Table 1-2 Rear Panel Connections; Figure 1-2 Mx920 Rear Panel With Power Supply And Duplexer Fitted - RELM BK RADIO SDMX920 Technical Manual

Technical Manual
1.1.1.2
The rear panel image shown has the internal Power supply fitted, alternatively the
MX920 can be ordered without the Power Supply or it can be retrofitted at a later date
should this be required. In the case of power being fed externally, the flying lead is
then routed out through the cable clamp grommet supplied with all units. No change
to the wiring in this case is required.
The MX920 also has the provision to mount two Sealed Lead Acid Six (6) Volt
Batteries (to be connected in series) in place of the Duplexer using the Battery mount
option. Alternatively another set of batteries can be also mounted in place of the
Power Supply Module. Hence a degree of power supply solutions can easily be
accommodated for special applications like a portable Repeater. Wiring for these
special cases must be performed by the appropriate qualified personal. Please contact
your Dealer or Distributor should you require the appropriate assistance.
Conn Type
Flying Lead
N TYPE
(CN6)
N TYPE
(CN8)

Figure 1-2 MX920 Rear Panel with Power Supply and Duplexer fitted.

© SPECTRA ENGINEERING 2003 Revision 1.1.4
Rear Panel
Function
DC Power input
Simplex relay out or
N type RX input
TX output

Table 1-2 Rear Panel Connections

(RF Connecting cables not shown)
Description
13.8 Volt DC power input.
Location for internal simplex relay. The
antenna for RX / TX connects to this point.
Alternatively an N-Type connector can be
used for the input to the receiver for full
duplex operation.
The RF power output from the transmitter for
full duplex operation.
Installation and Operation
5