Telex 1505 Stereo Amplifier User Manual
Contents
1. C26 TP7 e o 330pF _ Transmit 2 Li R60 ra Tx Amplifier Rx Ch 1 5 o PI d TP3 p e_N Level P Receive Amplifier O Compressor Limiter 2K R9 p o PI Tx Ch 1 DRM JP6 U7 A 50K Adjust P1 25 C20 R40 623 e C45 SI RN1 ae E ZZ CS a JE AA e NA ob telo ee Lo ol 21 AN el e y R62 e__ Un sel ad 1 0uF 10K 20pF Rx 220K c42 Q9 4 7uF 970 3 nd N NG T4 R113 P1 41 pate i zi 219 Level k JoZ 10 Ann LMC660 IC NN gt Saul Ei s P SIS R41 y Adjust C43 e LE PRZED 45 69 Il AAAW 0 Balanced amp VWw a e SE um 1 0uF 100K 5 z R58 R56 2 5 GR _ RXAGND 2K R5 Si x 2 4 5 CoO YN 51K 10K R112 P1 42 ine LOG da P So ol 5 ve Sol I NN gt JS Output P1 27 500K e 6 s o VR2 NC 0 m R2. Pg B4 C24 TP5 o gt 330pF Rx Ch 43 TODARO me EJ kinh X n i er TP10 i PAZ mplifier p o PI Receive Amplifier gt Compressor Limiter i v Level p o PI T Ch 3 ERE JP U7 C 50K Adjust X ES ais ie Re R88 c a 11 10 il 12 2 iE 2 U2 LOG Ra WEST TTE S i b A l NAM eo o e SE We 9 MERE 0 Input DI Level e R96 6 oO NANI LMC660 ANN A od ea Adjust SA s 100k D Z128 to 069 9 AAA TT R46 2 5 0 Balanced e c _ RXAGND e i 2 4 3 1 0uF OS WNM 51 S 10K i R109 P1 36 Line 500K PF Seo m i eco w E AAN S Output lt e nn o 8 i 1 0uF 10V 10K c3 T1 10K 10 e AAN 1 8 R86 MODE ie ei 4 LM348 33K 5 33K A JPII Shine 0 1uF Balanced 2 5 AS i R85 R13 Line A R108 R28 R87 u c53 IINE R20 e ANN TUN vn 3 1 6 5 1K 10K 001uF 33K 4 620 10K P1 13 C54 gt U2 B 1 0uF MUTE 6 2 lt a gt R44 Paz VRI D RXAGND DS4 5 1K P1 17 o D4 a 8 Mute Jl Pr 2 1N4148 en w C4 TP4 S O 330pF T
3. SCALE 1 1 Jaypeds y MO cfu cf 2 t JO UupDJDDI 19018 J9A J 9UI1 29XIN olpny GOSI oiphy 23 0507 ino 28408 S wyg y a109 olpny TT E dwy sexoeds As 1043005 HA IO SUDI ul duy uj pat 1014009 dB JO UD PUI dwy uj bat 1014005 duy XJ BAB 041005 48L2101EUD OU Guy x RAR Di di I UL l DOGO O E O oOo 0 0 o o Ge D o D C2 OB D D uU punoag 1002 12 JaMOJ 11A 4 PA QL 4 JOJBIA WY A Ol Aiddn m ddns joA0d andu SPA ZI gg d t d 8r tLa B ld ZI t td tf d2 soy 0 v4 Pree cd 8A9 duy xy j8u99Ub eur t ud xy JO WI 208282du07 indu p 2UP BQUfI 1 uo AR NN Ex epo de AJ 23 asi dwy xy JBWOJEUDJJ Out 48110111 20668 240102 ci YI XM indu pazuojoqui 6 13 u OT s Eu A lt il 3 jaar duy 1y 48 11117 10868 1d1202 z uU XM EL td bf uo LU uz 7 C iid jaar duy Ky JSWDJTUDJJ BUT if MO xy _ ed kogo oai lr Ji 4 yr 1 10680 2 du 02 jnduj peouoipQur Si ld 6 5 Microphone Input A microphone input is available through a jack on the front panel It allows connection of a handset or palm type microphone through a standard modular phone connection The jumper options allow the use of a carbon electret or dynamic element The microphone amplifier is adjustable to accommodate the full range of microphones It s
4. 620 2 9 5 dB 910 2 12 0 dB 4 4 Securing the Connections After all power and line connections are made the wires should be neatly bundled and secured in place to prevent accidental breakage when in service Use one or more of the cable guides supplied with the card rack or tie in place with appropriate wire ties 4 5 Interface connector Numbering The Tellabs or equivalent card cage interface connector pins may have a different numbering scheme than the 1505 Table 4 depicts the card edge pin numbers as shown in the schematic which is also the same as one type of connec tor followed by two alternate numbering schemes as used on other connectors Dili gently review the actual connections being used to Table 4 to ensure proper connections are made for optimum performance Record the external connections made during installation in the blanks rows in Table 4 s User Connec tion column make copies of Table 4 and keep records for each 1505 5 Operation 5 1 Description This 1505 module has up to four receive bal anced 600 2 line inputs or high impedance un balanced inputs along with a Mic Handset 1n put that is user configurable by dip switch set ting to drive from one to four 600 Q balanced transmit line outputs or an 8 62 remote speaker The module is also capable of summing up to four receive channel inputs and or a Mic Hand set input into one or more transmit line outputs or the speaker output
