Audio Developments AD144 - Manual (Page 28)

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The master module has two transformer balanced outputs which appear on XLRs.
Signals from the main group outputs A, B, C & D and the input channels can be
routed to the master left & right outputs.
Auxiliary attenuators (2) to (5) and source switches (19) to (22) are identical with those
of the mic/line modules. A mix of left and right signal paths is used to drive the
auxiliary sends.
There are four sets of controls on the module that determine how the main group
signals A, B, C & D are routed to the master left and right outputs. Each group has its
own level control, which acts purely as an attenuator. When the level controls (6) to
(9) are set to mark 10 (fully clockwise), the sources routed to master left and right
outputs will track these sources.
The panoramic potentiometers (23) to (26) route the signal from each group
proportionately between master lelt and right outputs. Routeing switches (15) are
independent of each other and also act as mutes.
The push switch (18) routes the input signals from the channel busses to the left and
right master outputs. Signals from the input modules are routed to the channel busses
by selection of the MON switch mounted on each channel. The panoramic
potentiometer route the input signal proportionately between left and right channel
buss.
The PFL (pre-fade listen) (10) to (14) route the signal at the level control and fader
input to monitor 2, i.e. headphones output jack. PFL overrides any other signal
appearing on monitor 2. The indicator shows when any one or combination of any of
the five PFL switches are selected.
Limiters may be switched into left and right master outputs. The two limiters are linked
for parallel tracking when left and right master outputs are used as a stereo pair. If this
is not required the link can be broken by operation of an internal DIL switch. See
Technical Section.
The Penny & Giles fader (17) is calibrated in its fully open position and control the
level of the left and right output signal.
A 1kHz line-up tone can be injected into left and right master output by selecting
switch (1). This replaces all other signals present on the master output.