Williams Sound
®
Helping People Hear
7
S
ETTING THE
S
QUELCH
C
ONTROL
The squelch control sets the incoming signal level required to un-mute the R801. If the
receiver is not locked onto a signal, it can produce noise. The function of the squelch circuit
is prevent this noise when no signal is present., When the squelch is properly adjusted, turn-
ing off the Transmitter will cause the R801 to mute. The radio noise in each area is different,
so you must adjust the squelch when the R801 is installed.
1. Make sure the R801 is plugged in, turned on, and has an antenna attached.
2. Make sure the Transmitter is OFF.
3. Use headphones to listen to the R801 Phones Jack.
4. Set the R801 Frequency Selector to the desired channel.
5. While listening to the headphones with the Transmitter still OFF, turn the Squelch control
counter-clockwise until noise is heard in the headphones.
6. Slowly turn the Squelch control clockwise just until the noise disappears.
7. Turn the Transmitter ON. The signal in the headphones should be clear and free from
noise and interference, unless you are out of range of the Transmitter.
8. Turn the Transmitter OFF. The R801 should immediately go silent. Re-adjust the squelch
control if necessary.
C
HANGING
F
REQUENCIES
/I
F
Y
OU
E
XPERIENCE
I
NTERFERENCE
If you experience FM signal interference, you can easily adjust your transmitter and receiver
to a use different frequencies. The Transmitter and Receiver Frequencies must always
match.
C
HECKING FOR A CLEAR CHANNEL
:
The R801 can be used to “scan” for a clear channel in your area. With the Transmitter
turned OFF, Move the Frequency Selector switch on the front panel of the R801 and observe
the Carrier indicator light, while listening with headphones plugged into the PHONES jack.
If it comes on, that indicates another transmitter is operating on that channel in your area.
You should select another channel to use.
C
HANGING
T
HE
R801 R
ECEIVER
F
REQUENCY
:
1. Simply select an alternate channel with the Frequency Selector switch on the front panel.
The selector knob shows which frequency you have selected.
2. Make sure the Transmitter matches the Receiver channel. See your Transmitter
intructions.
