Allen&Heath 21 Series - Manual (Page 10)

7
OUTPUT SECTION
a)
b)
c)
d)
e)
VU METERS
The VU meters can read any one of 4 signal sources:
i)
ii)
iii)
iv)
PFL: when any PFL button is pressed on the mixer, an LED
just above the right VU meter will illuminate (as a
reminder),
and the meters will follow the selected PFL
level (in mono).
The output signal level of a stereo tape recorder when
TAPE is selected in the monitor section.
The main stereo mix output from the mixer when STEREO
is selected in the monitor section.
The output from the MONO fader when MONO is selected
in the monitor section.
CUE MASTER
The master control for all the input channel cue sends.
When the associated PFL button is selected the VU meters
will show the level leaving the mixer at the cue output on
the rear panel.
ECHO MASTER
The master control for all the input channel echo sends.
When the associated PFL button is selected the VU meters
will show the level leaving the mixer at the echo output on
the rear panel.
ECHO RETURNS 1 & 2
These identical sections allow 2 line-level signals (eg the
outputs from 2 effects devices) to be added to the stereo mix.
Each have a level control, performing the same function as an
extra input channel fader, and a pan control, to position the
effects signal in the mix as desired.
A cue send control is also provided in each section, so that
a proportion of the effects signal can be sent to the
musicians' headphone monitoring or foldback system.
PFL select is available in each section to allow monitoring of
the effects signals before committing them to the main mix.
LEFT AND RIGHT MASTER FADERS
Control the output level of the stereo mix. Each provided with
a PFL switch to allow quality checks, on the left and right mix
busses independantly, prior to the final output stages of the
mixer.