Keysight Technologies 86120B, User Manual

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159
Programming Commands
CALCulate1 Subsystem
The frequency spacing between values is uniform and is equal to the reference laser
frequency (473.6127 THz) divided by 64K, or 7.226756 GHz. Note the spacing
between values is not uniform in wavelength units. The values returned are in
ascending optical frequency.
The first value of the uncorrected frequency data corresponds to an optical fre-
quency of 181.6879 THz (1650.041 nm). The last value of the uncorrected fre-
quency data corresponds to an optical frequency of 428.2793 THz (699.993 nm).
For example, a laser line peak located at the 1,500th returned value has an optical
frequency of:
or, 1557.195 nm (in vacuum).
When
FAST measurement mode is selected, the uncorrected frequency domain data
consists of 8K (8,192) values. The frequency spacing between elements is uniform
and is equal to the reference laser frequency (473.6127 THz) divided by 8K, or
57.81405 GHz. Note the spacing between values is not uniform in wavelength units.
The values returned are in ascending optical frequency. Only the frequency domain
data corresponding to 700-1650 nm wavelength (in vacuum) is returned (4,268 val-
ues). The first value of the uncorrected frequency data corresponds to an optical fre-
quency of 181.652 THz (1650.37 nm). The last value of the uncorrected frequency
data corresponds to an optical frequency of 428.344 THz (699.89 nm). For exam-
ple, a laser line peak located at the 200th returned value has an optical frequency of:
or, 1551.07 nm (in vacuum).
If your program is aborted or interrupted after sending this query, the
Keysight 86120B continues to process the data but does not place it in the output
buffer. Because of the amount of data processed, the instrument will not respond to
any new commands in its input buffer for up to 20 seconds.
This query will generate a “Settings conflict” error if the instrument is in either the
coherence length or the signal-to-noise average application.
frequency 181.6879 THz 1 499 7.226756 GHz ( ) , + =
192.5208 THz =
frequency 181.652 THz 199 57.81405 GHz
( )
+ =
193.157 THz =