Installation Guide
Typical mast mount of in-line amplifier
GPS Down/Up converter: The GPS Down/Up converter makes cable runs of 250 to 1500 feet
(75 m to 457 m) possible. GPS signal down conversion requires a special GPS antenna and
corresponding signal up-converter. The antenna module converts the signal down to a lower
frequency that has less attenuation, and transmits it the length of the cable to the up-con-
verter. The up-converter restores the signal to the normal GPS signal frequency for use by
the receiver.
GPS down/up con-
verter
The down/up conversion process is transparent to the GPS receiver. As with any precision
GPS timing receiver, only cable delay and down conversion delays need to be entered into
the receiver. Power is supplied by the GPS receiver or an external power supply. It is import-
ant to note that the cable used in GPS down/up conversion is different from the standard
cable.
Fiber Optic Links: Fiber-optic connections function as a transparent link between the antenna
and GPS receiver equipment. These links eliminate the limitations of copper systems by
enabling longer transmission distances while retaining the highest level of signal quality. In
997-01520-02 Rev. F1.......................................................................... Page 147
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