RADIOBEACON TRANSMITTER
ND500II (125 WATTS) DOUBLE SIDEBAND - NO VOICE
Page 5-14
15 September 2003
(g)
Set '
remote on/off
' switch to on.
(h)
REMOTE CONTROL
lamp DS1 shall turn on.
(i)
After a nominal five second delay,
TEST
meter
M1/s forward power indication will be the same
indication as step (c).
5.3.11.2
Standby On/Off
: Verify the transmitter is
turned off when +15V is applied to A11TB1-20 from
a remote location and will turn on when it is removed,
as follows:
(a)
Set switches as tabulated for
Calibration
Setting
in table 4-1.
(b)
Set
TEST
switch S6 to
FWD PWR
.
(c)
Verify
TEST
meter M1 is indicating the
'intended' carrier level as determined in
paragraph 5.3.5.
(d)
Set
MOD
switch S4 to
ON
.
(e)
Set
TEST
switch S6 to
MOD % READ
.
(f)
Verify
TEST
meter M1 is indicating the
'intended' modulation depth as determined in
paragraph 5.3.6.
(g)
Set
KEYING
switch S5 to
ON
.
(h)
Set
MONITOR
switch S5 to
NORMAL
.
(i)
MONITOR BYPASS
lamp DS2 shall turn off.
(j)
Apply +15.0V between A11TB1-20 (+) and
ground.
(k)
The transmitter will immediately 'shut down'.
(l)
TEST
meter M1's forward power indication
shall go to zero.
(m)
AC POWER
lamp DS10 shall remain on.
(n)
Remove the +15.0V input on A11TB1-20.
(o)
After a nominal five second delay,
TEST
meter
M1's forward power indication shall return to
normal.
5.3.11.3
Remote Power Trim
: The remote power
trim was checked in paragraph 5.3.5.
5.3.11.4
Standby 1 and Standby 2 Codes
: The
standby 1 and standby 2 codes were checked in
paragraph 5.3.7.
5.3.12
REMOTE MONITORING CHECKS
:
Verify a remote ground control signal is generated
when the transmitter shuts down, exceeds the SWR
threshold and switches from an AC power source to a
DC power source (battery), as follows:
5.3.12.1
Remote Shutdown Alarm
: The remote
shutdown alarm was checked in paragraph 5.3.8.
5.3.12.2
Remote SWR Alarm
: The remote SWR
alarm was checked in paragraph 5.3.9.
5.3.12.3
Remote Battery Status
: The remote
battery status is checked in paragraph 5.3.13.
5.3.13
EXTERNAL DC SOURCE
OPERATION CHECK
: Verify the transmitter will
automatically switch over and function normally
from a DC power source (battery), when the AC
power source fails, as follows:
(a)
Ensure battery leads are connected to terminals
A11TB2-1 (+) and A11TB2-2 (
−
) on the
remote interface PWB (A11) on the rear of the
transmitter.
(b)
Set switches as tabulated for
Operating Setting
in table 4-1.
(c)
Verify transmitter is operating normally and all
alarm lamps are turned off.
(d)
Switch off AC power supply at the service
entrance.
(e)
AC POWER
lamp DS10 shall turn off.
(f)
BATTERY-ALARM
lamp DS9 shall turn on.