5. A compressor limiter circuit is available by jumper selection for each receive circuit to limit the input level to a predetermined setting which assists 1n maintaining proper system lev els This module also contains a summed input circuit and a summed output circuit to allow it to be used in a matrix 1 e three modules can be configured to allow a single input to drive twelve outputs or conversely twelve inputs can be summed to one output Active switch input circuits allow for muting individual receive input channels or the speaker A PTT input activates the microphone circuit 5 2 Operating Capabilities The 1505 accepts up to four balanced or unbal anced inputs switch selectable by the user to four balanced line driver outputs These inputs are also externally mutable by switched low in puts at the rear panel connection In addition the module will accept a microphone or hand set input through the front panel Jack or the rear panel connector The transmit amplifier 1s a 600 ohm balanced line output The module has four balanced line outputs Each amplifier output is adjustable with a range of 15 to 10 dBm The module has a speaker amplifier output that may drive an eight ohm external speaker with an output level of 1 watt The level is adjust able Any line or microphone input may be switched through a module dip switch to any line out put or the speaker output Three 1505s can be connected so one line inpu
6. C37 L C52 NVNN 9 e ANN ae 131156 5 1K 10K 10uF 001uF 33K 620 10K Input 620 OM P1 15 CTS U3 D T lt e i 1 0uF MUTE is cu 10K 10K e e e e R59 6 i RXAGND Y VR2 1528 52 B MC660 VR A DSS gt 5 1K z P1 23 D5 s UU 10V 1N4148 UM FO Z A Mute P1 14 ae gt POWER BUS 0 uF T om i a e o I 15 13 14 pay V 45 12 13 V p 4 n VL 15 V gt hs E U8 B 10 VL V U1 U7 E E gt U3 U2 4 4 E s 2 D 11 End 4 V 11 11 11 MESE Gnd la V 5 PI JLM348 44002128 LM348 LMC660 LMC660 Te 19 Ha 5 e 1062128 dale ato Power Supply e RXAGND _ TXAGND _ MICAGND P1 55 l L gt 12V Ut TP20 m 12 VDC Input P1 56 LM2937 NOTES 1 Unless other specified 1 i x i lt e e 3 10V Rosa are 1 4 WALE 2 and values are in ohms IN OUT Capacitor values are in microfarads t cai L GND 2 R98 2 Receive channels are jumper selected for input impedance of 10K ohm T 470uF TL C80 12 AK S R101 a bridging or 600 ohm line termination i e Channel 1 JP1 ommitted 0 1uF 10uF 15 8K g U9 C a i ME 25V 16V 1 1 8 for bridging and installed for line termination p PE e e 10 EEE L gt VRI 5 5V LM348 3 Receive channels are jumper selectable to include or bypass the lt 9 Compressor Limiter circuit i e channel 1 JP2 A includes the 12 VDC Return 7 P1 40 TP16 circuit JP2 B bypasses the circuit C70 13 U9 D 4 Text located in an outline box indicates front
7. No Connection Ch 4 RXAGND Ch 4 Mute Gnd No Connection No Connection Ch 3 RXAGND Ch 3 Mute Gnd No Connection No Connection Ch 2 RXAGND e Ch 2 Mute Gnd No Connection No Connection Ch 1 RXAGND e Ch 1 Mute Gnd No Connection Ch 4 Tx Bal Line Out Ch 3 Tx Bal Line Out Ch 2 Tx Bal Line Out Pos 12 Vdc Return Gnd Ch 1 Tx Bal Line Out Sum Audio In Earpiece Audio Out Speaker Mute MICAGND No Connection N A Pos 12 Vdc Input 6 Theory of Operation 6 1 General The 1505 module uses a low loss wide band transformer for each channel to interface to the phone line Gain elements are low noise low distortion high gain operational amplifiers for quality performance Each channel utilizes one half of dual compandor IC configured as a compressor limiter to amplify and limit the maximum receive input signal in order to maintain operator adjusted system levels Each receive amplifier output 1s routed through a user programmed switch matrix to summing amplifiers The output of the summing amplifi ers are transmit line amplifiers and a low loss wide band transformer for each channel to in terface to the respective phone line A handset microphone amplifier circuit is in cluded with provision for jumper selection of carbon electret or dynami
