA MINING MFG CO MATSUSHITA ELECTRIC CORP OF AMERICA TDK ELECTRONICS CORP NICHICON AMERICA CORP INTERNATIONAL RESISTIVE PRODUCTS INC ROHM CORP STACKPOLE CORP THE TEKTRONIX INC EAGLE PICHER INDUSTRIES INC ELECTRONICS DIV SWITCHCRAFT INC SUB OF RAYTHEON CO SEASTROM MFG CO INC AUGAT IPD DALE ELECTRONICS INC TEXTRON INC DIV RUBBER TECK INC SUPERTEX INC ZMAN amp ASSOCIATES TOKYO COSMOS ELECTRIC CO LTD TDK CORPORATION OF AMERICA Address SANGAMO RD PO BOX 128 1201 S 2ND ST 19TH AVE SOUTH P O BOX 867 11901 MADISON AVE 600 W JOHN ST 2850 MT PLEASANT AVE RICHARDS AVE 4350 BELTWOOD PKWY SOUTH 857 OLD TRAIL RD 267 LOWELL ROAD 550 HIGH ST 6 KINSEY PLACE 2900 SEMICONDUCTOR DR 1200 COLUMBIA AVE 2200 LAKE PARK DR PO BOX 2963 ONE PANASONIC WAY PO BOX 1501 12 HARBOR PARK DR 927 E STATE PKY 4222 S STAPLES 8 WHATNEY PO BOX 19515 201 STACKPOLE ST 14150 SW KARL BRAUN DR PO BOX 500 COUPLES DEPT C AND PORTER STS PO BOX 47 5555 N ELSTRON AVE 701 SONORA AVE 452 JOHN DIETSCH BLVD PO BOX 2510 2064 12TH AVE PO BOX 609 600 18TH AVE 19115 HAMILTON AVE PO BOX 389 1225 BORDEAUX DRIVE 2 268 SOBUDAI ZAWA 2055 GATEWAY PLACE SUITE 200 City State Zip Code PICKENS SC 29671 9716 MILWAUKEE WI 53204 2410 MYRTLE BEACH SC 29577 CLE
90. Consumption RS 232C Interface Baud Rates Maximum Applied Voltage Signals Levels Connector Output Signal Frequency Range Multitone Resolution Accuracy Output Signal Amplitude Range Accuracy Resolution Flatness 0399909 and below 040000 and above 100 to 240 Vac 47 Hz to 440 Hz Full range no selector 20 W Typical 1200 2400 4800 and 9600 factory default Front panel selection only no switch settings for baud rate except the factory default of 9600 RXD received data TXD transmitted data and GND are used for serial remote contro of the ASG 100 RTS and CTS not used in the ASG 100 Pins 4 6 and 9 of the connector are not to be connected to the terminal interconnec tion cable Those pins are used for contact closure remote control 25 peak Compatible with RS 232C DB 9 DTE terminal communications device Requires a null modem for connection to a another DTE device 10 Hz to 20 kHz See Table 1 2 1 Hz 0 1 96 Output is approximately 0 17 dB lower with a 600 Q load and is 6 dB lower with internal 600 source resistance and a 600 Q load 90 dBu to 24 dBu 24 5 uV to 12 2 Vins balanced into a load resistance of 10 kQ or greater with 12 Q source resistance 0 2 dB at 1 kHz from 24 dBu to 80 dBu into a load resistance of 10 or greater Multitone signal com
91. ED PARTS 150 1253 00 DIO OPTO DSPL GRN 5BY7 8 DIG 80009 150 1253 00 I CMOS RAM ASCII DCDR HDSP 2113 671 1758 00 B010100 B010107 CIRCUIT BD ASSY MAIN 80009 671 1758 00 671 1758 01 B010108 B010123 CIRCUIT BD ASSY MAIN 80009 671 1758 01 671 1758 02 010124 010231 CIRCUIT BD ASSY MAIN 80009 671 1758 02 671 1758 03 8010232 010409 CIRCUIT BD ASSY MAIN 80009 671 1758 03 671 1758 04 010410 020649 CIRCUIT BD ASSY MAIN 80009 671 1758 04 671 1758 05 020650 031031 CIRCUIT ASSY MAIN 80009 671 1758 05 671 1758 06 031032 8031126 CIRCUIT ASSY MAIN 80009 671 1758 06 671 1758 07 B031127 B031760 CIRCUIT BD ASSY MAIN 80009 671 1758 07 671 1758 08 B031761 B039999 CIRCUIT BD ASSY MAIN 80009 671 1758 08 671 1758 09 B040000 CIRCUIT BD ASSY MAIN 80009 671 1758 09 146 0049 00 BTRY STORAGE 3 5V 50MAH 81855 LIC 7F 281 0775 02 CAP FXD CER MLC O 1UF 2096 50V X7R 0 265 X 04222 SA205C104MAA 0 100 AXIAL T amp R 281 0775 02 CAPFXD CER MLC 0 1UF 20 50V X7R 0 265 X 04222 SA205C104MAA 6 5 Replaceable Electrical Parts Component Tektronix Number A2C5 A2C6 A2C7 A2C8 A2C9 A2C11 2 12 A2C13 A2C14 A2C15 A2C16 A2C21 A2C22 A2023 A2C24 A2C25 A2C26 A2C27 A2C28 A2C29 A2C30 A2C31 A2C32 2034 A2C35 A2C36 A2C37 2038 2039 A2C40 A2C41 A2C42 6 6 Part Number 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775 02 281 0775
92. L 198 6 SEV IEC 127 1 7 Section 2 OPERATION AND SETUP ASG 100 Front Panel Menu Map Records Alternately sends voice voice identifier and lineup identitier Sweep R Sweep L Sweep then current sweep level amplitude If editing is enabled this setting can be changed using the arrow keys to select the digit and the digit value If a Save is done on the edited item it is saved as the default setting If a Save is not done any edits made are in effect only until the next power on To end an editing session press any main level test selection button ASG 100 Service Manual Figure 2 1 ASG 100 Menu Map Displays current Multitone fest amplitude ON LINE SILENCE VOICE AUTO LINEUP MANUAL Sends Selects Selects Selects AUTO Selects Selects selected silence voice test and LINE UP MANUAL test signal identifier displays fest and displays name of the name of the selected VA N the selected test sequence test signal v Use up down 5339 FREQUENCY AM Cere up down arrow buttons arrow buttons to select test to select test sequence Displays visa signal current current line up line up frequency amplitude Tone 033 00V Polarity 0 33 01 1 0 33 01V IDENTIFICATION AMPLITUDE MTone2 0 33 02 MTone3 O 33 03V 0 33 0 33 04 0 33 04 4 character Displays Displays n d 0 33 05 id
93. L LSTTL SHIFT 80009 156 0651 02 RGSTR 74LS164 DIP14 3 TUBE A2U19 156 0651 02 IC DGTL LSTTL SHIFT 80009 156 0651 02 RGSTR 74LS164 DIP14 3 TUBE A2U20 156 4043 00 IC LIN BIPOLAR OP AMP 40MHZ UNITY GAIN 80009 156 4043 00 STABLE LOW OFFSET AD841KN DIP14 3 2021 156 4043 00 IC LIN BIPOLAR OP AMP 40MHZ UNITY GAIN 80009 156 4043 00 STABLE LOW OFFSET AD841KN DIP14 3 A2U22 156 1270 00 5 MUX 8 CHANNEL 850 80009 156 1270 00 OHM 1 6US LF13508 DIP16 3 A2U23 156 1272 00 IC LIN BIPOLAR OP AMP DUAL HI OUT DRVLOW 80009 156 1272 00 NOISE NE5532N DIP08 3 A2U25 156 1211 00 IC MISC BIFET ANALOG 80009 156 1211 00 SW QUAD LF13333 DIP16 3 A2U27 156 1245 00 IC LIN 80009 156 1245 00 A2U28 156 1270 00 IC MISC BIFET ANALOG MUX 8 CHANNEL 850 80009 156 1270 00 OHM 1 6US L F13508 DIP16 3 A2U29 156 1272 00 IC LIN BIPOLAR OP AMP DUAL HI OUT DRVLOW 80009 156 1272 00 NOISE NE5532N DIP08 3 A2U33 156 3098 00 IC MISC BIPOLAR MISC DBX NOISE REDUCTION 80009 156 3098 00 SYS CONT AMP UPC1252HA2 SIP8 2035 156 1272 00 IC LIN BIPOLAR OP AMP DUAL HI OUT DRVLOW 80009 156 1272 00 NOISE NE5532N DIP08 3 A2U36 156 3098 00 MISC BIPOLAR MISC DBX NOISE REDUCTION 80009 156 3098 00 SYS CONT AMP UPC1252HA2 SIP8 A2U38 156 1272 00 IC LIN BIPOLAR OP AMP DUAL HI OUT DRV LOW 80009 156 1272 00 NOISE NE5532N DIP08 3 A2U39 156 1149 00 IC LIN BIFET OP AMP LF351N DIP08 3 27014 LF351N GLEA134 A2U40 156 0385 02 671 1758 00 671 1758 03 IC DGTL LSTTL GATES 7
94. N RS 232C remote control is disabled PROG4 PROG5 and MODB MODA Factory settings Do not change for normal operation Editing may be enabled via the remote connector by using contact closure to connect 6 and 9 of the rear panel remote control connector While the pins are connected the disables are overridden Edits and saves may then be done to make the needed change s When the contacts are opened editing is again controlled the settings of switches PROG1 PROG3 P With PROG6 PROG7 both down the contact closure remote operation for sending an AUTO TEST sequence and enabling editing when editing is internally disabled are still operational Figure 2 6 DIP switch settings for editing 2 14 ASG 100 Service Manual Operation and Setup Editing Signal Parameters After you enable editing of a signal parameter you can adjust that parameter value from the front panel To edit a signal parameter press the front panel buttons required to display the current value For example to edit the frequency of the line up tone press the LINE UP button and then the FREQUENCY button The digit currently active for editing is indicated by a blinking character numeral or underscore To change the active digit use the amp and gt buttons To change the value of the active digit press either the or button to increment or decrement the value until you get the desired character or number Saving Sig
95. NGES P O A2 MAIN BOARD DIGITAL TO ANALOG CONVERTER 671 1758 08 amp BELOW ASG 100 Schematic Diagram lt 4 gt Component Locator Chart The schematic diagram has an alphanumeric grid to assist in locating parts within that diagram Main Board Assembly A2 Partial Assembly A2 also shown on Diagrams 1 2 3 5 and 6 Comp Diag Bd Comp Diag Comp Diag Bd Comp Diag Bd No Loc Loc No Loc Loc No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges CTRL 0 15 010 ANALOG GROUND DIGITAL GROUND SEE ELECTRICAL PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES P O A2 MAIN BOARD ASG 100 027 1413 adu x 415V CTRL3 1 IN1 D1 16 CH1 an CHASSIS GND hemt 3 2 02 2 Nota a NS 08 Dig 2 U25D in 180pF 13 LF13333 5 1 P12 DIS 5 D5 qe Ii R68 1S U25A 1831015 6 pit tle LINE s E 9 C126 3 pA m o CLAMP O 5V 5 oO 2 E 15 a i P n67 CH CH A 1 00K P l 0 dB 040 FL5 n 1 2 ETT 15V TRLI2 REVEN gt IOE 15V PREVIEW NOTE IN 16 PIN SOCKET P CTRL4 A i 15V MARKED SPARE 1 p 3 IN1 3 LEFT C96 100 R37 2 E P 3 01K T C127 Y CH 1 IN
96. NH STL MOUNTING PARTS POWER SUPPLY SWITCHING AUTO IN 85 264VAC 47 440HZ OUT 5VDC 5A 15V 2A 15V 0 5A SEE A3 REPL MOUNTING PARTS SCR ASSEM WSHR 4 40 X 0 312 PNH STL END MOUNTING PARTS SHIELD ELEC POWER SUPPLY PAD CUSHIONING 0 05 SQ X 0 23 H POLYURETHANE W PRESSURE SENS ADHESIVE FILTER RFI 3A 250VAC 50 60HZ SEE FL100 REPL MOUNTING PARTS SCREWMACHINE 4 40 X 0 375 PNH STL NUT PL ASSEM WA 4 40 X 0 25 STL CD PL END MOUNTING PARTS CA ASSY SPELEC 18 AWG 3 3 L 8 0 CA ASSY SP ELEC 18 AWG 3 3 L 8 9 LEAD ELECTRICAL 18 AWG 2 5 L 5 4 MOUNTING PARTS SCR ASSEM WSHR 4 40 X 0 312 PNH STL SCREW MACHINE 6 32 X 0 250 PNH STL CDPL END MOUNTING PARTS CA ASSY SP ELEC 10 28 AWG 9 25 L SEE A4J1 REPL MOUNTING PARTS SCREW JACK 4 40 X 0 312 EXT THD 4 40 INT THD 0 188 HEX STEEL CAD PLATE PAD CUSHIONING 0 05 SQ X 0 23 H POLYURETHANE PRESSURE SENS ADHESIVE COVER BOTTOM ALUMINUM ASG100 COVER BOTTOM ALUMINUM ASG100 COVER BOTTOM ALUMINUM ASG100 Mfr Code 80009 93907 80009 93907 80009 0858 80009 80009 93907 0858 0858 80009 52152 93007 78189 80009 80009 80009 0858 52152 80009 80009 80009 200 38 0 00 ORDER DESCR 426 2420 00 ORDER BY DESCR 366 2167 00 211 0244 00 333 3881 00 337 3749 00 ORDER DESCR 211 0244 00 211 0244 00 337 3738 00 5 5018 ORDERBY DESCR 211 041800 00 174 2495 00 174
97. O1uF 0 180 15V 150 Q13 SS 15V R71 R78 2 162 3 01K 4 15V 194 R81 3 01K ons 15V 550 R73 R167E 133 3 12 5 CH2PHO R74 RIG Ales 200 B L2 RIGHT _ 1 1uH 47 10UT 1 2 R75 STEP RIGHT OUTPUT BUFFER EE 16 2 10 1 1PHO 4 ATTENUATOR 2520720 IS A T durs 18 J33 36 9 9 BUFFER 10 15V 15V CH 5 R183 13 12 1 CTRL8 14 15 16 2PHO 17 R184 R185 18 200 37 5 20UT 199 20 gt CHANNEL 1 AND CHANNEL 2 GAIN ATTENUATOR ASG 100 Schematic Diagram lt 5 gt Component Locator Chart The schematic diagram has an alpha numeric grid to assist in locating parts within that diagram Main Board Assembly A2 Partial Assembly A2 also shown on Dia grams 1 2 3 4 and 6 Comp Diag Comp Diag Bd No Loc Loc No Loc Loc See parts list for earlier values and serial number ranges C101 100pF R115 R163 56 2K 54 K5 3 100 0K 15V O U35A 5532 C43 R112 R117 47uF 20 0K lt gt 100 0K R164 EFF B010409 amp BELOW 56 2K HEADPHONES JACK MOUNTED ON 15V FRONT CASTING J200 25 HEADPHONE AMPLIFIER C135 on 001 T 001 100pF y R165 lt gt 100 0K CH2PHO gt 010410 THRU 032
98. PUT 5VA 02 Q4 5 ll NOTE R167 16 SOCKET 5 1 R176 MARKED ACTIVE CH CH e rue CTRL 15 PREVI R167A 9 180pF 5 i i 1 gt 0 dBu 1097 6 143 167 OUT 9421 12 Toa R39 T 10 100pF A 410 2 00K 4 R46 V CH 1 OUTPUT 6 695K 2 00 180 b Q5 15V R31 R38 2 2 162K 3 01K 5 15V A R41 3 01K R32 15 4 R33 52 17 R167C 133 3 R44 di 4 12 1 5 7 bs gt gt gt U23B R43 153 200 A 5532 3 LEFT cw 55 OA as STEP 772 ATTENUATOR R42 as R36 3 01K 1 1 47 56 3 15 1 15V jn 12 1 R182 R180 U25B LF13333 esc 180pF 13 33 R108 gt 015 7 10 R107 10 dB A 1 00K 1 2 15V AUDIO CTRL8 A el 15V NOTE THIS R NETWORK IS ACTUALLY A 2 RIGHT 98 16 HEADER A SOCKET 100pF prr MARKED USER 4 pu 3 01K Y CH 2 INPUT CH 5VA En Q12 us 175 CTRL9 C37 rL10 T PREV gt R167G 180pF R80 10 10 75 CH i wn U13 1 C99 6 2 2 10uF 143 8 1 167 a L R79 2 V T 100pF 12 1 bun lt lt gt 7 NZ be Bx i 2 R Fut V CH 2 OUTPUT 6 695K
99. R149 U52 U51 Y 5 J30 Schematic Diagram lt 1 gt Component Locator Chart Main Board Assembly A2 Partial Assembly A2 also shown on Diagrams 2 3 4 6 Bd Loc Diag No Loc Comp Diag Comp Loc Loc Diag Loc C Loc omp Diag Loc Comp Loc 062 914 Diag Loc 000 1618 Loc See parts list for ear lier values and serial number ranges 5 741504 DDR5 ADDR6 DATA6 DATA7 gt RESETA 5V J28 O 1 1 Sa 2 72 3 4 L 4 R177 5 5 2 10 iu 2 55 TEST 5 FRONT PANEL PROCE R ONLY 5278 9 5V a 11 1 EEE 2 lt gt 3 STITI 4 R178 AEA ADDRIO an Jlf 5 10K DA _____ DATAIO 7 ADDRIO 2 Ui Ui DIP lo MM MODA gt 01 123 MODB U1 121 15V R174 047 7415373 100K 2 ADDRO 048 DATAT 4 5 ADDR XUD LEVEL 80C32T2 1 6 ADDR2 P1 0 ADO PO 0 e 9 C103 Rens DATA4 13 ADDR Sie ee P 1 1 DATAS 14 15 ADDR5 IN ADDRO AROE DATAG 17 16 ADDR6 1 1 3 ADS PO 3 18 109 ADDR7 I ADDR2 MER 15V ADDR4 14 P16 AD6 PO 6 RD 15
100. SSY MAIN 80009 671 1758 07 2 671 1758 08 031761 039999 CIRCUIT BD ASSY MAIN 80009 671 1758 08 A2 671 1758 09 B040000 CIRCUIT BD ASSY MAIN 80009 671 1758 09 A3 119 4112 00 POWER SUPPLY SWING AUTO IN 85 264VAC 80009 119 4112 00 47 440HZ OUT 5VDC 5A 15V 2 15V 0 5A A4 671 2106 00 CIRCUIT BD ASSY SERIAL FILTER 80009 671 2106 00 1 671 1763 00 CIRCUIT BD ASSY FRONT PANEL 80009 67 1 1763 00 1 1 281 0775 01 CAP FXD CER MCL 0 1UF 20 50V Z5U 0 170 X 04222 5 105 104 0 100 AX AL A1C2 281 0775 01 CAP FXD CER MCL 0 1UF 20 50V Z5U 0 170 X 04222 SA105E104MAA 0 100 AXIAL A1C3 290 1271 00 CAP FXD ALUM 3300UF 20 10V 0 492 X 1 575 AX 80009 290 1271 00 IAL BULK 1051 150 1259 00 DIO OPTO LED YEL 585NM 3 0VF 80009 150 1259 00 10MA HLMP 1819 A1DS2 150 1258 00 DIO OPTO LED GRN 569NM 3 0VF 80009 150 1258 00 10MA HLMP 1840 A1J1 174 2266 00 ASSY SP ELEC RBN IDC 50 28 AWG 3 0L 2X25 80009 174 2266 00 PCB 2X25 RCPT 0 1 CTR ACCOM 0 025 SQ PIN 142 131 0608 00 TERM PIN 0 365 L X 0 025 BRZ GLD PL 80009 131 0608 00 QUANTITY 2 A1MK1 119 4087 00 MICROPHONE 80009 119 4087 00 1 1 307 0542 00 RES NTWK FXD FI 5 10K 5 0 125 01121 106A1030R706A103 A1R2 307 0542 00 RES NTWK FXD FI 5 10K OHM 596 0 125W 01121 106A1030R706A103 A1R3 307 0594 00 RES NTWK FXD FI 8 220 OHM 2 0 125W 80009 307 0594 00 A1R4 307 0542 00 RES NTWK FXD F 5 10K OHM 5 0 125W 01121 106A1030R706A103 A1R5 311 2482 00 RES VAR NONWW 100K OHM 20 0 25 W LIN 80
101. Service Manual Tektronix ASG 100 Audio Signal Generator 070 6546 03 Warning The servicing instructions are for use by qualified personnel only To avoid personal injury do not perform any servicing unless you are qualified to do so Refer to all safety summaries prior to performing service 4 Copyright Tektronix Inc All rights reserved Printed in U S A Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specifications and price change privileges reserved The following are registered trademarks TEKTRONIX and For further information contact Tektronix Inc Corporate Offices P O Box 1000 Wilsonville OR 97070 1000 U S A Phone 503 627 7111 TL X 192825 TWX 910 467 8708 Cable TEK WSGT Tektronix Television Division participates in the Broadcast Professionals Forum BPFORUM on the CompuServe Information Service Press releases on new products product specific newsletters application information and technical papers are among the types of information uploaded Additionally product specialists from Tektronix will be line to answer questions regarding product applications operation and maintenance Instructions for accessing the information on CompuServe can be found in the current Tektronix Television Products Catalog CompuServe access is currently available in
102. Standard This is to alert you to the possibility of levels that could overload or damage equipment Whenever this LED is blinking the signal level is increased in tenth dBu steps only when you raise the level using the front panel controls It may be decreased normally Display Window The ASG 100 lets you set a number of parameters affecting the signal it generates Using the panel controls you can specify the parameter you want to check or modify The display window shows the current signal pattern for whatever signal parameter you last chose When you select the RECORD function the window also displays instructions for inputting a four second voice pattern When you power up the ASG 100 the display window shows the name of the default automatic test sequence either the factory default of O 33 01 or a user selected automatic test sequence Headphones The HEADPHONES port outputs whatever signal is currently being output through the external output ports If the ASG 100 is ON LINE this is the signal pattern currently selected on the ASG 100 If it is off line it is the program signal being looped through the ASG 100 The VOLUME knob controls the level of the signal through this port It has no effect on the signal level through the ASG 100 It is possible to set levels and adjust the volume so the output through the headphones is excessively loud For safety use minimum volume level setting when making level adjustments 2 11
103. T 0 070 10 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2TP3 214 4085 00 TERM TEST PT 0 070 10 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 0 032 BRS W RED NYL CLR A2TP4 214 4085 00 TERM TEST 0 070 1D 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2TP5 214 4085 00 TERM TEST PT 0 070 1D 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2TP6 214 4085 00 TERM TEST 0 070 1D 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2TP7 214 4085 00 TERM TEST PT 0 070 10 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 0 032 BRS W RED NYL CLR A2TP8 214 4085 00 TERM TEST PT 0 070 10 0 220 H 0 063 DIA 26364 104 01 02 PCB 0 015 X 0 032 BRS W RED NYL CLR A2U1 156 6157 00 671 1758 00 671 1758 07 IC PROCESSOR CMOS DSP 24 BITS 20MHZ 512 X 80009 156 6157 00 24 RAM DSP56001 CQFP132 A2U1 156 6157 01 671 1758 08 DSP56001 ON ADAPTER A2U2 160 7395 00 671 1758 00 671 1758 00 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7395 00 8 250 5 27 512 28 6 A2U2 160 7395 01 671 1758 01 671 1758 01 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7395 01 8 250NS 27C512 DIP28 6 A2U2 160 7395 02 671 1758 02 671 1758 04 MICROCKT DGTL CMOS EPROM 64K X 80009 160 7395 02 8 25NS 27C512 DIP28 6 A2U2 160 7395 03 671 1758 05 671 1758 05 4 IC DGTL CMOS EPROM 64K X 80009 160 7395 03 8 25 5 270512 28 6 A2U2 160 7395 04 671 1758 06 IC DGTL CMOS EPROM 64K X 80009 160 7395 04 8 25NS
