26
Settings
Muting functions
The WRR-850A has the following three muting/squelching functions:
(1) Weak RF level muting
The weak RF level muting function mutes the audio output so that the
transmission can avoid affection by noise due to weak radio signal
when the field strength falls below the set level. Levels are selectable
among 15, 25 and 35 dBµ. 15 dBµ muting level is normally
recommended. The higher muting set level can suppress interference
caused by undesired RF carriers coming over from the surrounding
place. This will, however, result in a shorter range of reception.
When audio output is necessary more than good S/N, it is
recommended to use WRR-850A with the muting functions off. When
the RF level muting function is switched off, the noise squelching
function switches off automatically as well.
(2) Tone signal squelching
The tone signal squelch function mutes the audio output unless the RF
carrier contains the tone signal (32.768kHz) for discrimination of the
Sony wireless microphone system. The moment a transmitter is turned
on or off, it does not transmit the tone signal on the RF carrier, and
this function enables the WRR-850A to squelch noise caused when a
transmitter is switched on or off. It is possible to operate the WRR-
850A together with a transmitter which has no tone signal if the tone
signal squelch circuit is turned off. While the tone signal squelch
circuit is off, be aware that the noise generated by power switch-on/off
of a transmitter will not be squelched.
Once the tone signal squelch circuit is turned off, it remains off even
after the tuner is switched off.
(3) Noise squelching
When RF level from a transmitter is too weak to produce a quality
audio signal, the noise squelching function checks if noise exists in the
detected audio signals, and the function will shut off the audio output if
noise exists. In most cases, the noise squelch function should be left on.
Notes
• If any of the muting/squelching functions are switched off, the indicator
OFF
appears in the muting display. If
OFF
appears in the muting
display, you can confirm which muting/squelching function has been
turned off by pressing the buttons indicated in the “Buttons” column in
the “Error Messages” table on page 32.
• Under normal circumstances, all three muting/squelching functions
should be left on. If you find that one of the muting/squelching functions
has been turned off by accident, turn it back on again as described below,
and in the “Remedy” column of the “Error Messages” table on page 32.
Switching muting/squelching functions on and off
To switch the weak RF level muting function on:
Press the NO., MUTING and plus (+) buttons simultaneously.
To switch the weak RF level muting function off:
Press the NO., MUTING and minus (–) buttons at the same time.
To switch the tone signal squelch function on:
Press the NO., GP, and plus (+) buttons at the same time.
To switch the tone signal squelch function off:
Press the NO., GP and minus (–) buttons at the same time.
To switch the noise squelch function on:
Press the NO., CH, and plus (+) buttons at the same time.
To switch the noise squelch function off :
Press the NO., CH and minus (–) buttons at the same time.