:CHANnel:FSELect:BANDwidth

Flex Apps:

FlexDCA

FlexRT

Command Syntax

:CHANnel{1:8}{A|B|C|D}:FSELect:BANDwidth <bandwidth_in_Hertz>

Where the required specifier {1:8}{A|B|C|D} identifies a channel by its module slot number and channel letter. For example, channel 3C (CHANnel3C).

The channel specifier will fail if it does not include a slot number. If instead the suffix's channel letter is missing, the command defaults to letter A. As a result, the best practice is to always explicitly specify the channel by including both the module slot number and channel letter.

<bandwidth_in_Hertz> is a double.

Query Syntax

:CHANnel{1:8}{A|B|C|D}:FSELect:BANDwidth?

Description

For optical channels, selects or queries the reference filter by 3 dB bandwidth. The channel will use the reference filter that is closest to the requested bandwidth. If the bandwidth is not within 1% of a supported reference filter bandwidth, an error will be generated. Use the :CHANnel:FILTer command to enable or disable the filter.

To select or query the maximum supported reference filter 3 dB bandwidth, use the :CHANnel:FSELect:BANDwidth:MAXimum command.
To select or query the minimum supported reference filter 3 dB bandwidth, use the :CHANnel:FSELect:BANDwidth:MINimum command.
To query the list of available 3 dB bandwidths, use the :CHANnel:FSELect:BANDwidth:VSET? query.
Although not the preferred method, you can select a reference filter by list order in the Reference Filter field of the channel Setup dialog, use the :CHANnel:FSELect command.

The query form of the command returns the current reference filter's 3 dB bandwidth. For example, 9.953 Gb/s would be returned as: 7.46496E09.

Requires FlexDCA revision A.05.41 and above.

Example Command

:CHANnel2A:FSELect:BANDwidth 26.5625E+9