Reference Manual ATLAS 1000 AR144 Page
20
of
41
Italian Technology of Broadcast
ALARM MESSAGES
1.4
DIRECT POWER ALARM (SWR)
When the “PWR” surpasses 105% of the nominal power, the PWR LED starts flashing and the CPU will start reducing the MOSFET
polarization voltage to reach the nominal level of output power. If PWR does not comply with the nominal levels and surpasses 110%,
the CPU will set itself in standby and the display will say:
A
l
a
r
m
P
W
R
l
i
m
i
t
a
t
i
o
n
After a few seconds the CPU will run the start‐up sequence again. If at the end of the sequence the PWR returns to its normal
parameters, the transmission will continue, if the parameters are incorrect, the alarm cycle will activate.
Please Note: if the alarm cycle repeats 5 times in the distance of a few hours, the amplifier will block and
the display will say:
S
t
o
p
b
y
n
u
m
b
e
r
5
m
a
x
.
O
u
t
P
o
w
e
r
To restart the system, the Amplifier must be turned off and on again through the general power switch.
1.5
REFLECTED POWER ALARM (SWR)
Wh
en the “SWR” exceeds 105% of the
rated power, the SWR LED, on the rear of the card, starts flashing and the CPU will start to
reduce the MOSFET polarizing voltage to reduce the SWR. If this is not within the safety parameters, but exceeds 110% the CPU starts
the standby sequence and the display will show the following the text
A
l
l
a
r
m
l
i
m
i
t
a
t
i
o
n
S
W
R
After a few seconds, the CPU runs the sequence. If at the end of the sequence the SWR returns to normal parameters, the transmission
will continue, if not, it will return to the alarm cycle.
Summary of Contents for ATLAS 1000 AR144
Page 30: ...Reference Manual ATLAS 1000 AR144 Page 30 of 41 Italian Technology of Broadcast CPU BOARD ...
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Page 38: ...Reference Manual ATLAS 1000 AR144 Page 38 of 41 Italian Technology of Broadcast LED BOARD ...
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Page 40: ...Reference Manual ATLAS 1000 AR144 Page 40 of 41 Italian Technology of Broadcast ANALOG BOARD ...
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