HP 8444A User's Manual
Contents
1. AC Voltmeter AC Voltmeter Frequeney Counter Test Oscillator HF Signal Generator VHF Signal Generator UHF Signal Generator Digital Voltmeter Compatible with Tracking Generator Part of System Frequency markers spaced 100 MHz apart Frequency Accuracy 0 01 Output Amplitude 30 dBm to 1 5 GHz Frequency Range 500 kHz 4 GHz Amplitude Accuracy 1 dB Frequency Range 0 01 12 GHz Accuracy 1 Power Range 20 to 10 dBm Frequency Range 10 Hz to 10 MHz Voltage Range 1 mV to 300V Calibration 10 to 2 dB 10 dB between ranges Accuracy 5 at 10 MHz Voltage Accuracy 3 of full seale Voltage Range 300V full scale Input Impedance 10 megohms Frequency Range 500 kHz 50 MHz 200 MHz 3 0 GHz Frequency Accuracy 0 01 Frequency Range 10 Hz 10 MHz Frequency Accuracy 3 Output Amplitude 3 Vrms Output Impedance 50 ohms Frequency Range 1 50 MHz Output Amplitude gt 0 dBm Frequency Accuracy t 1 Output Impedance 50 ohms Frequency Range 50 450 MHz Output Amplitude gt 0 dBm Output Impedance 50 ohms Frequency Range 450 1200 MHz Output Amplitude 0 dBm Output Impedance 50 ohms Voltage Accuracy 0 2 Voltage Range 1 30 Vde Polarity Automatic Indication 141T Spectrum Analyzer System HP 8406A Comb Generator HP 85538 8555 A 8552B 141T Spectrum Analyzer System HP 432A Power Meter with HP 8478B Therm istor2. O THIRD LO INPUT Type BNC connector Input for Spectrum Analyzer third LO 500 MHz Norm ally used with 8555A RF Section Parallel with front panel THIRD LO INPUT which is normally used with 8554B RF Section ACCESSORY OUTLET Line power outlet Con nected to power line module input Provides ac outlet for use by accessory equipment Note See Table 1 4 for HP part numbers of inter connecting power cords Line power module 115 230V 48 440 Hz Line input Connects to external ac power source Supplies ac power to ACCESSORY OUTLET when connected to external power source 115 230V Switch Line voltage slide switch controls power supply input connections Check that switch is set for nominal voltage of ac line To change setting remove power cord from line input 5 slide protec tive cover aside extract fuse with FUSE PULL 7 and slide switch to desired position Replace fuse with a fuse of the value indicated for the desired switch position Fuse extractor and switch lock Prevents line switch from being actuated until fuse is extracted Line input fuse Rating of fuse to be used is marked near line voltage slide switch setting corresponding to nominal ac supply voltage Figure 3 2 Model 8444A Tracking Generator Rear Panel Controls and Connectors Model 8444A t 434 A FRACKING GENERATOR SINGO MH HEWLETT PRERARD FALTO DISPLAY SECTION NEWLEYY PACKARD RANA KOBE Nein sere WRI
3. ON THE IN STRUMENT the protective earth termi nals of the instrument must be connected to the protective conductor of the mains power cord The mains plug shall only be inserted in a socket outlet provided with 1 1 General Information protective earth contact The protection must not be negated by using an exten sion cord power cable without a pro tective grounding conductor Interruption of the protective ground ing conductor inside or outside the instrument or disconnection of the pro tective earth terminal is likely to make this instrument dangerous Intentional interruption of the earth ground is pro hibited Servicing this instrument often requires that you work with the instrument s pro tective covers removed and with ac power connected Be very careful the energy at many points in the instrument may if contacted cause personal injury With the ac power cable connected the ac line voltage is present at the terminals of the power line module and at the LINE power switch Be very careful Bodily eontact with this voltage can be fatal ICAUTIONS BEFORE SWITCHING ON THIS IN STRUMENT make sure instrument s ac input is set to the voltage of the ac power source BEFORE SWITCHING ON THIS IN STRUMENT make sure that all devices connected to the instrument are con nected to the protective earth ground BEFORE SWITCHING ON THIS IN STRUMENT make sure the line power mains plug is connected to
4. 0 MHz with the 85554 Frequency Accuracy 10 MHz 85548 15 MHz 8555A using spectrum analyzer tuning dial Can be substantially improved using external counter output Spectral Purity Residual FM peak to peak Tuning Section Stabilized Unstabilized 8554B 8555 A 200 Hz 10 kHz Harmonic Distortion Typically 25 dB below output level Nonharmonie spurious Signals gt 35 dB below output level Flatness 0 5 dB Long Term Stability Drift typically less than 30 kHz hour when stabilized after 2 hour warmup Sweep Width 20 kHz to 1250 MHz 85548 or 1300 MHz 8555A Sweep Rates Selected by Scan Time per Division on spectrum analyzer 16 internal scan rates from 0 1 msec div to 10 sec div in a 1 2 5 sequence Manual Scan is available with the external sweep voltage from the 8444A or by a front panel control of the 8552B IF Section PRECISION FREQUENCY MEASUREMENTS An external counter output is provided on the 8444A for precision frequency measurements The frequency of unknown signals as well as the frequency of any point on a frequency response curve can be measured The use of the HP 5300A 5303A Counter is suggested for frequency measurements to 500 MHz and the HP 5245L 5254C Counter for measurements to 1300 MHz Frequency Accuracy For unknown signals 10 kHz Tracking drift typically 5 kHz 10 min after 2 hour warmup For points on frequency response curve counter accuracy Residual FM Counter Mode o
