Rack mounted,
19" wide and 1 3/4" high, telephone interface that compliments the remote broadcast telephones to get the most from
ordinary dial-up telephone lines. Has low and high frequency equalizer controls. Works
very well for on-air talk shows and for recording audio in production studios.
Technical
Specifications:
The ZH-2 Telephone Hybrid will accept mix-minus (send) audio input levels from -42 DBM to +20 DBM on
an active balanced/unbalanced input. Audio output is also active balanced and is
adjustable from zero to +20 DBM at clipping. Caller frequency response
is 300 Hz to 3 KHz +/- 1.0 DB. The front panel low and high frequency
equalizers offer +/- 8 DB at 300 HZ and 3 KHz to make the
caller sound more natural. Audio distortion is 0.2%
or less and noise is at -80DBM. Trans-hybrid null is 10 to
25 DB depending on the telephone line. A receive filter improves
recovered audio signal to noise. The filter response is -24 DB at 60 Hz,
-9 DB at 100 Hz, and -35 DB at 10 KHz as referenced to 1 KHz.
Notes:
This is an analog product. It connects to a telephone line either with
an internal high-quality line transformer, or with a capacitor in series
with that transformer. This capacitor is also internal. These two
configurations allow the hybrid to terminate and hold a telephone line or
bridge onto a line, which might be held by another device like a
telephone. Connections are made via a screw terminal strip at the rear
of the hybrid.
There is a
"conference" feature, which was put in the original design, to allow two
hybrids to conference/exchange audio between two telephone lines.
However, it does not work as expected so it is not recommended that hybrids
be connected in this manner. A
digital hybrid is
needed for this type of work.
$149.00 plus shipping and tax.
Full 12-month warranty.