8. a matching network with the phone line how ever it induces a loss in the transmission path which lowers the line level and may affect the ultimate performance In order to easily insert the pad a provision has been made in the circuit to allow the user to al ter the value of two resistors in the transmit line output The 1505 is shipped from the fac tory for single line termination without a pad resulting in the balanced transmit line output having a 0 Q resistor in each leg of the trans former without loss To add the pad both 0 Q resistors must be replaced with a value corre sponding to the number of parallel lines Refer to the schematic and Table 3 for proper resistor values and corresponding insertion loss Switch Settines Associated Switch Outputs Tx Ch 1 Tx Ch 2 Tx Ch 3 Tx Ch 4 Speaker Rx Ch 1 S 1 S 1 S 1 S 1 S 1 Rx Ch 2 S 2 S 2 S 2 S 2 S 2 Rx Ch 3 S 3 S 3 S 3 S 3 S 3 Rx Ch 4 S 4 S 4 S 4 S 4 S 4 Mic Input S 5 S 5 S 5 S 5 S 5 Sum Audio In S 6 S 6 S 6 S 6 S 6 Table 3 Parallel Transmit Line Resistor Network Selection Resistor Designation Parallel Lines Resistor Value Line Loss dB 3 4 R112 R113 300 2 6 dB 620 2 9 5 dB 910 Q 12 0 dB R119 R121 300 2 6 dB 620 2 9 5 dB 910 Q 12 0 dB R109 R110 300 2 6 dB 620 Q 9 5 dB 910 Q 12 0 dB R118 R120 300 2 6 dB
9. C75 RII R14 R6 R7 R9 R10 RI R3 RS R66 R71 R109 R110 RII2 R113 R114 R117 R118 R119 R120 RIZI Part No 134 2837 134 2967 134 3032 136 0001 136 0022 136 0040 136 0044 136 0050 136 0056 136 0060 Description RES RNSSD 15 0K 1 1 4W RES RNSSD 12 1K 1 1 4W RES RNSSD 15 8K 1 1 4W RES COMP 2 7 5 1 4W RES COMP 150 5 1 4W RES COMP 4 7K 5 1 4W RES COMP 10K 5 1 4W RES COMP 33K 5 1 4W RES COMP 100K 5 1 4W RES COMP 220K 5 1 4W Ckt Sym R100 R103 R98 R101 R107 R63 R99 R13 R16 R24 R26 R27 R30 R31 R35 R36 R39 R40 R46 R47 R51 R56 R57 R61 R68 R75 R79 R83 R87 R92 R4 R8 R33 R42 R72 R73 R77 R78 R81 R82 R85 R86 R89 R90 R91 R23 R65 R70 R76 R94 R95 R96 R74 R80 R84 R88 R93 12 Part No 136 0090 136 0096 136 0289 136 1765 136 1955 136 1983 138 0029 161 0426 161 0630 161 0631 Description RES COMP 650 5 1 4W RES COMP 2K 5 1 4W RES COMP 200K 5 1 4W RES COMP 3K 5 1 4W RES COMP 5 1K 5 1 AW RES COMP 9 1K 5 1 4W RNET CMN 7X10K SIP DIODE 1N4148 LED PCB RDTI DIF RED LED PCB YLTI DIF YEL Ckt Sym R12 R15 R17 R18 R19 R20 R21 R22 R52 R62 R67 R105 R106 R108 R111 RSE R116 R25 R32 R34 R41 R43 R50 R53 R60 R104 R69 R28 R29 R37 R38 R44 R45 R48 R49 R54 R33 R58 R59 R97 R102 R64 RNI RN2 RN3 RN5 DI D2 D3 D4 D5 D6 DSI DS2 6 Part No 286 1766 286 1772 28
10. Low Out In PTT mutes Speaker In JP2 3 4 out Table 1 Jumper Options 4 3 2 Microphone Jumpers Depending on which microphone you are us ing the following jumpers must be installed JP2 carbon element JP3 electret element JP4 dynamic element with a low output No jumpers are installed for a dynamic micro phone with a high output 4 3 3 Receive Line Input Impedance A 6009 terminating resistor is provided for each receive line input Refer to the schematic and Table 1 for the proper jumper installation 4 3 4 Switch Settings Switches SI to S5 provide the means to pro gram the signal inputs to the output circuits Any input can be programmed to any output Multiple inputs can be combined to a single output or conversely a single input can be pro grammed to one output Refer to the schematic and Table 2 for the proper jumper installation Refer to the schematic and Table 2 for proper switch closures Table 2 Output Programming Input 4 3 5 Parallel Transmit Line Impedance Matching If the occasion arises where the transmit line output must operate in parallel with another line terminating device an impedance mis match to the phone line will result To maintain a 60062 termination it will be necessary to cre ate a resistive pad on the output of the 1505 line driver A similar pad must be installed in each parallel device This resistive pad creates
