Rohde & Schwarz CMU200 - RX Spurious Response; Image Rejection; RX SSB Phase Noise

Manual Test Procedure CMU
1100.4903.82 1.14 E–4
Test: ½ The suppression of the signal at twice and three times the input frequency is
measured relative to the input signal.
Preparation:
Test setup RX3
Generator = f
in
; level = –2 dBm
Control: ½ Set CMU to connector RF4 IN, Max Level = 0 dBm.
Test: ½ The suppression of the signal at twice and three times of input frequency is
measured relative to the input signal.
RX Spurious Response / Image Rejection
Preparation: Test setup RX3,
Generator = f
in
; level = 0 dBm.
Control: ½ Set CMU to connector RF2, Max Level = 2 dBm, Mode = Low Distortion
Test: ½ The suppression of the spurious or image signal is measured relative to the
input signal.
Preparation:
Test setup RX3,
Generator = f
in
; level = –2 dBm.
Control: ½ Set CMU to connector RF4 IN, Max level = 0 dBm, Mode = Low Distortion
Test: The suppression of the spurious or image signal is measured relative to the input
signal.
RX SSB Phase Noise
Preparation: Test setup RX3,
Generator = f
iCMU
+ df ; level = 10 dBm.
Control: ½ Set CMU to connector RF2, Max Level = 10 dBm and to desired frequency.
½ Switch on frequency-selective power meter.
Test: The measurement is taken with a small test bandwidth at different carrier offsets.
Note: The input level is +10 dBm, RBW = 100 Hz
--> Phase noise = measured value –10 dB –21 dB.