Language Reference

MKDREFF

Example

100

OUTPUT

723;"MKDREFA

-23.5DB;"

Set the marker's vertical position.

 

110

OUTPUT

723;"MKDREFF

1300NM;"

Set the marker's horizontal position.

Description The MKDREFF command, in conjuction with the MKDREFA command, positions the general reference marker anywhere on the display. This is in

contrast to normal active markers which must reside upon a trace point. The MKDREFA command must be issued before the MKDREFF command. If the active marker is not displayed, MKDREFF places it at the speci￿ed wavelength. If the position of the marker is not speci￿ed, MKDREFF places it at center screen.

For wavelength spans greater than zero, the MKDREFF command returns the wavelength of the active marker, or the wavelength di￿erence between the reference and delta marker when the relative-marker mode has been activated by the MKD command. For wavelength spans equal to zero, MKDREFF returns the marker position in terms of time. As a prede￿ned variable, MKDREFF represents either the wavelength or time position of the active marker and can be very useful during math operations and data analysis. The marker readout and returned information varies depending on span and marker-readout setting selected by the MKREAD command.

Query Response

See Also MKDREFA, MKWL, MKA

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