Squelch And Signalling Thresholds Tab - Tait TM8200 Installation And Operation Manual

Squelch and Signalling Thresholds tab

Squelch Detect
Type: Noise Level
Opening Pt for
Squelch Detect
Type: Signal
Strength
Hysteresis for
Squelch Detect
Type: Signal
Strength
Opening Pt and
Hysteresis for
Signalling Modems
37 Deviation and squelch thresholds
Sets the squelch mute opening points of country, city, and hard when the
squelch detect type is set to noise level. Each value can be changed from 8
to 20 dB SINAD for specific system requirements.
The default values for each are:
Country: 8 dB SINAD.
City: 12 dB SINAD.
Hard: 20 dB SINAD
The hysteresis when the squelch detect type is set to noise level is
Note
fixed at a preset level, approximately 2dB RF.
Sets the squelch mute opening points of country, city, and hard when the
squelch detect type is set to signal strength. Each value can be changed from
-30 to -119 dBm for specific system requirements.
The default values for each are:
Country: -115dBm
City: -113dBm
Hard: -107dBm
Sets the hysteresis of country, city, and hard when the squelch detect type is
set to signal strength. The hysteresis determines how much lower than the
opening point the mute closing point will be.
The default values for each are:
Country: 9dB
City: 8dB
Hard: 4dB
Each value can be changed from 2 to 20dB for specific system requirements.
However, as a guideline use a higher hysteresis value for lower opening
points, and a lower hystersis value for higher opening points.
Determines the threshold and hysteresis for the radio's various signalling
modems. The In-band Signalling Modem includes Selcall, Two-tone, and
Single In-band tone signalling. The hysteresis determines how much lower
than the opening point the mute closing point will be.
The default value for each opening point is -119dBm, and can be changed
from -30 to -119dBm for specific system requirements.
The default value for hysteresis is 10dB, and can be changed from 2 to 20dB
for specific system requirements.
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August 2004 © Tait Electronics Ltd