5. Al HEWLETT y PACKARD OPERATING AND SERVICE MANUAL TRACKING GENERATOR 8444A INCLUDES OPTION 058 SERIAL NUMBERS This manual applies directly to instruments with serial numbers prefixed 1323A With modifications described in Section VIL this manual also applies to instruments with serial num bers prefixed 1033A 1139A 1147A 1208A and 1215A For additional important information about serial numbers see INSTRUMENTS COVERED BY MANUAL in Section 1 Valuetronics International Ine 1 800 552 8258 MASTER COPY Copyright HEWLETT PACKARD COMPANY 1972 3273 AIRWAY DRIVE SANTA ROSA CALIFORNIA U S A Manual Part No 08444 90012 Microfiche Part No 08444 90043 Operating Supplement Part No 08444 90014 Printed JANUARY 1975 General Information MODEL 8444A Ni rt ath REES Br E AG og ER ito econ at SEN saeco YA war A penzia anne ART an Pl ti a EN AS SECS NO ee PI SONS SEAN 5060 8739 8120 1348 08444 60018 3 Figure 1 1 Model 8444A Tracking Generator and Accessories TEASTA suru Model 8444A Model 8444A General Information SECTION I GENERAL INFORMATION 1 1 INTRODUCTION 1 2 This manual contains all information required to install operate test adjust and service the Hewlett Packard Model 8444A Tracking Genera tor This section covers instrument identification description options accessorie
6. Mount HP 409E AC Voltmeter HP 410C Multifunction Voltmeter HP 5245L Frequency Counter with HP 5254C Frequency Converter HP 652A Test Oscillator HP 606A B HF Signal Generator HP 608E F VHF Signal Generator HP 612A UHF Signal Generator HP 3440A Digital Volt meter w HP 3443A Plug in P Performance Test A Adjustments T Troubleshooting General Information Model 8444A Table 1 3 Test Equipment and Accessories 2 of 3 Minimum Specifications Suggested Model Variable Voltage Voltage Range 102 127 Vac General Radio WOMT3A A T Transformer or Superior Electric UCIM Power Supply Dual De Output Voltage Variable 0 20 Vde HP 6205B Power Supply A T Output Current 0 200 mA Meter Accuracy 3 Control Fine adjustment De Volt Ohm Ammeter Voltmeter HP 412A Volt Ohm A T Voltage Range 1 mV 50 Vde Ammeter Accuracy 1 Input Resistance 10 megohms Ammeter Current Range 1 mA 200 mA Accuracy 2 Ohmmeter Resistance Range 1 ohm 100 megohm Accuracy 5 reading at center scale Coaxial Attenuator Frequency Range DC 4 GHz HP 8491A Option 10 Flatness 0 2 dB Adapter BNC Tee UG 274B U HP 1250 0781 Adapter BNC Female to Type N Male UG 201A U HP 1250 0067 Cable Assembly Coaxial cable with Male BNC connectors HP 10503A PAT 48 inches long Cable Assembiy Coaxial cable terminated with BNC Male HP 10501A connector and with probe and alligator clip Cable Assembly Coaxial cable ter
7. T display for a 23 MHz low pass filter Filter characteristics 3 dB point at approximately 23 MHz 60 dB point at approximately 42 MHz a Spectrum Analyzer 8555A control settings FREQUENCY enla 25 MHz SCAN WIDTH PER DIVISION 5 MHz BANDWIDTH Er 100 kHz INPUT ATTENUATION econ 10 dB SCAN TIME PER DIVISION 0 1 SECONDS LOG LINEAR ran LOG LOG REF LEVEL 10 dBm LOG REF LEVEL Vernier 3 dB VIDBOBILFER aa tias 10 Hz SCAN MODE 2 2a 2 da dos oft UNT SCAN TRIGOE Roura 2 ei AUTO b Tracking Generator control settings Model 8444A Figure 8 7 23 MHz Low Pass Filter CRT Display 3 19 Swept Return Loss Measurement 3 20 Figure 3 8 illustrates the CRT display for a swept return loss or reflection coefficient measure ment A directional bridge HP 8721A was used to separate the incident from the reflected signal The filter under test is the same 23 MHz Low Pass para graph 3 18 Control settings same as paragraph 3 18 except analyzer gain adjusted so that the top graticule line represents 0 dB return loss or total reflection e g a short or open circuit Return loss is greater than 15 dB 00 18 SWR 1 44 over the filter range of 0 to 23 MHz Figure 3 8 Swept Return Loss Measurement CRT Display 3 21 Amplifier Gain and Bandwidth Measurement 3 22 Figure 3 9 illustrates the CRT display for a 1 to 400 MHz amplifier with gain of approxi mately 19 dB A referenc
8. TING SPEED guise a Figure 3 3 Tracking Generator Operation with 8554B Spectrum Analyzer 1 of 2 Model 8444A OPERATING PROCEDURE WITH AN 8554B 1 Check that the 115 230V switch is set to correspond with the available line voltage Refer to Figure 3 2 steps 4 through 8 for switch and fuse information 2 Apply power to Tracking Generator and Spectrum Analyzer 3 Tum Spectrum Analyzer INTENSITY control fully CCW 4 Allow instruments to warm up for at least 30 minutes 5 Perform Spectrum Analyzer Calibration Proce dure Refer to 8554B RF Section Operating Man ual 6 Set Spectrum Analyzer LOG LINEAR controi to LOG LOG REF LEVEL to 0 dBm and BAND WIDTH to 300 kHz 7 Make the following interconnections between Track ing Generator and Spectrum Analyzer a FIRST LO INPUT to FIRST LO OUTPUT b THIRD LO INPUT to THIRD LO OUTPUT c RF OUTPUT to RF INPUT d SCAN OUTPUT to SCAN IN OUT 8 Check that the Spectrum Analyzer controls are set as follows INTENSITY une 12 o clock approx FREQUENCY seca cie 30 MHz BANDWIDTH xo nG BAGA are 300 kHz SCAN WIDTH PER DIVISION 50 kHz INPUT ATTENUATION 2x cuco 10 dB TUNING STABILIZER Yan cS es eos rats On BASE LINE CLIPPER eu KG ween eae as CCW SCAN TIME PER DIVISION 10 1d 12 13 14 16 and adjust TRACK ADJ for maximum signal ampli tude indication on CRT display Adjust Spectrum Analyzer Vernier contro
