AUDIOropa PRO LOOP DCCplus Manual de instrucciones - Página 7
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Imprimir página2.3 Configuring the amplifier and connecting audio sources
Up to 2 audio sources can be connected to the symmetrical XLR jacks (27).
PUSH
Microphone or Line IN (e.g.
CD-Player or audio amplifier)
When a microphone is connected, the used input must be configured with the corresponding switches („MIC/
LINE"). If phantom-powered microphones are used, 17 V of phantom voltage can also be added.
In the standard configuration, input IN1 is configured as "Line IN" and input IN2 as "microphone" with phan-
tom voltage. If you want to alter the standard setting please switch off the amplifier and set the switches on the
desired positions. After setting the switches please switch on the amplifier again.
2.4 Automatic Gain Control (AGC) / Limiter
2.4.1 General information
The automatic gain control (AGC) keeps the level of the audio signal on the connected induction loop constant.
The limiter makes sure that audio signals with a strenght of more than 0 dBV are not sent to the connected indu-
tion loop.
2.4.2 Switching the desired function on
Use the AGC/Limiter switch (24) to switch between AGC or Limiter function. If one function is set the other func-
tion is disabled.
AGC
AGC LIMITER
2.4.3 Setting the AGC range
You can set the AGC range with the AGC control regulator (25).
The correct AGC range depends on the audio input signals and the perceptions of the users of the connected
induction loop. If you set the AGC range too wide, soft sounds (e.g., undesired ambient noise) is amplified. If you
set the AGC range too narrow, desired soft sounds are lost.
2.5 Frequency range
You can set the frequency range with the 10K/5K switch (23).
To reach the most optimal results, set the switch on 5K position if the audio inputs contain speech.
If the audio inputs contain background music, set the switch on 10K position.
10k 5k
IN2
PUSH
PHANTOM
ON OFF
MIC LINE
IN1
PHANTOM
ON OFF
MIC LINE
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