Application Examples CMU
1100.4903.12 4.100 E-10
Application Examples
The following section is intended as a short introduction to possible applications of option CMU-B17.
For detailed information refer to the relevant application notes.
Bit Error Rate Measurements on Digital Receivers under Fading Conditions
1. CMU 200 / CMU-B17 in combination with SMIQ / SMIQ-B14
IQ/IF scenario: Fading Path or Bypass w. I/Q IF OUT
CMU200
IQ Out
Signal-
generation
CMU-B17
SMIQ
incl.
SMIQB14
RF
DUT
IQ/IF scenario: Bypass w. I/Q IF OUT
CMU200
IQ Out
Signal-
generation
CMU-B17
RF configuration
incl.
level settings
SMIQ
incl.
SMIQB14
RF
RF
DUT
The CMU incl. option CMU-B17 in combination with R&S signal generator SMIQ incl. IQ fading simula-
tor option SMIQB14 can be used for receiver Bit Error Rate tests under fading conditions. The IQ output
of CMU-B17 transmitter (TX) path feeds the signal into SMIQ’s IQ input. The SMIQ forwards the faded
RF signal directly to the receiver (RX) of the DUT. The illustrated test setups depend on the test sce-
nario selected on option CMU-B17.
For more information please refer to R&S application note 1MA07_0E: SMIQ as Fading Simulator for
External Signals.
2. CMU 200 / CMU-B17 in combination with fading simulator ABFS
IQ/IF scenario: Fading Path
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