Module A-119 (External Input / Envelope Follower) is designed to allow external audio signals to be integrated into the System A-100. It comprises a pre-amp, envelope follower, and comparator.
The pre-amp has two inputs: an unbalanced input for line level signals, with a gain factor of from 0 to 20, and a balanced input with a gain factor of from 0 to 500, for insertion of low level signals, for instance from a microphone or electric guitar. The Envelope Follower reads the signal level of the input, and puts out a proportional voltage as an envelope at its own output. The comparator generates a gate signal whenever the input goes above an adjustable trigger threshold. Three LEDs help you keep track of overload, the envelope, and the gate signal.
Power consumption: 30mA at +12V and 20mA at -12V
Depth: 45mm
HP : 8
The module was designed primarily to derive an envelope and gate signal from the incoming audio signal. The built-in preamp is not "high-end" and shows - depending upon the position of the gain control - a reduction of higher frequencies in the frequency response. It is possible to improve the frequency response by replacing IC1 (the upper of the two integrated circuits) by a more sophisticated circuit. For example the LME49740 can be used. It's no longer in production but available e.g. via Ebay.
Apart from this an incoming audio signal with sufficient level can be patched directly to the audio input of A-100 modules (e.g. filters), i.e. without the detour via the A-119. In this case the A-119 functions only as envelope and gate generator and the audio output of the A-119 remains unused.
If you decide an equipment item is not suitable within 10 days of delivery, you can return it to us for a replacement or refund. Returns must be unused and in their original, undamaged packaging.
Some items are excluded from our money back guarantee, including:
• Computer software that has been unsealed or registered
• Any item that comes directly into contact with the nose, ears or mouth
To arrange a return, just contact our customer service department on 020 7424 2800 or email us at support@juno.co.uk
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