C. corr ecti v e action guide, continued – Teledyne C-2000 User Manual
Page 91
73
(Rev. 8/04)
®
Symptom
8. Cannot
mak
e
air
-to-ground
calls. Dropped calls.
Correcti
v
e Action
1. V
erify
“Air
-Ground
”
appears on
“Services
”
screen
(handset on-hook) when aircraft is at an alti-
tude of 18,000 feet or abo
v
e.
2.
If no error message appears on handset screen
while attempting to dial a party on the ground:
a)
Physically inspect the antenna.
The blade must
be
fi
rmly mounted with no cracks or dents
b)
Ensure the tightness of all RF coax cable
connectors.
The BNC and
TNC connectors
connected to the front of the
AR
TU and the
type N connectors on the Duple
x
er and
Antenna should be
“fi
nger tight.
”
(Do not use
pliers of an
y kind to tighten these connectors.)
Using a 5/16
”
open-end wrench,
ensure the
tightness of the tw
o SMA connectors on the
Duple
x
er
.
c)
Ensure the inte
grity of all the RF coax connec-
tor ends.
3.
Cycle po
wer to the system using a 30 second
interv
al between break
er of
f to break
er on.
Remarks
*
Air
-Ground appears on
“Services
”
screen only when the C-2000 system
has a signal from a terrestrial ground
station.
NO
TE:
It is assumed that the antenna
placement is a minimum of 3 ft.
away fr
om L-Band antennas.
*
Y
ou should not be able to pull out or
twist the coax cable when the connec-
tor is fully seated and tightened.
* Allo
w
fi
v
e minutes for Built-In
T
est to
complete.
C. Corr
ecti
v
e
Action Guide,
continued