R&S SMU200A Test Procedures
1007.9845.82 1.37
E-12
Synchronous AM with FM
Test assembly
See section "
Standard Test Assembly for Analog Modulations",
page 1.3.
Measurement Settings on DUT:
RF
On
Level 0 dBm
Frequency Modulation menu:
LF Gen Frequency 1 kHz
Source Internal
FM deviation 40 kHz.
Settings on spectrum analyzer
AMPTD / REF LEVEL test level + 6 dB,
FREQ / CENTER test frequency
FMDEMOD,
FMDEMOD ON,
RESULT DISPLAY / AM / AF Spectrum
AF Start = 0 Hz
AF Stop = 5 kHz
RES BW = 30 Hz
DEMOD BW = 100 kHz
IF BW MANUAL 10 MHz,
RANGE / REFERENCE VALUE 0.2 %
MEAS TIME 3 ms
Read the AM depth at 1 kHz modulation frequency from the
dem
odulated AF spectrum.
Recommended settings
CF sweep
10
MHz, 250 MHz, 500 MHz, 812 MHz, 940 MHz,
1067 MHz, 1194 MHz, 1321 MHz, 1484 MHz, 2200 MHz,
4000 MHz, 6000 MHz.
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