The Power Supply - Lake People MIC-AMP C360 Bedienungsanleitung

GENERAL
The LAKE PEOPLE MIC-AMP C360 is an
excellent and extremely low-noise 2-channel
microphone preamplifier in a compact "Desk-
Top" case.
Due to its versatile concept and high level
capability it is also suitable for line signal
boosting and balancing.
Gain is controlled with a twelve-step rotary
switch which sets gain in 6-dB steps from 0 to
+66 dB.
Each channel is equipped with switches for
- Phase Reverse and
- Low Cut.
48V Phantom supply may be activated for both
channels simultaneously.
The state of all these switches is reported by
LEDs.
A four-segment LED bargraph displays the
output level over a range of 15 dB. Display
sensitivity can be adjusted internally to the
user's requirements.
The inputs and outputs are situated on the
back panel, they are equipped with gold plated
XLR connectors.
As an option, the MIC-AMP C360 can be
equipped with transformer balanced outputs.
THE CASE
The grounded case is made of 1 - 3 mm thick
stainless steel. This provides high mechanical
stability and resistance against rough handling.
The cases surfaces are not treated with any
material, so providing excellent electrical con-
ductances for optimum EMC characteristics.

THE POWER SUPPLY

The unit should only be operated with the
provided wallplug adaptor.
Other power sources may be used under the
following circumstances:
The power source shall deliver a proper AC or
DC voltage within the range of 8 ... 25 Volt.
The power source shall be able to deliver 1.5
times the current which is marked on the back
of the unit.
Voltages exceeding 25 V may cause serious
damages which are not covered by the
warranty.
The unit is protected against reversed polarity.
The external power source is connected with a
3.5 mm phone-jack
assignment:
+ U
- U (Ground)
SWITCHING ON
The power switch is located on the rear panel
and has three positions. The unit is powered
with the switch situated in the "EXTernal"
position and the green "POWER" LED on the
front panel is illuminated.
THE EARTH/GROUND CONCEPT
This unit is powered by an external source and
thus is not including a power cord with
ground/earth facilities.
The internal reference point (Ground) is
connected to the case !!
XLR GROUD-LIFT Jumper
(accesible from the inside, see also page 15)
G(ROUND):
Ex works all jumpers are set to G(ROUND)
position. Pin 1 is connected to the internal
ground reference. High frequency interferen-
ces are deflected to the case via a 100 nF
capacitor.
L(IFT):
The interconnection between Pin 1 and ground
is open. High frequency interferences are
deflected to the case via a 100 nF capacitor.
This jumper position is useful when the unit is
equipped with transformers !!
10
with the following