TB 9-6625-2309-24
line is beyond dashed boundary lines, this condition is usually
an indication of incorrect oscillator frequency on DAS 1A2A4
circuit card. If least squares line is beyond boundary lines but
this is not due to extreme slope (above or below), this is an
indication of ZERO-KM SETTING requiring adjustment.
Location readout error is worst-case summation of both the
OFTS data point sampling error and the calibrator cursor
placement error on leading edge of FOCUS generated pulse.
This is shown by spread of two data points in second cluster.
This amount of random error is to be expected in normal
operation at maximum range. (TD-260C will have a normal
spread of 2 meters, TD-261C - 4 meters and TD-285C - 8 meters).
Insertion Delay [nanosec]
: 209
Index of Refraction
: 1.4990
OFTS Horizontal
Scale
Wavelength [nm]
: 850
Pulse width
: Short
Model: TS-4320
Date: 12-9-94
Location Offset [m]
: -0.95
Main Frame SN: 9305-0003
Optical Module SN: 9307-0119
Scale Deviation [m/km]
: -0.0128
Model Name: TD-260C
MaximumReadouterror[m]
: 1.00
Figure 7. Examples of graphic report (screen). `Least squares line' between dashed boundary lines is
acceptable. (Only one `least squares line' will be displayed at a time.) Other `least squares
lines' are explained in NOTE below.
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