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Wavetek 2500, Operating Manual, Page: 1 / 90

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Summary of Contents for 2500

Page 1: ...ENT CON iAINS IN ORMA iION PRC PRIETARY TO WAVETEK AND IS PROVIDED SOLEL Y FOR INSTRUMENi OPERATION AND MAINTENANCE THE INFORMATION IN THIS DOCUMENT MAY NOI BE DUPLICATED IN ANY MANNER WITHOUT THE PRI...

Page 2: ...ntation Contains any changes that must be made to this manual Changes may occur for various reasons Wavetek s product improvement program incorporates the most current technology into these instrument...

Page 3: ...an often be done very reasonably in consideration for adding your manual to our library Typically the scans in our manuals are done as follows 1 Typed text pages are typically scanned in black and whi...

Page 4: ...NON NUMERIC ENTRY 3 5 5 SETTING RF OUTPUT CHARACTERISTICS 3 5 5 1 FREQUENCY 3 5 5 2 POWER LEVEL 3 5 5 3 MODULATION 3 5 6 STORAGE RECALL OF FRONT PANEL SETTINGS 3 5 7 RETURN TO LOCAL MODE OF OPERATION...

Page 5: ...2 2 BOTTOM COVER REMOVAL 5 2 3 AIR FILTER CLEANING 5 3 AUTOCAL CALIBRATION 5 4 USER DIAGNOSTICS 5 5 POWER UP TEST SECTION 6 GPIB 6 1 INTRODUCTION 6 2 INSTALLATION INSTRUCTIONS 6 3 OPERATING INSTRUCTI...

Page 6: ...r Module Wavetek Model 2500 Front Panel Wavetek Model 2500 Rear Panel Recommended Test Equipment Parameter Command Headers Engineering Notation Enumerated Command Listings Enumerated Command Headers D...

Page 7: ...a 10 Hz resolution and 00005 5 ppm accuracy 1 1 SECTION 1 GENERAL INFORMATION 1 1 2 MODULATION CHARACTERISTICS The instrument features both internal and external AM and FM capabilities The internal m...

Page 8: ...the same set tings present when power was removed except the RF output will be off A tripped RF circuit breaker FM overmodulation 1 2 SPECIFICATIONS 1 2 1 FREQUENCY Range MHz Resolution Frequency Sta...

Page 9: ...c Hz guaranteed Typ 110 dBc Hz Typ 115 dBc Hz 65 dBc 30 Hz nus 4 137 49999 MHz 15 Hz rms 137 5 274 99999 MHz 30 Hz rms 275 550 MHz 60 Hz rms 550 MHz 15 Hz rms typical 4 137 49999 MHz 10 Hz rms typical...

Page 10: ...cluding residual FM 2 at internal rates for deviation 100 kHz Type Push buttons Spin Knob 1 2 9 REVERSE POWER PROTECTION Max RF Power 50 W Trip Level 7 W Trip Time Typically 1 mSec Max DC Voltage 50 V...

Page 11: ...erface Functions 14 em 5 5 in High 31 8 em 12 5 in Wide 53 3 em 21 in Deep 12 57 kg 27 7 lbs net 14 38 kg 31 7 lbs shipping 100 or 120 220 or 240 VAC 50 400 Hz IEEE 488 Full Talk Listen Confonns to IE...

Page 12: ...Scans by ArtekMedia 2011...

Page 13: ...er replacement or repair of your instrument without waiting for damage claim settlements 2 1 SECTION 2 INSTALLATION INSTRUCTIONS 2 3 MECHANICAL INSTALLATION 2 3 1 Mechanical installation instruc tions...

Page 14: ...instrument total system is operating properly If the user 6esires to verify operation at specification limits the performance test procedures in Section of this manual must be used The functional test...

Page 15: ...Use the spin knob to set the frequency to 200 MHz Measure the frequency 2 3 2 5 3 2 OUTPUT POWER Set the output frequency at 4 MHz with no modulation Use the keyboard to set the output power level at...

Page 16: ...Scans by ArtekMedia 2011...

Page 17: ...the unit Front panel features are identified by number in Figure 3 1 Each numbered feature is briefly described in the following paragraph with the same number 3 1 SEC ION 3 OPERATING INSTRUCTIONS 1 P...

