AirCell ST 3100, Руководство по установке

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AirCell
®
ST 3100 Troubleshooting Procedures
Symptom
Possible Cause Discussion Verification Step(s)
Symptom 3
Handset Display is
illuminated and
display indicates
no service Possible Cause 3A
System antenna does not
have Line of Sight (LOS)
view to satellite. The ST 3100 Transceiver
operates over the Iridium
Satellite Network. When in
coverage the ST system should
detect and register.
If the system does not register,
then it is likely that either the
antenna does not have a LOS to
a satellite (3A), or there is a
problem with the RF channel in
the aircraft (3B). In this
condition, it is unlikely that there
is a problem with the system
Transceiver.
Verification Test 3A
‰
Verify that the system SAT antenna has a clear LOS to the sky in all
directions. A clear LOS is defined to exist when there are no obstructions
(such as buildings, trees, vehicles etc) that are higher than 30 degrees
above aircraft horizon in any direction. This should never be a problem in
flight.
‰
Once the LOS has been established the system should register on the SAT
network within 60 seconds. The system is registered when the “NO SVC”
indicator is not visible on the handset display.
‰
If the “NO SVC” indicator extinguishes, then the SAT mode is engaged, and
the problem is resolved. The user may choose to make a test call and verify
the operation the system.
‰
If the “NO SVC” indicator stays illuminated, then the system cannot register,
and it is likely that there is an installation or equipment problem. Either
contact AirCell Technical Support for additional guidance, or proceed to
Verification Test 3B.
No Satellite mode
signal Possible Cause 3B
There is a problem with the
Satellite RF channel.
Iridium Satellite signal can be
monitored using a Personal
Computer (PC) interface to the
RS-232 data port that is
associated with the Iridium
Channel in question.
Connect a PC using a 9-pin
serial cable to the RS-232 data
port of an Iridium channel.
Using a PC Hyper Terminal
connection, (comm 1 or x) (Bits
set to 19200), at the prompt
Enter ate1v1 Enter, then at+csq?
Enter.
This will show a snapshot of
satellite Signal. “+CSQ: X”
X=bars of signal.
1 to 5, 5 = 5 bars of signal.
Verification Test 3B
‰
While the aircraft is on the ground, perform a visual inspection of the ASE
system satellite antenna. Verify that the antenna is installed to the aircraft
fuselage in accordance with the system antenna installation drawings.
Verify the mechanical integrity of the antenna, and that the antenna is
reasonably free of dirt, oil, ice and other undesired coatings.
‰
Visually inspect the RF satellite channel, including the coaxial connections to
the antenna and the system Transceiver. Inspect the coaxial connectors to
verify that they are connected in accordance with the system wiring diagram,
and that they are not damaged. Look for breaks, kinks or other damage to
the coaxial cable.
‰
The user is authorized to correct installation errors (such as cabling errors),
or to repair minor damage (such as broken coaxial connections, damaged
coaxial cables, etc). The user is not authorized to open or modify sealed
Line Replaceable units (LRUs).
‰
If these steps do not resolve the problem, contact AirCell Technical Support
for additional guidance.
Other conditions
For all other conditions, contact AirCell Technical Support for guidance.
AirCell
®
ST 3100 Troubleshooting Procedures
Page A-2
Appendix A
800-10680-C, May 2007