MFJ-5124K/Y Radio Interface
Instruction Manual
4
©
2005 MFJ Enterprises, Inc.
Yaesu Radio Interface
The MFJ-5124Y1 radio interface allows users of certain Yaesu transceivers that
have an 8-pin mini DIN CAT port, such as the FT-100, FT-857 and FT-897, to
connect to the MFJ-991, MFJ-993 and MFJ-994
IntelliTuner™
Automatic
Antenna Tuners. The MFJ-5124Y2 radio interface connects to Yaesu
transceivers that have a DB-9 CAT port, such as the FT-847. With this
interface, DC power (except FT-847) is supplied by the radio and control signals
are connected between the tuner and the radio. The operator can then control
the tuner and the radio with the [TUNE] button on the front panel of the tuner.
Connections for FT-100, FT-857 and FT-897
1. Insert the 3.5 mm stereo phone plug into the tuner’s RADIO
INTERFACE jack.
2. Insert the 2.1 x 5.5 mm coaxial power plug into the tuner’s POWER
jack.
3. Insert the 8-pin modular plug into the MFJ-5124’s TO RADIO jack.
4. Important:
Make sure the DC power to the radio has been turned off.
The radio does not fuse the DC power to the tuner, and damage to the
radio can occur if the interface’s power connection comes in contact
with ground.
5. Connect the 8-pin mini DIN connector to the mating 8-pin mini DIN
connector, marked as CAT, on the back of the radio. The FT-100 has
the DIN connector at the end of a pigtail.
6. Push the [POWER] button on the tuner to the
in
position. When the
radio is powered on, the tuner will also power on.
7. The CAT/Tuner/Linear menu in the radio menu system should be set to
CAT. The CAT baud rate should be 4800 baud. ATAS (if available)
should be set to OFF. Some radios may need to be powered off and
then on for the changes to take place. Refer to your radio’s operating
manual for accessing the menu system.
Connections for FT-847
1. Insert the 3.5 mm stereo phone plug into the tuner’s RADIO
INTERFACE jack.
2. Insert the 2.1 x 5.5 mm coaxial power plug into the tuner’s POWER
jack.
3. Insert the 8-pin modular plug into the MFJ-5124’s TO RADIO jack.