MBD-8G is an intelligent controller compatible
with all eight-antenna switches manufactured by Hamplus.
It has a band decoder to receive the information coming
from the connected radio equipment. In addition to antenna
switching, the MBD-8G also offers seven frequency-driven
GPOs (General Purpouse Output), one Band Data BCD Output,
one output to command Band Pass Filter, 12 GPOs to automate
the operation with TopBeam s Waller Flag receiving
antenna. The MBD-8G also commands the RS-24 and RS-44
There are four ways that antennas and enabled rotators
can be selected:
1) Manually by the front panel of the MBD-8G,
2) Manually by frequency or band change on the front panel
of the transceiver,
3) Automatically by frequency or band change by the remotely
4) Automatically by a remotely controlled personal computer
via RS-232 serial port to the MBD-8G.
On the front panel is a set of eight illuminated push
buttons for manual selection of antennas, eight Busy
LEDs to indicate which antennas are in use by other MBD-8G
Controllers, four LEDs to indicate rotator selection,
one LED to indicate when the radio is transmitting, one
LED to indicate the controller is in Split Antenna mode
and one LED to indicate when the MBD-8G is connected to
+13.8 Vdc power.
The MBD-8G receives from the transceiver the power supply
(13.8VDC), the Send line and the information about the
band in use. The controller recognizes the following Radios:
1- CI-V (Icom)
2- BCD (Yaesu and Elecraft)
3- RS-232 (Kenwood, Icom and Elecraft)
With the MBD-8G it is possible to operate with one antenna
for the transmission and another one for reception. The
commutation of the antennas is automatically made when
the MBD-8G receved the Send information from
The split is automaticly engaged when you select an antenna
set up for recieving only, not allowing it from transmission.
The memorization is automatic, just press a push button
of the desired antenna. Any one of the eight antennas
can be used in any or all the bands. Whenever the radio
will power ON or change the band, the last antenna chosen
for that band will be set automatically.
Frequency Driven GPO:
The MBD-8G provides seven tuning points for automatically
controlling shortened antennas with high Q coils. The
tuning points are easily found by the operator using the
radio and push buttons
Band Data Output:
The MBD-8G receives the radio information by CI-V (Icom),
or by RS-232, or by BCD and provides a BCD output for
use in external equipment.
Command output for the RS-24 and RS-44 Rotator Switch:
The MBD-8G has the command output to the rotator switch
RS-24 or RS-44. On the front pannel there are four LED´s
to indicate the rotor in use at the moment. The programming
to associate the rotator to each antenna is one easy job
made by the user in a couple of minutes. This configuration
is saved in a not volatile memory.