Technical Specification R&S CMU-B17
1100.4903.12 TI.6 E-3
Applications
Bit Error Rate measurements on digital receivers under fading conditions
R&S CMU in combination with R&S SMIQ (R&S SMIQ provides
the faded RF signal)
R&S CMU200 setting: Fading Path or Bypass w. I/Q IF OUT^
R&S CMU200 setting: Bypass w. I/Q IF OUT
The R&S CMU incl. option R&S CMU-B17 in combination with signal generator R&S SMIQ incl. IQ
fading simulator option R&S SMIQB14 can be used for receiver (RX) Bit Error Rate (BER) tests under
fading conditions. The IQ output of R&S CMU-B17 transmitter (TX) path feeds the signal into R&S
SMIQ’s IQ input. The R&S SMIQ forwards the faded RF signal directly to the receiver (RX) of the Device
Under Test (DUT). The illustrated test set-ups are depending on selected mode of option R&S CMU-
B17. In Bypass w. I/Q IF OUT mode it is recommended to reduce to minimum the RF level of non faded
traffic channel.
For more information please refer to R&S application note 1MA07_0E „SMIQ as Fading Simulator for
External Signals“.
CMU200
IQ Out
Signal-
generation
CMU-B17
RF configuration
incl.
level settings
SMIQ
incl.
SMIQB14
RF
RF
DUT
CMU200
IQ Out
Signal-
generation
CMU-B17
SMIQ
incl.
SMIQB14
RF
DUT
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