6
Connection and Set-up
It is advised that the loop system is initially set up using a local audio source
such as a CD player, which is not connected into any other system. This
avoids the complication of ground loops and feedback etc, whilst the unit is
set up.
The following procedure describes the installation of a stand alone
ILD1000G, and does not incorporate connection of other ancillary units such
as microphone pre-amps, mixing desks, or signal processing units.
1. Turn all controls fully anti-clockwise.
2. Connect the feed cable from the loop into the NL4 loop connector
supplied as shown:
1
2
1+
2+
LOOP
Note: Where using a perimeter loop (floor/ceiling level), the feed cable
should be tightly twisted to avoid unwanted stray magnetic fields.
3. Connect the signal inputs appropriately:
Microphones: Suitable dynamic or condenser microphone with balanced
cable feed. Select phantom power as required. Connect to INPUT 1 and
INPUT 2 (with selector switch in the appropriate position) using a 3-pole
XLR plug wired as per
Connections
drawing.
Line level signals: From other audio equipment such as PA system,
mixing desk or CD player. Connect to INPUT 2 (with selector switch in
the appropriate position) using a 3-pole XLR plug and INPUT 3 using a
3-pole balanced jack plug both wired as per
Connections
drawing
.
You may use either or all three inputs.
Do not run input and output cables close together
The SLAVE I/O must
NEVER
be used as a separate input. It must only
be used with Ampetronic signal processing equipment or for obtaining a
signal for recording. See
Connections
for details.
4. Connect AC power to the ILD1000G. See points 6 and 7 in
Safety
section.
5. Switch ON. The POWER LED will flash for a few seconds whilst an
internal self-test is performed and the loop resistance is tested. If both
tests are successful, the POWER LED will illuminate continuously and
the unit will be in an operational mode. If the POWER LED continues to
flash, or the LOOP ERROR LED illuminates, consult the
Troubleshooting
section.
6. Select one input and apply a suitable audio signal (ideally a CD player
