Keysight Technologies 86120B, User Manual

Page: 166 / 273

164
Programming Commands
CALCulate2 Subsystem
PEXCursion
Sets the peak excursion limit used by the Keysight 86120B to determine valid laser
line peaks.
Syntax
:CALCulate2:PEXCursion{?| {<integer> | MINimum | MAXimum | DEFault}}
<integer> represents logarithmic units in dB. Valid range is 1 to 30 dB.
Constant Description
MINimum 1 dB
MAXimum 30 dB
DEFault 15 dB
Attribute Summary Non-sequential command
Preset State: 15 dB
*RST State: 15 dB
SCPI Compliance: instrument specific
Description A laser line is identified as a valid peak if its amplitude is greater than the peak
excursion plus the amplitudes of the closest local minima on either side of the peak.
This command works in conjunction with the peak threshold setting.
Refer to
“PTHReshold” on page 165 . Changing the peak excursion limit causes the instru-
ment to reprocess the current set of data. Refer also to “Defining Laser-Line Peaks”
on page 52 .
The query response is the current value. For example, if the current value is set to 15
dB, the following value is returned:
15
Non-sequential command
Always use an *OPC? query or a *WAI command to ensure that this command
has the time to complete before sending any more commands to the instrument.
Refer to “Always force the Keysight 86120B to wait for non-sequential com-
mands” on page 92
for more information.