To Set Markers To Measure Bandwidth; To Perform A Peak Search Using A Marker; To Change The Center Wavelength With A Marker - HP 86140A Series User Manual

Using the Optical Spectrum Analyzer
The Markers Menus

To set markers to measure bandwidth

1 Press the front-panel Markers key.
2 Select an active marker.
3 Place the marker on the peak of the signal to be measured by pressing the PEAK
SEARCH softkey.
4 Press the Marker BW.... softkey.
5 Select a pre-defined bandwidth or use the knob, step keys, or numeric entry
pad to enter the active marker bandwidth amplitude for the active marker.
If a peak search is not performed, then pressing the Marker BW.... softkey finds
the bandwidth around the currently active marker. If the bandwidth markers
cannot be placed at the selected value, an error message, such as " BW not
found " will be displayed.

To perform a peak search using a marker

1 Press the front-panel Markers key.
2 Select an active marker.
3 Press the PEAK SEARCH softkey.
The active marker is placed on the highest point of the active trace. If no
marker is
the active trace.

To change the center wavelength with a marker

1 Press the front-panel Markers key.
2 Place a marker on the trace to be centered.
3 Press the Marker to CENTER softkey.
The center wavelength is set to the wavelength value of the active marker.
3-24
, Marker #1 will be turned
ON
and placed on the highest point of
ON