Harris RF-7800B-DUO24, Operation Manuals

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5-3
RF-7800B
SCHEDULED MAINTENANCE
R
Table 5-4. Non-BIT Troubleshooting
Observation Action
BGAN terminal does not power on. Check batteries and/or power source.
Check cable connections.
Battery Box not supplying power.
Applies to the RF-7800B-DU024 only.
Check Fuse F1, F2 (Automotive Blade, 5 A 32 V).
Check Batteries.
Integrated Services Digital Network (ISDN) calls are not
accepted.
The Mobile Subscriber Number (MSN)
programmed into the ISDN device does not match
the MSN programmed into the terminal.
ISDN calls are not being made. The ISDN interface is turned off (the interface turns
off automatically when the terminal is operating
from battery power, or if no ISDN device is
detected within five minutes from power on).
BGAN terminal is connected to the BGAN network, but
cannot obtain the requested Quality of Service.
The BGAN terminal is not optimally pointed at the
satellite. Re-point the terminal.
Terminal does not obtain a Global Positioning System (GPS)
fix.
BGAN terminal location limits visibility of four or
more GPS satellites. Move the terminal to a
location where there are few obstructions.
BGAN terminal makes a continuous beep when an ISDN
device is connected to the ISDN port.
The ISDN device is trying to draw too much power
from the BGAN terminal's ISDN interface. Make
sure it is an ISDN device that draws less than 70
mA of current at 40 V (equivalent power 2.8 W). It
might be an Ethernet device.
The terminal will not register with the BGAN Network.
•
When viewing the terminal's Web interface, does the
terminal have a 3D GPS fix?
The BGAN terminal requires a GPS fix to
determine the correct Rx and Tx radio frequencies
to use.
Using the BGAN terminal's Web interface, wait for
the terminal to acquire a 3D fix. Attempt to move
the terminal to a location with a more open view of
the sky. Once the unit has acquired a GPS fix, it can
be moved into a more sheltered location nearby.
The terminal will not register with the BGAN Network.
•
Does the terminal have a clear line of sight to the
satellite?
Move the terminal to a more open location. In urban
environments, buildings produce regions of signal
reflection and fade that can result in strong signal
readings, but which introduce sufficient noise to
prevent communication. In such conditions, often
moving the terminal only a couple meters can fix
the problem.
The terminal will not register with the BGAN Network.
•
Are you in a geographical location where two BGAN
satellites have coverage?
The Land Mobile SATCOM-on-the-Move terminal
will automatically search for the best satellite
connection, but your position may be blocking the
view to the nearer satellite. You can force the
terminal to search for the other satellite by changing
the 'Satellite Selection' setting on the Web interface
Setup page from 'AUTO' to the desired satellite.