Page 18: ...d lC J o EJB 15 16 IMm P0 Id m ION 0012 0o 6163 Figure 3 1 Wavetek Model 2500 Front Panel 3 2 Scans by ArtekMedia 2011 ArtekMedia Digitally signed by ArtekMedia DN cn ArtekMedia o ArtekMedia com ou em...

Page 19: ...operation the LCL switch turns on off the display backlighting 3 3 11 FREQ The frequency key initiates cedure to establish the carrier frequency 12 LVL the pro RF output The level key initiates the p...

Page 20: ...tion The operator may select an internal modulation rate of 400 or 1000 Hz with the selected source shown on the display The numeric value for the AM or FM used is shown on the display The digit con t...

Page 21: ...10 MHz square wave internal reference signal may be obtained 2 EXTERNAL REFERENCE IN This is the connector at which an external 1 MHz 5 MHz or 10 MHz signal sign or square wave is applied used 3 5 in...

Page 22: ...ll be performed each time power is applied to the unit 3 6 3 5 2 NUMERIC ENTRIES KEYBOARD AND SPIN KNOB The following front panel operations require numeric entry that can be made using the keyboard a...

Page 23: ...ntry process will be recalled 3 7 If the entered data is out of the range of the function the previous value will be restored to the function and displayed 3 5 2 2 SPIN KNOB CURSOR KEY OPERATION The S...

Page 24: ...ndicated when a small line is placed under the resolution digit in the appropriate display If a new function is to be controlled dif ferent from that currently controlled 3 8 by the knob when the new...

Page 25: ...be restored A fre quency change 10 kHz will not turn off the modulation When the spin knob is used to change the frequency the 3 9 modulation will not be restored until the spin knob has stopped 3 5 5...

Page 26: ...ed output ternal modulating signal of peak to peak 0 353 RHS into load must be provided an ex 1 volt a 600Q 3 10 NOTE If the external modulating signal is not 1 volt peak to peak the output will not b...

Page 27: ...l settings stored in location 15 by the procedures outlined above Section 3 5 6 1 a 3 11 3 5 7 RETURN TO LOCAL MODE OF OPERATION FROM REMOTE GPIB The LCL key will cause the 2500 to exit the Remote Mod...

Page 28: ...lation indicator 3 12 The operator also may set modulation at the desired level and then turn off the modulation and then turn it on again 3 7 CALIBRATION DUE INDICATORS There are two front panel disp...

Page 29: ...s manual If this procedure does not erase the UNLVD message the unit has a problem that will require 3 13 troubleshooting Wavetek offers an optional Service Manual that includes information useful to...

Page 30: ...Scans by ArtekMedia 2011...

Page 31: ...1 SECTION 4 PERFORMANCE TESTS zation The Customer Service Department at the factory is available for consul tation during the regular work week Recommended test equipment is listed in Table 4 1 Test...

Page 32: ...or equivalent Fluke Model BOI0A or equivalent Tektronix 496 492 or equivalent H P B559A or equivalent Hewlett Packard 8568 or equivalent H P 8901A if an equivalent is used a counter may be needed B Me...

Page 33: ...The value of the resolution digit will be increased one step one unit at a time until the entire range is verified The Hodel 2500 resolution per step in each range is indicated below Read the frequenc...

Page 34: ...499 999750 MHz and 500 000 250 kHz 500 000250 MHz 2 Set the 2500 CW output for a value between 4 MHz and 137 5 MHz Record the chosen value Use the frequency counter to verify that the frequency output...

Page 35: ...necessary to establish the 10 kHz digit 0 4QOOO as the resolution digit and then increase the frequency from 4 MHz to 10 MHz in 10 kHz steps Monitor the second and third harmonics on the analyzer at e...

Page 36: ...yzer centered at each of the frequencies shown below Record the worst case sideband level and location for each frequency a 653 26 MHz b 655 26 MHz c 777 26 MHz d 781 26 MHz e 925 26 MHz f 926 26 MHz...

