1.4.13
GPS Antenna Module
To synchronize the 933A with the GPS, order the GPS Antenna Module
(Part No. AS0077600). It includes a 50-feet cable assembly that attaches
between the front panel of the 933A and the GPS module. The antenna
module provides the best accuracy for 933A timing measurements.
Operating at the standard GPS frequency (L1 band) of 1575.42 MHz,
the antenna module receives power from the 933A through the cable
assembly. The same cable assembly communicates time and position data
via RS-485 to the 933A.
If connected before power up, the Model 933A automatically recognizes
the GPS module and sets the internal clock on the Model 933A to the
correct time. If the GPS module is connected after power up, use the
manual programming function to synchronize the 933A (see page 38). The
photo below shows the standard cable assembly and the magnet-mounting
bracket.
Figure 1.7: GPS Antenna Module and Cable Assembly
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