B AF (audio frequency) indication
Appears whenever the input audio signal is
stronger than the reference level.
C GP (group)/CH (channel) indication
Shows the group and channel of the
reception channel.
For details, see "Settings" on page 11.
e + (+ selection) / – (– selection)
buttons
Press these buttons to set the group and
channel of the reception channel.
For details, see "Settings" on page 11.
f Antenna a/b connectors
Connect the two supplied antennas to these
connectors.
g SQUELCH switch
In ordinary use, set the switch to ON, and
the noise and signal interference will be
eliminated when the tuner unit is in signal
reception stand-by mode. Set to OFF to
search outside noise or a radio wave which
may disrupt the signal transmission.
Notes
• If you turn off the SQUELCH switch
when the tuner unit is in stand-by status
for signal reception or when the RF input
level is low, noise may be heard or the
connected device or speakers may be
damaged. Be sure to operate this switch
only after turning down the input volume
on the connected device.
• If you use the tuner unit at the
temperature of 0°C (32°F) or below,
dropouts in signal reception may occur. If
this happens, turn off the SQUELCH
switch.
h Mounting screws (4)
Used to secure the WRR-855S to the BTA-
801.
8
Parts Identification
For details, see "Using a Portable Tuner Mount
Adapter" on page 10.
i TX BATT (transmitter battery)
indicator
Shows the battery condition of the
transmitter (e.g., Sony WRT-series
transmitter or wireless microphone which is
provided with battery alarm function). The
indicator starts flashing about one hour
before the transmitter batteries are drained.
j AF (audio frequency) indicator
Lights up whenever the audio signal output
is stronger than the reference level.
k RF (radio frequency) input level
indicator
Indicates the strength of the RF input signal.
On in green: RF input is more than 25 dBµ.
On in red: RF input is between 10 dBµ and
25 dBµ.
Off: RF input is less than 10 dBµ.
l Accessory connector
For the signal and power connections with
the BTA-801.
Pin assignment
BTA-801 Portable Tuner
Mount Adapter (not
supplied)
m DC 12V IN (power input) connector
Connect to an external power supply (DC
10 to 17 V) of a Camcorder using the DC
power cable supplied with the BTA-801.