Command reference
R&S
®
ZNL/ZNLE
675
User Manual 1178.5966.02 ─ 19
"Effective“ means:
●
Only points within the sweep range and only active limit checks are considered.
●
Disabled limit line segments (
CALCulate<Chn>:LIMit:SEGMent<Seg>:TYPE
●
Both linear/logarithmic interpolation and limit line formulae are supported.
●
If there are overlapping limit line segments, only the tighter limit is reported.
Query parameters:
<TraceName>
String parameter containing the trace name
Return values:
<Data>
Limit points, either in ASCII or block data format, depending on
the current
One limit point = one value (y-axis) per sweep point (x-axis).
“No limit point” is reported as Not a Number, which is the string
“-NAN(IND)” in ASCII and a float testing true for “isnan”.
If there is no effective limit point, an empty response is returned.
Example:
*RST
:SENSe1:FREQuency1:STARt 1 GHZ; STOP 5 GHZ
:SENSe1:SWEep:POINts 5
After a reset, modify the default trace 'Trc1'.
:CALCulate1:LIMit1:DATA 1, 1000000000,
2000000000, -40, -30
:CALCulate1:LIMit2:DATA 1, 4000000000,
5000000000, -30, -40
Define upper limit lines for freqency ranges [1 GHz, 2 GHz] and
[4 GHz, 5 GHz]
:CALCulate1:LIMit1:POINts:UPPer? 'Trc1'
Query the limit lines. Returns an empty string, because limit
checking is inactive.
:CALCulate1:LIMit1:STATe ON
Activate limit checking.
:CALCulate17:LIMit1:POINts:UPPer? 'Trc1'
Returns
-40,-30,-NAN(IND),-30,-40
, where
-NAN(IND)
is related to the center frequency
3 GHz
, whose trace value is
not limited.
Usage:
Query only
Manual operation:
See
CALCulate<Chn>:LIMit:SEGMent<Seg>:AMPLitude:STARt
<Response>
CALCulate<Chn>:LIMit:SEGMent<Seg>:AMPLitude:STOP
<Response>
These commands change the start or the stop response values (i.e. the response val-
ues assigned to the start or stop stimulus values) of a limit line segment. A segment
must be created first to enable the commands (e.g
See also
Chapter 9.4.1.1, "Rules for limit line definition"
VNA command reference
