Installation FlexPak6 & FlexPak6D Enclosures Chapter 3
OEM6 Family Installation and Operation User Manual Rev 12 45
3.3.1 Choosing a Coaxial Cable
An appropriate coaxial cable matches the impedances of the antenna and receiver (50 ohms) and has a line
loss not exceeding 10.0 dB
. If the limit is exceeded, excessive signal degradation may occur and the receiver
may not meet performance specifications. NovAtel offers several coaxial cables to meet GNSS antenna
interconnection requirements, including:
• 5, 15 and 30 m antenna cable with TNC connectors on both ends (NovAtel part numbers GPS-C006,
GPS-C016 and GPS-C032)
3.3.2 Mounting the GNSS Antenna
The GNSS receiver is designed to operate with any of the NovAtel single, dual and triple-frequency GNSS
antenna models. See Section 3.3, Selecting a GNSS Antenna on page 44
for more information.
When installing the antenna:
• Choose an antenna location with a clear view of the sky so each satellite above the horizon can be
tracked without obstruction. For more information on RF signal propagation and multipath, refer to
the NovAtel application note APN-008 Discussions on RF Signal Propagation and Multipath
at
www.novatel.com/support/
.
• Mount the antenna on a secure, stable structure capable of safe operation in the specific
environment.
To select a coaxial cable for the application, consult the NovAtel application note APN-003 RF
Equipment Selection and Installation available at www.novatel.com/support/. Also refer to this
application note if the application requires the use of cable longer than 30 m.
NovAtel recommends using high quality coaxial cables because an impedance mismatch,
possible with lower quality cables, produces reflections in the cable that increases signal loss.
Although other high quality antenna cables can be used, the performance specifications of the
OEM6 family receivers are warranted only when used with NovAtel supplied accessories.
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