:CALibrate:OPTical:PREVious:PLOSs?

Flex Apps:
FlexOTO
FlexOTO Instance:
Hardware Diagram
Stations
Optical Cal Commands

Query Syntax

:CALibrate:OPTical:PREVious:PLOSs?

Description

When performing an optical path calibration, this query returns the power loss from the previously completed optical path calibration step. A single calibration step calibrates all possible optical paths available from a specific fixture's output lane. The returned string identifies each optical path and its power loss.

This command works differently than the similarly named :CALibrate:OPTical:PLOSs? query. The :CALibrate:OPTical:PLOSs? query returns the optical path power loss data that has been loaded into the Calibrations dialog from an optical calibration file (*.ocdx).

In the returned string:

  • Semicolons (';') delimit between the results for each optical path. For example,
    • <optical-path>;<optical-path>;<optical-path>;<optical-path>;...
  • Within an optical path, a colon (':') delimits between the path identification and its reported loss (dB). For example,
    • <path-ID>:<loss>;<path-ID>:<loss>;<path-ID>:<loss>;...
  • Within a <path-ID> commas (',') delimit between devices along a path with each device enclosed in brackets ('[' and ']').
    • [<device>],[<device>],[<device>],...
  • Within a <device> field, bars ('|') are the delimiter between in/out ports and device names. When a device does not have an input or output port, that field is simply missing.
    • [<in port>|<device name>|<out port>]

The following drawing shows the fields for a typical optical path. Note that delimiter characters are shown in the color red. Additional paths can be included for additional switch modules, impairments, and DWDMs.

Example Returned String

In the following listing, line breaks have been added between paths to make the string easier to read in this topic.

"[DUT Fixture 1|2],[1.2|Switch|9.4],[D|N1092D-US92000001]:3.010;
[DUT Fixture 1|2],[1.2|Switch|9.1],[Data In|N1078A-US78000001|Data Out],[A|N1092D-US92000001]:3.010;
[DUT Fixture 1|2],[1.2|Switch|9.2],[B|N1092D-US92000001]:3.010;
[DUT Fixture 1|2],[1.2|Switch|9.3],[C|N1092D-US92000001]:3.010"