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INTRODUCTION
LDG pioneered the automatic, wide-range switched-L tuner in 1995. From its laboratories in St.
Leonard, Maryland, LDG continues to define the state of the art in this field with innovative automatic
tuners and related products for every amateur need.
Congratulations on selecting the LDG Electronics M-7700. The M-7700 provides accurate and
precise metering for a wide range of receive and transmit parameters. While many users will choose to
display S-meter readings on receive, and Power Output on transmit, several other useful readings are
available.
The M-7700 plugs into the external meter jack on the Icom IC-7700 transceiver. The parameter
displayed on the M-7700 can be either the same as the parameter displayed on the main IC-7700 virtual
meter, or can be independant of what is displayed on the main meter, giving the flexibility to watch two
parameters at the same time.
JUMPSTART, OR “REAL HAMS DON’T READ MANUALS!”
Ok, but at least read this one section before operating the M-7700:
1.
Configure the IC-7700 for normal operation.
2.
Plug the M-7700 into the radio’s meter jack using the included 1/8” stereo cable. The meter jack is on
the rear of the transceiver, between the DC Out jack and the External Keypad jack.
3.
Optionally, connect a 12 volt, 250mA DC power supply to the 2.5x5.5mm coaxial power jack (center
positive) on the rear of the M-7700. This only is needed for powering the backlight; the meter will
function without 12V.
4.
Using the radio’s setup menu, select which parameter to display on the M-7700 under the ACC menu,
“External Meter Output” menu.
5.
Operate the radio normally; the meter will continuously display the selected value. S-meter function is
normally shown on receive, and the selected parameter on transmit.
