Rohde & Schwarz NRT 1080.9506.02/.62, Operating Manual

Page: 116 / 194

SENSe Subsystem NRT
1080.9506.02 3.36 E-6
:SENSe<n>:POWer:REFLection:RANGe:LIMit:DETect INBound | OUTBound | HIGH
This command defines the conditions for a logic high level (> 2.7 V) being output at the AUX T T L
connector if this connector has been defined as a monitoring output for the reflection indication
(eg with the command POWer:REFL:RANGe:LIMit ON).
OUTBound A high level is output if the measured reflection value is out of
the range defined by the scale limits of the righthand bargraph.
INBound A high level is output if the measured reflection value is within
the range defined by the scale limits of the righthand bargraph.
HIGH A high level is output if the measured reflection value exceeds
the upper scale limit of the righthand bargraph.
Example:
:SENS1:POW:REFL:RANG:LIM:DET INB
*RST value: HIGH
:SENSe<n>:POWer:REFLection:RANGe:LOWer -1999.0..+1999.0|MINimum|MAXimum|DEFault
This command defines the lower scale limit for the righthand bargraph (reflection indication).
Since the entry is made without unit, the following should be observed:
•
The meaning of the entered numeric value depends on the display mode selected. The value
1.0 may mean matching (SWR indication) or total mismatch (indication of reflection coeffi-
cient).
•
The entered numeric value remains the same when another display mode is selected (SWR,
return loss, reflection coefficient or reverse power) so that a change of the display mode also
changes the meaning of the scale limit.
•
For the entered scale limit to become effective, the automatic scaling of the bargraph has to
be switched off. The following commands set the lower scale limit to an SWR of 1.0:
Example:
:SENS1:POW:REFL:RANG:AUTO OFF
:SENS1:POW:REFL:RANG:LOW 1.0
*RST value: 0.00
:SENS1:FUNC
"
POW:REFL
"
:UNIT1:POW:REFL SWR
:SENSe<n>:POWer:REFLection:RANGe[:UPPer] -1999.0..+1999.0 |MINimum |MAXimum |DEFault
This command defines the upper scale limit for the righthand bargraph (reflection indication). The
entry is made without unit. For further details see above (entry of lower scale limit).
The following commands set the upper scale limit to a reverse power of 100 W:
Example:
:SENS1:POW:REFL:RANG:AUTO OFF
:SENS1:POW:REFL:RANG 100
*RST value: 1.0
:SENS1:FUNC
"
POW:REV
"
:UNIT1:POW W
:SENSe<n>:SWR
The NRT offers the possibility of monitoring the load matching and giving an acoustic alarm in
case of high mismatch. The commands under this node are used to define the limit value for the
SWR and the response threshold for the forward power.
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135-1095-0799