Table of Contents
Advertisement
Input Options
Input 1
Input 1 has four options, each selected by a set of slide switches located directly below the
input socket. The option is turned on with the switch set in the upper position. The options
are
•
VOX – allowing a Voice Operated Switch facility to be used. When this
facility is turned on, any signal (such as speaking into a microphone) above
the threshold level will cause all other inputs to be muted. When the signal is
stopped, the other input levels will gradually be restored.
•
Phantom Power – providing 18Vdc phantom power on the XLR socket. This
is often used to power external low current devices such as Electret
Condenser Microphones.
•
Chime – allowing the chime facility to be activated. If set, a two-note chime
will be heard through the loudspeakers when the priority terminals are closed.
•
Siren / Chime– allowing the siren or chime facility to be activated when the
priority terminals are closed. If set to the siren position, a siren will sound for
the duration of the closure of the priority terminals.
Inputs 2–5
Each of inputs 2 to 5 has two options selected by a slide switch located directly below the
input socket. The options are
•
Phantom Power - providing 18Vdc phantom power on the XLR socket. This
is often used to power external low current devices such as Electret
Condenser Microphones.
•
Chime – allowing the chime facility to be activated. If set, a two-note chime
will be heard through the loudspeakers when the priority terminals are closed.
Trim Control
Associated with each input 1 to 5 is a trim control located below the input. This control
allows input sensitivity to be adjusted from 1mV to 200mV. Use this control to a suitable
level for your input device (for example, a microphone will need this control to be at its
most sensitive position).
Output Connections
Line Out
The Line Out connector (see Rear Panel No.16 on Page 8) provides an output (1V) for
connection to slave amplifiers for larger systems where more power is required. The
output connections are
Pin 1 (Ground)
Pin 2 (Signal)
Page 10 of 16
Advertisement
Table of Contents
