Rohde & Schwarz CMU200 - TX Fixed Spurious Signals; TX Residual am; TX Residual FM; TX SSB Phase Noise

Manual Test Procedure CMU
1100.4903.82 1.12 E–4
TX Fixed Spurious Signals
Fixed spurious signals are checked.
Preparation: Test setup TX5, no external trigger.
Analyzer: Center = specified test frequency, RBW = 100 kHz, Span = 1 MHz.
Control: ½ Set CMU to connector RF3 OUT, specified setting frequency, specified level.
Test: The suppression of the signal is measured at the test frequency relative to the set
signal.
TX SSB Phase Noise
Preparation Test setup TX5, no external trigger
½ Connect spectrum analyzer or modulation analyzer to RF3 OUT.
Control: ½ Set CMU generator to specified RF frequency.
Output level at RF3 OUT 0 dBm,
Analyzer to specified center frequency,
Span = 50 kHz to 5 MHz, RBW = Span/500,
Noise measurement function.
Test ½ Measure the phase noise at the specified spacing from the carrier.
TX Residual FM
Preparation: Test setup TX5, no external trigger.
½ Connect spectrum analyzer or modulation analyzer to RF1.
Control: ½ Set CMU generator to the specified RF frequency.
Output level at RF1 –27 dBm, analyzer to specified center frequency, FM
demodulator.
Test: ½ The residual FM with the specified weighting is measured.
TX Residual AM
Preparation: Test setup TX5, no external trigger.
½ Connect spectrum analyzer or modulation analyzer to RF1.
Control: ½ Set CMU generator to specified RF frequency.
Output level at RF1 –27 dBm, analyzer to specified center frequency, AM
demodulator.
Test: ½ The residual AM with the specified weighting is measured.