Basic Instrument Functions
R&S
®
CMW500
104User Manual 1173.9463.02 ─ 06
4.4.10 Digital IQ
The "Digital IQ" section is only present if the R&S CMW500 is equipped with an I/Q board
(option R&S CMW-B510x/-B520x).
The settings are not relevant for "external fading" scenarios of signaling applications. But
they apply for example to "IQ out - RF in" scenarios.
Fig. 4-15: Setup - Digital IQ
Ext. Time Delay / Ext. Sample Delay
Inform the instrument about the delays in the individual external I/Q paths. For each I/Q
connector you can enter the delay either in time units or in samples. Relevant delays can
be caused by instruments or devices inserted into the external path, e.g. an R&S EX-IQ-
BOX or an R&S SMU200A.
The entered delay is e.g. used to correct measured round-trip times, the timing of trigger
events or the time relation between downlink and uplink signals.
For background information on the digital I/Q board and many possible test setups
(including fading tests) refer to the User Manual "R&S CMW500 Protocol Testing – Test
Setups and Use Cases" (stock no. 1202.3840.12).
Remote command:
n/a
4.4.11 Fan Control
The fan of the R&S CMW500 is temperature-controlled. The speed of the fan is adapted
dynamically depending on the temperature within the instrument. Three fan control
modes are available.
Setup Dialog
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