Crown Low Power Transmitters - Crown Broadcast
Crown Low Power Transmitters - Crown Broadcast
Crown Low Power Transmitters - Crown Broadcast
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2.2.3 Battery <strong>Power</strong><br />
Your transmitter can operate on a DC power source (such as 3 or 4, 12–volt automotive<br />
batteries connected in series). The FM30 requires 28 volts DC for full<br />
output power, while the FM100 requires 36 volts, and FM250 requires 62 volts for<br />
full output power. Connect the batteries to the red (+) and black (–) battery input<br />
binding posts on the rear panel.<br />
SCA IN COMPOSITE IN MONITOR<br />
RIGHT<br />
LEFT/MONO<br />
R<br />
L<br />
REMOTE I/O<br />
1<br />
2 3<br />
DC Input Terminals<br />
CIRCUIT<br />
BREAKER<br />
OFF<br />
+<br />
–<br />
B<br />
A<br />
T<br />
T<br />
E<br />
R<br />
Y<br />
36 VDC<br />
Illustration 2–5 DC Input Terminals<br />
CAUTION<br />
Possible equipment damage!<br />
Never connect a battery charger to the<br />
input terminals of the transmitter<br />
unless a battery is also connected.<br />
Voltage peaks from a typical charger<br />
(without the load of a battery) can be<br />
destructive to the transmitter.<br />
2.3 Frequency (Channel) Selection<br />
You may select an operating frequency of 87 to 108 MHz in the FM broadcast band.<br />
Pins 9 and 10 of HD2 on the RF Exciter board are jumpered for frequencies<br />
other than these such as the optional Japan frequencies of 76-90 MHz.<br />
To adjust the operating frequency, follow these steps:<br />
1. Remove the top cover by removing 18 screws.<br />
Installation<br />
2–5
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