Chapter 2 Features and Functions
Inputs
2-4 Getting Started Guide
Inputs
Antenna Input
The N-type (female) ANTENNA connector allows you to connect to the
58532A L1 Reference Antenna. The antenna assembly is an “active”
antenna; a “passive” antenna will not work with the Receiver.
Integral to the antenna assembly is a low noise amplifier (LNA) that is
provided for Receiver operation with antenna cable lengths up to
115.2 meters for LMR 400 cables or 53.3 meters
1
for RG-213 cables.
The single coax cable is used to provide signals from the antenna to the
Receiver and to supply a dc voltage to the LNA. For longer antenna
feed runs, an additional amplifier (58529A Antenna Line Amplifier) is
required to compensate for lengths greater than 115.2 meters or
53.3 meters.
Recommended Antenna Cable Assemblies
There are two types of cable assemblies recommended for connecting
your antenna system: LMR 400 or RG-213 (Belden 8267 ).
The following paragraphs describes when and how many line
amplifiers are required with the LMR 400 and RG-213 cables.
LMR 400 Cable Line Amplifier Requirements
If cable length between GPS Module and antenna is:
• Less than 115 meters, no line amplifier is necessary.
• More than 115 meters and less than 240 meters, you need 1 line
amplifier.
• More than 240 meters and less than 360 meters, you need 2 line
amplifiers.
• More than 360 meters, contact sales for assistance.
RG-213 Cable Line Amplifier Requirements
If cable length between GPS Receiver and antenna is:
1
Fifty-three point three meters includes the sum total of all of the cables used to connect the antenna
to the Receiver (such as the cable between the antenna and line amplifier, the cable between the line
amplifier and lightning arrester, and the cable between the lightning arrester and the Receiver.
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