Rohde & Schwarz CMW500 - Measurement Contexts and Views; Control of the Instrument

Remote Control
R&S
®
CMW500
135User Manual 1173.9463.02 ─ 06
5.3.3 Measurement Contexts and Views
Most measurement Firmware Applications are further subdivided into different measure-
ment contexts. In manual control, a measurement context may consist of several views,
providing different types of measurement results. In remote control, measurement con-
texts and views are identified by the fourth- and fifth/sixth-level mnemonics in the com-
mand headers, respectively.
Measurement contexts and views are addressed by different types of commands:
●
Measurement control commands affect the entire measurement context. The same
holds for most measurement configurations.
●
Measurement results are assigned to a particular view. The commands used to define
the measurement statistics and to retrieve results are also view-specific, which makes
it possible to transfer a subset of results actually needed.
Example for context-specific commands
The following measurement control command affects the EPSensor measurement con-
text (external power sensor measurement) in the GPRF:MEASurement firmware appli-
cation:
INITiate:GPRF:MEASurement:EPSensor
The EPSensor measurement context appears as a fourth-level mnemonic. No view type
is specified.
Example for view-specific commands
The following command retrieves the results in the EVMagnitude:DSSS view (EVM for
DSSS signals) which is part of the MEValuation measurement context in the
WLAN:MEASurement<i> firmware application:
FETCh:WLAN:MEASurement<i>:MEValuation:TRACe:EVMagnitude:DSSS:
CURRent?
The EVMagnitude:DSSS view is selected via the sixth- and seventh-level mnemonics.
READ...? and FETCh...? queries
The READ...? query is view-specific and calculates only the results needed for a par-
ticular view. This can result in a performance improvement compared to the context-
specific command sequence INITiate...; FETCh...?.
5.4 Control of the Instrument
The following sections describe the control of measurement, generator, and signaling
applications.
Control of the Instrument