Marti RPT-30, User Manual

Page: 10 / 43

Mobile Remote Control
Remote control of the RPT-30 transmitter requires a
switch to control p12 volt DC power and a sec-
ond switch to control the transmit function. The primary
+12 volt control requirement can be met by tapping the
“Accessory” circuit of the vehicle which is controlled by
the ignition switch. The “transmit” function can be per-
formed by installing a switch on the vehicle or by the
push-to-talk switch on a microphone such as the Marti
MCD-70B.
FIG. 2. shows the electrical circuit of a mobile instal-
lation.
CAUTION: TOTAL CONTROL CIRCUIT RESISTANCE MUST
NOT EXCEED 0.3 OHMS!
Control circuits having more than 0.3 ohms resistance
should employ a relay with low resistance contacts lo-
cated near the transmitter.
Mobile Repeat
Mobile repeat operation is covered under
STATION-
ARY REMOTE BROADCAST INSTALLATION
. Electrical
connection is through Mobile Repeat Cable No. 585-037-
2. This cable is connected between the RPT-30
transmitter and AR-10 receiver. Power is obtained by
connecting the fused RED wire to the vehicle
“Accessory” +12 volt circuit controlled by the vehicle
ignition switch. The electrical diagram of this cable is
shown in FIG. 3.
Mobile Antenna Installation
One or more mobile antennas are required depending
upon the various receive and transmit frequencies and
whether antenna duplexing is used. Antennas are speci-
fied in the various system packages listed in the Marti
literature. The installer should follow the instructions
supplied with the mobile antennas.