11. Mic Preamp E BAN U4 A 4 ans pue Gt A JP2 R63 R93 gt B 3 2 da 50V 620 Mic Audio ASA A LoA NU a 390pF NNT C d J1 2 kj 150 v 220K C64 a 1 Sr SPKRAGND S k roun 2 B e N DC212B xr R106 J1 3 JP3 R64 TL R70 RN5 U9 B U4 C C29 VV 9 peaker Mic PTT eo G e LM348 Se 2 4 ED 100K gt Yg Sim 7 1 10 Dx 620 Output J1 4 LJ 9 1K 1 0uF C6 lo e O 5 ee o oe NNN U10 Tl 678 utpu Farpiece 063 i i VR2 LM348 3K 4 9 T 22uF Tr e ME 16 U8 A gt 2 NEA DI 3 4 7uF 2 C27 R99 R102 0 1uF ZAB NE570 10V 3 00 5 o 3 4 7K lt 5 1K R91 1 0uF oO WN R97 8 6 C75 8 NA 0 1 8 R89 A R24 DE 6 5 1K R23 sd s h P1 54 0 1uF 33K A 5 8 7 1K IA SEEM R die 10K 7 52 OT as NY LOG 1 PN 220uF Speaker tall R14 2 Cai R90 a gt u e c 0 VM BE R107 25V P1 51 ln 22 n ty ee C28 R 10K l R92 Mem M y ee R17 U4 B T e h2 2 27 100K 100uF Eoo d Mie m 2 10K 10uF 001uF SE 620 DG212B 6 x III gt Output Mic Audio 25V Level 5 vii aber 50 P1 50 VRI Adjust 1 0uF PTT me jf e i O Wu bee Ground A ry mn i y 620 3 za MICAGND 2H DS1 ys R18 0 1uF P1 49 LJ D C10 620 E Mic PTT E eo e _ 000000 o 8 e 1N4148 04uF SZ MUTE SPKRAGND 46 R68 C30 Earpiece WW a yv a 0 1uF A w VE G Speaker Mute UM e A MARK IV COM P1 44 L S kde mae e 1505 Audio o RL MR NN Mixer Line Driver V DAT O S60
12. micro phone This PTT is also routed to the rear con nector panel and is activated by a switched low input 6 8 Indicators The speaker and each receive input channel can be muted The front panel has an indicator to visibly indicate which channels have been muted The front panel also has a PTT LED which 1s illuminated when the PTT switch has been activated on the handset or microphone 6 9 Power Supply The 1505 is intended for operation with a 12 Vdc semi regulated power supply The onboard regulator limits the input voltage and regulates the output voltages to operate the module under various input voltages The power supply is fixed and non adjustable The regulator safely limits the output current through the module Reverse input protection is also provided in case of an inadvertent reverse voltage input Warranty Limited All Vega signaling products are guaranteed against malfunction due to defects in materials and workmanship for three years beginning at the date of original purchase If such a mal function occurs the product will be repaired or replaced at our option without charge during the three year period if delivered to the Vega factory Warranty does not extend to damage due to improper repairs finish or appearance items or malfunction due to abuse or operation under other than the specified conditions nor does it extend to incidental or consequential damages Some states do not allow the exclu sion o
13. routed through a compression limiter similar to the receiver cir cuits This compressor operates in a linear fash ion below 0 776 Vrms input or will have a limit of 3 dBm increase if that level is ex ceeded This limiter may also be bypassed by a jumper selection The output of the microphone circuits 1s normally muted and is gated on by the PTT switched in the handset or micro phone A jumper is available to simultaneously mute the speaker during the time the PTT is initiated so that audio feedback is eliminated The output of the microphone circuit 1s bussed though switches to the transmit line output am plifiers and to the speaker amplifier output so that the user may select which line or the speaker that the microphone input circuit can be applied to 6 6 Sum Audio The 1505 has a sum audio input circuit and a sum audio output circuit which allows matrix operation with several modules This allows the expansion of receive input channels or transmit line channels For example using three 1505s one receive input channel can be switch selected for up to twelve channels out put or conversely twelve receive channels may be mixed into one transmit channel 6 7 Controls Each receive input and microphone input can be muted externally from the rear panel by a switched low input this allows remote muting by an external source of the various inputs A PTT unmutes the microphone audio amplifier by the PTT switch on the handset or the
