Luna 4600 - Measurement Theory; Fiber Optic Interferometry

Optical Backscatter Reflectometer 4600 159
User Guide
FETC:FSIZ? {trace,
domain, graphType,
decimate}
Retrieves the size of the data array for the specified variables:
Trace can be A, B, C, D or E.
Domain = 0 for the time domain, 1 for frequency domain.
GraphType values for the time domain (0):
0 = Amplitude
1 = Linear Amplitude
2 = Polarization States
3 = Phase Derivative
4 = Amplitude (dB)
5 = Spectral Shift (only on some instruments)
6 = Temporal Shift (only on some instruments)
7 = Strain (only on some instruments)
8 = Temporal Shift (only on some instruments)
GraphType values for the frequency domain (1):
0 = Return Loss
1 = Linear Amplitude
2 = Polarization States
3 = Group Delay
Decimate: 1 = use decimation, 0 = return all points.
145
FETC:GNAM? Retrieves the available graph names for all numeric values of
graphType for both time and frequency domain, as listed
above under FETC:FSIZ?
146
Table 7-1: Alphabetical Summary of GPIB and TCP/IP Commands
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