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As the tone control is moved the blue light will travel around the control indicating the tone
position in use.
Loop level Indicator (3)
This indicates that a signal is being transmitted by the loop cable. It flickers with a low volume
and remains steady with louder volumes. Testing the system can be done by speaking into
a microphone and seeing the light flash, this will indicate that a signal is flowing round the
cable.
Sound source selections (4-7)
Pressing one of these buttons will select the sound source connected to the amplifier in
the corresponding sockets 13-19 on the rear of the amplifier. One or more of these can be
selected at any one time. When the channel is selected a blue light will show in the button.
Pressing again and the light will go out showing that channel is off.
Microphone
(4)
Selecting this will allow sound from microphones connected to sockets (18) and/or (19). If
a microphone is plugged into socket B (19) then if the priority button (17) is pushed in any
sound received by this microphone will override all the other sounds connected to the loop
system. This can be useful when used to monitor a doorbell or telephone bell or if a partner
wants to talk to the hearing aid wearer through the loop.
Analogue Line Input A
(5) and Analogue Line Input B
(6)
Allows the selection of the line input signals from channel A (16) or B (15). Useful to connect
to a TV and DVD player so that either may be simply selected from the front panel. Either or
both channels may be selected simultaneously.
Digital Audio
(7)
Allows the selection of digital audio from sockets (13) or (14) but not both at the same time.
When selected the button light will be blue. Should the light show red then there is no audio
being received by the digital equipment.
Headphone socket
(12)
The Headphone socket may be used with headphones that have a stereo 3.5mm plug fitted.
This may be used by a non-hearing aid user to receive amplified sound. It can also be used to
test that the loop system is set up correctly. Headphones used in this way will not affect the
performance of the loop system for hearing aid users. The headphone socket may be used
without a loop cable being connected but the loop level indicator will not show.
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