TB9300 Installation and Operation Manual Working with Base Stations from Your PC 107
© Tait International Limited April 2024
will be used again. To avoid this, an alarm’s severity must be set to ‘Minor’
or ‘Notification’.
Minor An alarm of this severity means the base station has a fault that will need
addressing, but it remains capable of operating as part of the radio network.
Notification An alarm of this severity is not reported to the node.
5.4.11 Subaudible Signaling
The purpose of CTCSS and DCS signaling is to reject transmissions from
radios that do not belong on the network.
Use of 250.3Hz and 254.1Hz CTCSS tones
The receiver has a known issue where reverse tone burst signaling on
CTCSS tones of 250.3Hz and 254.1Hz can briefly trigger the other
detector. Do not use both tones in the same network. If using either tone,
be aware that there is a risk of falsing if co-channel transmissions are using
the other tone.
5.4.12 Checking for Interference on a Receive Channel
You can use the Signal Level page (Diagnose > RF Interface > Signal
Level) to look for sources of interference across a range of receive
frequencies.
The chart displayed on the Signal Level page has two lines. One shows the
current RSSI measurement for the selected frequency. The second shows a
historical trace of peak RSSI readings on that frequency.
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