Solidyne HL 202, Руководство пользователя

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2.4.3 Recording output
The recording output mix the incoming signal from telephone line
and the hybrid's local audio ('Send to phone line' input). This
enables the recording of conference including the Studios. The
output level is fixed (0 dBu / 10Kohms).
2.4.4 Connection to consoles that have no external hybrid
I/O (studio and live show consoles)
In consoles that have no connection to send and return for external
hybrid, the hybrid will connect to a line channel. The output of
HL202/203-VQ (Output to console) is balanced XLR. This output must
be connected to a balanced line input on the console to send calls to
air (PGM)

To connect this output to an unbalanced input, leave pin 3
unconnected (connect only 1=GND; 2=signal).
Send to phone-line is the audio input of the hybrid, which receives
audio from console and sends it to the phone line. This input is
connected to a secondary output of the console, unlike the program
output (Aux, Rec, FX, etc). Logically, the channel through which the
hybrid signal enters, do not be assigned to the mix that is sent to the
hybrid (Aux, Rec, FX, etc) because it will produce a feedback loop.
Never use the program out to send audio to the hybrid, because
will cause a feedback loop when the hybrid's channel is sent to
the air.
SOLIDYNE Telephonic Hybrids Page 15