Checking Ambient Signal Condition; Reducing Radio Interference By The Squelch Control - Toa WT-4810 Instrucciones De Operación

8.2. Checking Ambient Signal Condition

8.2.1. What is the "squelch"?
In FM receivers, such as a wireless tuner, big noise is produced at the output when incoming signals are weak
or when no signal is present. When the signal received is lower than a certain level of signal strength, by
silencing the output, the noise can be suppressed. It is a squelch circuit that achieves this. An RF check key is
provided to permit check of a disturbing wave when the unit is interfered with during its use. The key also
checks the presence of the disturbing wave in the channel of the new channel numbers when the unit is set
for such numbers.
8.2.2. Operations
Hold down this key for a while. As long as this key is pressed, the wireless tuner outputs the condition
received in the highest sensitivity, allowing an operator to hear radio interference.
Note
Take care about the volume level since noise or interfering sounds are heard while the key is pressed.

8.3. Reducing Radio Interference by the Squelch Control

8.3.1. Squelch control
The WT-4810 tuner has the squelch function that silences its output in the condition that a radio signal to be
received is under a certain level of signal strength.
This signal strength level can be varied by means of the squelch control graduated
from "0" to "10." The sensitivity is the highest and radio signals can be received in
wide areas when the control is in the "0" position, while the "10" position makes the
sensitivity the lowest, permitting the radio signals to be only received in narrow
areas.
It is possible to eliminate disturbing waves and only receive the radio signal transmitted from the required
microphone by changing the squelch setting to make the radio signal reception area narrow. The wireless
microphone's signal transmission distance varies largely depending on its ambient conditions, and the table
below provides guidelines on the squelch control vs. transmission distance.
Squelch Control Graduation
Transmission Distance (%)
Note: Transmission distance when in "0" position is 100%.
8.3.2. Squelch control setting position
• Set the control to the "0" position in locations free from interference.
• Set the control to the position that does not cause any reception loss of wireless microphone signals.
0 1 2 3
100 85 70 60
4 5 6 7
50 40 35 30
Squelch control
0 10
8 9 10
25 20 15
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