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VXI 3002 manual External FM frequency response ALC on, Hz DC

Models: 3002

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(5)On the modulation meter check that the FM reading is between 47.5 kHz and 52.5 kHz, then set a reference using the relative function.

(6)Set the function generator to each of the frequencies shown in Table 5-25 checking that the relative readings on the modulation meter are within specification.

(7)At those frequencies indicated in Table 5-25, set the modulation meter LF output control to mid-position and measure the AF distortion on the audio analyzer, checking that the results are within specification.

0 Hz (DC)

To measure the FM deviation at DC, it will be necessary to use the DC offset facility on the function generator proceeding as follows:

(8)Set the function generator to +1.4142 V DC (temporarily connect the function generator output to the DVM and set this voltage as close as possible to +1.4142 V).

(9)Press CARRIER ERROR on the modulation meter.

(10)Set the function generator to −1.4142 V DC (temporarily connect the function generator output to the DVM and set this voltage as close as possible to −1.4142 V).

(11)Measure the frequency indicated on the modulation meter carrier frequency window.

FM1 _____

(12)Reset the function generator to 1V RMS, 1 kHz sine wave and measure the FM deviation.

FM2 _____

(13)Using the following formula, calculate the change in response checking that the result is within the specification shown against 0 Hz in Table 5-25.

	20 log10		2FM2

			FM1

External FM frequency response (ALC on)

Test procedure

(1)Connect the test equipment as shown in Fig. 5-8.

(2)On the UUT set:

Carr Freq	15 MHz
RF Level	0 dBm
Mod Mode	FM External
FM1 Level	10 kHz
Source On
Mod On
ALC coupling

(3)Set the function generator to give 0.75 V RMS, 1 kHz sine wave.

(4)On the modulation meter select CAL, FM, 10 Hz 300 kHz filter.

(5)On the modulation meter check that the FM reading is between 9.5 kHz and 10.5 kHz, then set a reference using the relative function.

(6)Set the function generator to each of the frequencies shown in Table 5-26 checking that the relative readings on the modulation meter are within specification.

(7)Set the function generator to 1.25 V RMS and repeat (4) to (6) using Table 5-27, also measuring the AF distortion on the audio analyzer at those frequencies indicated.

5-13

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VXI 3002 manual External FM frequency response ALC on, Hz DC