104. TAL SIGNAL PROCESSOR Diagram 2 Digital Signal Processor DSP Address and Data Buses The address and data buses of U1 are not multiplexed The DSP has a 16 bit address bus 0 15 and a 24 bit data bus DO D23 Three 8 bit EPROM devices are stacked to provide the 24 bit firmware to the DSP A set of three pull up resistor packs R1 R2 are connected to the data bus to pull the data lines high when the lines are not being driven Host Port PBO PB14 The data handled by this port on PBO PB7 is 8 bits wide and 8 bytes deep It allows communication between the DSP and the control processor without the need to do bus request bus grant data handling This port is mainly used to handshake control signals between the front panel processor and the DSP Addressing of the 8 bytes of DSP to write is done by ADDR 0 2 from the control processor The DSP uses the interrupt INTO to generate an interrupt to the control processor Serial Ports PCO PC8 There are two serial ports Pins PCO PC1 TXD and PC2 SCLK are unused but are available on J310 for testing and future expansion Serial communications via the remote connector is handled by the front panel processor The remaining pins PC3 PC8 are a synchronous serial port Output bits from this port are used to drive the data 5 3 Theory of Operation ASG 100 Service Manual formatter synchronizer that shifts digital data to align it properly for the digital to analo
105. UP signal or the frequency of the MANUAL function signals of Tone and Polarity there is no single frequency associated with Multitones To display the signal frequency press either the LINE UP button to view the LINE UP signal frequency or the MANUAL button to view the Tone or Polarity signal frequency When viewing a MANUAL signal use the or buttons to display the Tone or Polarity functions then press the FREQUENCY button All the Tone signals Tone R Tone and L Tone are set to the same frequency but the LINE UP signal and the Tone signals are separately settable NOTE The Polarity signal is the sum two equal amplitude sine waves One has a fundamental frequency of 440 Hz the displayed frequency for Polarity and the other is the second harmonic of that frequency 880 Hz The Polarity signal frequency is not editable If the DIP switches are set to allow editing you can change the signal frequency of the LINE UP or MANUAL Tone signals using the Arrow Buttons The frequency of the tone signal may also be changed remotely as an argument to asking for the Tone signal via the serial interface For information on enabling editing refer to Internal Settings and Setup Editing For more information on adjusting values using the arrow buttons refer to Arrow Buttons AMPLITUDE The AMPLITUDE control displays the amplitude of the tone generated by the LINE UP function the MANUAL Tone function the MANUAL Polarity function To displa
106. VELAND OH 44101 HICKSVILLE NY 11802 BURLINGTON A 52601 NORWALK CT 06852 DALLAS TX 75244 ETTERS 17319 HUDSON NH 03051 BRADFORD 16701 3737 DENVILLE NJ 07834 2611 SANTA CLARA 95051 0606 RIVERSIDE CA 92507 2114 SUNNYVALE CA SMYRNA GA 30080 AUSTIN TX 78769 2963 SECAUCUS NJ 07094 2917 PORT WASHINGTON NY 11550 SCHAUMBURG IL 60195 4526 CORPUS CHRISTI TX 78411 2702 IRVINE CA 92713 ST MARYS PA 15857 1401 BEAVERTON OR 97077 0001 JOPLIN 64801 CHICAGO IL 60630 1314 GLENDALE CA 91201 2431 ATTLEBORO FALLS MA 02763 COLUMBUS NE 68601 3632 ROCKFORD IL 61108 5181 GARDENA CA 90247 SUNNYVALE CA 94086 KANAGAWA 228 JAPAN SAN JOSE CA 95110 6 3 Replaceable Electrical Parts Component Tektronix Serial Assembly Number Mfr Mfr Part Number Part Number Effective Discontinued amp Description Code Number A1 671 1763 00 CIRCUIT BD ASSY FRONT PANEL 80009 671 1763 00 2 671 1758 00 010100 010107 CIRCUIT BD ASSY MAIN 80009 671 1758 00 A2 671 1758 01 B010108 B010123 CIRCUIT BD ASSY MAIN 80009 671 1758 01 2 671 1758 02 010124 010231 CIRCUIT BD ASSY MAIN 80009 671 1758 02 2 671 1758 03 010232 010409 CIRCUIT ASSY MAIN 80009 671 1758 03 2 671 1758 04 010410 020649 CIRCUIT BD ASSY MAIN 80009 671 1758 04 A2 671 1758 05 B020650 B031031 CIRCUIT BD ASSY MAIN 80009 671 1758 05 A2 671 1758 06 031032 B031126 CIRCUIT BD ASSY MAIN 80009 671 1758 06 A2 671 1758 07 B031127 B031760 CIRCUIT BD A
107. Video Timing Control 4 8 13 Check AUTO Test 0 33 and Tek Sequences and AUTO TEST LVL Operation 4 8 14 Check AUTO Test Sweep and SweepLev Operation 4 8 15 Check Remote Operation 4 9 Adjustment Procedure 4 10 Preparation ud LA a AVS Ow Ch we past poene pi ele 4 10 Procedures ooa ea adio em Ss Se ele oe ee 4 10 1 Check Supply 4 10 eee ee 4 11 3 Adjust Distortion RE Vu dod 4 11 Section 5 Theory of Operation Control Processor Diagram 1 5 1 Front Panel Processor E MENU au b ge bred o duele 5 1 Reset Circuit U54 and Inverting Buffer 5 1 Address Latch Address Data 5 1 eae ee 5 2 EPROM ouod sub a dovete wa ee dosi guide Cee 5 2 Battery Backup cep deba Padres add 5 2 Address Decoder unes ss t CR E Od wer EASE SR RERUM E ee eee 5 2 Front Panel Interface 6 34
108. a character the character blinks off and on indicating you can edit it When editing the alphanumeric encoded IDENTIFICATION the character to edit must be explicitly selected to be controlled by the and buttons When editing a number value the selected digit to edit will increment and decrement the total value of the displayed value not just the digit column selected If editing is not enabled there will be no flashing digit or space in the display PAUSE AUTO During an AUTO test signal sequence pressing the button pauses the sequence at the signal step the ASG 100 is generating at that moment For example suppose you press the PAUSE AUTO button during the step of the 33 sequence when the ASG 100 is generating a tone of 80 Hz at 12 dB The ASG 100 will continue generating that tone rather than progressing to the next step in the sequence Once you have paused the test sequence you can increment it one step at a time by pressing the 1 button You can decrement the sequence by pressing the button You increment to the last test in the sequence or decrement to the first test in a sequence but you cannot step the test sequence offline To resume automatic generation of the rest of the test sequence press the PAUSE AUTO button a second time Operation and Setup ASG 100 Service Manual SAVE If SAVE is pressed when saving is not enabled the word Disabled will be displayed If the SAVE function is e
109. ack is the toutput and pin 3 red is the output of the ASG 100 SET Distortion Analyzer Input Range AUTO RANGE Function THD N Response RMS Filters 30 kHz LOW PASS or AUDIO BAND PASS Set the ASG 100 MANUAL test signal to L Tone and press ON LINE to turn on the test signal Adjust the Left Channel MSB potentiometer R28 for minimum THD reading lt 0 01 Press ON LINE to turn off the test signal ON LINE LED off Verification and Adjustment ASG 100 Service Manual Disconnect the XLR connector from the Audio Out Left connector and move it to the Audio Out Right connector Set the ASG 100 MANUAL test signal to R Tone and press ON LINE to turn on the test signal Adjust the Right Channel MSB potentiometer R27 for minimum THD reading lt 0 01 Press LINE to turn off the test signal ON LINE LED off and disconnect the test equipment from the ASG 100 Section 5 THEORY OF OPERATION CONTROL PROCESSOR Diagram 1 Front Panel Processor The front panel processor monitors the front panel buttons lights the LED indicators as appropriate produces the character displays in the display window handles the serial interface processing and commands the DSP processor to generate the requested signal or sequence The processor is a special purpose microprocessor with built in RAM and bit manipulation registers The built in RAM can be programmed to operate the processor without the need to have further bus accessed
110. additional damage Periodic checks of the transistors and integrated circuits are not recommended The best measure of performance is the actual operation of the component in the circuit 3 3 Maintenance ASG 100 Service Manual STATIC SENSITIVE COMPONENTS This instrument contains electrical components that are susceptible to damage from static discharge Static voltages 1 kV to 30 kV are common in unprotected environments Table 3 2 shows the relative static discharge susceptibility of various semiconductor classes Table 3 2 Static Susceptibility a Voltage equivalent for levels voltage discharged from a 100 pF capacitor through 1000 resistance Observe the following precautions to avoid damage 1 Minimize handling of static sensitive components 2 Transport and store static sensitive components or assemblies in their original containers on a metal rail or on conductive foam Label any package that contains static sensitive components or assemblies 3 Discharge the static voltage from your body by wearing a wrist grounding strap while handling these components Servicing static sensitive assemblies or components should be done only at a static free work station by qualified personnel 4 Nothing capable of generating or holding a static charge should be allowed on the work station surface Keep the component leads shorted together whenever possible Pick up the components by the body never by the le
111. ads Do not slide the components over any surface C Avoid handling components areas that a floor or work surface covering capable of generating a static charge 9 Use a soldering iron that is connected to earth ground 10 Use only special antistatic suction or wick type desoldering tools 3 4 ASG 100 Service Manual Maintenance TROUBLESHOOTING The material contained here is general and is not intended to cover specific cases Note that the manual itself is considered a troubleshooting aid and as such a brief discussion of its contents is in order Troubleshooting Aids Foldout Pages The foldout pages at the back of the manual contain information that is useful in troubleshooting the instrument Schematic diagrams circuit board illustrations and parts locating charts are found there Diagrams Schematic diagrams are the most often used troubleshooting aids The circuit number and electrical value of each component is shown on the diagram The first page has definitions of the symbology used on the schematic diagrams Refer to the Replaceable Electrical Parts list for a complete description of each component Circuits that are mounted on circuit boards or assemblies are enclosed in a border with the name and assembly number shown on the border NOTE Check the Change Information section in the rear of the manual for corrections and modifications to the instrument and the manual Board Illust
112. al regulators U69 and U70 CHANNEL 1 AND CHANNEL 2 ATTENUATOR Diagram 4 Step Attenuators 5 6 From the output of U13 the signal is applied to a stepped attenuator U22 left 1728 right The right channel circuitry is discussed the left channel is identical The signal enters at CH2 It is AC coupled through C99 to remove any DC offset that might be present in the buffer amplifier The time constant of the AC coupling is very long and the capacitor does not affect the lower audio frequencies Attenuation Range Steps The attenuation is done by a string of resistors to ground Each step or tap of the attenuator is 10 dB lower than the previous step and there are five steps making the lowest step of the attenuator at 50 dB Multiplexer U28 selects the various taps of the attenuator under software control Operator selection of a dBu range causes the software to locate the appropriate attenuator tap and switch the multiplexer to that tap There are two additional taps on the step attenuators On U22 the left channel step attenuator pin 9 has a signal line that sends the output of the right channel step attenuator to the left channel In effect the left channel of U22 has the same signal as the right channel and everything works off of the right channel DAC When a stereo signal is required for a stereo test sequence separate channel signals are generated The multiplexer selects between 51 and 58 for output depending on
113. all flat bit screwdriver to pry gently on both ends of connector J8 the large ribbon cable to the front panel to disengage the connector from the main board mating pins 3 Turn the instrument over and remove the two POZIDRIV screws that hold the front panel assembly to the chassis 4 Ifyou wish to further disassemble the front panel board assembly remove the four POZIDRIV screws holding the circuit board to the front panel ring The circuit board may then be separated from the ring 5 Remove the 1 2 inch retaining nut and washer on the headphone jack and the volume control knob to separate the front panel from the front panel circuit board A 1 16 inch Allen wrench is needed to loosen the retaining screw in the volume control knob To reinstall the front panel assembly use the following procedure 1 Reassemble the front panel to the front panel circuit board Reinstall the retainer nut on the headphone connector and the volume control knob 2 Insert the assembled front panel and front panel circuit board into the front panel ring and reinstall the four holding screws Make sure that the headphone connector ground lug is connected to the front panel ring by the holding screw near that connector 3 Position the front panel assembly on the front of the chassis and reinstall the two holding screws on the bottom side of the chassis Start both screws then tighten firmly Do not over tighten Main Board Removal and Replacement 1 Remo
114. amp R SM BODY A2R40 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R41 322 3239 00 RES FXD FILM 3 01K OHM 196 0 2W TC TO 57668 CRB20 3 01 2 42 322 3239 00 RES FXD FILM 3 01K OHM 1 0 2W TC T0 57668 CRB20 FXE 3K01 A2R43 322 3009 00 RES FXD MET FILM 12 1 1 0 2 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R44 322 3009 00 RES FXD MET FILM 12 1 OHM 1 0 2W TC 100 57668 CRB20FXE475E PPM AXIAL T amp R SM BODY A2R45 322 3222 07 RES FXD FILM 2K OHM 0 1 0 2W TC T9 80009 322 3222 07 A2R46 322 3222 07 RES FXD FILM 2K OHM 0 1 0 2W TC T9 80009 322 3222 07 A2R66 322 3226 00 RES FXD MET FILM 2 21K OHM 196 0 2W TC 100 57668 CRB20 FXE 2K21 PPM AXIAL T amp R SM BODY A2R67 322 3193 07 RES FXD FILM 1K OHM 0 196 0 2W TCz T9 80009 322 3193 07 A2R68 322 3509 07 RES FXD FILM 2 162K OHM 0 195 0 2W TC T9 91637 2 162K OHM TAPED amp REELED SM BODY A2R69 322 3112 00 RES FXD FILM 143 OHM 196 0 2W TC TO 80009 322 3112 00 A2R70 321 1762 07 RES FXD FILM 6 695K OHM 0 1 0 125W TC T9 57027 RC55 D 6K695 B R A2R71 322 3509 07 RES FXD FILM 2 162K OHM 0 1 0 2W TC T9 91637 2 162K OHM TAPED amp REELED SM BODY A2R72 321 1611 07 RES FXD FILM 550 OHM 0 1 0 125W TC T9 80009 321 1611 07 A2R73 321 1708 01 RES FXD FILM 133 3 OHM 0 5 0 125W TC TO 80009 321 1708 01 A2R74 322 3126 07 RES FXD FILM 200 0 1 0 2 9 91637 CCF50 2 C200ROBT A2R75 321 0021 00 RES FXD FILM 16
115. ard A3 would be listed in the Replaceable Electrical Parts list as 117 Maintenance ASG 100 Service Manual NOTE Always consult the parts list for part numbers and descriptions when ordering replacement parts Some parts may have been replaced or have a different part number in an individual instrument Also check the Change Information at the back of the manual for the most recent changes Replaceable Mechanical Parts This list is arranged so that it corresponds to the exploded view drawing for major instrument components Standard Accessories which are included in the parts list are also included in the exploded view drawing Major Assembly Interconnection Signals and power supply voltages are passed through the instrument by a system of interconnecting cables The connector holders on these cables have numbers that identify terminal connectors numerals used are from 2 up A triangular key symbol is used to identify pin 1 on the circuit board to assist in aligning connectors with correct square pins General Troubleshooting Techniques 3 6 The following procedure is designed to assist in isolating problems which in turn expedites repairs and minimizes down time 1 Ensure that the malfunction actually exists This is done making sure that the instrument is operating as intended by Tektronix Determine and evaluate all trouble symptoms This is accomplished by isolating the problem to a general area such as an
116. at the same time resets the ASG 100 and restores the enabled defaults factory or user This is the same action that occurs when control is sent to the ASG 100 via the RS 232C serial port Once the ASG 100 baud rate has been set to a different choice the device communicating with the ASG 100 must also be set to that same baud rate or be able to auto baud to communicate with the ASG 100 If the baud rate selected matches the baud rate expected by the device that the ASG 100 is sending to the remote display will print out the DSP Firmware version number the DSP diagnostics version number and the the FP Controller version number If nothing is seen either the serial communication path is not connected or the baud rate is incorrect If only garbled ascii characters are seen try another baud rate REMOTE OPERATION Once installation is complete when you power on the ASG 100 the screen of the remote terminal transcripts the self test the ASG 100 performs then displays the following prompt ASG100 f p gt When this prompt is displayed you can enter the remote commands Any command that is not understood will cause the error line Unrecognized command to appear Other error messages appear when arguments to the command are not within limits or errors in the syntax of the arguments are found The RS 232C interface of the ASG 100 permits only one command per line and a command line is terminated by a carriage return If the comma
117. at will put it on line or change its state if it is on line NOTE If an auto sequence is in progress the auto sequence is aborted if any communication is received during the test sequence This includes asking the ASG 100 what its present state is third special query version returns the front panel controller firmware version and the date it was generated This query is provided because any version related firmware questions that arise may be more easily addressed when the installed version is known Restoring Defaults The remote commands with arguments change the setup from the power on setup To restore the power on state either the factory defaults or the user selected settings whichever is enabled type control C This restarts the ASG 100 and restores the power on control settings Flow Control 12 The ASG 100 responds to ON X OFF software flow control When a control is received for X OFF the ASG 100 stops sending on its serial port When a control Q is received for X ON serial communications is resumed If there is a message pending from the ASG 100 it is sent Only the first message is queued for output During the time communication is off incoming commands are processed but not echoed ASG 100 Service Manual Remote Operation REMOTE COMMAND SYNTAX The commands offline silence voice lineup and voi lu take no arguments and perform the requested operation just as from the front panel The remote