14. 39 2 UIA khi T NE570 A 600 600 BO S T T2 En MER 2 e ANA e OU R78 Ed 100pF JP11 A 4 M348 0 1uF 33K MI 8 5 3 Sa INN O A p 8 Balanced 2 5 T R77 R16 Line _ R111 a d 100 E nn 520 K T Input 620 3 151165 10K 001u 33K B P P1 29 MR 6 U3 B UU lt O 10KiOk i e MUTE lt gt 5 gt i RXAGND Y A RA tT MC660 VRI de DS6 ST 5 1K m P1 31 D6 lt E e e 1N4148 zle _ P1 6 C15 Mute T 0 1uF A Vv C7 TP6 e o 330pF _ l Transmit 2 a Bay R55 sa Tx Amplifier Mr TP11 V Rx Ch 2 sh pn Receive Amplifier TP2 Compressor Limiter e m NN Level 7 Q 2K R10 p o PI i es I E U7 B 2 s c Adjust Tx Ch 2 C5 RN2 Rive MOD a Im y E R74 R15 J AA 10V e AS eco Lo 02 xe e TS 5 m 1 0uF 10K 200F Rx ANN LO dg e 2 col 3 ANNO 10 e AAN 18 uE Unbalanced a P1 20 Qu p o 220K 35 eu 8 3 O 4 620 1 6 R119 P1 57 Input e AR Level e R76 e oO AAP LMC660 ANN R34 473 Adjust Ce As 100K S Hi A 039 We ass R57 ses 0 Balanced 6 amp W ANNA 1 0u 5 8 6 10K Line _ RXAGND a d 1 0uF 15 13 GTO WNM 54K r i R121 P1 38 0 B i 11 U5 B 10 vR2 DI Y a M m saba P1 21 a 500K e gt i 0 z R35 5 CU1 B a a U NE570 NC AM C25 600 600 SE lt T T6 O NE e ANN e 0 10V e 4 10K LM348 33K 18 3 12 R72 E i WHEEL Re ai JP13 5 0 1uF By 100pF Balanced 23 ts ds RUE AR R73 R61 Line
15. 6 1964 Description CONN JUMPER PLUG CONNECTOR 36PIN STRIP TIN TEST POINT YELLOW 055 MNT Ckt Sym JPI JPZ JP3 JP4 JP5 JP6 JP JP8 JP9 JP10 JP11 JP12 JP13 JPI JE JP3 JP4 JP5 JP6 JP JP8 JPY JP10 JP11 JP12 JP13 TPI TP2 EPO TP4 TP5 TP6 TP7 TP LP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 TP19 TP20 13 Part No 286 2011 299 0303 318 0246 318 0259 425 0178 425 0210 425 0488 425 0529 425 0530 534 0001 538 0075 614 0434 Description CONN PCB MODULAR 4PIN HS SWITCH 6PST DIP XFORMER 10K CT 10K CT XFORMER 600CT 600CT INT CKT NE570N IC OPAMP LM348 QUAD OPAMP QUAD LMC660 OV INP IC CMOS SW DG212B 4XSPST IC LM2937 ET 10 VOLT REG SCREW PH 4 40X1 4 NYLOK NUT KEP 4 40 HEAT SINK TO 220 21C W Ckt Sym Jl S1 S2 S3 S4 S5 TI T2 15 T6 T3 T4 T7 T8 U5 U6 U8 ul U9 WZ U3 U4 UT 011 I VEGA JR T EL Eo signaling Product Company 8601 East Cornhusker Highway Lincoln Nebraska 68507 NOV 2000 Phone 402 467 5321 800 752 7560 Fax 402 467 3279 Printed in USA E mail vega telex com Web www vega signaling com
16. VEGA II TELE Xo signaling Product Company 1505 Audio Line Driver Service Manual NICO 1505 MIXER LINE DRIVER CHAN CH2 CH3 CH4 SPKR PTT 098 0355 Table of Contents General Standard Features Installation Connections Operation Theory of Operation 1505 Specifications Parts List GO JO Vi da 0 N m 1 General The Vega Model 1505 Audio Line Driver is a general purpose card that provides a reliable means of remotely controlling a variety of cus tomer specified devices The card 1s flexible It can perform basic switching functions custom ized switching functions via jumpers or spe cial user defined functions It plugs into a Tellabs Type 10 or equivalent open frame rack and can be used in conjunction with any re mote control console 2 Standard Features Four balanced line inputs switchable Four single ended inputs switchable One microphone input from front panel or connector e Jumper options for carbon electret or dy namic microphone elements Four balanced 600 ohm line outputs One watt eight ohm speaker output 2 Vdc operation e All receive inputs can be individually muted by rear panel switch low inputs 2 1 Optional Features include e Jumper selected receive input compression User switch programmable mixing function for example one input can be switched to any or all outputs e Jumper selectabl
