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Analyzer Operating Modes
This section discusses the following analyzer modes that you can use in specific measurement
applications.
• Filter Mode (For Agilent 86146B only)
• Time Resolved Chirp
Filter Mode
For Agilent 86146B only
The Agilent 86146B filter mode allows a single channel from a dense wavelength division multi-
plex (DWDM) signal to be isolated and routed to another measurement instrument. The filter
mode capability is built-in to internal applications to allow for fast and easy measurements. The
filtering is accurate and flexible. It has low polarization dependent loss (PDL), adjustable filter
bandwidth, and a wide tuning range.
• Switch to filter mode by pressing Appl > Measurement Modes > Filter Mode.
• Select a filter bandwidth in the BW/sweep > Res BW menu.
• Select an active tuning marker and tune it to a wavelength position.
The filter marker becomes the current marker and has the active area focus. All other markers
stay on. In the filter mode, the analyzer acts as a fixed-tuned, variable wavelength, variable
bandwidth, bandpass filter. It filters the input light at a specified wavelength. The filtered light is
available at the front-panel monochromator output connector. One application of the filter mode
is the filtering (selecting) of one particular mode of a laser source.
page
3-26,
"Filter Mode Instruction Panels" on page
page
3-25.
When the analyzer enters the filter mode, the sweep stops with the analyzer filter tuned to the
center wavelength. (If a marker is on, the analyzer filter is tuned to the marker wavelength.) The
last trace remains displayed to show the input spectrum before the filtering. A marker shows the
wavelength of the preselection. You can change the filtered output (preselection) wavelength by
Using the Instrument
Analyzer Operating Modes
Refer to "Filter Mode" on
3-26, and
"Filter Marker Tune" on
2-29
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