Installing the GPS Antenna
Figure1: L1 GPS Antenna - methods for cabling and mounting
GPS Signal Strength Requirements
Refer to Figure2: The required gain at the GPS receiver’s ANTENNA connector is greater
than 20 dB and less than 36 dB. A standard 150 foot length of RG-59 coax cable of has a
loss of 16-21 dB, which meets this requirement. Abide by the minimum input gain
requirements if using other cable types. Additionally, if changing the antenna, abide by the 41
dB gain requirement. Other factors, such as radiation, coverage, VSWR, and input
impedance also affect system performance. Symmetricom recommends using the standard
antenna and cable provided with the GPS receiver.
098-00116-000 Rev. A............................... Page 23 of 221
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