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16
Pre-amplifier
16.
Mic 1 to 5 phantom switch:
fl ip down the dipswitch from
channel 1 to 5 if you want to apply a 20 VDC phantom power
to input 1 to 5. Don’t use unbalanced sources in combination
with phantom power turned on on the same channel !
17. Mic/line 1 to 5 sensitivity knobs:
turn these knobs to adjust mic/
line 1 to 5 input sensitivity and gain: the signal/clip led present
on mic/line input 1 to 5 is your guide: turn down the knob to
the left fi rst, and gradually turn it to the right while you are
speaking loudly in the mic or while the line signal is applied.
When the signal/clip led turns red, you are overloading the
input. Turn the knob to the left a little until the led doesn’t light
up red anymore. Take your time to preset all mic/line inputs this
way.
18. Input 3 to 5 input blocks:
connect your balanced mic or line
signals on these euroblock connectors.
19. Input 1 and 2 input blocks:
connect your balanced mic or line
signals on these euroblock connectors. Additionally connect
the mic 1 and/or mic 2 switch(es) on these blocks to activate
the chime and priority. These contacts can be used for inputs
3-5 as well. Please note the priority system; the MIC1 contact
will mute MIC2-3-4-5 + Music, and the MIC2 contact will mute
Music (if dipswitch 4 is set).
20.
Ground connector:
connect your system’s ground or safety
ground on this connector if this is not already done by
mounting the unit in a properly grounded rack.
For additional functionality, there are also 2 open collector outputs at the rear controlled
by the priority switch, one output per zone. They can only be used by qualifi ed
technicians. Maximum sinkable current per output is 50 mA, maximum voltage is 24VDC.
No AC voltages are allowed on these outputs ! In case of inductive loads such as relays,
provide additional measures to avoid damage to the open collector outputs.
Содержание PM1122
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