User's Manual

MDS 05-3301A01, Rev. C MDS 9810 Installation and Operation Guide 43
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 are not accurate for incoming signals stronger
than –50 dBm.)
RTU [ON/OFF/0-80]
This command re-enables or disables the radio’s internal RTU simu-
lator, 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.
RX [xxxx]
This command sets or displays the test receive frequency used in place
of hopping whenever the radio is in Setup mode. The test receive fre-
quency can be reprogrammed to any value between 927.975 MHz and
902.025 MHz, inclusive. The factory default settings are listed below
and have been selected to be non-intrusive to normal operation.
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 is
NONE.
SEND [n, -n, +n]
The
SEND command selects or displays the number of times that a radio
will re-transmit data. This command is associated with “robust” or “bul-
letproof” operation of the radio and is intended for use in areas with
heavy radio interference.
Default Receive Frequencies
Master Remote
927.975 MHz 902.025 MHz