Page 37: ...00 output level set at 7 dBm 4 Repeat step 2 above with the 2500 output level set at 7 dBm 107 dBc Hz at 500 MHz 10 kHz offset from carrier frequency 4 550 MHz An H P 8568 or equivalent spectrum analy...

Page 38: ...8 spectrum analyzer or equivalent will be used to measure switching speed over two frequency changes 6 L Set the 2500 for a 550 MHz output at a 0 dBm level with no modulation 2 Set the H P 8568 spectr...

Page 39: ...er sweep The trace should have settled returned to reference level in less than 2 horizontal screen divisions 200 mSec 7 Push the clear write key on the spectrum analyzer to clear the stored CRT displ...

Page 40: ...the audio output of the modulation analyzer to the audio analyzer input Connect the function generator output to the external modulation input of the 2500 3 AM accuracy and distortion will be measured...

Page 41: ...Repeat step 5 AM accuracy must be within the specified 27 5 32 5 1 range 12 Repeat step 6 Distortion must be less than 1 5 1 13 Repeat steps 11 and 12 for each frequency listed in step 7 above Iii Rep...

Page 42: ...at the 0 dBm level with no modulation 2 Connect the 2500 output to an HP 8902A measure ment receiver or equivalent Select the 50 Hz high pass and 15 kHz low pass post detection band width filters on t...

Page 43: ...below and record the residual FH associated with each Each should be less than 30 Hz rIDS a 125 001 MHz b 275 MHz c 325 MHz d 330 MHz e 390 MHz f 463 MHz g 464 MHz h 550 MHz 5 The user may elect to ch...

Page 44: ...dulation analyzer to the input of the audio analyzer 3 To determine FM accuracy set the 2500 for an output frequency of 275 MHz at the 0 dBm power level Select the internal 1 kHz modulation source Set...

Page 45: ...le observing the relative dB output change on the analyzer Record the change It should be 3 dB or less 13 Disconnect the test equipment To measure deviation range connect the 2500 RF output to a spect...

Page 46: ...b counterclockwise to decrease output power in 10 dB steps Observe the output level on the measurement receiver and verify it is within the range associated with each output level setting below output...

Page 47: ...on digit set at 1 MHz from 4 to 1 MHz set the resolution digit at 1 MHz from 1 MHz to 1100 MHz 3 Set the 2500 output level at 3 dBm Repeat step 2 4 Set the 2500 output level at 7 dBm Repeat step 2 5 D...

Page 48: ...ct the external source a Model 2500 signal generator for example to the external reference input on the rear panel of the 2500 Set the source at 1 volt pealc to pealc and 1 MHz Set the 2500 rear panel...

Page 49: ...DUE DATE __________________________ Test Results SPIN KNOB RESOLUTION FREQUENCY RANGES MHz 2500 RESOLUTION 0 4000Q 0 40010 0 40100 0 41000 0 4001Q 0 401QO 0 41QOO 0 5QOOO 0 20000 1 QOOOO 1 00000 1Q 00...

Page 50: ...frequency at 6 8 Frequency chosen in 550 1100 MHz range 9 Actual frequency at 8 10 All frequencies within specified accuracies HARMONICS TEST SPECIFICATION 30 dBc TEST EQUIPMENT USED CALIBRATION DUE...

Page 51: ...______________________ Test Results Worst Case 50 137 5 MHz range frequency MHz level dBc Worst Case Sidebands 2500 OUTPUT SIDEBAND FREQUENCY FREQUENCY MHZ LEVEL dBc 551 26 MHz 653 26 MHz 655 26 MHz 7...

Page 52: ...nd 7 dBm output _____________________ dBc _____________________ dBc Worst case 551 MHz to 1100 MHz at 7 dBm fo of worst 1 2 fo _______________________ MHz worst 1 2 fo _______________________ MHz wors...

Page 53: ...s FREQUENCY CHANGE MHz 550 to 550 1 550 1 to 550 389 to 389 1 389 1 to 389 TRACE SETTLING TIME mSec SWitching time is within specified limits _____________ 4 9 AM PERFORMANCE TESTS SPECIFICATION AM Ac...

