Commercial In Confidence
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3.7
SERIAL AND RS232 INTERFACE
The ART400 serial port is used to program and control the modem/transceiver. The comms
port is selectable to provide full RS232 or 5V TTL signal levels, either mode can be run true or
inverted, these modes are selected by links on the processor pcb, which are normally
specified by the client and configured prior to despatch. Should these parameters need to be
changed in the field, the following can be used as a guide.
JP11
Leave open or link 2-3 for inverted signal (normal)
Link 1-2 for non-inverted