Contents

3002 3002 Intended audience StructureDocument conventions ChapterContents Preface Patent protectionSymbols Symbol DescriptionGeneral conditions of use Electrical hazards DC supply voltageFire hazard Toxic hazardsBeryllia Beryllium copperInstallation Suitability for useSymboles signalant un risque Symbole Nature du risqueConditions générales d’utilisation Sécurité électrique tension d’alimentation continueRisque lié au feu Le BérylliaBronze au béryllium UtilisationPage Gefahrensymbole Symbol GefahrenartAllgemeine Hinweise zur Verwendung Elektrische Schläge GleichspannungsversorgungBrandgefahr Warnung vor giftigen SubstanzenBeryllium Oxid Beryllium KupferSimboli di pericolo Condizioni generali d’usoPericoli da elettricità alimentazione a c.c Simbolo Tipo di pericoloPericolo dincendio Pericolo sostanze tossicheBerillio Rame berillioCaratteristiche d’uso Símbolos de peligro Condiciones generales de usoNivel peligroso de electricidad tensión de alimentación DC Símbolo Naturaleza del peligroPeligro de incendio Aviso de toxicidadBerilio Berilio-cobreIdoneidad de uso Contents Main featuresChapter IntroductionIncrementing Frequency sweepMemory TriggersPerformance data Phase Modulation Frequency ModulationFSK Pulse ModulationSweep Mode Internal LF GeneratorExternal Modulation Input Frequency StandardVersions, options and accessories SafetyElectromagnetic CompatibilitySafety Certificate Ref. No. DC230Reference No Title Qualifying NotesSetting logical address List of figuresInitial visual inspection Ventilation requirementsInstalling in VXI mainframe Routine safety testing and inspectionVisual inspection RectificationFront panel connectors and indicators CleaningPutting into storage Switching on Disk installation/loading instructionsDevice listening elements IntroductionDevice talking elements Program messages ProgrammingCompound headers Common commands and queries Ieee Program dataMessage exchange protocol MnemonicDevice dependent commands OPCDefault settings Instrument default settingsCfrq Carrier frequencyCFRQ? RF level RflvRFLVLIMIT? RFLV?RFLVOFFS? Output Output controlOUTPUT? Modulation mode Valid Mode Combinations TableMode MODE?MOD Modulation controlMOD? Frequency modulation and FSK FM or FM1 or FM2Dcfmnl FMMODF? or FM1MODF? or FM2MODF?Phase modulation PM or PM1 or PM2PMMODF? or PM1MODF? Amplitude modulation AM or AM1 or AM2AM? or AM1? or AM2? Pulse Pulse modulationPULSE? Memory stores Memory storeCarrier store Full storeRecalling default settings Memory-recallMemory erase Memory sequencingMemory triggering Memory protectionMtrig MTRIG?Sweep Sweep operationSWEEPCFRQ? Sweep mode SWEEP?Halt Cont Reset Retn Xfer Sweep controlTrigger source SourcesTrigger TRIGGERSOURCE?RF level Atten. lock Setting dBm Min. dBm Max. dBm From Attenuator holdAttenuator lock ranges AttenPower-up options Reverse power protectionOperating hours Reading error messagesFrequency standard selection Status byte Status data structure register model Standard event registers ESE ESE?Hardware event registers HSE?Coupling event registers CSE?Instrument event registers SSE SSE?Error Queue Queue flag detailsStatus byte when read by *STB? SRE SRE?Status byte when read by serial poll Service Request Generation Service Request Enable Register#Summary of status reporting commands and queries Error handling Background errorsForeground errors Error queueError Messages Background errors 500 599 in priority orderForeground errors 0 Ieee 488.2 errors 400 Frequency generation ModulationControl Block schematic diagram Acceptance Testing Test precautionsRecommended test equipment Executable soft front panel softwareSpecification Description Minimum specification ExampleRF output Test equipmentRF level frequency response Test procedureALC linearity Attenuator accuracy MeasuringCarrier frequency accuracy CounterHarmonics Spectral puritySpectrum analyzer Non-harmonics Residual FMSSB phase noise SSB phase noise test set-upInternal FM FM deviation and distortionFM scale shape External FM frequency response ALC off, DC coupled Carrier errorHz to 100 kHz External FM frequency response ALC on Hz DCPhase modulation Phase modulation flatnessAM depth and distortion Figure recorded in 5 20 log10 Figure recordedAM scale shape Test procedure Hz to 30 kHzExternal AM frequency response ALC off, DC coupled DVM Pulse modulation RF level frequency response 10 Pulse modulation test set-upPulse modulation on/off ratio Function generatorModulation oscillator Pulse modulation rise and fall timeModulation oscillator frequencies Modulation oscillator distortion and LF output flatnessExternal frequency standard input 15 External standard test set-upFor 3002 Signal Generator, serial number RF output at −4 dBmRF output at +7 dBm RF output at +25 dBm +19 dBmALC linearity at 2.5 MHz RF level dBm RF level min DBm Result dBm RF level maxALC linearity at 950 MHz ALC linearity at 1200 MHz ALC linearity at 1900 MHz ALC linearity at 2400 MHz Attenuator test at 2.6 MHz RF level dBm RF level min Result dBm RF level max DBm10 Attenuator test at 480.1 MHz 11 Attenuator test at 1199 MHz 12 Attenuator test at 1875.1 MHz 13 Attenuator test at 2399 MHz 14 Carrier frequency tests Frequency MHz Frequency min Result MHz Frequency max15 Carrier harmonic tests at −4 dBm 16 Carrier harmonic tests at +7 dBm 17 Carrier harmonic tests at +13 dBm 18 Carrier harmonic tests at +19 dBm 21 SSB phase noise test 19 Carrier non-harmonic tests20 Residual FM test Carrier frequency Residual FM Measured value Hz RMS23 FM scale shape tests at 15 MHz carrier FM deviation kHz Result kHz Min. kHz Max. kHz24 Carrier error test at 1.2 GHz, FM deviation 100 kHz Carrier error Result kHz10.5 30 Internal AM depth and distortion tests at −4 dBm 29 Internal ΦM flatness test31 Internal AM depth and distortion tests at +7 dBm 32 Internal AM depth and distortion tests at +13 dBm 33 Internal AM depth and distortion tests at +19 dBm34 AM scale shape test AM depth % AM depth min Result % Max. %38 Pulse modulation RF output at −7 dBm 39 Pulse modulation RF output at +4 dBm 40 Pulse modulation RF output at +14 dBm Pulse modulation on/off ratio test44 Modulation oscillator distortion and LF output tests Modulation oscillator frequency tests45 External frequency standard tests Acceptance testing Annex aGeneral description OperationTest procedure Spectrum analyzerAnnex-A-3 Table A-1 Pulse mod. RF output at −7 dBm Table A-2 Pulse mod. RF output at +0 dBm Table A-3 Pulse mod. RF output at +16 dBm Table A-5 Pulse modulation rise and fall time test Table A-4 Pulse modulation on/off ratio testResult ns Software Licence and Warranty Indemnity Email info-test@aeroflex.com China ShanghaiUK Stevenage China Beijing