MX940 Base Station & Repeater
Technical Manual
© SPECTRA ENGINEERING
2022 Revision 1.0.0
18
5. Appendices
5.1 MX940 Interface Connections
The user connections to the MX940 are all made via the Front and rear panel where
the following connectors are located.
Conn Type
Function
Description
Mini-Fit Jr ,4P
DC Power input
13.8 Volt DC power input.
N TYPE
N type RX input
The input to the receiver for full duplex
operation.
N TYPE
TX output
The RF power output from the transmitter for
full duplex operation.
RJ45
Ethernet
Gives the base station an identity as a network
element, and provides the physical
connections for the Ethernet
USB
USB TYPE B
Serial Data interface.
Table 5-1 MX940 Interface Connectors
5.2 Rear interface Board
The rear interface provides the necessary user interface points for the radio. The input
supply ( +13V8 DC), a USB type B, and the physical connections for the Ethernet and
system interface.
5.2.1 Rear User Interface
All user interfaces to the MX940 except the TX RF connections and LEDs are made
by way of the Rear interface board .
CN3 - USB type B Connection for the serial port programming.
CN4 - DC Supply input , +13V8 DC.
CN6 - Ethernet connection.
Front panel LED's - See Section 1.1.1.