118. attery above 212 F 100 C incinerate or expose the contents to water If you replace the ASG 100 lithium battery dispose of the old battery as required by local state and federal agencies NOTE Typically small quantities of the battery less than 20 can be safely disposed of with ordinary garbage in a sanitary landfill Larger quantities must be sent by surface transport to a hazardous waste disposal facility The batteries should be individually packaged to prevent shorting Then pack them into a sturdy container that is clearly labeled as follows Lithium Batteries DO NOT OPEN Battery Emergency and First Aid Information Manufacturer Eagle Picher Battery Type Lithium In case of emergency follow the instructions in Table 3 1 below ASG 100 Service Manual 3 1 Maintenance ASG 100 Service Manual Table 3 1 Emergency Procedures for Contact with Lithium Battery Contents Wash promptly with plenty of water Eyes Flush immediately with plenty of water and use an emergency eye wash if available Report to a medical professional for treatment Inhalation Leave the area and get fresh air Report to a medical professional for treatment Non toxic according to laboratory testing However report to a medical professional for advice In case of venting clear the immediate area Venting will usually last only a few seconds FUSE The power supply for the ASG 140 is internally fused Refer all internal ser
119. atures are disabled internally they may be enabled via the rear panel REMOTE connector This method of operation permits editing from the front panel when needed without having to remove the installed equipment to access the side panel and internal switches Editing is enabled by connecting pins 4 and 6 of the Remote connector together This connection may be made via a jumper switch or remote controlled relay contact If activation of the AUTO test sequence using external contact closures is a part of your normal operation you may also want to add the Remote Edit enable capability If the need to change a programmed frequency amplitude or ID etc arises the feature can be enabled the edit made by the on site operator and then disabled again When the connection between pin 4 and pin 6 15 removed the settings of internal dip switches again control the state of the editing and saving function for the AUTO LINE UP and MANUAL test settings Note however that the settings that were edited will now be in effect for the remainder of the test session If those edits were also SAVED they will be in effect when the ASG 100 is again turned on Front panel editing may not be enabled via the RS 232C serial commands However even with front panel editing disabled the remote command arguments for editing still function ASG 100 Service Manual Operation and Setup NOTE There is no remote command for saving an edit to make it a new default so at t
120. bly A2 Partial Assembly A2 also shown on Diagrams 1 3 4 5 and 6 Comp Diag Loc The schematic dia gram has an alphanu meric grid to assist in locating parts within that diagram Bd Loc Bd Loc Comp No Diag Loc Comp No Diag Loc Bd Loc Comp No Bd Loc Diag Loc See parts list for earlier values and serial num ber ranges DATA O 7 U48 ADDR O 2 U47 U49 14 U49 18 R158 51 11 51 12 049 17 5V ws 4 gt lt ll Il ADDR 18 432 2 VCC GND SF DATAO J30 CO 4 Op O1 2 FOR TEST ONLY DSP 1 1 PB2 H2 PB3 H3 PB4 H4 ADDRO NDATAS LITT DATA4 DATAS T DATAG hit i TT 5 5 PB6 H6 7 7 PB8 HAO PB9 HA1 10 2 U1 56001 CQFP PB11 HR W PB13 HREQ PB14 HACK PCO RXD PC1 TXD 3e R192 150 OUT ANALOG GROUND DIGITAL GROUND SEE ELECTRICAL PARTS LIST FOR EARLIER VALUES AND SERIAL NUMBER RANGES Fone wan sonn ASG 100 PC2 SCLK PC3 SCO PC4 SC1 PC5 SC2 6 5 PC7 SRD PC8 STD MODA IRQA MODB IRQB RESET XTAL EXTAL BR VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC GND GND GND GND GND GND GND GND GND GND GND GND GND GND NC NC NC NC NC NC NC NC NC NC NC AAN 82
121. cation Following is an example of the indentation system used to indicate relationship 1 2 3 4 5 amp Description Assembly and or Component Mounting parts for Assembly and or Component MOUNTING PARTS END MOUNTING PARTS Detail Part of Assembly and or Component Mounting parts for Detail Part MOUNTING PARTS END MOUNTING PARTS Parts of Detail Part Mounting parts for Parts of Detail Part MOUNTING PARTS END MOUNTING PARTS Mounting Parts always appear in the same indentation as the Item it mounts while the detail parts are indented to the right Indented items are part of and included with the next higher indentation Mounting parts must be purchased separately unless otherwise specified Indicates the code number of the actual manufacturer of the part Code to name and address cross reference can be found immediately after this page Indicates actual manufacturer s part number REV AUG 1993 ASG 100 Mir Code 52152 54583 71468 78189 80009 93907 0858 1373 5 100 Replaceable Mechanical Part CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Manufacturer MINNESOTA MINING AND MFG CO INDUSTRIAL SPECIALTIES DIV TDK ELECTRONICS CORP ITT CANNON DIV OF ITT CORP ILLINOIS TOOL WORKS INC SHAKEPROOF DIV TEKTRONIX INC TEXTRON INC CAMCAR DIV STAUFFER SUPPLY CO DIST PATELEC CEM ITALY Address 3M CENTER 12 HARBOR PARK DR 666 E DYER RD ST CHARLES ROAD 14150 SW
122. ce EPROM EPROM U63 stores the program memory The processor gets it operating instructions from this memory device The EPROM has a 16 bit address bus and an 8 bit data bus When factory defaults are selected the state of the instrument on power up is restored from data stored 1n this device Battery Backup Level Monitor U62 checks the 5 V line If the voltage on this line is more that 0 3 V above battery voltage the power for operating the static RAM is supplied from the 5 V line If the 5 V line voltage drops low enough U62 disables the chip select to the RAM and supplies the holding power for memory from the battery When data is to be accessed by the processor the NVRCE chip select is generated via address decoder U49 Until power comes up to the correct operating level the chip select is disabled through U62 Address Decoder The PAL address decoder 149 decodes ADDR8 through ADDR15 plus RESETA PSEN RD and WR to generate the control signals that address the individual devices on the processor s bus Decoded Signals SWOEN and SWIEN enable switch buffers U51 and U52 when the processors scans the front panel for switch activity HPCHEN and HPFLEN are used to control the LED alphanumeric display device U1 on the front panel LEDCLK controls clocking the data about which LED is to be lit into the LED buffer 050 DSPEN DSPRST and DSPWR are used to control communication between the f
123. circuit number appears the diagrams and circuit board illustrations located in the diagrams section Assembly numbers are also marked on each diagram and circuit board illustration in the Diagram section and on the mechanical exploded views in the mechanical parts list The component number is obtained by adding the assembly number prefix to the circuit number Example a Component Number A23R1234 A23 R1234 Assembly Number A Circuit Number Read Resistor 1234 of Assembly 23 Example b Component Number 2 2 12 2 1234 3 M M Circuit Assembly Number Subassembly Number Number Read Resistor 1234 of Subassembly 2 of Assembly 23 The electrical parts list is arranged by assemblies in numerical sequence with its subassemblies and parts precedes 2 with its subassemblies and parts Mechanical subparts to the circuit boards are listed in the electrical parts list These mechanical subparts are listed with their associated electrical part for example fuse holder follows fuse Chassis mounted parts and cable assemblies have no assembly number prefix and are located at the end of the electrical parts list Indicates part number to be used when ordering replacement part from Tektronix Column three 3 indicates the serial or assembly number at which the part was first used Column four 4 indicates the serial or assembly number at which the part was removed No serial or assembly number entered in
124. cy of 440 Hz and the current level setting of the manual polarity signals The level argument specifies a desired amplitude for the polarity test tone Enter the initial characters of this argument literally as shown Specify level as a number representing the amplitude in dBu You can specify values to tenths of a decibel for example 5 3 Do not add extra numbers after the tenths error in the level argument specifying a level outside the legal range or incorrect syntax will result in an error message being generated if help is on If you want to specify a negative amplitude you must prefix the value with a minus sign for example 4 Otherwise the value is assumed to be positive You can also explicitly specify a positive amplitude with a plus sign prefix for example 6 A change in the level applies to all the polarity signals There is no frequency argument for polarity The polarity testing signal is composed of two equal amplitude sine waves of 440 Hz and 880 Hz and frequency changes are not permitted Attempting to send a frequency argument to polarity will result in an error message being generated if help is on rl mtone 1121314 I eve The lt 1121314 gt remote commands makes the ASG 100 send the selected multi tone signal at the currently selected amplitude through both channels The rmtone 1 4 and Imtone 1 4 versions of this command send the selected test multi tone through the
125. d LINE UP test to known settings and leave the MANUAL test editable for setting levels and frequencies that may be needed for manual testing Your application will determine how you decide to customize the test signals and the freedom of operation for the user Table 2 1 shows the present assignment of all the switches of the DIP switch package and the factory setting of each switch 2 15 Operation and Setup ASG 100 Service Manual Table 2 1 Dip Switch Functions Switch Action Switch Factory Name Setting Prog 0 At power up ASG 100 recalls factory settings for all functions At power up ASG 100 recalls values last saved with the SAVE button for user definable functions Prog 1 MANUAL functions can be edited MANUAL functions can NOT be edited Prog 2 LINE UP function can be edited LINE UP function can NOT be edited Prog3 AUTO TEST Level and SOURCE ID can can be edited NOT be edited Up MOD Factory setting required for correct Up performance DO NOT CHANGE MODA Factory setting required for correct Up performance DO NOT CHANGE As shipped from the factory the factory default settings are stored in the memory reserved for custom settings This means that when you use the ASG 100 for the first time the factory defaults will be used even if DIP switch 1 is in the DOWN user defined settings enabled position External Edit Enable 2 16 When the editing fe
126. d Setup ASG 100 Service Manual sounds made within several feet of the microphone but for best recording results speak directly into the microphone recording a VOICE identification When RECORD is started the front panel controls are disabled until the recording has finished Upon finishing the front panel state returns to the state in effect when the recording session was started except ON LINE NOTE If the ASG 100 is ON LINE when a recording session is started it is switched off line it remains off line until ON LINE is again selected either locally or remotely AUTO 2 4 The AUTO function generates the currently selected automatic predefined test signal sequence such as CCITT O 33 and TEK or one of the Sweep signals when ON LINE Auto Test Level During off line you may display the test level to which the amplitudes of the tones of the CCITT O 33 and Tek AUTO test sequences are referenced For the 33 and test sequences the actual output levels in dBm0 of the ASG 100 test signals equals the sum of the test level and the step levels specified in Appendix B Test Sequences For example the first step of the 0 33 test sequence is specified at 12 dBm0 However if the test level is set to be 4 0 dBu the actual output level of this signal will be C12 4 8 0 dBm0 test level can be set from a minimum of 6 dBu to a maximum of 14 dBu The factory default test level is 0 dBu This level is one that is
127. deo Timing Control a b Set the ASG 100 for MANUAL Tone of 400 Hz Listen to the signal in the headphones and ground pin 1 of the rear panel remote connector Check that the output signal turns off when pin 1 is grounded Unground pin 1 of the remote connector and check that the signal turns on again Check AUTO Test 0 33 and Tek Sequences and AUTO TEST LVL Operation a Set the ASG 100 for the 0 33 01 Auto Test NOTE If the editing is disabled you will not be able to make edits to the frequency or test levels and the word Disabled appears when the SAVE button is pressed The SAVE feature must be enabled to perform this check Press IDENTIFICATION and edit the displayed text to a new ID Press AUTO again to return to the 0 33 01 display and press and hold the Amplitude button The message TEST Lev should be displayed Release the button Check that the TEST Lev maximum value is 14 0 dBu and its minimum value is 6 0 dBu Edit the TEST Lev to 1 dBu Press the AUTO button to return to the top of the menu then press the SAVE button Saved message should appear Reset the ASG 100 by pressing the left and right arrow buttons at the same time Check that the ASG 100 initializes with the 0 33 01 test displayed in the readout window that the TEST Lev is 1 dBu and that the Identification is as set in part b Press the ON LINE button and listen in the headphones for the test sequence to occur
128. dicates part 1s good for all serial numbers item name 15 separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identification The mechanical subparts are shown as PARTS AT TACHED PARTS or MOUNTING PARTS END MOUNTING PARTS in column five 5 Indicates the code number of the actual manufacturer of the part Code to name and address cross reference can be found immediately after this page Indicates actual manufacturer s part number ASG 100 Mfr Code 00853 01121 04222 05397 05828 07716 09922 0 9 22526 24165 24546 26364 27014 32997 54361 51406 53387 54473 54583 55680 57027 57668 78488 80009 81855 82389 86928 91506 91637 93907 98159 0768 1345 TK1450 TK2058 ASG 100 Replaceable Electrical Parts CROSS INDEX MFR CODE NUMBER TO MANUFACTURER Manufacturer SANGAMO WESTON INC COMPONENTS DIV ALLEN BRADLEY CO INDUSTRIAL CONTROL PRODUCTS AVX CERAMICS DIV OF AVX CORP UNION CARBIDE CORP MATERIALS SYSTEMS DIV GENERAL INSTRUMENT CORP GOVERNMENT SYSTEMS DIV TRW INC TRW IRC FIXED RESISTORS BURLINGTON BURNDY CORP DALLAS SEMICONDUCTOR CORP BERG ELECTRONICS INC DUPONT SPRAGUE ELECTRIC CO DALE ELECTRONICS VISHAY INTERTECHNOLOGY INC CO COMPONENTS CORP NATIONAL SEMI
129. e Line Up signal MANUAL The MANUAL function offers Tone Polarity and Multitone signals Each of these has right and left channel only choices The factory default option is Tone To choose one of the other options press either the up arrow button or down arrow button until the desired test name appears in the display window Left and right channel signals are selected using the left right arrow buttons The first press of a left or right arrow button selects the left or right channel test signal If a left or right channel test signal is selected pressing the opposite arrow returns to stereo test signal second press then selects the opposite channel test signal see Figure 2 3 2 5 Operation and Setup ASG 100 Service Manual 2 6 5 4 gt SAVE D O DJ DJ O Left Channel Both Channels Right Channel L Tone Tone R Tone L Polar Polarity R Polar L 1 MTone1 R MTone1 L MTone2 MTone2 R MTone2 L MTone3 MTone3 R MTone3 L MTone4 4 R 4 Figure 2 3 Manual test signal selection using arrow keys Tone Tests The Tone functions Tone L Tone and R Tone generates a single continuous sine wave tone at a specified frequency and level If a tone choice is displayed you can display the frequency or amplitude of the tone by pressing the FREQUENCY or AMPLITUDE button If editing is enabled you can then edit the value using the arrow buttons For information on enabling editing refer to
130. e ASG 100 is shipped from the factory with 10 Q resistors in these circuits 5 Q in each half because they are paralleled That resistance is in series with 0 8 Q in the EMI filters on each differential output line so the overall output impedance is 12 Q Resistor arrays R168 and R173 are sets of 600 Q resistors If the application needs 600 Q output impedance instead of 12 Q the 600 resistor arrays are used to configure the ASG 100 for 600 Q output impedance Custom output impedances may be made for other applications see Section 2 Operation and Setup for more information on output impedance Relay Driver Output Switching Relays After passing through the output load resistors the differential signal goes to a set of relays K2 on the right channel K5 on the left With the relay enabled the generated signal is connected to the output jacks J14 on the right channel With the relay disabled the audio on 713 is routed directly to the output at J14 5 7 Theory of Operation ASG 100 Service Manual In broadcasting much of the time the program signal is routed straight through the ASG 100 the signal generated by the ASG 100 is not used To perform a test the user touches the ON LINE button Relays energize and re route the output to the signal generator circuitry rather than to the incoming program signal The test or tones the ASG 100 has been configured to send are then sent on the audio signal line If the tone being sent
