Allen&Heath GL3800 - Manual (Page 19)

GL3800 User Guide 19
The STEREO Return Channel
Two additional dual stereo return channels are provided. Each has
two stereo line inputs which can be mixed together or used
separately. ST1 and ST3 can be routed directly to LR instead of the
return channels. This gives you the flexibility of mixing in four more
stereo sources in a small panel space.
ST1 INPUT
A level control adjusts from fully off to +16dB gain.
The L input signal is normalled through the R input socket so that a
mono source may be plugged in to feed both left and right sides of the
stereo channel. A recessed switch can be set to route the source
directly to the L-R mix instead of the return channel. Use a pointed
object to change the switch setting.
ST2 INPUT A level control adjusts from fully off to +16dB gain.
The L input signal is normalled through the R input socket so that a
mono source may be plugged in to feed both left and right sides of the
stereo channel.
AUX SENDS Use these controls to feed the return signal to a
combination of the auxes. The stereo signal is summed to feed Aux 1
and Aux 2 in mono. The signal feeds aux 9-10 in stereo. Internal
jumper options are provided to set the auxes pre or post-fader. Default
setting is post-fade so that the fader provides master control for all the
sends.
MUTE When pressed, all the channel pre and post-fade signals are
turned off except ST1 or ST3 if routed direct to LR.
PFL Press PFL to display the summed L+R pre-fade channel signal
on the monitor meters and listen to it in the headphones and local
monitor without affecting the main outputs.
ROUTING Routes the left signal to L and odd group 1 or 3, and the
right signal to R and even group 2 or 4, and sums L and R to feed the
M mix in mono. Return channel ST1-2 can be routed to Groups 1-2,
and ST3-4 can be routed to Groups 3-4.
FADER A 60mm stereo fader provides +10dB maximum boost
above its normal unity gain 0dB position.
Applications for the stereo channels and returns are described later in
this user guide.
30
O O
5
20
10
0
5
10
DUAL STEREO RETURN
STEREO
STEREO
ST4
ST3
MUTE
DIRECT TO LR
GAIN
L-R
3-4
M
GAIN
+6
9-10
AUX
2
AUX
1
AUX
OO
+6 OO
+6 O O
PFL
-10
-20 10
16
-5 0
5
O O
-10
-20 10
16
-5 0
5
O O