Combined Average Power Out Versus PA Cabinet Combi-
nations
B/PAL and B/SECAM Systems
Cabinets ON
Average Combined Power Output
ABC
15 0 0 2.84
0 15 0 2.84
0 0 15 2.84
15 15 0 11.4
15 0 15 11.4
0 15 15 11.4
15 15 15 25.6
5.14 Aural RF Power Calibration
The same general approaches used in calibrating the peak detec-
tors for visual power monitoring are also used to calibrate the
peak detectors for the aural transmitter.
5.14.1
1-20 kW Transmitters
Using external metering, adjust the power output from the trans-
mitter to the rated aural power. Display the aural PA page on the
front panel screen. Connect a high impedance voltmeter to TP-2
on the main controller board and adjust R-83 to 0.8 volts for the
HT1, HT2, or HT5, or 2.5 volts for HT10, HT15, or HT20. The
frontpanel display should readratedauraloutput power.Connect
the forward cable at J-7 to J-9 and adjust reflected calibrate
control R-91 for the same voltage as above at TP-4. Restore
cables to normal configuration.
5.14.2
30 kW Transmitters
For 30 kW transmitters with 10% aural power, adjust the power
output from the transmitter to 3 kW. Display the aural PA page
on the front panel screen. Connect a high impedance voltmeter
to TP-2 on the main controller board and adjust R-83 to 2.5 volts.
The front panel display should read 3 kW. Connect the forward
cable at J-7 to J-9 and adjust reflected calibrate control R-91 for
2.5 Volts at TP-4. Restore cables to normal configuration.
If the 20% aural power option is installed in the transmitter,
energize only one of the RF chains and set the combined output
power to 1.5 kW. Next, adjust R-60 on the slave controller for
2.5 volts at TP-3. The aural RF chain display should read 1.5 kW.
De-energize that aural RF chain and energize the other chain.
Repeat the procedure, this time adjusting R-74 and monitoring
TP-4.
This table lists the jumper settings for normal operation with a * before the jumper settings
MAIN CONTROLLER
* J18-1 > 2 Enable visual foldback action.
J18-2 > 3 Disable visual foldback action.
* J19-1 > 2 Enable aural foldback action.
J19-2 > 3 Disable aural foldback action
* J20-1 > 2 Use internal +12 volts to power remote command inputs.
J20-2 > 3 Use external power for the remote command inputs.
* J21-1 > 2 Use internal +12 volts to remote status outputs.
J21-2 > 3 Use external power for the remote status outputs.
* J22-1 > 2 Normal operating position Battery in.
J22-2 > 3 Battery disconnected normal storage position.
* J23-1 > 2 Normal operation for AC OFF TIMER.
J23-2>3 Usedinfactorytest.
J24-2 > 3 Turn transmiter off if interlock is opened.
SLAVE CONTROLLER
J16-1 > 2 Used when cabinet has only one 50 volt supply.
J16-2 > 3 Used if cabinet has two 50 volt supplies.
MONITOR
* J50-1>2 Connects 5V charge current to battery.
* J50-3>4 Connects WDOG to U27.
J50-5>6 Connects (+) Bat to A/D.
J50-7>8 Connects (+) side of battery to ground.
* J50-9>10 Connects (-) side of battery to ground.
Table 5-5. Setup Jumper Functions
5-8 888-2365-001 Rev. B: 1/11/1999
WARNING: Disconnect primary power prior to servicing.
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