131. ecause of the nature of the testing being done when using one of the Manual Test signals For information on enabling or disabling editing refer to Internal Settings and Setup Editing For more information on adjusting amplitude values refer to the AMPLITUDE control description Manual Test Frequency You can display the frequency of the manual signals by pressing the FREQUENCY button when a manual test name is displayed The frequency of the polarity signal is preset at the factory to at 440 Hz and cannot be changed and there is no frequency indication for Multitone signals You can edit the frequency of the Tone tests Tone R Tone and L Tone using the arrow buttons when editing is enabled For information on enabling editing refer to Internal Settings and Setup Editing For more information on adjusting the signal frequency refer to the FREQUENCY control description VOLUME MIC The VOLUME knob controls the level of the audio output through the headphones It does not affect the level of the signal output through the other signal ports To increase the volume turn the knob clockwise Microphone When you enable the RECORD function the microphone picks up 4 seconds of sound made in the vicinity of the ASG 100 Automatic gain control is built into the microphone circuit You can then make the ASG 100 replay the recorded sound pattern either repeatedly with the VOICE function or at the beginning of one of the standard test signal
132. egulations Complies with EMC provision of Radiocommunications Act per the following standard s AN NZS 2064 1 2 AN NZS 3548 Information Technology Equipment 1995 Meets the intent of Directive 89 336 E EC for Electromagnetic Compatibility when it is used with the product s stated in the specifications table Refer to the EMC specification published for the stated products May not meet the intent of the directive if used with other products Industrial S cientific and Medical Equipment 1992 Emissions comply with FCC Code of Federal Regulations 47 Part 15 Subpart B Class A Limits Compliance was demonstrated to the following specification as listed in the Official ournal of the European Union Low Voltage Directive 73 23 EEC amended by 93 69 EEC EN 61010 1 1993 Safety requirements for electrical equipment for measurement control and laboratory use UL3111 1 UL1244 Standard for electrical measuring and test equipment Standard for electrical and electronic measuring and testing equipment CAN CSA C22 2 No 231 CSA safety requirements for electrical and electronic measuring and test equipment IEC61010 1 5 afety requirements for electrical equipment for measurement control and laboratory use Terminals on this product may have different installation overvoltage category designations The installation categories are CAT III Distribution level mains usually permanently connected Equipment at this level
133. eld office or representative before continuing If the repair is minor see the parts list for replacement information ASG 100 Service Manual Maintenance Power On Diagnostics When you power on the ASG 100 it performs a numbered series of tests of its memories and their interconnections and then tests the backup battery The display window shows the number of each test as the ASG 100 performs it in the format shown below DSP 1 4 2 4 3 4 4 4 The sequence of messages above indicates the ASG 100 is performing the self tests The 2 4 and 3 4 test normally occur too quickly to be seen in the display The tests performed are described in Table 3 3 Table 3 3 Self Diagnostic Tests When it completes the numbered tests the ASG 100 tests its backup battery A status message is displayed if the battery is not good If the ASG 100 fails one of the numbered self tests it keeps trying to perform that test and displaying its number When the ASG 100 indicates a failed test you cannot make it perform its other functions Contact your Tektronix representative for service information After repeated iterations the unit may pass a test it failed initially and proceed to the next test in the sequence However you should still stop using the unit and have it serviced CORRECTIVE MAINTENANCE NOTE Repair should not be attempted by the customer during the warranty period Obtaining Replacement Parts Replacement
134. entifier Dis current tone current plays TEK 90 0 33 and then current frequency amplitude Use left right TEK 90V AUTO test test level arrow buttons TEK 91 sequences amplitude Potarity to select TEK 91V Polarity Potarity hannel TEK 92V 9 Displays Displays ioe preset current TEK 94V polarity test polarity test TEK 95 Displays frequency amplitude TEK 95V SweepLev 2 1 Operation and Setup ASG 100 Service Manual MAINS VOLTAGE Plug the power cord into the outlet for any voltage source between 100 and 240 volts You do not need to make any adjustments on the ASG 100 to accommodate different source voltages in the rated operating range Various power cord options are available to match the ac various international AC mains The power cord supplied with the ASG 100 is as ordered from the factory See Section 1 Introduction and Specification for the power cord options FREEDOM OF OPERATION The user definable states of the ASG 100 may be totally accessible or set to preselected setups that can not be accidentally altered in normal use As shipped from the factory the total range of user definable features are available Once the application needs are determined and programmed the editing feature may be selectively disabled to prevent accidental changes the frequency and output levels of the test signal Refer to Internal Settings and Setup Editing for information on enabling and disabling the
135. er s output is the plus polarity side of the CH2 differential output Inverting amplifiers U23B and 96 09 left negative and U29B and 914 917 right negative provide the negative side of the differential audio signal to the CH1 and CH2 output connectors Again on the right channel at the output of the first buffer R85 applies the plus polarity output signal to U29B pin 6 the inverting input pin where it is inverted with unity gain For example a 1 peak positive going sine wave out of the first buffer produces 1 peak negative going sine wave at the output of the second buffer Together the two buffers produce the differential audio signal outputs Gain Switching The feedback for the output buffer goes through either of two FET switches U25B or C When U25C is closed U25B open unity feedback goes from pin 10 to pin 11 of the multiplexer The output of the buffer is connected to the summing node making it a unity gain buffer When U25C is open U25B closed the feedback is divided by R108 and R107 causing the gain to increase by 10 dB because it is a non inverting amplifier the gain increases by 2 162 plus 1 or 10 dB This gain is switched in for outputs above 14 dBu Output Impedance Resistor Arrays The differential output signal from the right output buffer is sent through a resistor array R167 G and H for the plus and E and F for the minus polarity These resistors provide the output impedance for the ASG 100 Th
136. f this argument f literally as shown Specify frequency as an positive integer number representing the desired frequency in Hertz n error in the frequency argument a number outside the legal range or bad syntax will result in an error message being generated if help is on The level argument specifies a desired amplitude for the manual test tone Enter the initial characters of this argument 1 literally as shown Specify level as a number representing the amplitude in dBu You can specify values to tenths of a decibel for example 5 3 Do not add extra numbers after the tenths An error in the argument specifying a number outside the legal range or incorrect syntax will result in an error message being generated if help is on If you want to specify a negative amplitude you must prefix the value with a minus sign for example 4 Otherwise the value is assumed to be positive You can also explicitly specify a positive amplitude with a plus sign prefix for example 6 change in the level applies to all the tone signals ASG 100 Service Manual Remote Operation ril polr l evef The polr remote command with no argument makes the ASG 100 send the polarity tone at the currently selected level through both channels The rpolr and Ipolr versions of this command send the polarity tone through the right and left channels respectively query of any of the polarity commands in the form of polr returns the fixed frequen
137. fault values used when the ASG 100 is powered on The DIP resistor package that sets the output impedance of the ASG 100 located in the socket labeled R167 Information on setting the output impedance is found in this section of the manual Enabling and Disabling Signal Editing On the ASG 100 circuit board is a DIP switch you can set to enable or disable editing of ASG 100 functions and to select the type of values used as the defaults for user definable functions As you face the ASG 100 on the left side near the front is a small screw on door Removing the side panel reveals the DIP switch as shown in Figure 2 5 The individual switches that affect editing and what each does are shown in Figure 2 6 Figure 2 5 Remove side panel door to access DIP switch Operation and Setup ASG 100 Service Manual PROGO UP Loads factory settings and erases user settings at power on DOWN Recalls user defined settings at power on UP Enables editing of the MANUAL test settings PROG a DOWN LDisables editing and fixes the MANUAL test settings UP Enables editing of the LINE UP test settings DOWN Disables editing and fixes the LINE UP frequency and amplitude UP Enables editing of the AUTO test settings and ID DOWN Disables editing and fixes the TEST Lev and ID UP Front panel controls are enabled PROG6 DOWN Front panel controls are disabled PROG7 UP RS 232C remote control is enabled DOW
138. fined frequency level and timing patterns that permit automated testing of the signal path characteristics Each of the test signals in the automatic test sequence are used to check on the different parameters that are important to signal quality The tests have defined sequences for both monaural and stereo audio testing and are based on Recommendation 0 33 of the CCITT Specification For Measuring Equipment Volume IV Series O Recommendations 1988 When used with a CCITT 0 33 compliant receiver such as the Tektronix VM700A Option 40 or Option 41 the results of the AUTO testing sequence can be documented automatically without the need for human intervention unless of course an out of tolerance condition is found by the test The Tektronix VM700A Option 40 and Option 41 receiving and measuring equipment uses the test signals sent by the companion ASG 100 audio signal generator to measure the following parameters as defined in Recommendation 0 33 for monophonic audio paths Insertion Gain Frequency Response Distortion Signal to Noise Ratio Compandor Linearity Expanded Noise For stereophonic audio paths additional measurements are done to assure the A B left right channel parameters of the signal paths are sufficiently matched for proper transmission of the program audio ASG 100 Service Manual 1 1 Introduction and Specification ASG 100 Service Manual The added measurements are Interchannel difference in gain and phase
139. g converters Bits SCO SC1 and SC2 are called flag bits and are used by the address decoder U12 to determine which device on the serial bus is being addressed One of the bits SCK is the serial bit clock This bit clocks the serial data in the data formatter synchronizer and the CODEC U9 The serial digital data from the CODEC SRD is applied to the DSP via pin 42 PC7 The serial output data line from the DSP is STD PC8 This data stream is applied to the data formatter synchronizer to be formatted for application to the digital to analog converters Oscillator A crystal oscillator device Y3 produces an 18 432 MHz clock signal that is applied to the EXTAL external clock input pin of U1 Address Decoder Address decoder U12 is a programmable array logic device It has inputs from the DSP and the control register latch The various chip selects to the devices on the DSP bus are decoded by depending on the state of all the input signals These control signals are 1 CODEC Enables the CODEC device U9 when an audio signal is being recorded for the audio ID 2 CTRL Clocks the control registers U10 and 1 11 to latch new control data for the CH 1 and CH 2 gain attenuation and relay states 3 PCMLE Enables the data latches for the left and right digital to analog converters U15 and U14 CEEXTO CEEXT1 and CEEXT2 Unused signals to J310 CEROM Chip enable to the EPROM devices U2 U3 and U4 CERAM Ch
140. gnal is at the beginning of the trace on the center horizontal graticule line Press the X10 MAG control of the oscilloscope Verification and Adjustment ASG 100 Service Manual 10 11 m Check that the difference between the two channel traces is less than 0 28 horizontal division 0 28 div 1 00 degree Set the ASG 100 frequency to 10 Hz and set the oscilloscope to 10 ms with X10 MAG on Make sure the trigger point and trace still start at the beginning of the trace on the center horizontal graticule line Check that the difference between the two channel traces is less than 0 28 horizontal division Disconnect the test oscilloscope setup Check Loop Through a b Provide a test signal of known amplitude check or set with the rms meter Apply the test signal to the Audio In Left XLR loop through input and connect the Audio Out Left connector to an rms voltage meter Check the test signal for the signal level set in part a Move the test signal input to the Audio In Right XLR connector and connect the Audio Out Right signal to the rms voltage meter Check the test signal for the signal level set in part a NOTE An additional check of the loop through may be done if considered necessary Perform a THD N check of the signal before and after the loop through to verify no additional distortion of the signal occurs and no additional noise is added to the signal Check SAVE Opera
141. gure 1 and Figure 2 2 ASG 100 Service Manual Remote Operation IBM PC XT and ASG 100 VM700A DB 9 DB 25 Figure 1 Cabling to IBM PC XT or Compatibles and the VM700A ASG 100 IBM AT 386 DB 9 DB 9 Figure A 2 Cabling to IBM AT 386 and Compatibles Remote Operation ASG 100 Service Manual NOTE all configurations pins 4 6 and 9 on the ASG 100 serial port must not be connected to the serial port on the remote terminal or computer they are reserved for remotely enabling function editing and initiating the AUTO test Typically if you establish remote control through a terminal or computer you will perform these operations through remote commands rather than through shorting these pins Set DIP Switch to Enable Remote Control As explained in Section 2 Operation and Setup certain functions are enabled and disabled by the positions of the switches on the 10 switch DIP labeled S1 on the circuit board You access this switch through the cover on the left panel of the ASG 100 As with all servicing refer the internal adjustments to a qualified service person Remote operation of the ASG 100 through its remote port is enabled when switch 51 position 8 labeled PROG on the circuit board is in the up position Set Serial Communication Parameters on the Terminal Using the commands appropriate for your terminal or terminal emulator set the communication parameters to the values shown belo
142. have ordered has been replaced with a new or improved part your local Tektronix Inc Field Office or representative will contact you concerning any change in part number Change information if any 1s located at the rear of this manual Using the Replaceable Electrical Parts List Cross Index Mfr Code Number to Manufacturer Abbreviations List of Assemblies ASG 100 The tabular information in the Replaceable Electrical Parts list 1s arranged for quick retrieval Understanding the structure and features of the list will help you find all of the information you need for ordering replaceable parts The Mfg Code Number to Manufacturer Cross Index for the electrical parts list 15 located immediately after this page The cross index provides codes names and addresses of manufacturers of components listed in the electrical parts list Abbreviations conform to American National Standards Institute ANSI standard Y 1 1 A list of assemblies can be found at the beginning of the electrical parts list The assemblies are listed in numerical order When the complete component number of a part is known this list will identify the assembly in which the part 15 located 6 1 Replaceable Electrical Parts Column Descriptions Component No Column 1 Tektronix Part No Column 2 Serial Assembly No Column 3 and 4 Name and Description Column 5 Mfr Code Column 6 Mfr Part No Column 7 6 2 The component
143. he next power on of the ASG 100 the previously saved defaults are restored Front Panel and Remote Control Enabling Depending on the mode of operation needed you may choose to disable the control capabilities of the ASG 100 If remote control alone is needed and you want no local front panel access you may disable the front panel controls by setting PROG6 section 7 of S1 to the down position This effectively prevents any changes from the front panel of the instrument the front panel is locked out The remote control capability of the ASG 100 may be locked out by setting PROG7 section 8 of S1 to the down position If access is attempted when the RS 232C serial port is shut off a message is sent to that effect The ASG 100 still responds to the control signals it recognizes control C control Q and control S and sends out the sign on messages but it will not respond to any commands Even if both the front panel and the remote access are disabled the contact closure operation via the remote connector for sending an auto test sequence and enabling the editing features still work This state of the controls provides minimal access to making any signal level or auto test type changes and may be used when those sort of changes to operation are to be restricted Setting the Output Impedance The factory setting for output impedance is 12 If your audio system s configuration requires some other impedance level you can change t
