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Performance Verification
4-15 FM Deviation Accuracy Tests
MG362x1A MM
PN: 10370-10386 Rev. B
4-47
FSWP:
Tab Analog Demod, Meas Config / Display Config / drag “PM Time Domain” to screen center. This will
replace FM measurement with Phase Mod measurement. The “Summary” Display will now show Phase Mod
results.
Meas Config / Demod BW 8 MHz, Meas Time = 350 msec.
Demod Config / Demod / AF Coupling = AC
Demod Config / Demod / Unit / Phase Unit = rad
Scale Config = 500 rad/div.
Trace Config:
Trace 1 Clear/Write, Linear, Smoothing = 1 %.
Trigger button:
Set “PM Offline” as the trigger source.
External Function Generator:
1 kHz, 2Vpp, Channel ON
External DVM:
RMS AC volts, 1V range
MG362x1A:
Low Noise FM mode, Ext FM, DC Coupled, Sensitivity = 2 MHz/V, FM ON.
Test Procedure
1.
Wait 2sec for FSWP to complete the RMS Phase Deviation measurement. Note RMS Phase Deviation
(radians) shown in the FSWP “Summary” window. Also note the DVM RMS AC voltage readout.
2.
Calculate FM Deviation = sqrt(2)*(RMS phase deviation, rad)*(mod rate, Hz).
Note FM Deviation indicated by the DUT.
Calculate “% Error” = 100*((Calculated Deviation)/(Deviation indicted by DUT) – 1)
Record “% Error” for Ext LNFM Accuracy test. If “% Error” is
≥
–2.2 % and
≤
2.2 %, Record “Pass” for Ext
LNFM Accuracy test, otherwise record “Fail”.
3.
Calculate FM Sensitivity = (Calculated FM deviation)/(sqrt(2)*(DVM RMS voltage readout)). Calculate
“% Error” = 100*((Calculated FM Sensitivity)–(2 MHz/V))/(2 MHz/V)
Record % Error for the Ext LNFM Sensitivity Accuracy test. If error is within the ±3 % nominal spec,
report “Pass”, otherwise report “Fail”.
Summary of Contents for Rubidium MG362 1A Series
Page 12: ...Contents 10 PN 10370 10386 Rev B MG362x1A MM ...
Page 16: ...1 9 ESD Requirements General Information 1 4 PN 10370 10386 Rev B MG362x1A MM ...
Page 30: ...2 6 RF Deck Assemblies Functional Description 2 14 PN 10370 10386 Rev B MG362x1A MM ...
Page 66: ...3 11 FM and Phase Modulation Calibration Calibration 3 36 PN 10370 10386 Rev B MG362x1A MM ...
Page 292: ...B 5 Self Test Messages Instrument Messages B 8 PN 10370 10386 Rev B MG362x1A MM ...
Page 293: ......