IMG STAGELINE LTR-104 Mode D'emploi page 8

GB 3 Applications
The LTR-104 has four separate audio channels which offer
the following facilities independent of each other:
1. DC isolation between a signal source (e. g. instrument,
microphone, computer, etc.) and the following unit (e. g.
amplifier, mixer, effect unit, etc.).
2. Reduction of interferences (e. g. humming) in long signal
lines by reducing the output impedance of the signal
source.
3. Reduction of interferences in long signal lines via balanced
signal transmission.
4. No hum loops when separating the ground between input
and output.
5. With wrong phase of the signal, the phase can be changed
by 180°.
6. Change from XLR to
7. Change from balanced to unbalanced connection and vice
versa.
4 Operation
The following operating instructions refer to one channel and
should be performed correspondingly for the other channels.
8
1 / " jack and vice versa.
4
1) Switch off all units before connecting them to the matchbox
LTR-104!
2) Connect the signal source (instrument, microphone, com-
puter, etc.) via one of the
(9) to the input IN. The input jacks (8+9) at the rear are
switched off if the input jack (1) at the front is connected,
and the XLR jack (9) will be switched off if the
at the rear is connected.
The connection between the signal source and the match-
box must be as short as possible in order to reduce inter-
ferences.
3) Connect the following unit (e. g. amplifier, mixer, effect unit,
etc.) to the output OUT via one of the
XLR jack (6). The output jacks (6+7) at the rear will be
switched off if the output jack (5) at the front is connected,
and the XLR jack (6) is switched off if the
rear is connected.
4) Switch on all units which are connected. With the volume at
the amplifier always reduced, operate the switches (2–4)
of the matchbox as follows.
5) Should humming occur, press the GND switch (4) and/or
RATIO (2) to eliminate resp. reduce the humming. The
RATIO switch (2) should always be depressed when using
long lines (more than 2 m). Thus, the line at the output (5,
6 or 7) will be less sensitive to interferences.
1
/ " jacks (1+8) or the XLR jack
4
1
/ " jack (8)
4
1
/ " jacks (5+7) or the
4
1
/ " jack (7) at the
4