144. he flatness has to be calculated using the measured voltage to check the actual flatness over frequency More or other frequencies may be checked as considered necessary The empty columns of Table 4 3 are provided to enter the amplitude for each frequency if you wish The voltage to dB conversion is done using the following formula _ Measured voltage dB 20 109 Reference voltage The reference voltage value is that noted for the 1 kHz 14 dBu MANUAL Tone signal The Measured voltage is the signal amplitude at each of the other frequencies checked For example Assume the reference voltage 1 kHz 14 dBu is 3 87 V and that the measured voltage for a different frequency signal is found to be 3 854 V Substituting these values into the equation gives 3 854 3 87 Move the XLR connector to the Audio Out Right connector Set the ASG 100 for a MANUAL R Tone of 1 kHz at 14 dBu dB 20 log 0 036 dB Repeat parts b through d to check the right channel amplitude flatness Check Channel to Channel Level Difference lt 0 2 dB at 14 dBu a With the XLR connector on the Audio Output Right signal set the ASG 100 for a MANUAL Tone output signal of 1 kHz at 14 dBu Using the Tone test signal places the same signal on the left and right channel output amplifiers Note the output amplitude of the right channel Tone signal on the rms meter Move the XLR connector from the Audio Out Right connector to the Audio Out Lef
145. he resistor network on the ASG 100 circuit board to create the required impedance The output impedance of the ASG 100 is controlled by a resistor network located in the socket marked R167 and labeled ACTIVE on the circuit board This socket is centered in front of the XLR connectors labeled J11 and 714 on the circuit board You can change the factory output impedance of the ASG 100 by changing the resistor package in the ACTIVE socket Tektronix manufactures the ASG 100 with a 10 Q DIP resistor package in the R167 socket That resistance in added in series with the resistance of the EMI filters creating a default output impedance of 12 5 per side of each balanced output plus the 0 8 2 each of the two filters The resistor package is marked 100G meaning 10 0 Q 1290 For your convenience an alternate resistor package for producing an output impedance 600 Q is provided This resistor package comes installed in socket R168 which is also labeled SPARE on the circuit board The spare resistor package itself is marked 60106 meaning 600 Q 2 To create a 600 Q output impedance remove this resistor package from the SPARE socket and insert it in the ACTIVE socket in place of the 10 resistor package In addition in case you want to create a custom output impedance the ASG 100 also provides a blank 16 pin header in the socket marked R173 and labeled USER on the circuit board This S
146. his section is divided into two sets of procedures The first set is used to verify the operation of the ASG 100 The second and shorter procedure that follows verification is used to return the ASG 100 to specification if adjustment is needed The test equipment shown in Table 4 1 or an equivalent substitute is that required for both verification and adjustment If the example test equipment is not available check the minimum specifications to determine if another piece of test equipment might be used If other test equipment is used controls and connectors for that equipment may be different than called out for the example test equipment Refer to the appropriate operator s manuals for operation of the test equipment Table 4 1 Test Equipment Required for Verification and Adjustment Minimum Purpose Specification Balanced output sine Check loop through Tektronix SG50102 or wave output 20 Hz to SG 505 8 20 kHz Balanced input THD accuracy gt 0 001 22 Hz to 22 kHz audio bandpass Digital Multimeter with test Accuracy 0 05 Check power supply Tektronix DM504A 2 leads 4 1 2 digit display Frequency Counter Accuracy 0 01 8 digit Check frequency Tektronix DC 503A or display accuracy equivalent RMS Meter Accuracy 1 resolution Check amplitude Fluke 8506A or 8505A 09 or 5 digits balanced input accuracy and flatness equivalent Test Oscilloscope Dual Channel 60 MHz Check channel phase Tektronix 246
147. instead of the ASG 100 output tones Signal Preview Multiplexer The buffer outputs on pin 1 are routed to a multiplexer U41 for signal selection between Norm and Preview At this time the Preview signal is used only to send Silence to the headphones when making a VOICE identification recording Channel 1 and Channel 2 Voltage Controlled Amplifiers 5 8 Multiplexer outputs are passed to DBX voltage controlled amplifiers U33 and U36 The DC control level AUD LEVEL enters at the lower left hand corner of the schematic The front panel volume control potentiometer R5 diagram 7 swings the voltage between 15 V The voltage is buffered and filtered by U39 The AUD LEVEL voltage is by series resistor R132 and capacitor C51 This circuit produces a large time constant filtering action that keeps digital signals and high frequency noise from entering the DC control line ASG 100 Service Manual Theory of Operation Audio Level Control Buffer At the output of U39 the DC control range is 0 48 V to 0 12 V The 0 48 V corresponds to an attenuation of 80 dB when the volume control is rotated fully counterclockwise When the DC voltage is 0 12 volts the voltage controlled amplifier U36 has a gain of 20 dB that sets the headphone volume range Current to Voltage Amplifiers The signal output of the U36 is a current that is sent to U38B and converted to a voltage The voltage passes through series resistor R118 to drive the right
148. intained during power off by a backup battery BT 1 A level monitor U5 controls the CE chip enable input to the RAM When normal power is applied to the monitor the chip enable signal from the DSP CERAM and the 5 V VCCI source are applied to the DSP RAM When the 5 V power is removed the level monitor disables the chip select into to the RAM to prevent random writing or reading and applies the backup battery to the RAM to hold the stored data in memory The RAM is held disabled until power rises to the correct operating level CODEC During a record session the 4 second audio signal from the front panel microphone is amplified and level controlled in the Mic Preamp and AGC circuitry diagram 6 2 That analog signal is applied to the CODEC device U9 where is is digitized and output in a serial data stream The digitized audio signal is processed by the DSP U1 for storage into RAM U6 a battery backed memory device On command from the control processor the stored digital audio data is retrieved and applied to the digital to analog converter DAC circuitry where it is converted to an analog signal for output to the CH 1 and CH 2 output connectors The clock signal for the digitizing rate of the CODEC is provided by the SCK clock signal developed by the DSP The CODEC and the DACs run at different rates but the firmware is programmed to perform sample rate conversion of the sampled audio data DIGITAL TO ANALOG CONVERTER Diagrams 3
149. ion Code Number 260 2442 00 SW PUSH SPST MOM NO 100 GRM FRC COND 80009 260 2442 00 RBR CONT GRN LED W KEYCAP HL20 LSG ATTACHED PARTS 366 067 1 00 PUSH BTN W LENS HL20 1101 80009 366 067 1 00 END ATTACHED PARTS 260 2442 00 SW PUSH SPST MOM NO 100 GRM FRO COND 80009 260 2442 00 RBR CONT GRN LED W KEYCAP HL20 LSG ATTACHED PARTS 366 0067 1 00 PUSH BTN W LENS HL20 1101 80009 366 067 1 00 ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 0716 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 0716 00 END ATTACHED PARTS 250 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 07 16 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 0716 00 PUSH BTN 80009 366 07 16 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 0716 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 0716 00 PUSH BTN 80009 366 07 16 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 07 16 00 END ATTACHED PARTS 260 2300 00 SW PUSH SPST 25MA 15VAC 34361 B3F 1152 ATTACHED PARTS 366 07 16 00 PUSH BTN 80009 366 07 16 00 END ATTACH
150. ip enable to the RAM This signal is applied to the battery backup level monitor U5 The level monitor acts to prevent the RAM from being enabled and switches to the backup battery when power to the ASG 100 is switched off Control Register Latches Control signals that select the gain attenuation and relay states for the CH 1 and CH 2 signal paths diagram 4 A2 are latched from the data bus into latches U10 and U11 When control data states must be updated the DSP places the data on the lower 16 bits of the data bus and generates a CTRL clock output from the PAL address decoder U12 At power up the DSPRST signal from the control processor circuitry goes low to clear the latches to a known state before the DSP writes the correct contro data EPROM DSP 5 4 The three 64 Kbyte EPROM memory devices U2 U3 and U4 store the DSP s operating firmware They are addressed in parallel on the 16 bit address bus and their 8 bit data bus outputs are stacked to yield the 24 bit word used by the DSP RAM The DSP RAM U6 is a 32 Kbyte memory chip A 15 bit address selects the RAM memory space to be written to or read from The DWR and DRD write and read signals from the DSP select the direction the CEO also from the DSP via the level monitor U5 enables the RAM to output or input data on the lower 8 bits of the data bus ASG 100 Service Manual Theory of Operation Battery Backup The DSP RAM U6 has its stored memory ma
151. is typically in a fixed industrial location CAT Il Local level mains wall sockets Equipment at this level includes appliances portable tools and similar products Equipment is usually cord connected CATI Secondary signal level or battery operated circuits of electronic equipment A measure of the contaminates that could occur in the environment around and within a product Typically the internal environment inside a product is considered to be the same as the external Products should be used only in the environment for which they are rated 1 Introduction amp Specifications Table Certifications and compliances cont Category Standards or description Pollution Degree 1 No pollution or only dry nonconductive pollution occurs Products in this category are generally encapsulated hermetically sealed or located in clean rooms Pollution Degree 2 Normally only dry nonconductive pollution occurs Occasionally a temporary conductivity that is caused by condensation must be expected This location 15 a typical office home environment Temporary condensation occurs only when the product is out of service Pollution Degree 3 Conductive pollution or dry nonconductive pollution that becomes conductive due to condensation These are sheltered locations where neither temperature nor humidity is controlled The area is protected from direct sunshine rain or direct wind Pollution Degree 4 Pollution that generates
152. is one of the AUTO TEST sequences when the sequence is complete the ASG 100 automatically switches off line and program audio is switched on line When the output switching relay is not energized the user s input signal is passed through This prevents interruptions to the user s signal if the ASG 100 loses power or is switched off EMI Filters A choke and a capacitor in series with the relay coils help reduce high frequency interference Other filter devices consist of ferrite beads and bypass capacitors to ground in series with the outputs and inputs These devices also reduce radiated EMI from the remote connector on the ASG 100 rear panel Control Signals CTRLO CRTL3 A relay driver IC U27 converts logic signals from the DSP to voltages that actuate output Switching relays The control signals that run the relays and step the multiplexers enter through the CTRL 0 15 bus from latches U10 and U11 diagram 2 PREVIEW CRTL12 The PREVIEW signal is used to switch the headphone output off during recording of the VOICE identification HEADPHONE AMPLIFIER Diagram 5 input Differential to Single Ended Amplifiers Two buffers receive the and CH2PHO differential signals and convert them to single ended outputs The left channel buffer is U35A channel 1 and the right channel buffer 16 U38A channel 2 The single ended output is routed to the headphone jack where it allows the user to monitor the feed through audio
153. kHz band width at 24 dBu Generator to 90 dB at 1 kHz and 20 kHz Output Input to Output 110 dB at 1 kHz and 20 kHz with both loop through ASG outputs unterminated 100 off line 115 dB at 1 kHz and lt 110 dB at 20 kHz with driven channel terminated into 600 and the inactive channel unterminated 120 dB at 1 kHz and 20 kHz with the driven channel unterminated and the inactive channel terminated in 600 120 dB at 1 kHz and 20 kHz with both outputs terminated in 600 Q B039999 and below B040000 and above 1 4 Left tone into Right output or Right tone into Left output generator source resistance 12 and load termination either open or 600 Q Left channel input into Right channel output or Right channel input into Left channel output source resistance 50 Typ 7130 dB measured over 22 kHz bandwidth at 1 kHz ASG 100 Service Manual Introduction and Specification THD Noise measured over 22 kHz bandwidth Noise limited _5 4 6 below 5 4 dB Output in dBu Figure 1 1 Typical 1 kHz THD Noise versus Output Level Table 1 2 ASG 100 Multitones Multitione 4 246 223 656 750 293 270 1031 867 375 352 2016 422 562 4031 949 879 8019 1184 1512 1887 2391 3000 3 85 4758 6012 5590 7570 7043 9539 88 1 11180 14074 17742 19992 1113 1395 1758 2227 2789 3516 4430 15000 uk N e 4 The Multitone
154. ment by wiping with a soft cloth or small brush A brush is especially useful to remove dust from around the selector buttons knobs and connectors Hardened dirt may be removed with a cloth dampened in water that contains a mild detergent Abrasive cleaners should not be used Clean the interior of the instrument by loosening the accumulated dust with a dry soft brush Once the dirt is loosened remove it with low pressure air high velocity air can damage some parts Hardened dirt or grease may be removed with a cotton tipped applicator dampened with a solution of mild detergent and water Abrasive cleaners should not be used If the circuit board assemblies must be removed for cleaning follow the instructions for removal replacement under the heading of Corrective Maintenance After cleaning allow the interior to thoroughly dry before applying power to the instrument Do not allow water to get inside any enclosed assembly or component Do not clean any plastic materials with organic cleaning solvents such as benzene toluene xylene acetone or similar compounds because they may damage the plastic Visual Inspection After cleaning carefully check the instrument for defective connections damaged parts and improperly seated transistors or integrated circuits The remedy for most visible defects is obvious however if heat damaged parts are discovered determine the cause of overheating before replacing the damaged part to prevent
155. n check fails it may mean that the instrument needs repair and or adjustment Refer any repairs or adjustments to a qualified service person Preparation Remove the small access plate on the left side of the ASG 100 to set the internal dip switch for performing the verification procedure Set the switch sections of S1 as follows to enable the editing and save features of the ASG 100 so they can be checked Note the switch positions prior to setting them if it is necessary to restore the setup PROGO section 1 1 through PROGS sections 2 3 4 up section 5 up PROGS section 6 down PROG6 section 7 up PROG7 section 8 and MODB sections 9 10 up Procedures 1 Power Up Check a Connect the power cord to the ASG 100 and turn on the ASG 100 b Check that the ASG 100 initializes normally and finishes with the AUTO LED lit Set PROGO section 1 of the internal dip switch to the down position This enables user s front panel settings to be restored on power up With PROGO in the up position factory defaults for front panel settings are stored in the NVRAM at each power up 2 Check Frequency Accuracy 0 1 4 2 a Connect the Audio Out Left connector to the frequency counter BNC input via the XLR female to triple banana connector adapter and the BNC male to dual binding post banana adapter Connect pin 1 of the XLR connector green to ground of the BNC dual binding post adap
156. n cycles up or down through those choices displaying them in the display window If the currently selected function displays a value that may be edited such as frequency test level or the identification code a blinking cursor indicates the currently editable character Pressing the or button cycles up or down through the available characters or numerals When editing numbers or alpha characters pressing and immediately releasing the button increments or decrements the value by one number or alpha character Pressing and holding the button for 1 second initiates automatic incrementing or decrementing which continues until you release the button The frequency and level settings have upper and lower limits and cease changing when those limits are reached The list the character selections for ID are circular and return to the starting point when continuing a change in the same direction When making test name selections the buttons must be pressed and released for each new choice The list of test names is also circular and returns to the starting point when continuing a change in the same direction lt Arrow Right Arrow The and buttons are used to select the left or right manual test signal and allow you to select digit for editing when editing is enabled If a value you can edit is displayed pressing the or gt buttons moves a blinking cursor one character to the left or the right When the cursor is on
157. nabled pressing the SAVE button stores the function value currently displayed as the default and Saved will appear in the display Once you save a function value powering on the unit restores that value if user defined settings are enabled If user defined settings are not enabled the new value saved will be in effect for the time the power is on only When the power is turned off and back on the factory defaults will be returned The normal setting is for user defined settings to be enabled and recalled on power on NOTE When the factory defaults are restored all user selected values are written over in the NVRAM and the user defaults become the same as the factory defaults Saving can be done either from the main selection level or at the level of the individual parameter For example if the LINE UP function is currently displayed and you press the SAVE button the frequency and the amplitude parameters currently specified for the line up tone are stored If the frequency value itself is displayed and you press the SAVE button only the frequency value is stored A selected auto test sequence may be saved as the power on choice as well as a selected manual test signal Just select the one you want the start up setting to be and press SAVE The ASG 100 powers up each time with the AUTO choice selected and the selected test will be the one that you saved When MANUAL is selected the test name you selected and saved will be the one that appear
