Operation Manual

EF1210 U
SER
M
ANUAL
4 http://www.aspi.com Copyright © 1999, All Rights Reserved
conversation. At a convergence rate of 30 dB per second, ASPI echo cancellers are
the fastest on the market.
Because the EF1210 supports a wider range of acoustic gain than most echo cancel-
lers, it offers greater flexibility in loudspeaker and microphone placement. Most echo
cancellers can only operate properly at less than 0 dB of acoustic gain. Breaking
through this threshold can cause echoes and howling as loudspeaker levels overpower
the microphones. That can leave you with few options when designing audio or video
conference rooms. A wider range of acoustic gain results in a smaller danger zone,
allowing the Systems Designer greater flexibility when placing loudspeakers and
microphones or setting volume levels.
ASPI’s superior audio quality allows all parties to communicate freely and naturally,
without echoes, switching noises, clipping of words, or dropout of speech. A pat-
ented state-logic algorithm ensures smooth and natural communications without typi-
cal speakerphone performance problems.
ASPI’s proprietary noise cancellation on each of the inputs helps to keep overall noise
to a minimum. ASPI echo cancellers are the only ones on the market to feature this
patent pending technology. Noise cancellation filters out ambient background noise
such as HVAC, LCD projectors, and road noise. Our noise cancellation technology is
not a noise gate. It actually removes noise. Therefore, it enhances the operation and
improves the sound quality of an automixer, for example, by preventing it from bring-
ing the noise level up and down when microphones are gated on and off. By cancel-
ling the noise picked up by each microphone, the overall SNR is preserved. The
result is crystal clear speech over a greater decibel range than any other echo cancel-
ler. That means reduced listener fatigue and a higher quality audio conference.
The EF1210 is also fully RS-232 controllable via all popular room control systems,
and provides links to other ASPI products, such as the EF200 Phone Add.
Warranty
Registration
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information will help us to provide you with better customer support.
P
RODUCT
F
EATURES
• 8 microphone/line level inputs
• Phantom power on each input
• Ambient noise cancellation (patent pending) on each input
• Fast convergence rate of 30 dB/sec
• Works in environments with up to 10 dB of room gain
• Links to other ASPI devices such as EF200 Phone Add
• Compatible with most matrix and automixers
• Fully RS-232 controllable via room controllers
• Front panel lock-out capability
• Can be used as a wideband noise canceller (20 kHz bandwidth) when AEC is dis-
abled
• Long “Tail Time” supports even the most difficult of rooms (200 ms)
• Supports up to two AEC reference input signals
• Supports record and playback
• Ability to store user configurations in non-volatile memory
• Digitally controlled analog trimpots
• Phoenix connectors for audio input and output
• Single rack unit width and height