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Keysight 86120D and 86122C Multi-Wavelength Meters User’s Guide
2
Using the 86122C
•
Drift Application:
This application has been enhanced for the 86120D
and 86122C.
•
Dropped/added channels:
If the number of channels changed during a
drift measurement, the 86120C would stop the measurement and
generate an error. The 86120D and 86122C indicate if channels have
been dropped or added, and continues the drift measurement. The
query CALC3:DATA? DROP returns the peaks that have dropped or
reappeared during a drift measurement.
•
Wavelength masks:
The 86120D and 86122C create wavelength masks
for each laser line, which limit how fast channels can drift without being
measured as dropped. With each measurement sweep, these masks
re-center around laser lines that have drifted less than 0.002 THz.
•
Peak threshold:
The 86120C peak threshold could only be set to a
relative value. The 86120D and 86122C peak threshold can be set to a
relative or absolute value. The command CALC2:PTHR:MOD allows you
to select between an absolute or relative peak threshold, and
CALC2:PTHR:ABS allows you to set the absolute value.
Differences in Remote Commands
•
CALC1:TRAN:FREQ:POIN:
For the 86120C, this command selected the
normal (MAX) or fast (MIN) update mode. For the 86120D and 86122C,
this command remains for backward compatibility. Without changing
the resolution of the 86120D and 86122C, this command configures the
queries SENSE:DATA? and CALC1:DATA? to return the number of data
points used by the 86120C. To return all the data available with the
86120D and 86122C, use the new parameter EXT1
(CALC1:TRAN:FREQ:POIN EXT1).
•
SENS:CORR:ELEV:
For the 86120D and 86122C, this command has no
effect, and remains for backward compatibility only. There is no need to
enter an elevation for the 86122C because it has an internal weather
station.
•
CALC3:DATA? DROP:
For the 86120D and 86122C, this query returns
the peaks that have dropped or reappeared during a drift measurement.
•
CALC2:PTHR:MOD:
For the 86120D and 86122C, this command allows
you to select between an absolute or relative peak threshold.
•
CALC2:PTHR:ABS:
For the 86120D and 86122C, this command allows
you to set the absolute peak threshold value.
Содержание 86120D
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