17. c microphone ele ments Also included is a compressor limiter circuit to maintain system levels The output of the handset microphone amplifier circuit is routed to the switch matrix An on board voltage regulator maintains proper voltages for optimum performance 6 2 Receive Amplifier This amplifier is a jumper selectable 600 ohm or 10k ohm high impedance balanced input that is adjustable from a range of 30 dBm to 10 dBm Each receive amplifier has an unbalanced input with an input level of 0 025 Vac to 2 5 Vac each The amplifier output is adjustable and 1s accessed through the front panel The output level for each receive amplifier is normally setup for a level of 0 776 Vrms at the test point For example channel one s test point 1s TP3 Operation is the same for all four receive inputs 6 3 Compression Limiter Circuit This circuit amplifies and limits the output of the receive inputs ensuring uniform audio lev els from all channels regardless of the input level received from the external line input For a 30 dB gain once achieving the compression level only a 3 dB increase in output level without distortion results in the circuit Normally the input level at 0 dB allows the limiter to amplify in a linear fashion below that level and above the 0 776 will limit the output to no more than a 3 dB rise above that point A jumper allows the bypass of the compressor circuit The compressor circuit is the same for al
18. e 600 ohm or 10K ohm high input impedance 3 Installation Caution ESD Sensitive This piece of electronic equipment con tains electronic components known to be susceptible to Electro Static Discharge ESD Precautions have been taken to avoid the effects of ESD however the user is encouraged to promote safe handling techniques in the handling storage and service of this equipment 3 1 Introduction Only experienced technicians familiar with similar types of equipment should attempt to install the 1505 Only basic hand tools are re quired to remove the card change Jumper set tings connect phone signal and power lines Read this section thoroughly before attempting to install the card Exercise care to prevent wir ing errors and equipment damage 3 2 Inspection Carefully unpack the equipment and inspect it thoroughly as soon as possible after delivery If any part of the equipment has been damaged in shipment report the extent of the damage to the transportation company immediately This unit has been inspected and adjusted to its recommended operation condition at the fac tory Unless it has been handled roughly in shipment abused or tampered with it won t re quire further adjustments Simply make the in stallation connections as described in the fol lowing sections 3 3 Mounting This card is intended to be mounted in a Tellabs Type 10 or equivalent open frame rack To avert erroneous operation d
19. ections 4 1 Power connections Connect positive 12 Vdc to pins 55 and 56 Connect the 12 Vdc return normally ground to pins 39 and 40 For best performance use at least 20 AWG or larger wire for power connec tions 4 2 Signal Connections and Card Edge Con nector Pin Assignment Refer to the schematic and Table 4 shows the 1505 s pin assignments and has a blank for any customized functions that might be configured for the appropriate pin number to make connec tions Use at least 24 AWG wire for signal connections 4 3 Special considerations for optional wiring 4 3 1 Receive Compressor Limiter Jumpers Each receive channel has a compressor limiter circuit which helps provide a consistent audio level If some external equipment already in cludes compressor limiters these circuits may be bypassed by changing the associated jumper s position For example moving JP6 from the A in to the B position out by passes Rx Ch 1 s Compressor Limiter Refer to Table 1 and the schematic for the appropri ate jumper selection Function Jumper Status Notes In Out A Coupled Separate N A N A N A N A N A Mic Comp Lim In Rx Ch 1 Comp Lim In Rx Ch 2 Comp Lim In Rx Ch 4 Comp Lim In Rx Ch 3 Comp Lim In RX Ch 3 600Q 10KQ RX Ch 1 600Q 10KQ RX Ch 4 600Q 10KQ RX Ch 2 600Q 10KQ Mic PTT Speaker Mute Mic Carbon Element Mic Electret Element In Mic Dynamic High Out Mic Dynamic
