Vector-LP
Ra
dio Beacon
Tr
ansmitter
Tec
hnical Inst
ruction Manual
Page 5-7
Section 5 Maintenance and Troub
leshooting
Issue 1.1
Table 5-1
:
Trou
ble
sho
oting and
Repl
a
c
eme
nt Tips
(Contin
ued
)
Front Pan
el
LED
Status
Messa
ge
Actio
n
See Troubleshooting/
Replac
emen
t Paragra
ph
See Re
-calib
ration
Paragrap
h
Output Net
wo
rk
SWR Shutb
a
ck
RF po
we
r ha
s bee
n inhibit
ed due to hig
h
reflecte
d po
wer. Che
ck th
e RF path bet
wee
n the tran
smitter’
s RF
output and th
e antenn
a sy
stem. If the instantan
eou
s reflected p
o
wer exce
ed
s 8
0
W, the RF
output is shut
back. The power level
will automatically recover to its
previous level
. If two consecutive SWR shutbacks
occur
within a
two se
con
d perio
d, the RF output is cu
t back
(see SWR
Cutba
ck).
N/A N/A
Output Net
wo
rk
Cutba
ck Leve
l
1-18
There are 18 steps (or cutb
ack levels) available. The transmitter will
continue de
creasi
ng or increasi
ng the
RF output po
wer u
n
til normal ope
rating
powe
r is a
c
hi
ev
ed, at which point the SWR al
arm
will
disap
pea
r.
If two consecutive SWR sh
utbacks occu
r within a two
se
con
d peri
o
d, the transmi
tter enters the next highe
st
cutba
ck level (1-18).
If the average
peak reflecte
d power exce
eds 3
0
W (V
R25
0
) o
r 15
W (VR125
), the tran
smitter enters th
e ne
xt
highe
st cutb
a
ck level (1-18
). Whe
n the reflected p
o
wer level falls b
e
low 3
0
W (V
R25
0) o
r 15
W (VR125
), the
transmitter wi
ll enter the ne
xt lowest cutb
ack level (1
-1
8).
Duri
ng a cutb
ack, the System Diag
ram’
s
Output Netw
o
rk
ala
rm l
a
mp blin
ks a
nd the Dia
gn
ostic
Display
indicates the
cutba
ck level (1-18).
N/A N/A
Cha
nge
over
Monitor
Cha
n
geover
Che
ck the accomp
anying
error me
ssag
e to determin
e the cau
se o
f the chang
eo
ver.
N/A N/A
Cha
nge
over
Monitor Shut
down
Che
ck the accomp
anying
error me
ssag
e to determin
e the cau
se o
f the shutdo
wn.
N/A N/A
External Alarm
Ext Interlock
Open
An external in
terlock
circuit is ope
n. Che
ck the integrity
of the circuitry conne
cted
betwe
en
term
inals TB1
-19
and TB1-20 of the remote interface PWB (A3).
N/A
N/A
External Alarm
Cha
rge
r Alarm
Che
ck for bat
tery cha
rge
r failure.
N/A
N/A
External Alarm
Low Battery
Voltage
The battery voltage is b
e
lo
w the low volt
age thre
sh
old
. Check batte
ry.
N/A N/A
External Alarm
ATU Not Respondi
ng
The asso
ciat
ed ATU is n
o
t resp
ondi
ng. Che
ck co
nne
ction bet
wee
n transmitter
and ATU.
N/A N/A
External Alarm
RCMI Not Responding
The NDB site interface P
W
B is not responding. R
eplace the NDB
site interface PWB.
N/A
4.3.5.1
4.3.5.3