158. nal Parameters When you have changed the parameter to the value you want save it as the default by pressing the SAVE button If a top level function Line Up or one of the Manual test signals is displayed pressing the button saves as defaults the values of all parameter settings beneath that function both frequency and amplitude in the case of Line Up If it is a test signal parameter such as the frequency that is displayed pressing the SAVE button saves only that parameter value as a default the default values of any other parameters under the function such as the amplitude are not updated To leave a signal parameter you have been editing press any of the main level function buttons SILENCE VOICE AUTO LINE UP or MANUAL When you finish editing signal parameters and saving the desired default values ensure the DIP switches are set as follows PROG 0 Down This preserves the saved values as defaults that will be restored whenever the operator powers up the instrument Placing DIP switch 5 1 in the up position erases all user defined settings and returns factory settings when the operator powers up the instrument PROG 1 PROG 3 Down This prevents further editing of signal parameters NOTE You may choose to leave all any or none of the user definable frequency and level choices of a testing option editable from the front panel by the technician or engineer using the ASG 100 A normal choice may be to fix the AUTO an
159. nalog converter The output is a current signal from pin 13 that has nominal values of 1 mA peak That current is input to the summing node of U20 where it is converted to a voltage signal at the output of U20 pin 10 The feedback circuit that sets the loop gain of the DAC and the current to voltage converter is formed by resistors R24 an adjustable potentiometer and R23 5 5 Theory of Operation ASG 100 Service Manual With input data bits equal to 10000 the MSB is one and the output should be 0 mA The DAC has a most significant bit adjust potentiometer R27 called Distortion Adjust An audio distortion analyzer must be used to set the signal distortion to its minimum value Low Pass Filters The signal voltage from 172015 applied to FL3 an 11 pole low pass filter with a 23 kHz cutoff The upper output signal frequency is 20 kHz but a 23 kHz low pass filter is used to move the ripple effect of the filter above 20 kHz The DAC sends a new output every 1 48 kHz which approximates a sine wave The filter smooths the steps to a sine wave The signal then enters buffer amplifier U13A The buffer has gain of four to compensate for a 6 dB loss in the filter and to provide the proper operating amplitude At TP7 the signal is twice the amplitude as it is at U20 pin 10 Filter Voltage Reference Regulators The filters are powered by 12 and 12 volts The power source is derived from the and 15 volt supplies by three termin
160. ncies listed in Table 4 4 Other frequencies may be used if considered necessary The empty columns of Table 4 4 are provided to enter the THD reading for each frequency if you wish Table 4 4 Test Frequencies for THD Noise Reading Reading LLL o Xem 1 22222 22 22 2 o 80 10000 Hz 15000 Hz Measurements above 7 kHz should be made using the 80 kHz Low Pass Filter Set the ASG 100 for a frequency of 20000 Hz and check for THD N of less than 0 056 f Move the XLR connector to the Audio Out Right connector Set the ASG 100 for a MANUAL R Tone signal and repeat the measurements of parts d and e 4 5 Verification and Adjustment 4 6 ASG 100 Service Manual Check Signal to Noise Ratio gt 80 dB at 0 dBu at 1 kHz Move the XLR connector to the Audio Out Left connector Set the ASG 100 for a MANUAL L Tone output of 1000 Hz at 0 dBu a b om h 1 Set the distortion analyzer for dB RATIO and LEVEL Select the AUDIO BAND PASS filter Press SET REF on the distortion analyzer The reading should now be 0 0 Select SILENCE from the ASG 100 Check that the noise floor is more than 80 dB down from the signal level Move the XLR connector to the Audio Out Right connector Set the ASG 100 for a MANUAL R Tone output of 1000 Hz at 0 dBu and repeat parts c through f to check the right channel Signal to Noi
161. nd sent requires a reply from the ASG 100 or starts an AUTO test sequence i e Sweep which needs about 32 seconds to finish an appropriate time delay must be permitted before another command is sent Attempting to batch load a set of commands to the ASG 100 may cause command data to be lost while the ASG 100 is sending its reply Also any command sent the ASG 100 while an AUTO test is being executed will terminate the AUTO test ASG 100 Service Manual Remote Commands Remote Operation There are commands that take arguments to permit the parameters of the command to be altered The commands also have associated queries to determine the parameters of a test signal Several of the commands are queries only There are also three control characters that the ASG 100 recognizes to assist in remote operation of the instrument A concise list of the commands arguments queries and special control characters is given in Tables A 3 A 4 and A 5 for quick reference The text following the tables explains the commands in more detail Table A 3 List of ASG 100 Commands Arguments and Queries auto auto help Auto with no arguments starts the selected auto test at the current level setting The level argument sets a new TEST Lev for the 0 33 and Tek tests from 6 dBu to 14 dBu The test name argument selects the test sequence If the test signal for auto is a Sweep signal the level argument sets a new SweepLev from 90 dBu
162. nel The level argument sets the new signal level from 90 dBu to 24 dBu The query returns the present level for the polarity test signals Itone l evel f frequency Sends the tone signal to the left channel The level argument sets the new signal level from 90 dBu to 24 dBu The frequency argument sets a new frequency from 10 Hz to 20 kHz The query returns the present level for the tone test signals lt 1121314 gt mtone n Sends the selected multi tone 1 2 3 or 4 to both channel channels A and B The level argument sets the new signal level from 90 dBu to 24 dBu The query returns the present level for the multi tone test signals offline offline Takes the ASG 100 offline and restores the input program if any to the downstream equipment The query replies that there are no variables for offline A 8 ASG 100 Service Manual Remote Operation Table A 3 cont Commands Argument Argument Queries Responses The query returns the present level rmtone lt 1121314 gt rmtone n for the multi tone test signals k evel rpolr Sends the polarity signal to the right channel The level argument sets the new signal level from 90 dBu to 24 dBu The query returns the present level for the polarity test signals rtone f frequency rtone Sends the tone signal to the right channel The level argument sets the new signal level from 90 d
163. ng PROGO of DIP switch 51 control 5 Halts serial port communication from the ASG 100 Normally used by a terminal or host computer to prevent an input buffer overflow Restores serial port communications that have been stopped by a control S Command Description Help Commands To display a list of the remote test signal commands on the terminal screen enter help cr or Figure A 4 shows the resulting menu Sending help with the auto command in the following form auto help returns a list of the legal arguments that may be used with the auto command see Table A 5 for test names Help mode can be disabled to eliminate the output of the help menu and the normal prompts The command to disable the help menu is helpoff cr All error messages and prompts are disabled The ASG 100 still responds to the direct queries for information on frequency or levels when given as shown below but it will not respond to help or auto help and does not return error messages on incorrect commands with help turned off Help is turned on again using the command helpon cr 10 ASG 100 Service Manual Remote Operation ASG 100 REMOTE COMMAND MENU offline unit offline silence the stored voice sequence auto l level Starts auto sequence id Assigns identification code lineup Sends the preset line up tone Alternately sends voice and line up 1l tone Sends a tone to respective channel s
164. nnels plus level setting MANUAL multi tone test in left right or both channels plus level setting SILENCE function VOICE playback e VOICE plus LINE UP test tone alternating ID setting and queries e Queries of test signal settings e OFFLINE LIMITED LOCAL REMOTE CONTROL Limited remote control of the ASG 100 is possible using contact closures on the remote connector One closure activates the auto sequence and the other enables front panel editing of a setting when editing is internally disabled Remote connections for these functions are explained in the following text INSTALLATION FOR REMOTE CONTROL Connect a Properly Configured Communications Cable On the back panel of the ASG 100 to the right of the power switch is a 9 pin male connector labeled REMOTE This DB 9 connector is used to access two types of remote control It may be used to connect switching contacts that are used to start the AUTO Test or to override the editing locked feature so new setups may be saved without removing the ASG 100 from a rack installation to reset the internal DIP switches Its second and most versatile purpose is to provide an RS 232C interface for remote control the instrument s signal generation functions When used for RS 232C serial data transfer the remote port is configured as a 9 pin DB 9 DTE Data Terminal Equipment connector You can set up remote control by connecting this serial port to the serial port of
165. o qualified service personnel Do Not Operate in Explosive Atmospheres To avoid explosion do not operate this product in an explosive atmosphere Do Not Remove Covers To avoid personal injury do not remove the product covers or panels Do not operate the product without the covers and panels properly installed ASG 100 Service Manual SERVICING SAFETY SUMMARY For Qualified Service Personnel only Refer also to the preceding Operators Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present Use Care When Servicing With Power On Dangerous voltages exist at several points in this product To avoid personal injury do not touch exposed connections or components while power is on Disconnect power before removing protective panels soldering or replacing components Use the Proper Power Source This product is intended to operate from a power source that will not apply more than 250 V rms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation ASG 100 Service Manual ix Tektronix ASG 100 AUDIO SIGNAL GENERATOR t 3 09 9 5 VOLUME HEADPHONES ON LINE SILENCE aA a recon 00 OO CO OD OUTPUT
166. ocket is adjacent to the SPARE socket To create a custom output impedance solder your own resistors to this header and insert it in the ACTIVE socket in place of the factory supplied resistor package Operation and Setup ASG 100 Service Manual Figure 2 7 below shows the resistor network and how the socket is wired LEFT output plus polarity LEFT output minus polarity minus polarity RIGHT output RIGHT output plus polarity Figure 2 7 Output impedance resistor network If you make your own resistor network it must consist of resistors of equal value As shown in Figure 2 3 for each output in the XLR connectors a pair of resistors are wired together in parallel for power handling purposes Use parallel resistors with values equal to the output impedance you want to achieve The resistor pairs are wired in parallel so the impedance produced on each output pin is one half the resistance value of each resistor However each output port sums the signals on each of its two signal lines to produce a differential signal This results in an output impedance equal to the resistance value of the resistors used in the resistor package NOTE The output levels indicated by ASG 100 display are in dBu not dBm and do not compensate for changing source or load impedances The levels displayed by the ASG 100 are correct when used with the 12 Q source impedance and a high impedance load gt 1200 0
167. on Range 2 5 6 Switching Control Signals 5 6 Output Bitters oes Se a cub retard BESS SA 5 7 Gain Switching os cesa UR Gu dede d 5 1 Output Impedance Resistor 5 7 Relay Driver D EIE ee te 5 7 Output Switching Relays 12er EE Ea e aie qp 5 7 EMI Pilton uo EH ces rad a ud ee b 5 8 Control Signals CTRLO CRTL3 5 8 PREVIEW 4425 3x25 eed d dod Ded io e AU RUE aC adeo 5 8 Headphone Amplifier Diagram 5 5 8 Input Differential to Single Ended 5 5 8 Signal Preview Multiplexer 5 8 Channel 1 and Channel 2 Voltage Controlled 5 8 Audio Level Control Buller 2 25 os 5 5 9 Current to Voltage Amplifiers 5 9 Preview Termination Transistors 5 9 Microphone Preamplifier Diagram 6 5 9 Microphone Input Amplifier
168. pair or service the product b to repair damage resulting from improper use or connection to incompatible equipment or c to service a product that has been modified or integrated with other products when the effect of such modification or integration increases the time or difficulty of servicing the product THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THIS PRODUCT IN LIEU OF ANY OTHER WARRANTIES EXPRESSED OR IMPLIED TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE TEKTRONIX RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES TABLE OF CONTENTS Table of Contents List of List 4 4 4 Vil Safety Summary Section 1 Introduction and Specifications Introduction 1 1 Automatic Audio Channel 1 1 Manual Signal Testing hh hh ee 1 2 Line 1 2
169. plitude for the Multitone signals is the rms value of signal set not the amplitude of any single frequency component in the set There are presently four sets of multitone signals covering different bandwidths and providing different sine wave components The multitone signals are used to check for response and harmonic distortion of audio circuits and devices amplifiers tape recorders cables etc The factory default for the amplitude is 0 0 dBu REMOTE CONTROL 1 2 There are two types of remote control possible with the ASG 100 The remote control connector on the rear panel of the instrument may be used as contact closure connections for minimal remote operation Using contact closure remote an AUTO sequence may be started and front panel editing may be enabled if it is internally disabled The second type of remote control uses the remote control connector as an RS 232C serial port and the front panel operation may be controlled via a PC or terminal if serial communications is enabled in the ASG 100 The Audio Video Timing signal synchronization feature is also controlled through the remote port See Appendix D of the Operator s manual for information on the Audio Video Timing feature ASG 100 Service Manual Introduction and Specification SPECIFICATIONS Electrical Characteristics Table 1 1 Electrical Characteristics Characteristic Performance Requirement Comment External Power Voltage Nom Input Freq Range Power
170. ponents are not sent at the specified amplitude the amplitude specification is for the combined Multitone signal rms value t 0 1 dB 0 2 dB 10 Hz to 20 kHz 0 05 0 2 dB 10 Hz to 20 kHz relative to 1 kHz Typ 0 1 dB 10 Hz to 19 kHz Typ 0 05 0 1 dB 10 Hz to 15 kHz Introduction and Specification Table 1 1 cont Characteristic Performance Requirement Total Harmonic Distortion Noise for outputs gt 10 dBu 245 MV rms measured over an 80 kHz bandwidth lt 0 0196 80 dB 20 Hz to 18 kHz lt 0 0 2596 72 dB 18 kHz to 20 kHz 0 01596 76 5 dB 10 Hz to 19 kHz lt 0 056 65 dB 219 kHz to 20 kHz Signal to Noise gt 90 dB at 1 kHz at 0 dBu output level measured over a 22 kHz bandwidth XLR Inputs Balanced ASG 100 Service Manual Comment 0 00595 at 1 kHz at full output measured overa 22 KHz bandwidth see typical curve in Figure 1 1 This typical specification will also hold at 14 dBu and 4 dBu V Manual UNEO Od Silence S N improves as the output signal increases and decreases as output reduces proportionally EMI capacitive load of 0 002 uF Looped through to output if ASG 100 is not ON LINE Output Impedance 12 600 Q or User defined balanced Level Difference lt 0 2 dB at 14 dBu Between Channels Phase Difference lt 1 10 Hz to 20 kHz Between Channels Typical Crosstalk Noise measured over 80
171. r 151 0188 00 151 0136 00 151 0235 00 151 0190 00 151 0190 00 151 1121 00 307 0445 00 307 0445 00 307 0445 00 322 3258 00 322 3318 00 322 3318 00 322 3318 00 322 3450 00 322 3450 00 322 3414 00 322 3414 00 322 3318 00 322 3222 07 322 3222 07 322 3176 00 322 3222 07 322 3222 07 322 3176 00 322 3001 00 322 3201 00 311 1895 00 322 3001 00 322 3201 00 311 1895 00 311 2239 00 311 2239 00 322 3112 00 321 1762 07 322 3509 07 321 1611 07 321 1708 01 322 3126 07 321 0021 00 321 0811 07 322 3239 00 322 3239 00 Serial Assembly Number Effective 671 1758 04 671 1758 00 671 1758 00 671 1758 00 671 1758 09 671 1758 00 671 1758 09 671 1758 00 671 1758 09 671 1758 00 671 1758 09 Replaceable Electrical Parts Discontinued Name amp Description 671 1758 08 671 1758 08 671 1758 08 671 1758 08 671 1758 08 671 1758 08 XSTR SIG BIPOLAR PNP 40V 200MA 250MHZ AMPL 2N3906 TO 92 EBC XSTR SIG BIPOLAR NPN 40V 700MA 100MHZ AMPL 2N3053 T0 39 XSTR SIG BIPOLAR PNP 80V 1 0A 150MHZ AMPL 2N4033 TO 39 XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ AMPL 2N3904 TO 92 EBC XSTR SIG BIPOLAR NPN 40V 200MA 300MHZ AMPL 2N3904 0 92 EBC XSTR PWR MOS N CH 60V0 5A 3 0 OHM VNO106N3 VNO0806L TO 92 SGD RES NTWK THICK FILM 9 4 7K OHM 2 0 2W EACH TC 100 PPM SIP10 PIN 1 COM RES NTWK THICK FILM 9 4 7K OHM 2 0 2W EACH TC 100 PPM SIP10 PIN 1 COM RES NTWK THICK