20. ency Response 1 2 dB 100 Hz to 10 KHz Crosstalk Line to Line 55 dB min S N 10 dBm Input 65 dB min 10 8 Part No 012 0085 031 0226 065 0463 071 0566 102 0120 102 0290 102 0400 102 0420 103 0001 104 0767 110 1340 112 1606 1505 Parts List Description PCB SUB ASSY 1505MIX LINE TEXT SPEC 1505 AUD MIX LD PCB 1505 AUD MIX LIN DR SCHEMATIC 1505 MIX LINE D CAP CER 20P 5 50V S2L CAP CERIOOP S2L 5 50V CAP CER 330P S2L 5 50V CAP CER 390P S2L 5 50V CAP CER 001 10 50V Y5P CAP TANT IUF 35V CAP CER IMF SMALL CAP ELEC 10MF 25V Ckt Sym CI6 C17 C20 CI C3 C10 Cll C12 C13 C14 CIS C18 CZ C27 C30 C63 C70 C72 C74 C78 C79 C57 C44 CSI C57 C66 C77 11 Part No 112 1608 112 1609 112 1645 112 1671 112 1675 112 1689 112 1691 130 0777 130 0778 130 0779 130 0780 132 0009 Description CAP ELEC 1 0MF 20 25V CAP ELEC 100MF 20 25V CAP ELEC 4 7UF 25V MINI CAP ELEC 22 UF 25V 10 RD CAP ELEC I0UF 16V RAD CAP ELEC 470 MF25V RAD CAP ELEC 220UF 25V RES VAR 1 0K LOG CERMET RES VAR 10K LOG CERMET RES VAR 50K LOG CERMET RES VAR 500K LOG CERMET RES 1 4W ZERO OHM JUMPER Ckt Sym C33 C34 C35 C36 C40 C4 C42 C43 C46 C48 C49 C50 C54 C55 C56 C58 Col C62 C64 C65 C28 CZY C38 C45 52 C59 C60 C71 C73 C67 C68 C80 C8
21. l four receive channel circuits Each receive input can be muted by an external switched low input from the rear panel A front panel LED mute indicator alerts the operator that the channel 1s muted The output from each receive channel is bussed through various switches and is switch selectable by the user to have the au dio appear at any one of four line outputs or a speaker output 6 4 Transmit Line Amplifier This bridging amplifier drives a 600 ohm bal anced line with an output level adjustable from 15 dBm to 10 dBm The output level is adjust able through the front panel Each transmit am plifier 1s also a mixer which allows the mixing of any one or all four receive channels mixed into one transmit line amplifier NOTE The speaker amplifier circuit is no longer useable the IC required to drive this cir cuit has been obsolete by the manufacture and there is no substitute being manufac tured at this time Should you have any quiestions regarding the speaker amplifier circuit please call 1 800 752 7560 Ext 29 for further informaion REVISIONS DESCRIPTION DATE ED TO PRODUCTION 20APR95
22. on t install the card adjacent to equipment that generates high temperature or electromagnetic radiation Al ways provide an appropriate service loop on in terconnecting cables 3 4 Access for Installation Servicing When installing into a Tellabs Type 10 or equivalent open frame rack ensure the front and rear of the rack have clear access for card installation and wiring To service remove the 1505 from the rack or place on a circuit card extension for access while troubleshooting 3 5 Power Primary power for the card is a regulated source of 12 Vdc cu 7 t5 6 R12 16 R25 R34 ors oy ta uw lt m Cl w 123456 S cow 1030011 2 _ S m 1 o BS x8 ani NU w N 23456 C5B oz e z S5 C72 T ETT CC 53 9 O O O O 13 ren r2 pe 1P15 IP TP17 14 z x 350 L LEO 3O GI gt 10 O eo 20 o KO TP18 RS OD O Ll O 88 15 P1 gn JP13 RH R 52 YS NI JOYA Y A33 990 590 cal Figure 1 1505 Component Location 2 4 Connections Warning High Voltage Remove Power Before Servicing High voltage may be present on this card if used for switching phone lines with super imposed dc current signaling which could cause serious injury or loss of life Only qualified personnel familiar with this type of circuitry should work on this equipment To prevent injury damaging the card or other equipment remove power before making conn
