36
MDS TransNET 900 I&O Guide
MDS 05-2708A01, Rev. B
• The radio can be keyed using the
KEY
command.
DKEY
is used to unkey
the radio. (If the radio is left in a keyed state it is automatically unkeyed
after several minutes.)
• The
RSSI
is sampled in a raw, continuous fashion regardless of whether
the unit is a master or a remote.
Entering
Q
or
QUIT
returns the system to normal operation.
A timer keeps the Setup mode from accidentally leaving the system disabled.
After 10 minutes the system behaves as if
Q
or
QUIT
had been entered,
returning to normal operation.
SER
Displays the Serial Number of the radio.
SHOW PWR
The
SHOW PWR
command displays the actual (measured) RF power output
in dBm. Unlike the
PWR
command, this command shows the actual level
being measured, not the programmed RF power setting.
SHOW SYNC
When used at a Remote station, this command will display
Extended Address
and
Unit Address
of the Master or Extension radio to which the Remote is
synchronized. The network depth at the remote, defined as the number of
downstream links from the Master, is displayed in parentheses.
SKIP [NONE, 1...8]
This command sets or displays which, if any, of the eight 3.2 MHz-wide
zones will be skipped from the radio’s hopping sequence. Skipping zones is
one way of dealing with constant interference on one or more frequencies.
See
“A Word About Radio Interference” on page 9
for more information on
dealing with interference.
shows the frequency range covered by each zone. The command
parameter is either the keyword
NONE
or an undelimited string of up to four
digits where each digit 1...8 represents a corresponding zone to skip. (For
zone parameter input, the digits can appear in any order and can be optionally
separated by a blank space.) The
SKIP
command is display-only at remote
radios. (Remotes must be synchronized with the master radio to display the
skip status.)
In the USA, a maximum of four zones may be skipped, per FCC rules. Check
the regulatory requirements for your region.
Table 11. Frequency Zones
ZONE 1
ZONE 2
ZONE 3
ZONE 4
ZONE 5
ZONE 6
ZONE 7
ZONE 8
902.200
to
905.200
905.400
to
908.400
908.600
to
911.600
911.800
to
914.800
915.000
to
918.000
918.200
to
921.200
921.400
to
924.400
924.600
to
927.600
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