User's Manual

MReX Transceiver User Manual v1.92 Firmware
Connecting to the MReX
The minimum required connections for a usable system:
1. Connection to an antenna.
2. Power supply of 5-9Vdc connected to pin 12 or 3V battery connected to pin 18.
3. Connection to a GND pin.
SMA connector is female type. The module must be connect to a 50 ohm antenna designed for use
at the intended frequency of operation.
The MReX module can be mounted on header pins or soldered hard against another PCB.
There are multiple GND connection pins available. A minimum of one must be used for the supply
GND. The others may be connected to GND or not connected and used as module mounting sup-
port.
Inputs are protected with input diodes and internal weak pull up resistors. To operate inputs tie to
GND.
SMA connector locking nuts must be used to prevent forces applied to the antenna from placing
stress on soldered connections.
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