9. a three conductor line power outlet that has a protective earth ground Grounding one conductor of a two conductor out let is not sufficient BEFORE SWITCHING ON THIS IN STRUMENT make sure the ac line fuse is of the required current rating and type normal blow time delay etc 1 16 INSTRUMENTS COVERED BY MANUAL 1 17 Hewlett Packard instruments carry a serial number see Figure 1 2 on the back panel When 1 2 Model 8444A the serial number prefix on the instrument serial number plate of your instrument is the same as one of the prefix numbers on the inside title page of this manual the manual applies directly to the instrument When the instrument serial number prefix is not listed on the inside title page of initial issue manual change sheets and manual up dating information is provided Later editions or revisions to the manual will contain the required change information in Section VII SERIAL NUMBER PREFIX SUFFIX Figure 1 2 Instrument Identification 1 18 DESCRIPTION 1 19 The Model 8444A Tracking Generator is designed to complement both Model 8554B and Model 8555A Spectrum Analyzer RF Sections The Tracking Generator covers the frequency range of 500 kHz to 1250 MHz when used with the 8554B RF Section and from 10 MHz to 1 8 GHz when used with the 8555A RF Section The Tracking Generator Spectrum Analyzer functions as a system to perform frequency response meas urements Additionally the s
10. e MANUAL SCAN mode the scan can be stopped at any point for frequency measurement CAUTION Do not leave System stopped in MAN UAL SCAN with high INTENSITY Dam age to the display CRT can result Operation Figure 3 10 illustrates frequency measurement at the 30 dB point on a low pass filter a Spectrum Analyzer 8554B control settings FREQUENCY 4 6 od oobosbeeud sean D0 MHZ BANDWIDTH cora iia 300 kHz SCAN WIDTH PER DIVISION 10 MHz INPUT ATTENUATION 10dB SCAN TIME PER DIVISION 10 MILLISECONDS LOG REF LEVEL sisi 000222 cases a DB LOG LINEAR pal Re Gea LOG VIDEO BIETER ge ds KA OFF SCAN MODE 2 ale arene paa ts aka E SCAN TRIGGER 2 3350 ena bate en AUTO b Tracking Generator control settings TRACK ADS nat Peak EEN DONE EEE TEN 0 dBm MANUAL SCAN sawa aata aa c Connect unit under test between Tracking Generator RF OUTPUT and Spectrum Analyzer RF INPUT d Connect Tracking Generator AUX RF OUTPUT to Frequency Counter input e Connect Tracking Generator SCAN OUTPUT to Spectrum Analyzer SCAN IN OUT f Connect Tracking Generator FIRST LO INPUT to Spectrum Analyzer FIRST LO OUTPUT and THIRD LO INPUT to THIRD LO OUTPUT 3 10 Model 84444 g Note point of interest on CRT display h Set Spectrum Analyzer SCAN MODE to EXT and rotate Tracking Generator MANUAL SCAN control clockwise to point of interest i Note and record frequency j S
11. e level is first established by connecting the Tracking Generator output to the Spectrum Analyzer through a 30 dB attenuator and scanning over the range of interest The ampli fier is then connected between the Tracking Gener ator and the Spectrum Analyzer and the same Operation frequency range scanned The Spectrum Analyzer 8554B set to full scan 0 1250 provides a CRT display indication as follows 3 dB bandwidth approximately 500 MHz level at 1 graticule line and zero gain point of approximately 1025 MHz a 30 dB Coaxial Attenuator installed at Tracking Generator RF OUTPUT b Spectrum Analyzer 8554B control settings BANDWIDTH solera ets 800 KHZ SCAN WIDTH 0 1250 MHz INPUT ATTENUATION 10dB SCAN TIME PER DIVISION 10 MILLISECONDS LOG LINEAR 2 4 pe ak rada LOG LOG REF LEVEL 2 240 022 710 dBm VIDEO PIETER ssp ra ees eye OFF SCAN MODE 2448 500 Op aie ae bods eda INT SCAN TRIGGER 4 waw gawa a AUTO c Tracking Generator control settings TRACK ADS ua ned zen Peak A Diocese Oech ra wn biwara Rage DUB Figure 8 9 Amplifier Gain and Bandwidth CRT Display 3 23 Precision Frequency Measurements 3 24 An external frequency counter may be used with the Tracking Generator Spectrum Analyzer System for frequency measurements at any point on the CRT display With the counter connected to the Tracking Generator AUX RF OUTPUT jack rear panel and the system operated in th
12. erial three to four inch layer around all sides of the instrument to provide firm cushion and prevent movement inside the container Protect the control panel with cardboard d Seal the shipping container securely e Mark the shipping container FRAGILE to assure careful handling 8120 1351 8120 1689 Figure 2 1 Power Cable Line Connector Labels Model 8444A Operation SECTION IH OPERATION 3 1 INTRODUCTION 3 2 This section provides complete operation instructions for the HP Model 8444A Tracking Generator Front and rear panel controls connec tors and indicators for the Tracking Generator are identified and described in Figures 3 1 and 3 2 Operational connections and adjustments for the Tracking Generator and an 8554B Spectrum Ana lyzer System are detailed in Figure 3 3 Operational connections and adjustments for the Tracking Generator and an 8555A Spectrum Analyzer Sys tem are detailed in Figure 3 4 Additional operating information is contained in Figures 3 5 through 3 10 3 3 PANEL FEATURES 3 4 Front and rear panel features of the Tracking Generator are described in Figures 3 1 and 3 2 Front and rear panel views of the Tracking Gener ator connected to the HP 8554B 8552 141T Spectrum Analyzer are shown in Figure 3 3 Front and rear panel views of the Tracking Generator connected to the HP 8555 A 8552 141T Spectrum Analyzer are shown in Figure 3 4 For a detailed description of the Spectrum Analyzer co
13. et Spectrum Analyzer SCAN MODE to INT Note The CRT trace dot can be moved in either direction by the Tracking Genera tor MANUAL SCAN control For best frequency accuracy approach frequency measurement point while tuning the MANUAL SCAN control in the clockwise direction Figure 3 10 Precision Frequency Measurement CRT Display