172. rations Electrical components connectors and test points are identified on circuit board illustrations which are located on the back of a preceding schematic diagram Circuit boards are grid numbered with the lowest number in the upper left corner highest number in the lower right Parts Locating Charts Generally components mounted on etched circuit boards are assigned circuit numbers according to their geographic location within the assembly beginning with the lowest numbers at the upper left corner as pictured in the illustration The schematic diagrams are assigned location grids and a parts locating chart for each schematic diagram gives grid locations of components on that schematic Parts Lists There are two separate parts lists in this manual The List of Replaceable Electrical Parts precedes the schematic diagrams and circuit board illustrations The List of Replaceable Mechanical Parts accompanied by exploded view drawings follows the schematic diagrams and circuit board illustrations Replaceable Electrical Parts This list is arranged by assembly as designated in ANSI Standard Y32 16 1975 The list begins with the part numbers for the major assemblies etched circuit boards Each circuit board is identified by an A Assembly Number The circuit numbers of the individual components in the parts list is made up by combining the assembly number with the individual circuit number EXAMPLE R117 on Assembly circuit bo
173. rd Reinstall the front panel assembly Power Supply Removal and Replacement 1 2 3 4 Disconnect connector J23 from the main board Remove the three POZIDRIVE screws holding the power supply to the chassis Slide the plastic shield forward and off the power supply Disconnect connector J1 ON OFF switch from the power supply board and remove the power supply from the instrument 3 9 Maintenance ASG 100 Service Manual To reinstall the power supply use the following procedure 1 Position the power supply board over the mounting studs and reconnect J1 to the board 2 Slide the plastic shield back in place aligning the holes in the bottom of the shield to the mounting stud holes 3 Reinstall the three retaining screws the power supply board Start all three then tighten firmly Do not over tighten Serial Connector EMI Board Removal and Replacement 1 Disconnect connector J25 1 2 inch wide ribbon cable from the main board 2 Usea 3 16 inch nutdriver to remove the connector retaining screws 3 Remove the serial connector EMI board and attached ribbon cable from the instrument To reinstall the serial connector EMI board assembly use the following procedure 1 Place the serial connector through the hole in the rear panel and reinstall the two connector retaining screws Tighten the two screws firmly but do not over tighten 2 Reconnect J25 to the main board Section 4 VERIFICATION AND ADJUSTMENT T
174. ront panel processor and the digital signal processor U1 on the main board ROMCE selects the EPROM U63 for access by the processor NVRCE selects the RAM U64 for access by the processor Front Panel Interface 5 2 LED driver U50 is an octal D flip flop register The processor loads U50 with the LED s that are to be lit There is no physical connection between the front panel button switches and the LED associated with the button The switches are scanned for presses and the processor determines the LED that must be turned on and off via its software instructions Data on the input is transferred to the output on the rising edge of the LEDCLK A reset signal RESETA clears the register at power on and when the front panel reset button is pressed ASG 100 Service Manual Theory of Operation Switch buffers U51 and U52 are read at regular intervals to determine if a front panel button has been pressed The two 8 bit buffers share the data bus and are read at different times by the processor Each buffer has its own enable SWOEN for U52 and SW1EN for U51 Eight switches on U52 and six on U51 provide the 14 front panel buttons The remaining two positions U51 are PROG6 PROG7 which come from DIP switch S1 The main board signals are connected to the front panel via a 50 pin connector J8 on the main board to J1 on the front panel board DIP Switch DIP switch 51 sets some instrument operating states This switch ma
175. rophone preamp U42B pin 7 is applied to U46A an AGC automatic gain control circuit The AGC circuit operates with op amp U42A to convert the signal current to a voltage The feedback loop of U42A has two series resistors a 10 capacitor to ground from the center of the two series resistors The feedback network gives the AGC circuit unity gain at DC for its bias The 10 uF capacitor bypasses any audio AC to ground This forces the audio signal to pass through the AGC circuit for gain control while allowing DC to pass through the RC network to bias the op amp The audio output of U42A to the CODEC U9 diagram 2 is 1 V rms and is capacitively coupled via C70 The AGC circuit uses a pair of back to back clamps VR4 and VR5 in the feedback path to prevent a large voltage overshoot that can be generated by abrupt volume changes Without the clamps the voltage overshoot can overdrive the CODEC 5 9 Theory of Operation ASG 100 Service Manual POWER DISTRIBUTION Diagram 6 The power supply module provides and 15 and 5 to the main board via J23 From the 15 V supply three terminal regulator U68 develops 12 V for the RS 232 serial port device U67 in diagram 1 The 15 V supply provides power to a three terminal regulator U7 that develops the analog 5 supply and the 15 V supply provides power to three terminal regulator U8 That device develops the analog 5 These analog voltages run the DACs U14 and U15 and
176. s For more information on the enabling edits and saves refer to Internal Settings and Setup Editing STATUS FEEDBACK POWER When the ASG 100 is powered on the POWER LED lights up Power On Diagnostics When you power on the ASG 100 it performs a numbered series of tests of its memories and their interconnections and then tests the backup battery The display window shows the number of each test as the ASG 100 performs it in the format shown below DSP 1 4 2 4 3 4 4 4 The sequence of messages above indicates the ASG 100 is performing the self tests but only the first and last will be evident in the display for normal power ons When it completes the numbered tests the ASG 100 tests its backup battery status message is displayed if the battery 15 not good If the ASG 100 fails one of the numbered self tests it keeps trying to perform that test and displaying its number When the ASG 100 indicates a failed selftest you cannot make it perform its other functions Contact your Tektronix representative for service information ASG 100 Service Manual Operation and Setup After repeated iterations the unit may pass a test it failed initially and proceed to the next test in the sequence However you should still stop using the unit and have it serviced OUTPUT 775mV rms The LED above this label blinks when the amplitude of the selected signal is greater than or equal to 0 dBu as required by the CCITT 0 33
177. se ratio Set the ASG 100 to off line and disconnect the signal from the distortion analyzer Check Channel to Channel Phase Difference lt 1 10 Hz to 20 kHz Connect the Audio Out Left connector to the CH1 input of the test oscilloscope via an XLR to banana adapter cable and BNC male to dual binding post banana connector adapter Connect pin 1 of the XLR adapter cable green to ground and connect pin 2 a black to the input binding post Connect the Audio Out Right connector to the CH2 input of the test oscilloscope via an XLR to banana adapter cable and BNC male to dual binding post banana connector adapter Connect pin 1 of the XLR adapter cable green to ground and connect pin 2 black to the input binding post Set the test oscilloscope Input Coupling CH 1 and CH 2 VOLTS DIV Trigger SOURCE Trigger MODE Vertical MODE Horizontal MODE SEC DIV MANUAL AMPLITUDE FREQUENCY ON LINE SET ASG 100 GND 1V CH 2 AUTO CH 1 and CH 2 A o ps Tone 14 0 dBu 20000 Hz On line LED lit and OUTPUT 2775 mV rms LED flashes Adjust the Horizontal POSITION to place the beginning of the sweep on the leftmost vertical graticule line Adjust the Vertical POSITION of both channels to align the baseline traces with the center horizontal graticule line Set the Input Coupling to DC both channels Set the Trigger MODE to NORM and adjust the Trigger LEVEL so that the zero crossing point of the si
178. signals combined in repetitive blocks At the end of the block time all the signals are in phase again for a seamless transition into the next signal block 1 5 Introduction and Specification ENVIRONMENTAL CHARACTERISTICS Table 1 3 Environmental Characteristics Operating Temp 0 C to 50 40 C to 65 Non Operating Temp MECHANICAL CHARACTERISTICS Table 1 4 Physical Characteristics 1 6 ASG 100 Service Manual Introduction amp Specifications Table Certifications and compliances Category EC Declaration of Conformity EMC Australia New Zealand Declaration of Conformity EMC EMC Compliance FCC Compliance EC Declaration of Conformity Low Voltage U S Nationally Recognized Testing Laboratory Listing Canadian Certification Additional Compliance Installation Overvoltage Category Pollution Degree ASG100 Service Manual Standards or description Meets intent of Directive 89 336 EEC for Electromagnetic Compatibility Compliance was demonstrated to the following specifications as listed in the Official ournal of the European Union EN 50081 1 Emissions EN 55022 Class B Radiated and Conducted Emissions EN 50082 1 Immunity IEC 801 2 Electrostatic Discharge Immunity IEC 801 3 RF Electromagnetic Field Immunity IEC 801 4 Electrical Fast Transient B urst Immunity Must use high quality shielded cables to ensure conformance with EMC r
179. ss Index Mfr Code The Mfg Code Number to Manufacturer Cross Index for the mechanical parts Number to Manufacturer list is located immediately after this page The cross index provides codes names and addresses of manufacturers of components listed in the mechanical parts list Abbreviations Abbreviations confrorm to American National Standards Institute ANSI standard Y 1 1 Chassis Parts Chassis mounted parts and cable assemblies are located at the end of the Replaceable Electrical Parts list ASG 100 8 1 Replaceable Mechanical Parts Column Descriptions Figure amp Index No Column 1 Tektronix Part No Column 2 Serial No Column 3 and 4 Qty Column 5 Name and Description Column 6 Mfr Code Column 7 Mfr Part Number Column 8 8 2 Items in this section are referenced by figure and index numbers to illustra tions Indicates part number to be used when ordering replacement part from Tektronix Column three 3 indicates the serial number at which the part was first used Column four 4 indicates the serial number at which the part was removed No serial number entered indicates part is good for all serial numbers This indicates the quantity of mechanical parts used An item name is separated from the description by a colon Because of space limitations an item name may sometimes appear as incomplete Use the U S Federal Catalog handbook H6 1 for further item name identifi
180. ss of life Terms As Marked on Equipment CAUTION indicates personal injury hazard not immediately accessible as one reads the marking or a hazard to property including the equipment itself Refer to the manual for information DANGER indicates a personal injury hazard immediately accessible as one reads the marking Protective ground earth terminal SAFETY INFORMATION Vili Use the Proper Power Source This product is intended to operate from a power source that will not apply more than 250 V rms between the supply conductors or between either supply conductor and ground A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Ground the Product This product is grounded through the grounding conductor of the power cord To avoid electrical shock plug the power cord into a properly wired receptacle before connecting to the product input or output terminals A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation Danger May Arise From Loss of Ground Upon loss of the protective ground connection all accessible conductive parts including knobs and controls that may appear to be insulating can render an electric shock Use the Proper Fuse To avoid fire hazard use only the fuse of correct type voltage rating and current rating as specified in the parts list for your product Refer fuse replacement t
181. t connector Note the output amplitude of the left channel Tone signal on the rms meter Verification and Adjustment ASG 100 Service Manual e Check that the amplitude of the Tone signal is the same for both channels within 0 2 dB The calculation for dB is as given in step 4 f Set the ASG 100 for a MANUAL L Tone signal and note the output amplitude of the L TONE signal on the rms meter Using the L Tone test signal verifies the left channel signal generating circuitry g Check that the amplitude of the L Tone signal is within 0 2 dB of the Tone signal amplitude noted in part d The calculation for dB is as given in step 4 h Take the ASG 100 off line and disconnect the test signal connector from the rms meter 6 Check Total Harmonic Distortion Noise 0 015 20 Hz to 19 kHz 0 056 gt 19 kHz to 20 kHz a Connect the Audio Out Left connector to the balanced input connectors of the audio distortion analyzer AA5501 or AA501 via an XLR female to triple banana connector adapter cable Pin 1 of the XLR adapter cable green is ground pin 2 black is and pin 3 red is b SET Distortion Analyzer Input Range AUTO RANGE Function THD N Response RMS Filters AUDIO BAND PASS or 30 kHz LOW PASS Attenuation None SET ASG 100 MANUAL L TONE AMPLITUDE 14 0 dBu FREQUENCY Table 4 4 ON LINE On line LED lit and OUTPUT 2775 mV rms LED flashes d Check for a THD of less than 0 015 for each of the freque
182. te setting Figure A 3 Setting baud rate during power on Remote Operation ASG 100 Service Manual The baud rate may be set during power up only if PROGO of S1 the default settings switch factory defaults up and user defaults down is set to the user default position down At power up the current baud rate setting for example Baud9600 appears in the display window for about 3 seconds A front panel button that selects baud rate must be pressed to change the setting see Figure A 3 A before that message is removed from the display Setting a new baud rate automatically saves it as the user selectable power on setting When a baud rate selection button is pressed the message Set nnnn where nnnn is the new baud rate will be displayed Holding a button in keeps the setting associated with that button displayed until it is released When released the new baud rate is displayed If that is not the required setting immediately pressing another baud rate choice selects the baud rate associated with that front panel button see Figure A 3 B If a another baud rate selection button is not pressed within the 3 second time period after a baud rate setting has been made the ASG 100 continues with the power on routine and initialization of the front panel settings It is not necessary to turn off the ASG 100 at the rear panel ON OFF switch to get a power up restart for resetting the baud rate Pressing the left and right arrow buttons
183. ter Connect pin 2 of the XLR connector black to the red post of the BNC dual binding post adapter Do not connect pin 3 of the XLR connector leave it open NOTE The color of the conductors for the pins in the XLR connector apply to the example cable If a substitute XLR to triple banana connector adapter is used the correct pin to conductor color must be verified b Select the LINE UP signal from the ASG 100 and check the current frequency setting factory default is 400 Hz c Press the ON LINE button and check that the frequency counter is triggered correctly d Check that the output frequency is as noted part b within 0 1 Example 400 Hz 0 4 Hz 399 6 to 400 4 Hz e Disconnect the test signal from the frequency counter Verification and Adjustment ASG 100 Service Manual HG 100 service Manual 3 CHECK AMPLITUDE ACCURACY 0 2 DB AT 1000 HZ a Connect the Audio Out Left connector to the balanced input connectors of the rms voltmeter via the XLR female to triple banana connector adapter cable Pin 1 of the XLR adapter cable green is ground pin 2 black is and pin 3 red is b Set the ASG 100 for a MANUAL L Tone output of 1 kHz at 0 dBu and press the ON LINE button LED indicator in the button should light c Set the rms meter appropriately to measure 0 dBu 0 7746 V rms unterminated If a 600 termination is used the amplitude will be 0 17 dB lower 0 7594 V rms Check that the amplit
184. ter on each of the 8 lines of the remote control serial interface lines These filters reduce the conducted radiation through the serial interface of high frequency components POWER SUPPLY No diagram provided The power supply is a high efficiency switching supply It produces regulated outputs of 15V 15V and 5V A protection fuse is located at the input of the power supply board The power distribution and decoupling circuits shown on schematic page 6 provide further filtering and regulated 12V and 5V from the power supply s 15V supply line 5V supply is developed by a regulator on the power supply s 15 V line Section 6 Replaceable Electrical Parts This section contains a list of the components that are replaceable for the ASG 100 Use this list to identify and order replacement parts There 1s a separate Replaceable Electrical Parts list for each instrument Parts Ordering Information Replacement parts are available from or through your local Tektronix Inc Field Office or representative Changes to Tektronix instruments are sometimes made to accommodate improved components as they become available and to give you the benefit of the latest circuit improvements Therefore when ordering parts it 1s important to include the following information your order m Part number M Instrument type or model number Instrument serial number Instrument modification number if applicable If a part you
185. the ASG 100 That identification code will be used in the preamble of the auto tests that make use of the unit identifier Note The new id sent via remote control is not saved if the ASG 100 is reset the identifier will default to the previously saved id The form of the command is id tkk Any 4 character combination of ASCII figures letters or punctuation is permitted All four characters are needed but they may be spaces Note if you use a space for all four characters the the display will be blank An error message is generated when an argument syntax error is found if help is on The query id returns the 4 character identification code of the ASG 100 11 Remote Operation ASG 100 Service Manual Special Queries There are two queries that let the remote operator determine the display state of the ASG 100 They are display leds The display query returns the present display seen on the front panel and the leds query returns all the front panel indicators that are on NOTE The power on LED is not firmware controlled so it is not reported in the return Either of these commands may prove useful for determining the state of the ASG 100 without sending a command to cause the state to change Coupled with the queries regarding the present signal parameters tone lineup etc it is possible to determine the state of the ASG 100 front panel and the signal parameters without sending a command th
