Test Procedures R&S SMB
1407.0806.82 1.42 E-5
PhiM Distortion
Test Method
FFT Demodulation (see chapter "Test ")
Measurement
Settings on DUT:
RF On
Level 0 dBm
Phase Modulation menu:
State on
PhiM Source Internal
PhiM Mode Normal
LFGen Frequency 10 kHz
Settings on R&S FSQ:
see chapter "Test "
SWEEP / MEAS TIME 2.5 ms,
FREQ / AF STOP 50 kHz,
AMPTD / REF LEVEL 0 dBm,
FREQ / CENTER test frequency.
Read THD from the Display. To convert to percent calculate
THDpct = 100 * 10 ^ (THDdB/20).
Recommended settings
CF sweep
Recommended test frequencies
with PhiM deviation 1 rad: 10 MHz, 375.1 MHz, 500 MHz, 625 MHz,
750 MHz,
with PhiM deviation 2 rad: 1100 MHz,
with PhiM deviation 4 rad: 2200 MHz,
with PhiM deviation 8 rad: 3200 MHz, 6 GHz
Repeat measurement with changing settings to
PhiM Mode Low Noise
PhiM deviation 2.5 rad
for test frequencies: 375.1 MHz, 750 MHz
Repeat measurement with changing settings to
PhiM Mode High Deviation
PhiM deviation 10 rad
for test frequencies: 375.1 MHz, 750 MHz
To Next Page
Loading...