14. f Operation Manual Scan Scan determined either by front panel control of 8552B IF Section or by external scan signal provided by the 8444A Zero Scan Analyzer is fixed tuned receiver Coun ter reads center frequency to accuracy of tracking drift Counter Output Level 0 1 V rms GENERAL SPECIFICATIONS Temperature Range Operation 0 to 55 C storage 40 C to 75 C Power 115V and 230V 48 to 440 Hz 12 watts max 1 3 General Information MANUAL SCAN control on the Tracking Genera tor allows manual tuning of the Spectrum Analyzer Tracking Generator System The ampli tude of the Tracking Generator output is adjust able over a 0 to 10 dBm range by a front panel vernier control The output level is calibrated at 30 MHz to 0 0 5 dBm and maintained by an auto matic level control circuit Refer to Table 1 1 for system performance specifications 1 21 8554L RF SECTION MODIFICATIONS 1 22 Hewlett Packard Model 8554L Spectrum Analyzer RF Section with serial prefixes 1101A and below require modification for Tracking Generator compatibility The modification consists of adding two cables to the RF Section The cables provide front panel access to the first and third LO outputs The modification kit HP Part Number 08554 60056 containing all necessary parts and information is available from any Hewlett Packard Sales and Service Office A list of Sales and Service offices is contained in the back of this manual Serv
15. ice Note 8554L 6 containing the modification procedure is included with the modi fication kit After modification the Service Note should be filed with the 8554L Service Manual 1 23 ACCESSORIES SUPPLIED 1 24 Accessories supplied with the Tracking Generator are listed in Table 1 2 RF cables supplied with the Tracking Generator allow opera tion with either the 8554B or 8555A Spectrum Analyzer RF Sections The power cable supplied with the instrument is selected at time of ship ment Cable selection is based on shipping destina Model 8444A tion Figure 2 1 illustrates the different power cable connectors that are currently available 1 25 EQUIPMENT REQUIRED BUT NOT SUP PLIED 1 26 In addition to the accessories supplied with the Tracking Generator a Spectrum Analyzer System is required to complete the Tracking Gen erator Spectrum Analyzer System The Tracking Generator is compatible with either the 8554B 8552 140 series Spectrum Analyzer System or the 8555A 8552 140 series Spectrum Analyzer System Refer to paragraph 1 11 for modifications to early model Spectrum Analyzer Systems For precision frequency measurements a frequency counter is required for use with the Tracking Generator Spectrum Analyzer System Operating accessorles are listed in Table 1 4 1 27 WARRANTY 1 28 The Hewlett Packard Model 8444A Tracking Generator is warranted and certified as indicated on the inner front cover of this manual Fo
16. indication of trace on CRT display Ten turn control provides adjustment of frequency over a range of approximately MHz LEVEL Adjusts Tracking Generator RF OUTPUT 3 2 5 level over range of O to 10 dBm Level calibrated for O dBm at 30 MHz with accuracy of 0 5 dB Set LEVEL control to 0 dBm for calibrated CRT display on Spectrum Analyzer RF OUTPUT Type N Connector Tracking Genera tor RF output connector Frequency adjusted to track tuning of Spectrum Analyzer by TRACK ADJ 3 Output level adjusted by LEVEL 4 O THIRD LO INPUT Type BNC connector Input for Spectrum Analyzer third LO 500 MHz Norm ally used with 8554B RF Section Parallel with rear panel THIRD LO INPUT which is normally used with 8555A RF Section FIRST LO INPUT Type BNC connector Input for Spectrum Analyzer first LO 2 05 3 3 GHz with 8554L RF Section 2 05 4 1 GHz with 8555A RF Section O SCAN OUTPUT Type BNC connector Manual tune voltage to Spectrum Analyzer 0 to 10 Vdc Voltage level controlled by position of MANUAL SCAN 2 Figure 3 1 Model 8444A Tracking Generator Front Panel Controls Indicators and Connectors Model 8444A Operation REAR PANEL AUX RF OUTPUT Type BNC connector Tracking Generator auxilliary RF output Same frequency as signal out front panel RF OUTPUT connector For use with external frequency counter during precision frequency measurements Terminate in 50 ohms
17. l or Track ing Generator LEVEL control to position signal on CRT LOG REF level graticule line System cali brated at 30 MHz with an amplitude accuracy of 30 5 dB Set Spectrum Analyzer to scan desired frequency range FREQUENCY control adjusted to center of frequency of interest SCAN WIDTH set for desired coverage i insert device to be tested between Tracking Genera tor RF OUTPUT and Spectrum Analyzer RF INPUT Rotate Tracking Generator MANUAL SCAN control fully counterclockwise Set Spectrum Analyzer SCAN MODE switch to EXT Rotate Tracking Generator MANUAL SCAN control elockwise to tune system through selected frequency range For automatic scanning set SCAN MODE switch to INT and SCAN TIME PER DIVISION to desired scan time Figure 3 3 Tracking Generator Operation with 8554B Spectrum Analyzer 2 of 2 Operation EOG EINEAR tagaan aha Lia ah gay aces LOG LOG REF LEVEL nase teak Cee des 0 dBm LOG REF LEVEL Vernier ooooooooooo 0 VIDEO FILTER A oa OOS Waka YON OFF SCAN MODE corista ls a INT SCAN TRIGGER vtr NA aa LINE 9 Set Tracking Generator LEVEL control to 0 dBm 3 5 Operation 1437 DISPLAY SECTION HEWLETT PACKARD 5 AA E RAN IKO IN OPERATING ERVICE MANUAL LINE PUSH IDA 13y 423 2304 2AF LINE JOY LIGA 48 HG YA Tag 1 dat Model 8444A MES SREB LS 4 NG weet er pio ESE 2 MO gb tier STAR Figure 3 4 Tracking Generator Ope
