Helios FM 20/100 W, user manual– 12/2011
4. STARTING UP YOUR TRANSMITTER
4.1.
Connecting the transmitter
5
3
2
1
5
4
1. Make sure the safety loop is present on the rear panel.
2. Connect the transmitter RF output to a 50
Ω
load with a wattmeter.
The 50
Ω
charge power must be greater than 30 W for a 20 W transmitter and greater than 150 W for a
100 W transmitter.
When you acquired your Helios FM 20/100 W, the RF amplifier is deactivated and power is set to 0 W.
These settings can be adjusted using the PC application, the front panel application or serial
commands.
3. Connect the audio or MPX inputs.
4. Connect a PC to the serial port on the front panel of the Helios.
If your PC does not have a RS-232 port, use a USB/RS-232 cable.
Connect to power using the provided cable; you may unscrew the cable loop and pass the power cable
through it to secure it. Press the Local button on the front panel, then the RF button.
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