952.864UK, 952.867UK User Manual
Operation
The front panel controls on the loop amplifier are recessed and can be adjusted using a flat blade
screwdriver. This is to avoid tampering or mal-adjustment after the correct settings have been applied.
Where new or unsupervised operators are making adjustments to equipment in the venue, they may not be
aware if they have adjusted the induction loop settings unless they themselves are a hearing aid user.
Set the Ch.1, Ch.2, Ch.3 and Loop Current controls (1, 2, 3, 6) to minimum and keep the Bass and Treble
controls (4, 5) in the mid position (12 o’clock)
Power up the loop amplifier and increase the Loop Current control (6) part way.
Whilst playing a signal into one of the input channels, gradually increase the level (1, 2 or 3) until the peak
current indicator (8) shows movement.
The optimum operating level is achieved if the channel level controls are set so that if all connected signals
are at maximum level, the Peak Current indicator does not show overloading.
It is recommended to use an induction loop receiver (952.855UK) to check the audio from the induction loop.
Adjust the Loop Current control to set the main audio level from the induction loop.
The Metal Loss Correction control (18) enhances higher audio frequencies which may be absorbed by metal
architectural features and appliances within the induction loop area. If the building has a lot of metal
structure or reinforced concrete in the vicinity of the loop, use this control to adjust the audio quality of the
loop signal.
Adjust Bass and Treble controls (4, 5) to set the tonal characteristics of the audio from the induction loop.
The mid-point (12 o’clock) is the zero position. Turning to the left of the mid-point will cut Bass or Treble and
to the right of the mid-point will boost Bass or Treble.
When the induction loop is not required, ensure that no hearing aid users are remaining within the loop area
and switch off the loop amplifier (leaving the settings in position will ensure that the induction loop is set up
correctly for the next usage)
