AUDAC PRE220, Руководство пользователя

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13
Enabling phantom power & talkover
Phantom power:
The phantom power switches on the rear side of the pre-amplifier enable phantom power
(48V) to the inputs for powering condenser microphones. The first switch ‘MIC 1’ enables
phantom power to the first input, the second switch ‘MIC 2’ enables phantom power to the
second input while switch ‘Mic 3-8’ enables phantom power to all other microphone inputs.
Make sure the connected devices are supporting phantom power before enabled, to avoid
damage to the connected equipment.
Talkover (Mic 1/2):
When talkover switches for ‘Mic 1’ and/or ‘Mic 2’ are enabled, it suppresses all other audio
sources in case of presence of a signal on these inputs. All other audio signals are suppressed
with -24 dB. This function is useful when used in combination with priority audio sources
which shall be heard clearly under all circumstances (e.g. priority microphones, voice
announcement systems, alarm systems, ... ).
Talkover (Mic 3-8):
When talkover for more than two inputs is required, this can be enabled for microphone
inputs 3 to 8 through jumpers located internally in the device (on the front PCB board). For
enabling this, the top cover of the device shall be removed and the jumper settings shall be
made as shown in the below diagram.
The talkover is enabled when the jumpers are placed in the left position, while the talkover
is disabled when the jumpers are in the right position.
Jumper settings for enabled talkover
Jumper settings for disabled talkover
Jumpers with positions ‘W1’ and ‘W2’ are affecting input 3, while higher numbers are related
with higher input numbers.
ATTENTION
Because these jumper settings require the housing from the electronic device to be opened,
these settings are allowed to be made by qualified technicians only.