23. panel labels MUTE LE tL 057 0 1uF h T 10uF la A 12 E VR2 4 8V LMC660 SPARE GATES a 3 16V P M348 ae a i RW BE R103 tL c68 ANN DG212B 15 0K T 10uF 672 R71 0 16 sn ohn Mika 1 16V O uF e La MICAGND V E G A e gt aa E A MARK IV COMPANY e e o e e ANN R 0 MODEL NEXT ASSY 1905 Audio SPKRAGND TXAGND MICAGND RXAcND 1505 012 0085 Mixer Line Driver E ES Z NO INFORMATION GIVEN HEREIN MAY BE DISCLOSED TO OTHERS WITHOUT WRITTEN 0 1 0 2 6 6 PCB 065 0463 PERMISSION FROM MARK IV CORPORATION SCALE 1 1 8 7 6 9 4 3 2 1
24. r limitation of incidental or consequential damages so the above limitation may not apply to you This warranty gives the customer spe cific legal rights and there may be other rights which vary from state to state 1505 Specifications Operating Temperature Ran c 0 C to 60 C Power Requirements 11 to 16 Vrms semi regulated 250 mA nominal 600 Q 10K Q Balanced Receive Line Input Level 30 dBm to 10 dBm adjustable 10 K Q 10 K Q Unbalanced Receive Input Level 0 025 Vrms to 2 5 Vrms adjustable 10 K Q 10K Mic Input Sensitivity 0 010 Vrms to 1 0 Vrms adjustable LOK O 10K Q Summing Input Level 0 dBm 0 776 Vrms nominal Receive Amplifier Disforfion 1 THD max Receive Frequency Responsc 1 2 dB 100 Hz to 10 KHz Compression Range 30 dB increase in signal output increases less than 3 dB Summing Levcl 0 dBm 0 776 Vrms nominal Balanced Transmit Line Output Level 15 dBm to 10 dBm 600 Q Line Transmit Amplifier Distortion 1 THD max 0 dBm Transmit Frequency Response 1 2 dB 100 Hz to 10KHz Summing Amplifier Output Level 0 dBm 0 776 Vrms nominal Summing Amplifier Distortion 1 THD max 0 dBm Summing Amplifier Frequ
25. ransmit 2 R43 ca Tx T Rx Ch 4 a TP8 La TP15 LANAS Amplifier p o PI Receive Amplifier o Compressor Limiter NTT Leve P o PI IMRE e U7 D 50K Adjust Tx Ch 4 P1 7 C17 C19 e C52 S4 RN4 Le PA e p M Ba B t 14 15 1 12 2 gd LOG R12 a EOB ey Tor ANN wa SP AES 1 ic als 10 WN Unbalanced E B 1 0uF 20pF mE ak nH T ro Mem FERA AU 620 Mae R118 P1 33 E Input AR Level e Se e GO WN LMC660 STE AA gt R32 4 v 3 Adjust S Due eH e to ot 5l AAAW R47 IE 0 Balanced eV ANNO C50 15 10uF 100K BB 6 R45 S 10K Line RXAGND 2K 15 14 O v wwxe 5 1K R120 P1 34 Mb R2 1 0uF 6 7 7 5 4 Output 500K C48 D M e320 RANA NN 4 u RO _ PIES R31 Ut p LOG e jl NE570 VR2 DO NC V 022 600 600 e AAN s gt a R53 1 0uF 10K 15 12 14 ANN 7 R81 10V 6 10K 16 9 fe Z x a i 120 3 4 LM348 O 1uF 33K 33K A 100pF gt tL C51 Balanced i x R82 R51 mur 620 13 6 5 1K S 3 10K T 001uF 33K y 620 bo P1 1 C46 A U2 D 1 0uF MUTE 13 gt S 10K 10K il R49 ol sE RXAGND we W VRZ 8 wy tT C660 VR1 a B P1 3 D5 r lt LoP lt p Mute pes ME BI T Ue MOY NOL exist Om All 090089 T i T 0 1uF Bde x TP13 O e m gt Sum Audio Out E HANDSET oi Summing A Speaker 10V C76 Amolifi Amolifi mi 0 MICROPHONE Compressor Limiter ka POS PIE 100pF R105
26. t may drive up to twelve 600 ohm line outputs Each input 1s mu table and the control 1s a switched low on the rear panel connector A PTT from the micro phone or handset will gate on the microphone amplifier and is also jumper selectable to mute the speaker to inhibit crosstalk 5 3 Controls and Indicators Front panel LEDs light when the corresponding receive channel or speaker 1s muted and when the microphone or handset PTT switch is acti vated Table 4 Card Edge Connector Pin Assignments Solder Side Function User Connection Ch 4 Rx Bal Line In Ch 4 Rx Mute Ch 4 Rx Bal Line In Ch 4 Rx UnBal Line In Ch 3 Rx UnBal Line In Ch 3 Rx Bal Line In Ch 3 Rx Bal Line In Ch 2 Rx Bal Line In Ch 3 Rx Mute Ch 2 Rx UnBal Line In Ch 2 Rx Bal Line In Ch 2 Rx Mute Ch 1 Rx Unbal Line In Ch 1 Rx Bal Line In Ch 1 Rx Bal Line In Ch 1 Rx Mute Ch 4 Tx Bal Line Out Ch 3 Tx Bal Line Out Ch 2 Tx Bal Line Out Pos 12 Vdc Return Gnd Ch 1 Tx Bal Line Out No Connection Sum Audio Out Mic Audio In Mic PTT N A No Connection milololv gt N lt xsl lt c Hlo wvlvzizi ale I nmoolv gt TMSO ZN lt x E lt c Ho wu zz r x z nmojo v gt Position 12 Vdc Input Component Side Function User Connection
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