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Doc No. DCP0000518 JH 12/7/99 rev2
Output connections
Loop output
The output is via two 30A 4mm terminal
posts. Connection can be made by way of tails or
4mm plugs. Tails are recommended as they are
very unlikely to be pulled out.
WARNING: The PDA amplifiers are capa-
ble of producing short term peaks of twice their
rated current.
Internal adjustments
Duck
Off
(Default)
No attenuation
On
For every 1 dB increase above
threshold, the microphone in-
put is attenuated by 10 dB, to
a maximum of 60dB.
The duck feature when selected, attenuates
the microphone input signal when the line input
signal passes a pre-set threshold level. The duck
is used to eliminate any echo that may be occur
due to the signal from the stage/line input being
heard, then after a short delay, heard again from
the audience response microphone which picks
up the signal amplified by the main PA system.
This will only occur when a loop system incorpo-
rating an audience response microphone is used
in conjunction with a stage/ front of house signal
feed to the line input.
Compand/ compress
Compress
(Default)
pins 1&2
At a factory set level the com-
pression ratio will be automati-
cally changed to keep prevent
clipping. This option gives the
best sound quality and should be
selected if the input is from a
mixing desk or theatre stage for
example.
Compand
pins 2&3
This option can be used set for a
system which has a large number
of microphones or is likely to
suffer from poor mic use. The
tracking compressor will give
±15dB gain to the signal to try to
keep the level as level as possi-
ble.
These adjustments should only be carried
out by qualified personnel. The power lead
must be disconnected before the top cover
is removed.
