Viper SC+™ IP Router for Licensed Spectrum PN 001-5008-000 Rev. C
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4.
Feedline to PolyPhaser® (lightning surge protection device)
Remote Vipers
i.
All cable connectors should be installed using manufacturer’s guidelines.
ii.
Ensure all RF connections at the Viper and at the surge protector are hand-tightened. It is
not
recommended
to use pliers or wrenches to tighten RF connectors. TNC male matches to TNC female; N
male matches to N female, etc.
Do not cross-match TNC to N!
iii.
Ensure there are no tight bends in the cable. Do not kink the cable.
5.
Antenna feedline cable to antenna (from PolyPhaser)
a.
At the tower site, CalAmp recommends that the cable and antenna be analyzed to determine return loss. A low
return loss (lower than 15 dB) should be inspected and corrected.
b.
At the remote site, CalAmp recommends that the cable and antenna be analyzed to determine return loss. A
low return loss (lower than 15 dB) should be inspected and corrected.
6.
Site grounding
All sites should have a system ground. The base station or tower ground might be more intricate than at the
remote sites. The base station might have a grounding bed outside that the inside grounding network connects to.
In all cases, the following devices should have their own grounding cable connecting to the system ground.
i.
Viper (via the back panel or cabinet ground).
ii.
PolyPhaser or an isolated grounding bus.
iii.
Antenna feedline cable shield.
iv.
Power supply.
7.
Antenna mounting and alignment
a.
Tower site antennas
i.
Ensure the correct model was installed and record.
ii.
Ensure the antenna is mounted in the vertical, straight up and down.
iii.
Ensure there is the recommended standoff from the tower leg if applicable.
iv.
Ensure there is no other antenna mounted directly across from the antenna.
b.
Remote site antennas
i.
Ensure antenna is mounted at least 12 inches from any obstacle.
ii.
If yagi, ensure yagi is aligned back to the tower location. Check with GPS.
iii.
Ensure yagi is mounted for vertical polarization and is level or slightly angled to the tower if extremely close.
8.
Weatherproofing connections
a.
All connections exposed to the weather should be weatherproofed after the site has been tested and verified
to pass valid data. Weatherproofing kits are available for outside RF connections. This includes all shield
grounds as well.
b.
Follow the manufacturer’s recommended installation methods when applying weatherproofing.
