telephone hybrid is used to put telephone callers on
the air. A mix-minus
(from the console) is needed so the callers can hear
what's on the air.
If your console doesn't have a mix-minus output, MixMinus
Plus will add it so the hybrid works properly.
MixMinus Plus is a special
audio device that is designed to add a "mix-minus"
facility to an audio console or teleconferencing
system. It is often used in a broadcast station
to create the "send audio" which
is fed into the Send input of a telephone
hybrid. MixMinus Plus has inputs for "Program"
audio and "Caller" audio. The unit
removes the Caller audio from the Program
signal. This Program-minus-Caller audio is
fed back to the caller via the hybrid. Up
to 40 db of caller null is typical. The MixMinus
Plus needs no adjustment once installed, and
will work with virtually any console and hybrid.
The MMP is also applicable to satellite audio
systems, removing incoming audio from a return
IFB or cue feed to prevent echo and feedback.
to +8 dBm nom, bal, bridging
Caller Input...-50 to -10 dBm
nom, unbal, bridging
Caller Rejection...40 dB typical
Output Level....0 to +8 dBm,
Output Load....600 ohms or
Gain..........0 dB, Unity
to 20kHz, ±0.25 dB
Noise..>80 dB below nominal
50/60Hz, 3 W
and front panel
3.75"h x 2.25"d, 2 lbs
specifications subject to change without notice.