Optical Backscatter Reflectometer 4600 147
User Guide
xUnits for the frequency domain can be set to 0 for
wavelength
(nm), 1 for frequency (GHz), or 2 for frequency
(THz).
Response: Returns the curve name or title on the first line, Y-axis label
on the second line, and the X-axis label on the third line.
The returned strings can be used to properly label a graph
plotted with values obtained from the FETC:MEAS? and
FETC:XAXI? queries.
Examples: FETC:GSTR? 0, 0, 1
Returns graph title, Y-axis label, and X-axis label in the
form:
Amplitude
Amplitude (dB/mm)
Length (m)
FETC:GSTR? 1, 3, 0
Returns: Group
Delay Group
Delay (ns)
Wavelength (nm)
FETCh:MEASurement?
Usage: FETC:MEAS? {trace, domain, graphType, decimate}
Trace is specified as a single letter: A, B, C, D or E.
Domain can be set to 0 for time domain, or 1 for frequency
domain.
GraphType can take values from 0 to 4 or 8, as shown in
the table above. The assignment of graphType depends on
which domain is specified. These values are listed in the
table above, beginning on page 145.
Decimate can be set to 1 to use decimation, or 0 to return
all points.
Description: Retrieves the Y-axis data for the specified parameters. The
portion of the data that is returned is determined from the
Integration (or Sensing) Area previously specified with
the CONF:INTW, CONF:INTS, and CONF:INTC
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