186. the U S A Canada Europe Japan Australia New Zealand Argentina Venezuela Korea and Taiwan WARRANTY Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one 1 year from the date of shipment If any such product proves defective during this warranty period Tektronix at its option either will repair the defective product without charge for parts and labor or will provide a replacement in exchange for the defective product In order to obtain service under this warranty Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix with shipping charges prepaid Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located Customer shall be responsible for paying all shipping charges duties taxes and any other charges for products returned to any other locations This warranty shall not apply to any defect failure or damage caused by improper use or improper or inadequate maintenance and care Tektronix shall not be obligated to furnish service under this warranty a to repair damage resulting from attempts by personnel other than Tektronix representatives to install re
187. the high speed op amp of the CODEC U9 in diagram 2 The 5 V digital supply is filtered and decoupled by C108 and C69 An indicator LED DS1 on the 5 supply line is lit to show at a glance that the 5 V supply is active The decoupling capacitors for the supplies are indicated FRONT PANEL Diagram 7 Volume Control R5 adjusts the headphone volume but has no affect on test signal output The front panel processor loads display data and addresses display device U1 on the processor data and address bus A subset of addresses ADDRO ADDRA are used to address the display The eight data bus lines are used to transfer display data to U1 Microphone MK1 provides the audio test signal that is digitized for transmission later either when VOICE ID is selected ON LINE or during an auto test when VOICE ID is part of the selected automatic test sequence The LEDs associated with the front panel buttons are not directly connected The data to control LED lighting is provided from the front panel processor via a buffer U50 schematic page 1 The 14 front panel buttons are buffered to the front panel processor by U51 and U52 diagram 1 These buffers are read at intervals to check for button presses Each button press is interpreted by programing instructions The main board interconnect J1 provides 50 pins that interconnect the front panel to the main board SERIAL FILTER BOARD Diagram 8 The serial filter board provides an EMI fil
188. tion NOTE If the SAVE feature is enabled the word Saved appears when the SAVE button is pressed It SAVE is disabled internally the word Disabled appears when the SAVE button is pressed The SAVE feature must be enabled to perform this check Select the MANUAL L Tone signal Set the Frequency for 2 kHz and the Amplitude for 12 dBu Press SAVE the word Saved should appear then turn off the ASG 100 off switch on the rear panel Turn on the ASG 100 When the initialization has completed press MANUAL Check that the L Tone signal is selected the frequency is 2000 Hz and the amplitude is 12 dBu Check RECORD and Headphones Operation a b Connect a of stereo headphones to the front panel HEADPHONES connector and turn the VOLUME control to minimum Press and release the SILENCE and VOICE buttons at the same time 4 7 Verification and Adjustment 4 8 12 13 14 ASG 100 Service Manual Check that the recording sequence begins and record a voice test signal for the 4 second recording session Speak normally about two or three feet from the front of the ASG 100 to record a test message during the recording period Press VOICE then ON LINE Slowly increase the Volume control to a comfortable listening level Check that the recorded test message is continually repeated while the ASG 100 is on line Press ON LINE again to turn off the voice test signal Check Audio Vi
189. tor This DB 9 connector is used to access two types of remote control It may be used to connect switching contacts that are used to start the AUTO Test or to override the editing locked feature so new setups may be saved without removing the ASG 140 from a rack installation to reset the internal DIP switches Its second purpose is to provide an RS 232C interface for remote control of all the instruments functions See Appendix A Remote Control for using the RS 232C interface to control the operation of the ASG 140 remotely An additional feature controlled via the remote connector is the Audio Video Timing measurement signal synchronization See Appendix D Audio Video Timing in the Operator s manual for information on how this feature is used 2 12 ASG 100 Service Manual Operation and Setup INTERNAL SETTINGS AND SETUP EDITING The ASG 100 allows you to enable and disable editing of various signal features such as amplitude frequency and signal identification Front panel control or remote control or both may also be either enabled or disabled You can also change the output impedance of the ASG 100 This section describes how to make these changes You control signal editing and output impedance through two components found on the circuit board inside the ASG 100 10 pole DIP switch labeled S1 on the circuit board The settings of the first four switches control editability of the user definable test variables and the de
190. ude is 0 dBu 0 2 dBu 0 75697 to 0 79264 rms e Set the ASG 100 to the other dBu values given in Table 4 2 and check that the rms meter reads within the amplitude tolerance shown Use either Auto Range or an appropriate voltage range setting of the rms meter to make the measurement f Move the XLR connector to the Audio Out Right connector set the ASG 100 for a MANUAL R Tone output signal of 1 kHz at 0 dBu and repeat parts c through e to check the right channel signal amplitude accuracy Table 4 2 Amplitude Accuracy Check Points 4 CHECK AMPLITUDE FLATNESS 0 05 0 2 DB 10 HZ TO 20 KHZ a Move the XLR connector to the Audio Out Left connector Set the ASG 100 for a MANUAL L Tone output of 1 kHz at 14 dBu b Note the amplitude of the test signal as indicated by the rms meter 14 dBu is 3 8822 Set the ASG 100 frequency to the values given in Table 4 3 and note the output amplitude as indicated on the rms meter for each frequency 4 3 Verification and Adjustment ASG 100 Service Manual 4 4 4 Table 4 3 Test Frequencies for Amplitude Flatness ASG 100 Frequency Left Tone Amplitude Right Tone Amplitude 1000 Hz reference Check that the amplitude is flat within 0 05 0 2 dB at each test frequency with respect to the 1000 Hz 14 dBu amplitude noted in part a The amplitude accuracy specification permits the 14 dBu amplitude at 1000 Hz to be 3 7938 to 3 9726 V and t
191. usually made uneditable from the front panel so that the known reference for the automatic testing sequences is not easily changed Typically if a TEST Lev change is needed editing is enabled by a technician to allow an adjustment then editing is disabled again to lock in the new values for use by operators in the field For more information on enabling editing refer to Internal Settings and Setup Editing NOTE When monitoring the test signals with test equipment such as a VM700A Option 40 or Option 41 to get correct readings of insertion gains be sure the Test Level setting on the VM700A matches the Test Level setting on the ASG 100 To display the current TEST Lev value from AUTO with an O 33 or TEK AUTO Test selected press the AMPLITUDE button The TEST Lev label is displayed while the button is held in and the test level setting is displayed when the AMPLITUDE button is released When editing is enabled and you want to change the TEST Lev setting move the blinking cursor to the digit you want to change by pressing the lt gt buttons Then change the value of the digit by pressing the button or button If you wish to make the new setting your default value you must also press the SAVE button after making the edit You can not go ON LINE from the TEST Lev display you can either press the AMPLITUDE button again or make another selection to clear the TEST Lev display Sweep Test Level The Sweep sequence test level
192. ve the front panel assembly see the Front Panel Removal and Replacement procedure 2 Disconnect connectors J23 to the power supply and J25 to the rear panel from the main board ASG 100 Service Manual Maintenance Remove the eight POZIDRIVscrews holding the main board to the chassis Use a 3 32 inch flat bit screwdriver to release the four XLR connectors from their housings on the rear panel Insert the screwdriver into the small slot in the center of the XRL connectors and turn counterclockwise less than 1 4 turn required to release the latch Lift up the front of the main board slightly to clear the mounting studs and press on the connectors while sliding the board toward the front to remove the connectors from their housing on the rear panel A slight wiggle of the front of the board helps to release the connectors from the housings To reinstall the main board use the following procedure 1 2 Slide the main board XLR connectors straight into the connector housing on the rear panel Align the screw holes in the main board with the mounting studs and start all eight retaining screws After all the screws are started tighten all eight screws Do not over tighten Use the 3 32 inch small bit screwdriver to reengage the XLR connector release by inserting the bit into the small slot in the center of the connectors and turning clockwise until the latch is engaged less than 1 4 turn Reconnect J23 and J25 to the main boa
193. vice Crystal Y2 generates the 11 059 MHz operating frequency for the front panel processor Reset Circuit U54 and Inverting Buffer The Reset circuit delays processor operation until the voltage stabilizes When the operating voltage reaches a stable level the reset is removed from the front panel processor allowing it to access its memory for initialization commands The output of U54 is true low so an inverter U40C provides the necessary logic level to the processor s Reset input Address Latch Address Data Demultiplexer The eight bits of the data bus DATAO through DATAT are multiplexed with the lower eight bits of the 16 address bits Multiplexer U47 is enabled by ALE address latch enable when the bus has valid address data and those eight bits are latched The latched bits plus the remaining eight bits from the unmultiplexed address bus combine to produce the 16 bit addresses on the address bus ADDRO through ADDR15 ASG 100 Service Manual 5 1 Theory of Operation ASG 100 Service Manual RAM RAM U64 is a static RAM device with a 15 bit Address Bus and an 8 bit Data Bus The RAM device is connected to a backup battery to hold the stored data in memory during power off The backup battery makes this RAM a non volatile device and it is used to store the user selectable operating states for the ASG 100 When user selectable defaults are enabled the state of the instrument on power up is restored from the saved data in this devi
194. vicing to a qualified service person Use only the specified fuse or equivalent if replacing the fuse Physically the fuse is a DIN metric size fuse but electrically it is UL and CSA rated for correct protection of the fused circuitry Specified Replacement Fuse Tektronix part number 159 0296 00 Replacement Fuse Description Fuse Cartridge MT4 2A 5 2 X 20 mm NORMAL blow Electrical Characteristics Rating 250 V maximum 2A Blow Time at 25 C Ambient 110 of rated current 4 hour minimum 135 of rated current 60 minutes maximum 200 of rated current 5 seconds Interrupting Capacity short circuit current 10 000 A at 125 V 100 A at 250 V PREVENTIVE MAINTENANCE Preventive maintenance consists of cleaning visual inspection performance checking and if needed readjustment The preventive maintenance schedule established for the instrument should be based on the environment in which it is operated and the amount of use Under average conditions scheduled preventive maintenance should be performed every 2000 hours of operation Cleaning The instrument should be cleaned often enough to prevent dust or dirt from accumulating Dirt acts as a thermal insulating blanket that prevents effective heat dissipation and can provide high resistance electrical leakage paths between conductors or components in a humid environment ASG 100 Service Manual Maintenance Exterior Interior Clean the dust from the outside of the instru
195. w _ADDRO DS2 e POWER ADDR1 n 7 ADDR2 L C2 L 3300uF 0 1uF ADDR3 NI 0 51 ADDR4 2120 LEDO J8 21 21722 LED2 MK1 1 MICROPHONE BOARD C123 LED3 2 5 24 LED4 3 2 25 LED5 21 26 LED6 2127 SWO U MICROPHONE 28 3 5 1 HDSP2113 2129 x SW2 18 4 5130 WS WR 92 i lt 1 31 SW4 HPCHEN 172 82 W5 HPFLEN 2 d 2133 SW6 RESETA iu 34 SW7 35 SW8 ADDRO 3 36 SW9 ADDR1 4 137 W10 ADDR2 5 38 W11 ADDR3 6 a a a a a a a a a a 39 SW12 ADDR4 10 lt 1 40 W13 141 N DATAO DATAO 19 142 DATAT DATAT 20 2143 DATA2 23 44 DATAS NI C145 DATA4 NI DATA4 25 2146 DATAS DATAS 26 C147 2 DATAe NI DATAG 27 48 DATA7 28 49 09 5 ol 5V 5V 5V 5V 5V 5V 5V 1 1 1 1 1 1 1 R3G R3F R3E R3D R3C R3B R3A 220 220 220 220 220 220 220 8 7 6 5 4 3 2 S1B S2B S3B S4B S5B 568 t X X 3 3 3 3 3 A SILENCE 7 VOICE SZ SZ SZ Pd ON LINE LINE UP MANUAL DS1 OUTPUT gt 775mV RMS 1 RECORD 1 RECORD 1 1 1 LEDO LED1 LED2 LEDS LED4 5 LED6 SSS
196. w in Table A 2 Table A 2 Serial Communication Parameters Parameter Value mas Baud rate for the ASG 100 is selectable for 1200 2400 4800 or 9600 baud The factory setting is 9600 baud Setting Baud Rate of the ASG 100 The baud rate of the ASG 100 is user settable from the front panel so that lower baud rate modems not capable of the factory default of 9600 baud may be used for remote control Four choices are available 1200 2400 4800 and 9600 baud The data bits parity and stop bits parameters for the ASG 100 are fixed ASG 100 Service Manual Remote Operation NOTE If you need to operate the ASG 100 on a baud rate setting other than 9600 PROGO of 51 must be set to the user defaults position down to make the needed baud rate setting Leave the switch set to user defaults to prevents the baud rate and the other user selectable front panel settings as well from being changed to factory defaults in the event of a loss of power to the ASG 100 The factory default baud rate setting of 9600 is restored at power on if PROGO of S1 is set to the factory default up position ON LINE SILENCE VOICE LINE UP MANUAL EN o RECORD 9 0 E 0 0 0 Factory default baud rate setting ON LINE SILENCE VOICE LINE UP MANUAL RECORD 1200 2400 4800 9600 Press to Set Baud Rate during power up Press and atthe same time to do a power up reset B User selectable default baud ra
197. y be accessed by removing an instrument side panel After setting normal operating frequencies and levels 51 may be set to disable editing and maintain a known operational state Editing may also be enabled via the remote connector using contact closures to connect pins 6 and 9 While these pins are connected the normally editable signals may be changed as needed When the contact is opened to disconnect pins 6 and 9 editing is again controlled by internal switch settings See Section 2 Operation and Setup for more information on DIP switch settings Remote Connector Serial interface U67 is a level translator between the serial port and the rear panel remote connector When contact closure remote operation is used just two serial lines are used for remote control pins 4 and 6 Connecting pin 4 to pin 9 ground starts an auto test sequence connecting pin 6 to pin 9 overrides the internal editing disable if it was set Overriding the internal editing disable lets you change frequencies levels or ID numbers without having to access the internal DIP switch This remote override is not necessary when editing is enabled but in normal operation the ability to edit parameters will usually be disabled after initial setup Serial Filter board A8 provides individual EMI filters on each of the remote control lines These filters keep the ASG 100 from radiating digital noise and also keep external noise from entering via the remote connector DIGI
198. y these amplitudes press the LINE UP button or the MANUAL button and the or buttons to display the Tone or Polarity function then press the AMPLITUDE button As with FREQUENCY discussed in the preceding subsection once you display the LINE UP MANUAL Tone or Polarity amplitude if editing is enabled you can change the amplitude using the Arrow Buttons For information on enabling editing refer to Internal Settings and Setup Editing For more information on adjusting values using the arrow buttons refer to Arrow Buttons When the ASG 100 is ON LINE and you press the button to increase the amplitude if the displayed value is greater than or equal to 0 dBu the cursor automatically locks onto the least significant digit and increases the level by that increment only This protects against sudden unintended jumps in volume Arrow Buttons The Arrow Buttons let you select options and specify values for the AUTO LINE UP and MANUAL functions 2 8 ASG 100 Service Manual Operation and Setup For example the AUTO function offers many standard test signal sequences you can choose Similarly the MANUAL function lets you choose a test signal or specify a number of parameters for you can make the ASG 100 generate The Arrow Buttons let you cycle through the available choices and specify characters or numbers 1 Arrow Down Arrow When the currently selected function offers a set of choices pressing the 1 or 2 butto

Download Pdf Manuals

Related Search

Related Contents

レジレコーダー - nexxion  Philips F5177/NV/  Directives volets  Financial Toolbox User's Guide  SPEEDLINK SL-2308-BK game console accessory    DreamLine DL-6941L-04CL Installation Guide  

Copyright © All rights reserved. Failed to retrieve file