:CHANnel:FILTer
Command Syntax
:CHANnelN:FILTer {ON | OFF | 1 | 0}
Where N identifies a specific channel and must be selected from {1:8}{A|B|C|D}. For example, CHANnel3C.
Query Syntax
:CHANnelN:FILTer?
Query Response
{1 | 0}
Description
Turn on or off the use of reference filters on an optical channels for compliance testing. SONET/SDH, Gigabit Ethernet, and Fibre Channel standards have defined the compliance tests for consistency in standard measurements. These tests must be performed in a specific bandwidth. This bandwidth is achieved using the filters in the optical channels. The compliance tests then verify the performance of the input signal in that bandwidth. These filters concur with specific SONET/SDH, FC, or Gb En data rates. The filters available for the optical channels are dependent upon the type of plug-in module used to measure the input waveform. Use the :CHANnel{N}FSELect command to select a given filter.
Modules with a single filter allow you to only turn the available filter on or off. Modules that have filters that remain in the filter path at all times allow you to only select the filter you want to use from the Filter On. The selected filter will always remain enabled.
Simulated optical modules do not support reference filters. Sending this command has no affect on simulated optical modules.
The optical filter selection is only displayed for plug-in modules with internal optical channels.