Annex: Remote Control - Commands
R&S NRP
1144.1400.12
Annex - I.20
E-2
•
Reflection coefficient of the source (source gamma,
Γ
): Reflections at the power source may
distort the result. If the reflection coefficient of the source is known, it can be specified for the
measured-value correction via command path
SENS:SGAM
.
Example:
*RST
SENS:SGAM:CORR:STAT ON
(considers the reflection coefficient
Γ
of the source)
SENS:SGAM:MAGN 0.01
(magnitude of
Γ
)
SENS:SGAM:PHAS 179
(phase angle of
Γ
)
INIT
FETCh?
Configuration of CALCulate blocks
The function of the CALCulate blocks has already been explained. Its most important task is the
calculation and provision of measurement results.
Calculation function and relative measurement
The calculation functions mentioned in connection with high-level commands are internally implemented
via commands
CALC:MATH
and
CALC:REL:STAT
.
Keyword for selecting a calculation function with
high-level commands
Corresponding low-level commands (
n
,
m
=1,2,3,4)
:DIFF
(Difference)
CALC:MATH "(SENSn-SENSm)"; REL:STAT OFF
:DIFF:REL
(Difference with reference value)
CALC:MATH "(SENSn-SENSm)"; REL:STAT ON
:RAT
(Ratio)
CALC:MATH "(SENSn/SENSm)"; REL:STAT OFF
:RAT:REL
(Ratio with reference value)
CALC:MATH "(SENSn/SENSm)"; REL:STAT ON
:SWR
(Standing wave ratio)
CALC:MATH "SWR(SENSn)"; REL:STAT OFF
:RLOS
(Return loss)
CALC:MATH "RLOS(SENSn)"; REL:STAT OFF
:REFL
(Reflection coefficient)
CALC:MATH "REFL(SENSn)"; REL:STAT OFF
Example:
*RST
CALC:MATH "(SENS1/SENS2)"
(processes sensors 1 and 2)
CALC:REL:STAT ON
(relative measurement)
CALC:REL 23 dB
(sets reference value)
INIT:ALL
(starts measurements on all sensors)
FETCh?
