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Related Functions
Remote Commands
User Wavelength Cal Date
Shows the date and time of the last successful user-performed wavelength calibration.
Key Path
Related Functions
Video BW
Specifies the bandwidth of the post-detection video filter. Filtering occurs after the detection of
the light. The minimum value for video bandwidth is 0 Hz. The maximum value is the lesser value
of either 3 kHz or the bandwidth of the currently selected transimpedance amplifier. In the auto
coupled mode, the video bandwidth has an extremely wide range. This allows the optical spec-
trum analyzer to avoid unnecessary filtering that would reduce the sweep speed more than
required.
Normally, the video bandwidth is coupled to the requested sensitivity. Manually entering a video
bandwidth sets Sensitivity to Auto. The video bandwidth can be manually set from 100 mHz to
3 kHz, or the bandwidth of the currently selected transimpedance amplifier, whichever is less.
The following functions affect video bandwidth:
• changing the sensitivity value
• changing the reference level
• turning auto ranging on or off
vice Menu > Multi-Point Align > User Source Multi-Pt Align
Auto Align & Add To Trajectory
Auto Align Preset
Calibrator Multi-Pt Align
CALibration:ALIGn:EXTernal
Wavelength > Wavelength Setup > User Wavelength Cal Date
Wavelength Calibration
See "Setting Video Bandwidth" on page 2-6
Function Reference
User Wavelength Cal Date
3-91
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