MFJ-4724 Desktop/Remote Antenna/Transceiver Switch
Instruction Manual
4
OPERATION
1. Connect a 2.1mm plug DC power supply to the 12VDC jack on the back of
the unit. The supply must be capable of supplying 300mA continuous at
12-15 volts DC. This unit is polarity sensitive. It requires the following
power connection:
The sleeve is negative, and can be grounded or floated at the power
supply. The center pin is positive, and MUST be ground isolated.
2. Rotate the Selector Knobs to choose the desired antenna and transceiver.
The switch positions are numbered and lettered on the front of the control
panel and a space is provided to pencil in the designation for each
antenna. Once the antenna or transmitter is selected, you may transmit
into the selected antenna.
3. If you are using the MFJ-4724RC Remote Control, turn the Selector Knob
on the MFJ-4724 to the OFF/Remote position.
a. Connect the 2.1mm plug DC power supply and the RJ-45 modular
jack to the Remote Control.
b. Rotate the Selector Knobs to choose the desired antenna and
transceiver. The switch positions are numbered and lettered on the
front of the control panel and a space is provided to pencil in the
designation for each antenna.
IMPORTANT:
NEVER switch antennas with RF power applied to the
Master feedline. Damage to the switching contacts may
result from “hot-switching”.