18. minated with BNC Male HP 10501A connector and alligator clips Cable Assembly Coaxial cable terminated with dual banana HP 11003A A plug and probe with alligator clip Cabie Assembly Coaxial cable with dual banana plug and HP 11001A A T Male BNC connector terminations Cable Assembly SMA Male to BNC Male HP 08555 60076 TES Cable Assembly Selectro Female to BNC Male Test Cable HP 11592 60001 A T 36 inches long Cable Assembly Selectro Female to Selectro Male Test HP 11592 60003 A T Cable 8 inches long Adapter BNC Jack to BNC Jack UG 914A U HP 1250 0080 P Performance Test A Adjustments T Troubleshooting 1 6 Model 8444A General Information Table 1 3 Test Equipment and Accessories 3 of 3 Minimum Specifications Suggested Model Use Open end 5 16 inch HP 8720 0030 AT AT No 10 Allen Driver HP 5020 0291 Test lead with alligator clips P Performance Test A Adjustments T Troubleshooting Table 1 4 Operating Accessories HP 8554B RF Section Spectrum Analyzer RF Section with frequency range of 500 kHz to 1250 MHz Model Number RF Section Spectrum Analyzer RF Section with frequency range of 01 to 18 GHz When used with Tracking Generator covers frequency range of 10 to 1300 MHz HP 8555 A HP 140T Display Section HP 141T Display Section HP 8552A IF Section Spectrum Analyzer IF Section compatible with Tracking Generator 10 dB per division log ra
19. n lt 1 dB Average Noise Level gt 102 dBm with 10 kHz IF bandwidth Absolute Amplitude Calibration Range Spectrum Analyzer Log From 122 dBm to 10 dBm 10 dB div on a 70 dB display or 2 dB div on a 16 dB display 8552A has 10 dB div only Linear From 0 1 pV div to 100 mV div 85554 20 mV div 8554B in a 1 2 sequence on an 8 division display Tracking Generator Drive Level to Test Device 0 to 10 dBm continuously variable 0 dBm cali brated to 0 5 dB at 30 MHz Frequency Range 500 kHz to 1250 MHz with 8554B and 10 MHz to 1300 MHz with 8555A Scan Width Determined by Spectrum Analyzer Controls Per Division With 8555A 16 calibrated scan widths from a 2 kHz div to 200 MHz div in a 2 5 10 se quence With 8554B 15 calibrated scan widihs from a 2 kHz div to 100 MHz div in 2 5 10 sequence Full Scan 0 1250 MHz with 8554B 0 1300 MHz with 8555A Zero Scan Analyzer is fixed tuned receiver Frequency Resolution 1 kHz Stability Residual FM peak to peak Tuning Section Stabilized Unstabilized 8554B 8555A 200 Hz 10 kHz Amplitude Accuracy System Frequency Response 1 5 dB Tracking Generator Calibration 0 dBm at 30 MHz to 0 5 dB SWEEP CW GENERATOR The tracking generator spectrum analyzer system can be used to supply test signals for other devices as a sweeper Frequency Controlled by spectrum analyzer Range is 500 kHz to 1250 MHz with the 8554B and 10 MHz to 130
20. nge HP 8552B IF Section Spectrum Analyzer IF Section compatible with Tracking Generator 2 dB per division log range HP 5300A Frequency For precision frequency measurements to 500 MHz 5303A Counter HP 5245L Frequency For precision frequency measurements over frequency range of 0 to 50 MHz 5254C Counter and 150 to 3000 MHz HP 5060 8543 Joining Bracket Kit HP 8120 1575 HP 8120 1576 Spectrum Analyzer Display Section compatible with Tracking Generator Speetrum Analyzer Display Section with storage CRT display capability Compatible with Tracking Generator Hardware and parts for strapping Tracking Generator to Spectrum Analyzer Provides a common ground and secure mounting Accessory Power Cord For accessory instrument operation off of line input to Tracking Generator Plugs mate with accessory outlet connector and line input connector on HP 5060 1189 power line module l Accessory Power Cord For accessory instrument operation off of line input to Tracking Generator Plugs mate with accessory outlet connector and line input connector HP 1251 0148 old type 1 7 1 8 Model 8444A Installation SECTION II INSTALLATION 2 1 INITIAL INSPECTION 2 2 Mechanical Check 2 3 Check the shipping carton for evidence of damage immediately after receipt If there is any visible damage to the carton request the carrier s agent be present when the instrumen
21. ntrols connectors and indicators refer to the appropriate operating and service manuals for those instru ments Interconnection wiring between the Track ing Generator and the Spectrum Analyzer is con tained in Section VIII Service Sheet 1 of this manual i 3 5 OPERATOR S CHECKS 3 6 Upon receipt of the instrument or when the Tracking Generator is to be used with a different Spectrum Analyzer perform the operational adjustment procedures listed in Figure 3 3 or 3 4 3 7 OPERATING INSTRUCTIONS 3 8 General operating instructions are contained in Figures 3 3 and 3 4 These instructions will familiarize the operator with basic operating func tions of the Tracking Generator in use with Spec trum Analyzers Additional operating techniques and information is contained in Figures 3 5 through 3 10 3 9 CONTROLS INDICATORS AND CONNECTORS 3 10 Front and rear panel controls indicators and connectors are identified and briefly described in Figures 3 1 and 3 2 Operational adjustment proce dures are given in Figures 3 3 and 3 4 Additional information to assist the user during instrument operation is given in the following paragraphs 3 11 OPERATING TECHNIQUES 3 12 The following information is provided to acquaint the user with Tracking Generator Spectrum Analyzer operation When a device is placed in the signal path between the Tracking Generator and the Spectrum Analyzer the analy zer detects and displays the fre
