35
MDS TransNET 900 I&O Guide
MDS 05-2708A01, Rev. B
For a master radio, under normal operation, entering the RSSI command
causes the response
NOT AVAILABLE
to be returned. This is because a master
is normally receiving signals from several remote stations and an RSSI
reading would be continually changing. The only exception is when the
SETUP
command has been asserted. This disables hopping and allows
reading a “raw” RSSI signal level in real time from a master or remote radio.
NOTE:
RSSI readings will not indicate signals stronger than –40 dBm.
RTU [ON, OFF, 0-80]
This command re-enables or disables the radio’s internal RTU simulator,
which runs with MDS’ proprietary polling programs (poll.exe and rsim.exe).
The internal RTU simulator is available whenever a radio has diagnostics
enabled. This command also sets the RTU address that the radio will respond
to.
The internal RTU can be used for testing system payload data or pseudo bit
error rate (BER) testing. It can be helpful in isolating a problem to either the
external RTU or the radio. The default RTU setting is
OFF
.
RX [xxxx]
This command sets or displays the test receive frequency used in place of
hopping when the radio is in
SETUP
mode. The test receive frequency can be
reprogrammed to any value between 902.200 MHz and 927.800 MHz,
inclusive. The factory default setting is 915.000 MHz.
RXTOT [NONE, 0–1440]
This command sets or displays the amount of time (in minutes) to wait for the
next received data packet before issuing a receiver time-out alarm. The
default setting is
NONE
.
SAF [ON, OFF]
This command enables/disables the operation of the Store-and-Forward
services. It can be set only at the network’s Master station, but will effect all
radios in the associated network. The default setting is OFF. See related
commands:
“XMAP [00000000-FFFFFFFF]” on Page 38
SETUP
This command sets up the transceiver for checking antenna SWR or trans-
mitter power with external measuring equipment. Do not use this mode
during normal operation.
When the
SETUP
command is entered, the prompt changes to
SETUP>
, and:
• Hopping is disabled.
• Synthesizer frequencies are reset to the test frequencies specified by the
TX
and
RX
commands described earlier.
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