User's Manual - Crown Broadcast

2.2.3 Battery PowerYour transmitter can operate on a DC power source (such as 4 or 5, 12–volt deep cycle batteriesconnected in series). The FM30 requires 28 volts DC for full output power, while theFM150 requires 48 volts, and FM300 requires 72 volts for full output power. Connect thebatteries to the red (+) and black (–) battery input binding posts on the rear panel.2–5 Illustration DC Input Terminals2.3 Frequency (Channel) SelectionYour transmitter is capable of operating between 87.9 and 107.9 MHz in the FM band. Thetransmitter can also operate between 76 and 90 MHz by shorting pins 9 and 10 of J20 onthe motherboard. (See illustration 2-6)To adjust the operating frequency, follow these steps:1. Locate the frequency selector switches on the front panel which will be used to changethe setting. See Illustrations 2–6 and 2–7.Installation2-5