Rohde & Schwarz SML01, Руководство по эксплуатации

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Test sequence R&S®SML / R&S®SMV03
1147.7621.12 10.46 E-6
Vary the frequency from 1 MHz to 30 MHz on the signal generator
and measure the modulation sidebands on the analyzer (CENTER
FREQ. = test fre modulation frequency).
The result level for a sideband frequency is the average value of
the left and the right sideband level.
For evaluation, determine the difference between the highest and
the lowest sideband.
The modulation frequency response is the difference between
the highest and the lowest sideband. .
Residual carrier and leakage
Test equipment Spectrum analyzer (Table 5-1, item 2).
Test setup Connect the spectrum analyzer to the RF output of the R&S
SMV03.
Measurement Settings on R&S SMV03 Test level Pvm
max
,
Test frequencies 395, 600, 936, 1250, 1801, (2200), 3301, 5099,
5501, (4400), 6400 MHz, unmodulated
Select State Off inthe menu Vector Mod
Settings on analyzer
Center frequency = test frequency , Span 1 MHz,
Reference level = test level
Scale 10 dB/div.
First measuere the unmodulated level as a reference.
Then switch on vector modulation with open inputs (State IQ) and
measure the residual carrier.
The residual carrier in dBc is the level of the residual signal
found reffered to the output signal of the DUT without modulation
(dBc = reffered to he carrier
Set Impairment State On and Leakage 10% on the SMV=3
The residual carrier should increase 10% (-20 dBc).