Model 428 User’s Manual REMOTE COMMUNICATIONS
Bristol Instruments, Inc. 55
:AVERage:COUNt {2 | 4 .. | 128}
Determines the number of scans used to calculate wavelength and
power when the average function is enabled. The choices are 2, 4, 8,
16, 32, 64, or 128.
When average is on, the interferograms from the selected number of
scans are collected and averaged before any measurements are
computed and displayed.
Resets and restarts the spectral averaging, if spectral averaging is
turned ON.
Queries the automatic calculation of the OSNR location and bandwidth
state.
Turns the automatic calculation of OSNR location and bandwidth ON or
OFF. If ON, the OSNR is calculated as the ratio of the power in the
optical channel relative to the interpolated noise at the channel location.
The noise at the channel location is interpolated by calculating the
average of the noise measured 100 GHz to the left and to the right of the
channel location. If another channel is less than 200 GHz away, then the
noise is calculated midway between the two channels. The bandwidth
for the noise is fixed at 0.1 nm if AUTO is ON.
If AUTO is OFF, then the user selected noise location (:SNR:WAV) is
used to measure the noise and the bandwidth is the user selected
bandwidth (:SNR:BAND).
Queries the user selected location for noise calculation when
:SNR:AUTO is OFF.
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