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Function Reference
Res BW
Res BW
Sets the resolution bandwidth value to be used. This determines the instrument's ability to display
two closely spaced signals as two distinct responses.
The resolution bandwidth can be set to one of the following values:
• For 86142B, 86143B, 86145B: 0.06 nm, 0.1 nm, 0.2 nm, 0.3 nm, 0.5 nm, 1 nm, 2 nm, 5 nm, 10
nm.
• For 86146B internal path: 0.06 nm, 0.07 nm, 0.1 nm, 0.14 nm, 0.2 nm, 0.33 nm, 0.5 nm, 1 nm,
2 nm, 5 nm, 10 nm.
• For 86146B external path: 0.04 nm, 0.05 nm, 0.07 nm, 0.1 nm, 0.2 nm, 0.3 nm, 0.5 nm, 1 nm, 2
nm, 5 nm, 10 nm.
In Auto mode, the resolution bandwidth is coupled to the span in a preset 0.01:1 ratio. This
means that the instrument attempts to set a bandwidth value that is 1% of the span setting. You
can alter this behavior by manually setting the resolution bandwidth.
For the greatest measurement range and signal to noise ratio performance, a resolution band-
width of 10 nm is recommended. Narrower bandwidths can be used if greater wavelength reso-
lution is required.
Key Path
Remote Commands
3-66
Bandwidth/Sweep > Res BW
SENSe:BANDwidth:RESolution:AUTO
SENSe:BANDwidth|BWIDth:RESolution
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