Avsl Adastra LA Series Panduan Pengguna - Halaman 7

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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)

952.864UK, 952.867UK User Manual