User's Manual
46 MDS 9810 Installation and Operation Guide MDS 05-3301A01, Rev. C
SKIP [NONE, 1...8]
This command sets or displays which, if any, of the eight 3.2 MHz (128
frequency) 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 Section 3.3 (Page 10) for more information on
dealing with interference.
Figure 24 shows the frequency range covered by each zone. The com-
mand parameter is either the keyword
NONE or an undelimited string of
up to seven 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
read-only at remote radios. (Remotes must be synchronized with the
master radio to read the skip status.)
Figure 24. Frequency Zones for MDS 9810 Transceiver
SKIPSYNC [ON/OFF]
Selectively suppresses transmission of SYNC messages in skipped
zones (see
SKIP command above). With SKIPSYNC set to ON, the trans-
ceiver will not transmit SYNC messages in skipped frequency zones.
This command is only available to transceivers that are set to be a master
(
MODE M). The default setting for this command is OFF.
NOTE: Using SYNCSKIP when many zones are skipped will signifi-
cantly lengthen the time it takes a remote to achieve synchro-
nization with the master. (This will also manifest itself as very
slow RSSI reading response).
SNR
This command displays the signal-to-noise ratio of the received signal
expressed in dB. As used in this guide, the definition of signal-to-noise
is based upon the signal level following equalization, for valid frames
only. (A valid frame is defined as containing no more than one bit error,
and belonging to a frame addressed for the receiving radio.) SNR is
updated and latched for each valid frame received. A filter in the DSP
tempers the effect of any sudden changes in the value.
ZONE 1
902.200
to
905.375
ZONE 2
905.400
to
908.575
ZONE 3
908.600
to
911.775
ZONE 4
911.800
to
914.975
ZONE 5
915.000
to
918.175
ZONE 6
918.200
to
921.375
ZONE 7
921.400
to
924.575
ZONE 8
924.600
to
927.775