Page 54: ...0 195 3 90 274 3 90 275 3 90 400 3 90 550 3 90 551 3 90 620 3 90 692 3 90 693 3 90 780 3 90 872 3 90 873 3 90 1000 3 90 1100 3 70 11 3 70 137 3 70 138 3 70 194 3 70 195 3 70 274 3 70 275 3 70 400 3 70...

Page 55: ...195 7 90 274 7 90 275 7 90 400 7 90 550 7 90 551 7 90 620 7 90 692 7 90 693 7 90 780 7 90 872 7 90 873 7 90 1000 7 90 1100 7 70 11 7 70 137 7 70 138 7 70 194 7 70 195 7 70 274 7 70 275 7 70 400 7 70 5...

Page 56: ...4 195 274 275 400 550 551 620 692 693 780 872 873 1000 1100 RELATIVE CHANGE ON MODULATION METER dB Accuracies Distortion and AM Bandwidth are within specified limits 4 10 RESIDUAL AM TEST SPECIFICATIO...

Page 57: ...is within specified limits 4 11 RESIDUAL FM TEST SPECIFICATION TEST EQUIPMENT USED Post detection bandwidth 05 15 kHz 30 Hz rms 4 137 49999 MHz 15 Hz rms 137 5 274 99999 MHz 30 Hz rms 275 550 MHz 60...

Page 58: ...FORMANCE TESTS SPECIFICATION PH Accuracy Distortion PH Bandwidth Deviation Range 5 of setting at internal rates excluding residual PH at internal rates for deviation 100 kHz From 20 Hz to 100 kHz with...

Page 59: ...______________________ dB Deviation Range 2500 Output Freguencv MHz Deviation Range MHz 389 user selected value 137 5 275 MHz range Overmodulation Circuitry works as specified ________________________...

Page 60: ...TER READINGS dBm 5 MHz 400 MHz 1100 MHz Output power levels are within specified limits __________________ 4 14 OUTPUT POWER LEVEL FLATNESS TEST SPECIFICATION 1 dB TEST EQUIPMENT USED ________________...

Page 61: ...________________ Test Results Worst Case frequency _________ MHz power level __________________ dBm Output impedance across the frequency range is within specified limits 4 16 EXTERNAL REFERENCE TEST...

Page 62: ...ange 2500 output Frequency MHz Deviation Range MHz 389 user selected value 137 5 275 MHz range Overmodu1ation Circuitry works as specified __________________________ PM Accuracy distortion bandwidth a...

Page 63: ...130 ASSOCIATED POWER METER READINGS dBm 5 MHz 400 MHz 1100 MHz output power levels are within specified limits 4 14 OUTPUT POWER LEVEL FLATNESS TEST SPECIFICATION l dB TEST EQUIPMENT USED ___________...

Page 64: ...Test Results Worst Case frequency ___________________ MHz power level __________________ dBm output impedance across the frequency range is within specified limits 4 16 EXTERNAL REFERENCE TEST SPECIFI...

Page 65: ...er back and remove it Reverse this procedure to re install the cover 5 1 SECTION 5 MAINTENANCE 5 2 3 AIR FILTER CLEANING The air filter is secured to the bottom cover by a metal frame held in place by...

Page 66: ...also will indicate the point in the band being calibrated 5 2 5 3 9 1 The first band point cali brated will be shown as OSC 1 0 The display will then indicate OSC 1 1 as the next point the next higher...

Page 67: ...g calibrated 0 9 in the table below and the actual frequency output at the calibration point also shown in the table below 5 3 INDEX POINT FREQUENCY MHz 0 0 4 1 2 2 10 3 20 4 100 5 300 6 500 7 700 8 9...

Page 68: ...the 2500 will use a flat ness table stored in permanent memory ROM The permanent table is used to avoid possible inclusion of bad index points not adjusted to a 0 dBm output in the RAM table developed...

Page 69: ...3 As the number associated with the diagnostic test is entered it will be shown on the LEVEL display A one or two digit number may be entered to request the tests A single digit I or a two digit 01 e...

Page 70: ...ith this type of instrument Wavetek recommends return of a malfunctioning unit to the factory for repair after factory authorization 5 6 ENTRY NUMBER 01 BUILT IN RAM TEST The built in RAM test verifie...

