Tuning the Outdoor Antenna.
Follow the steps below to tune the Outdoor Antenna.
Step
Action
1
Make sure that the Transmitter is operating inside the location and is set to your chosen
frequency.
2
Open the cover of the ATU.
3
Select HI or LOW on the HI/LOW Frequency switch. If you are broadcasting on a frequency:
• OVER 1000 KHz (e.g. 1620) select HI
• UNDER 1000 KHz (e.g. 870) select LOW
4
Turn the Tuning Knob on the ATU until the needle on the Output Meter peaks at its highest
number.
NOTE:
Don’t worry if you cannot get to 10, anything 6 or higher is good (Typical is 7-9).
Do not touch antenna while tuning, it will cause the output to change.
5
Close the cover on the ATU box.
NOTE:
Anytime you select a different frequency on the transmitter you will need to open the ATU cover
and re-peak the meter so that the antenna is tuned to the new frequency.
6
For best performance,, you may want to attach a wire (not supplied,) from the the Ground Wire
Connector on the top of the ATU to an earth ground.
Some examples of earth grounds are:
• The center screw that holds the cover on a wall electrical outlet.
• Plumbing, water pipes (metal).
• A copper ground rod driven into the earth.
Please note that Part 15 FCC regulations do not allow an antenna in excess of 3 meters in
length and most usually the ground wire length must be considered by adding its length to
this total antenna measurement calculation.
Whip Antenna Connector
Mounting Bracket
Mounting Bracket
HI/LOW Frequency Switch
Tuning Knob Meter
Ground Wire Connector
Hinged Cover
COAX connector to Transmitter
