3 SCPI
3.3 Instrument-specific Commands
75
Equivalent temperature: 2000K
Hot power
：
10.0dB
Cold power
：
10.0dB
Key path:
Front panel
【
Scale
】
—>[Upper Limit]
[ Lower Limit ]
:DISPlay:TRACe:Y[:SCALe]:LOWer
Function description:
This command is used to set/query the lower limit of the amplitude of the
specified trace.
Setting format:
:DISPlay:TRACe:Y[:SCALe]:LOWer <trace>,<value>
Query format:
:DISPlay:TRACe:Y[:SCALe]:LOWer?<trace>
Parameter description:
<trace> NFIGure: Noise figure, range: [-100.0, 99.99] dB
GAIN: Gain, range: [-100.0, 99.99] dB
YFACtor: Y factor, range: [-100.0, 99.99] dB
TEFFective: Equivalent noise temperature, range: [-100000000, -99990000] K
PHOT: Hot power, range: [-100.0, 99.99] dB
PCOLd: Cold power, range: [-100.0, 99.99] dB
<value> Lower limit
Return value:
<units>
Example:
:DISPlay:TRACe:Y[:SCALe]:LOWer NFIGure,100.0dB
:DISPlay:TRACe:Y[:SCALe]:LOWer? NFIGure
Reset status:
Noise figure: -1.0 dB
Gain: -10.0dB
Y factor
：
0.0dB
Equivalent temperature: 0.0K
Hot power
：
10.0dB
Cold power
：
0.0dB
Key path:
Front panel
【
Scale
】
—>[Lower Limit]
3.3.9 Limit Line
The limit line corresponds to the
【
Limit Line
】
key on the front panel and is used to mark the limit of the
trace. There are 1
4 independent limit lines. They can be used for traces 1 and 2 and can also be set to
the upper or lower limit. When the test trace goes beyond the limit line, a “limit line fails” prompt is given.
The commands include: limit line number selection, limit line type, test trace selection, display on-off, test
on-off, and limit line table edit.
[ Limit Line Selection ]
:CALCulate:LLINe
Function description:
This command is used to set/query the limit line.
Setting format:
:CALCulate:LLINe 1|2|3|4
