R&S SM300
Manual Test Procedure
Version 04
79
Service Manual SM300: 1147.1652.00
Instrument Part No SM300: 1147.1498.03
2.4.8.2 AM Frequency Response
Test setup
Test setup1 with modulation analyzer
Settings on SM300
LEVEL 0 dBm
FREQ 222 MHz
MODULATION AM DEPTH 60%
LFGenFreq 10 Hz to 20 kHz
Measurement
1.
Determine modulation frequency response by varying the LF generator
frequency.
2.
Repeat measurement with external sinewave generator with setting
MODULATION EXT. (Setting on sinewave generator: 1 Vpeak)
The modulation frequency response is the difference between the
highest and lowest modulation depth.
2.4.8.3 AM Distortion
Test assembly
Test setup1 with modulation analyzer
Settings on SM300
LEVEL 0 dBm
FREQ 111 MHz
MODULATION AM DEPTH 30%, 80%
LFGenFreq 1 kHz
Measurement
Read distortion on modulation analyzer.