22. opriate receptacle the instrument is grounded To preserve the pro tection feature when operating the instrument from a two contact outlet use a three prong to two prong adapter and connect the green or green yellow lead on the adapter to ground 2 15 Power cables are selected for shipment with each instrument with a line connector plug to match the standard power cord for the country of destination on the purchase order A label indicat ing the power cable inside is affixed to the packing case Figure 2 1 indicates the connector plugs and the HP part numbers for the various available power cables and plugs 2 16 OPERATING ENVIRONMENT 2 17 The Tracking Generator does not require forced air cooling when operating at temperatures from O to 55 C 32 to 131 F When operating the instrument choose a location which will provide at 2 1 Installation least three inches of clearance around the rear and both sides Normal air circulation will maintain a reasonable temperature within the instrument 2 18 INSTALLATION CONNECTIONS 2 19 A rack mounting kit is supplied for rack installation Additionally a joining bracket kit accessory can be provided to secure the Tracking Generator to the Spectrum Analyzer Installation instructions are supplied with both joining bracket and rack mounting kits 2 20 Electrical connections are provided by three coaxial cables and two line power cords Coaxial cables connect Spectrum Analy
23. power module rear panel for proper position 115 or 230 volts 2 10 Power Requirements 2 11 The Tracking Generator can be operated from a 48 to 440 hertz input line that supplies either 115 or 230 volt 10 in each case power Consumed power is normally less than 15 watts 2 12 The 115 230 power selector switch on the rear panel line power module must be set to agree with the available line voltage The selector switch is located below the fuse holder and fuse extractor lever An arrow on the selector switch points to callouts listing the line input voltage and fuse amperage rating To change the position of the selector switch it is necessary to remove the power cable slide the protective cover to the left and lift the fuse extractor before the switch can be changed With the fuse extractor extended press down and toward the desired direction Replace fuse with a fuse of the amperage rating for the selected position See Section VI for replacement HP Part Numbers The instrument is normally shipped with fuse installed for 115 volt operation 2 13 Power Cable 2 14 To protect operating personnel the National Electrical Manufacturers Association NEMA and the International Electrotechnical Commission IEC recommends that the instrument panel and cabinet be grounded The Tracking Generator is equipped with a three conductor power cable the third conductor is the ground conductor and when the cable is plugged into an appr
24. quency response of the device under test The Spectrum Analyzer tuning and scan width settings determine the Tracking Generator output frequency and the re sultant CRT display The type of device control settings and typical display is provided for each of the following measurements Crystal Filter Measurement Para 3 13 Bandpass Filter Measurement Para 3 15 a b c Low Pass Filter Measurement Para 3 17 d Swept Return Loss Measurement Para 3 19 e Amplifier Gain and Bandwidth Measurement Para 3 21 f Precision Frequency Measurement Para 3 23 3 1 Operation dy LINE ON OFF Controls primary power to Track Model 8444 A FRONT PANEL RATOR S13 00 Mite ing Generator Light glows when switch is energized Type AIH bulb For access to bulb switch to OFF and pull button straight out 2 MANUAL SCAN Provides manual tuning of Spec trum Analyzer Controls voltage levei at SCAN OUT PUT 8 below Scan trace on CRT determined by position of MANUAL SCAN control For MANUAL SCAN operation connect cable between Tracking Generator SCAN OUTPUT and Spectrum Analyzer SCAN IN OUT Set Spectrum Analyzer SCAN MODE switch to EXT Vary MANUAL SCAN control to tune analyzer through selected SCAN WIDTH TRACK ADJ Adjusts frequency of 1 55 GHz oseilla tor in Tracking Generator so that the RF OUTPUT 5 tracks the frequency tuning of the Spectrum Analyzer Control adjusted for maximum amplitude
25. r further information contact the nearest Hewlett Packard Sales and Service office addresses are provided at the back of this manual 1 29 RECOMMENDED TEST EQUIPMENT 1 30 Table 1 3 lists the test equipment and acces sories required to check adjust and repair the Tracking Generator If substitute equipment is used it must meet the Minimum Specifications listed in Table 1 3 Table 1 2 Accessories Supplied HP Part Number 8120 1348 5060 8739 08444 60017 Line Power Cable Rack Mounting Kit Interconnect Cable Description 7 4 feet 3 wire AC Line Cord Hardware and parts for mounting instrument in 19 inch rack Coaxial cable for interconnection between AUX A connector on Display Section and THIRD LO INPUT on Tracking Generator For use with 8555A Spectrum Analyzer System 08444 60018 Interconnect Cable See paragraph 2 15 and Figure 2 1 18 inch low leakage coaxial cable with BNC connectors Three 3 each supplied Two required for 8555A Spectrum Analyzer System Three required for 8554B Spectrum Analyzer System Connects FIRST LO to FIRST LO THIRD LO to THIRD LO and SCAN OUTPUT to SCAN IN OUT Model 8444A General Information Table 1 3 Test Equipment and Accessories 1 of 3 Suggested Model HP 8554B or 8555 A 8552B Minimum Specifications Spectrum Analyzer System Frequency Range 500 kHz 1 25 GHz Frequency Comb Generator Spectrum Analyzer System Test Analyzer Power Meter
