World Time Solutions GPS6000-PRO User Manual - page 11
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GPS6000-PRO - GPS Time Receiver - User Manual - Version 1.1
Section 3: Installing the GPS6000-PRO
For example, to set a total cable length of 14m (or 00001110 in binary),
set the 8m, 4m and 2m switches on (as shown in figure 3.5 below).
Figure 3.5 - Example 14m cable delay offset
Alternatively, to set a total cable length of 59m (or 00111011 in binary),
set the 32m, 16m, 8m, 2m and 1m switches on (as shown in figure
3.6 below).
Figure 3.6 - Example 59m cable delay offset
A NOTE REGARDING THE CABLE DELAY OFFSET ACCURACY:
The GPS6000-PRO advances the time data by 5 nsec for every additional metre
added to the cable delay offset value. This 5 nsec per metre value has been
chosen as a good approximation to the velocity of propagation for RG-58C/U (at
66%, or 5.05 nsec/m). However, users wishing to achieve the highest level of
accuracy should take account of the nominal velocity of propagation for Belden
9502 (at 60% or 5.56 nsec/m) and correspondingly increase the programmed cable
delay offset at longer output cable lengths.
ANTENNA
STATUS
GPS6000 - GNSS TIME DECODER
CABLE DELAY OFFSET
8m, 4m and 2m switches set on (up)
ANTENNA
STATUS
GPS6000 - GNSS TIME DECODER
CABLE DELAY OFFSET
32m, 16m, 8m, 2m and 1m switches set on (up)