LD Systems PRE ST 1 Manual De Usuario página 10

GAIN: Control to set the pre-amplification of the corresponding audio signal. Set the Gain control such
that the Clip LED of the channel only lights up briefly when the signal level peaks. Avoid the Clip LED
being permanently lit by reducing the pre-amplification. It may also be necessary to reduce the signal
level on the playback device. The level of the emergency signal is not influenced by the current setting
of the main volume control (master volume), but is set via the GAIN control.
MIC/LINE 1
5
Microphone/line channel with switchable chime function (signal tone). The connection can be made via
the XLR/jack combo socket as well as the terminal block. In this case, the poles +, - and G are provided
on the terminal block connection for the balanced input signal.
Poles C and + are used for the connection of a separate mute switch (terminal block included in the
packaging). The contact closure offers the possibility to mute the MUSIC channel using an external
switch/button. In addition, the internal chime/signal tone function can be activated in this way when
the circuit is enabled (see point 6 MIC/LINE 2, CHIME).
MIC/LINE: If there is a line signal on the XLR/jack combo socket or the terminal block, switch the MIC/
LINE channel 1 to LINE mode using the corresponding MIC/LINE switch (switch pressed). If a microphone
is connected, activate MIC mode using the MIC/LINE switch (switch not pressed).
PHANTOM ON/OFF: When using a condenser microphone, you need to activate the 24 V phantom power
supply (PHANTOM ON/OFF switch pressed: ON). Always make sure that the microphone is connected
and the channel volume is set to minimum before turning on phantom power. Before you disconnect
the microphone from the device again, deactivate the phantom power and turn the channel volume to
minimum.
GAIN: Control to set the pre-amplification of the corresponding audio signal. Set the Gain control such
that the Clip LED of the channel only lights up briefly when the signal level peaks. Avoid the Clip LED
being permanently lit by reducing the pre-amplification. It may also be necessary to reduce the signal
level on the playback device.
CLIP: The red CLIP LED indicates the input is being operated at the distortion limit. You should reduce
the signal level on the GAIN control or the volume control on the playback device so that the CLIP LED is
no longer lit.
VOX: The VOX control makes it possible to set an audio threshold value for an automatic mute circuit
for MIC/LINE input 1, that mutes MIC/LINE 2 and MUSIC channels as soon as its input signal reaches the
predefined level. The PRIO LED is lit on the front if the contact closure or VOX circuit is activated. As soon
as the input level of the emergency signal falls below the set threshold, the channels are no longer
muted and the PRIO LED goes out. In such a configuration, MIC/LINE 1 has priority over MIC/LINE 2 and
MUSIC. Adjust the volume of the channel using control 1 on the front of the device.
MIC/LINE 2
6
Microphone/line channel with switchable chime function (signal tone). The connection can be made
via the RCA sockets (line level, a stereo signal is summed to mono) as well as the terminal block. In this
case, the poles +, - and G are provided on the terminal block connection for the balanced input signal.
MIC/LINE: If there is a line signal on the terminal block connection, switch the MIC/LINE channel 2 to
LINE mode using the corresponding MIC/LINE switch (switch pressed). If a microphone is connected to
the terminal block connection, activate MIC mode using the MIC/LINE switch (switch not pressed).
PHANTOM ON/OFF: When using a condenser microphone, you need to activate the 24 V phantom power
supply (PHANTOM ON/OFF switch pressed: ON). Always make sure that the microphone is connected
and the channel volume is set to minimum before turning on phantom power. Before you disconnect
10