26. ration with 8555A Spectrum Analyzer 1 of 2 Model 8444 A 5 OPERATING PROCEDURE WITH AN 8555A Check that the 115 230 switeh is set to correspond with the available line voltage Refer to Figure 3 2 steps 4 through 8 for switch and fuse information Apply power to Tracking Generator and Spectrum Analyzer Turn Spectrum Analyzer INTENSITY control fully CCW AHow instruments to warm up for at least 30 minutes Perform Spectrum Analyzer Operational Adjust ments 30 MHz Calibration Refer to 8555A RE Section Operating and Service Manual Set Spectrum Analyzer LOG LINEAR control to LOG LOG REF LEVEL to 0 dBm and BAND WIDTH to 300 kHz Make the following interconnections between Track ing Generator and Spectrum Analyzer a FIRST LO INPUT to FIRST LO OUTPUT b THIRD LO INPUT to THIRD LO OUTPUT rear panel connections ce RF OUTPUT to INPUT d SCAN OUTPUT to SCAN IN OUT 8 Check that the Spectrum Analyzer controls are set as follows INTENSITY 45033 12 o clock approx BAND Sinai n 1 2 05 GHz IF FREQUENCY ans aca sede ee yale he 30 MHz BANDWIDTH se 4 5 oros ei 300 kHz SCAN WIDTH PER DIVISION a 100 kHz INPUT ATTENUATION esse re 20 dB TUNING STABILIZER 2 22 tare Dha eek st ON SIGNAL IDENTIFIER 045 804434 wee eek ars OFF BASE LINE CLIPPER ca tec od ake es CCW SCAN TIME PER DIVISION 10 MILLISECONDS Operation POG LINEAR reia pd wala carts LOG LOG REF LEVEL sa
27. s specifications and other basic information 1 3 Figure 1 1 shows the Hewlett Packard Model 8444A Tracking Generator with accessories sup plied 1 4 The various sections in this manual provide information as follows SECTION at INSTALLATION provides infor mation relative to incoming inspection power requirements mounting packing and shipping etc SECTION HI OPERATION provides informa tion relative to operating the instrument SECTION IV PERFORMANCE TESTS pro vides information required to ascertain that the instrument is performing in accordance with published specifications SECTION V ADJUSTMENTS provides infor mation required to properly adjust and align the instrument after repairs are made SECTION VI REPLACEABLE PARTS pro vides ordering information for all replaceable parts and assemblies SECTION VI MANUAL CHANGES nor mally will contain no relevant information in the original issue of a manual This section is reserved to provide back dated and up dated information in manual revisions or reprints SECTION VIII SERVICE includes all infor mation required to service the instrument 1 5 SAFETY CONSIDERATIONS 1 6 General 1 7 This is an International Electrotechnical Com mission Safety Class I instrument This instrument has been designed and tested according to IEC Pub lication 348 Safety Requirements for Electronic Measuring Apparatus safe condition and has been
28. s ara KAG 0 dBm LOG REF LEVEL Vernier 0 600000 iaa 0 VIDEO FILTER vaticano dia OFF SCAN MODE yl nte De de yeaa ise INT SCAN TRIGGER unless boris LINE or AUTO 9 Set Tracking Generator LEVEL control to 0 dBm and adjust TRACK ADJ for maximum signal ampli tude indication on CRT display 10 Adjust Spectrum Analyzer Vernier control or Track ing Generator LEVEL control to position signal on CRT LOG REF level graticule line System cali brated at 30 MHz with an amplitude accuracy of 20 5 dB 11 Set Spectrum Analyzer to scan desired frequency range FREQUENCY control adjusted to center of frequency of interest SCAN WIDTH set for desired coverage 12 Insert device to be tested between Tracking Genera tor RF OUTPUT and Spectrum Analyzer RF INPUT 13 Rotate Tracking Generator MANUAL SCAN control fully counterclockwise 14 Set Spectrum Analyzer SCAN MODE switch to EXT 15 Rotate Tracking Generator MANUAL SCAN control clockwise to tune system through selected frequency range l 16 For automatic scanning set SCAN MODE switch to INT and SCAN TIME PER DIVISION to desired scan time Figure 3 4 Tracking Generator Operation with 8555A Spectrum Analyzer 2 of 2 3 7 Operation 3 13 Crystal Filter Measurement 3 14 Figure 3 5 illustrates the CRT display for a 20 MHz crystal filter Filter characteristics 2 kHz passband with bandwidth at the 60 dB points less than 10 kHz a Spectrum Analyzer 8555A control se
29. supplied in 1 8 Operation 1 9 BEFORE APPLYING POWER make sure the instrument s ac input is set for the available ac line voltage that the correct fuse is installed and that all normal safety precautions have been taken 1 10 Service 1 11 Although the instrument has been designed in accordance with international safety standards the information cautions and warnings in this manual must be followed to ensure safe operation and to keep the instrument safe Service and ad justments should be performed only by qualified service personnel 1 12 Adjustment or repair of the opened instru ment with the ac power connected should be avoided as much as possible and when inevitable should be performed only by a skilled person who knows the hazard involved 1 13 Capacitors inside the instrument may still be charged even though the instrument has been disconnected from its source of supply 1 14 Make sure only fuses of the required current rating and type normal blow time delay etc are used for replacement Do not use repaired fuses or short circuit the fuse holders 1 15 Whenever it is likely that the protection has been impaired make the instrument inoperative and secure it against any unintended operation WARNINGS If this instrument is to be energized through an autotransformer for voltage reduction make sure the common termi nal is connected to the earthed pole of the power source BEFORE SWITCHING
