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Remote control commands
R&S
®
NRX
328
User Manual 1178.5566.02 ─ 09
13.7
Calculation functions
Further information:
●
"Channel Calculation Function"
●
Chapter 13.3, "Addressing measurements and power sensors"
13.7.1
Selecting a calculation function
CALCulate<Measurement>:MATH[:EXPRession]
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CALCulate<Measurement>:MATH[:EXPRession]:CATalog?
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CALCulate<Measurement>:MATH[:EXPRession]
[<expression>]
Selects a channel calculation function that processes the results of one or two power
sensors. The result of this calculation is made available as a measured value.
SENSn
is assigned as primary sensor,
SENSm
as secondary sensor.
Table 13-4: <expression> parameters for absolute power measurements
Channel calculation func-
tion
<expression>
Description
Single measurement
"(SENSn)"
Measured value of sensor
A, B, C or D
Sum
"(SENSn+SENSm)"
Sum of the values measured by sensor
n
and sensor
m
Difference
"(SENSn-SENSm)"
Difference between the measured values of
sensor
n and sensor
m
With n and m= 1, 2, 3, 4 or A, B, C, D
Table 13-5: <expression> parameters for relative power measurements
Channel calculation func-
tion
<expression>
Description
Ratio
"(SENSn/SENSm)"
Quotient of the values measured by sen-
sor
n and sensor
m
Standing wave ratio
"SWR(SENSn,SENSm)"
Standing wave ratio. No output unit.
SENSm/SENSn
SENSm/SENSn
1+
1-
Sensor
n measures the forward power of a
wave.
Sensor
m measures the reflected power.
With n and m = 1, 2, 3, 4 or A, B, C, D
Calculation functions