Page 71: ...keycode associated with each key will be displayed on the FRE QUENCY display For example if the right cursor key is pressed the FREQUENCY dis play will show Code 3E Pressing the numeric 1 key will ge...

Page 72: ...on As the spin knob is turned clock wise the cursor will move from left to right through all three displays When the cursor reaches the rightmost digit of the rightmost display LEVEL display it will...

Page 73: ...1 The main loop unlock indicator LUL 2 The carrier unlevel indicator CUL 3 The 400 Hz feedback clock 400 4 The FH overdeviation indicator Fod 5 The automatic phase control APC While each test is runni...

Page 74: ...in the LEVEL display Key codes are shown in the discussion of the Keyboard Test Section 5 4 10 of this manual 5 5 2 Any error that occurs during the power up test sequence will generate the error mes...

Page 75: ...computer controller 6 1 SECTION 6 GPIB The GPIB command format uses the mini mum uniqueness concept to allow con siderable flexibility in programming the 2500 functions Because of this flexibility th...

Page 76: ...fault HLA can be changed by physically resetting the DIP switch positions a procedure that involves opening up the 6 2 unit see optional Model 2500 Service Manual The MLA can be reprogrammed over the...

Page 77: ...after this required space has been entered spaces may be included anywhere else in the command string at the users option to make the user s program more easily readable for example 6 3 5 3 The numeri...

Page 78: ...r case or any combination of the two 6 3 5 6 The numeric values for the parameter command arguments have the ranges specified as normal ranges for the 2500 signal generator functions The internal modu...

Page 79: ...ders and their associated arguments are shown in Table 6 3 The majority of commands require an alphabetic argument 6 5 Argument characters may be in upper or lower case or any combination of the two T...

Page 80: ...FH NOTE MOD ON is not a valid command The specific modulation desired must be entered as a separate parameter command see section 6 3 5 ff Enable the 2500 to produce service requests Disable all servi...

Page 81: ...rent stored setting wait for the 2500 response and then ask for a recall of the next setting 6 7 The GET command also may be used to simultaneously trigger a group of devices instruments on the GPIB 6...

Page 82: ...nd the associated 2500 response to the command The 2500 responses to commands 10 ERR and SET are discussed in detail in Sections 6 3 8 4 6 3 8 5 and 6 3 8 6 respectively Note that information about 25...

Page 83: ...line 110 a blank space is removed to prevent an illegal response 6 11 In lines 140 and 150 an approximate delay is achieved by using a for next 1000 NOTE The necessary program lines that initialize th...

Page 84: ...utput on After 1 second set the 6 12 internal FH deviation to 500 kHz at 1 kHz modulation rate After 500 milli seconds turn the modulation off WAVETEK 6000 BASIC 100 WRITE 702 FRQ 750HHZ LVL 10DBM HOD...

Page 85: ...1000 Hz MODULATION OFF MODULATION INT AM EXT PM MODULATION EXT AM INT PM MODULATION INT AM MODULATION INT FM MODULATION EXT AM MODULATION EXT PH ID ID WAVETEK 2500 V81 1 Fx x ERR xxx ENGLISH DESCRIPTI...

Page 86: ...ffer will contain the decimal value 128 The decimal values for error classifications available are as follows 97 Command Error 98 Execution Error 99 Internal Error 6X System Events X 0 through 9 The d...

Page 87: ...sage SEL 01 19 will then return to the FREQUENCY display If the GPIB option is installed the following tests are performed 6 13 6 5 2 1 First the RAM on the GPIB board is tested During this test gpib...

Page 88: ...After the successful completion of the test the SEL 01 19 message will be shown on the FREQUENCY display and the operator may proceed with other diag nostics as desired 6 1Lt 6 5 4 If an error is det...

Page 89: ...am 7 1 SECTION 1 HANUAL CHANGES incorporates the latest electronic developments into these instruments as rapidly as development and testing permit Due to the time required to document and print these...

Page 90: ...al purity specifications maintained SPECIFICATIONS TO SP774 The standard specifications for the 2500 apply with the following exceptions Frequency Range 1 1100 mHz Harmonics and output accuracy apply...

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