30. t is unpacked Inspect the instrument for physical damage such as bent or broken parts and dents or scratches If damage is found refer to paragraph 2 6 for recom mended claim procedures If the instrument appears to be undamaged perform the electrical check see paragraph 2 4 The packaging material should be retained for possible future use 2 4 Electrical Check 2 5 The electrical check consists of following the performance test procedures listed in Section IV These procedures allow the operator to determine that the instrument is or is not operating within the specifications listed in Table 1 1 The initial performance and accuracy of the instrument are certified as stated on the inside front cover of this manual If the instrument does not operate as specified refer to paragraph 2 6 for the recom mended claim procedure 2 6 CLAIMS FOR DAMAGE 2 7 If physical damage is found when the instru ment is unpacked notify the carrier and the nearest Hewlett Packard Sales and Service office immediately The Sales and Service office will arrange for repair or replacement without waiting for a claim to be settled with the carrier 2 8 The warranty statement for the instrument is on the inside front cover of this manual Contact the nearest Sales and Service office for information about warranty claims 2 9 PREPARATION FOR USE CAUTION Before applying power check the power selector switch on the Tracking Generator input
31. ttings FREQUENCY cas auakd lee da 20 MHz BANDWIDTH cy Gen ae vet maaan 8 kHz SCAN WIDTH PER DIVISION 5 kHz INPUT ATTENUATION sxspaa LOGB SCAN TIME PER DIVISION 20 MILLISECONDS LOG REF EN yd vin ty ernannt 0 dBm VIDEO FILTER socios l 100 Ha SCAN MODE 6 5 e908 x4 nae bla eaten We INT SCAN TRIGGER nen are wee AUTO LOG LINEAR hh tn tot od te Aas a ee vets LOG b Tracking Generator control settings TRACK ADJ mamasa es re Peak LEVEL A eee re ee Harana 0 dBm Figure 3 5 20 MHz Crystal Filter CRT Display 3 15 Bandpass Filter Measurement 3 16 Figure 3 6 illustrates the CRT display for a 50 MHz bandpass filter Filter characteristics 50 MHz 4 pole bandpass filter adjusted for band width of approximately 5 MHz at the 3 dB points Bandwidth at 60 dB points is approximately 32 MHz a Spectrum Analyzer 8555A control set tings FREQUENCY par DO MHZ BANDWIDTH seccional eee kane he 10 kHz SCAN WIDTH PER DIVISION 5 MHz INPUT ATTENUATION 7o cu peas swat LOGB 3 8 Model 84444 SCAN TIME PER DIVISION 0 5 SECONDS LOG REF LEVEL soc rn 0 dBm VIDEO FILTER aac re ner 10 Hz SCAN MODE nee a INP SCAN TRIGGER eu aa sera AUTO LOG LEINDAR ss dia LOG b Tracking Generator control settings TRACK ADJ oia darse tos Peak EEVER pesar anida 0 dBm Figure 3 6 50 MHz Bandpass Filter CRT Display 3 17 Low Pass Filter Measurement 3 18 Figure 3 7 illustrates the CR
32. ystem can be used as a signal generator or sweeper to supply a test signal to other devices An auxilliary output is provided for precision frequency measurements by an exter nal frequency counter 1 20 The Tracking Generator converts the first and third local oscillator LO signals from the Spectrum Analyzer RF Section to a signal that tracks the frequency tuning of the RF Section With the Spectrum Analyzer operating in ZERO SCAN WIDTH the Tracking Generator is a CW signal generator tuned to the frequency of the analyzer In FULL or PER DIVISION SCAN WIDTH the Tracking Generator functions as a sweep oscillator which tracks the analyzer tuning Additionally a Model 8444A General Information Table 1 1 System Specifications These system specifications describe the performance available from the spectrum analyzer tracking generator system in various types of applications In all cases it is assumed that the spectrum analyzer is equipped with either an 8554B or 8555A Tuning Section 8552A or 8552B IF Section 140T or 141T Display Section SWEPT FREQUENCY RESPONSE MEASUREMENTS The tracking generator is used as a signal source to measure the frequency response of a device Dynamic Range gt 90 dB from spectrum analyzer 1 dB gain compression point to average noise level approximately 10 dBm to 100 dBm Spurious responses not displayed Gain Compression For 10 dBm signal level at the input mixer gain compressio
33. zer FIRST LO OUTPUT to Tracking Generator FIRST LO IN PUT THIRD LO OUTPUT to THIRD LO INPUT and SCAN OUTPUT to SCAN IN OUT Double shielded coaxial cables are provided for connection between local oscillator input and output connec tors Refer to Table 1 2 for description and HP part number of cables supplied with the Tracking Generator 2 21 STORAGE AND SHIPMENT 2 22 Original Packaging 2 23 The same containers and materials used in factory packaging can be obtained through the Hewlett Packard Sales and Service offices listed at the rear of this manual 2 24 If the instrument is being returned to Hewlett Packard for servicing attach a tag indicat 8120 1348 8120 1369 Model 8444A ing service required return address instrument model number and full serial number Mark the container FRAGILE to assure careful handling 2 25 In any correspondence refer to the instru ment by model number and full serial number 2 26 Other Packaging Materials 2 27 The following general instructions should be followed when repackaging with commercially available materials a Wrap the instrument in heavy paper or plastic If shipping to a Hewlett Packard Service office or center attach a tag indicating the type of service required return address model number and full serial number b Use a strong shipping container A double wall carton made of 350 pound test material is adequate c Use enough shock absorbing mat
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