thus can operate with weaker signals and have longer communication
range.
Figure 1 (Packet Mode of Operation)
For operation of the modem in the streaming data, non-packetized mode, see
the section
Streaming Mode
on page 21
.
The Packet or Streaming
operation is configured using the
ATMT
command, with Packet Mode being
the factory default.
4.1.
Setup
1. Connect a DC power source to the DC IN connection on the front of the
modem.
2. Connect a good quality antenna, cut to the operating frequency, to the
BNC connector on the front of the modem. Use a good antenna, and
place is at high-above obstructions as possible.
3. Connect a computer terminal, or PC computer running HyperTerminal, to
the 9-pin I/O connector. The factory default serial ports settings are 9600
bps, 8 data bits, 1 stop, no parity.
4. Program the modem’s operating frequency to your desired operating
frequency. This is done with the
ATFX xxx.xxxxx
command. See the
section “
Serial Port Commands
” for information describing the various
parameters that may be modified in the modem. In most applications, the
default settings from the factory will work fine.
5.
Using the AT commands, change any of the default operating parameters
that must be modified. From the factory, the modems are configured and
shipped ready-to-use. Out of the box, they will communicate on the
