User's Manual

R01.i RT System 2 v2.3 Deployment Guide 133
© 2010-2014 Wireless Seismic, Inc. All rights reserved.
5. Point-to-Multipoint Backhaul
Connecting to the Recording Truck
The following table lists information about the pendant radio connection.
Table 5–5 Pendant Radio Link Elements
Item Description
Configuration The following additional configuration files are provided:
• • Recorder-AP.cfg
• • Recorder-S.cfg
RR • The radio at the recording truck is a Rocket radio with an Omni
antenna and is indicated in the drawings as RR (Recorder/
Rocket).
• Use the Recorder-AP.cfg file with this radio.
• The RR radio should be installed at the top of the pole, pointing
directly at the pendant radio (PN).
PN • The radio at the line is a NanoStation radio with a built-in
antenna and is indicated in the drawings as PN (Pendant/Nano).
• Use the Recorder-S.cfg file with this radio.
• The PN radio should be installed at the top of the pole, pointing
directly at the recording truck radio antenna (RR).
• The PN radio should be at least 3 ft (0.91 m) from the line pole
(Pole 1 in the example shown in “Connecting the Recording
Truck with a Pendant Radio Link” on page 131). Use as much
distance as you can as allowed by your cable lengths.
• The PN radio and pole should be between the line and the
recording truck as shown in “Connecting the Recording Truck
with a Pendant Radio Link” on page 131.
Batteries • Adding a third radio to the LIU increases the battery usage at
this position. To ensure that the LIU does not reset due to a low
or depleted battery, keep two batteries connected to the LIU at
all times.
• The battery with the lowest voltage is used until the voltage falls
below the Unit Thresholds ? LIU Voltage Warning number
(usually about 11V). At this point, the LIU auto-swaps to the
battery with the higher voltage. Monitor the battery status in
the Ground Equipment Table. Replace the low-voltage battery
with a fully-charged battery as soon as possible after the battery
auto-swap occurs.