User Manual

Allen & Heath 21 XB-14 User Guide
8
9
10
7
9
10
LR
BAL
=
SIGNAL
PFL
PEAK
OO +6
PRE
PGM
FDR
BUS
AUX
0
5
10
15
20
30
40
50
OO
MIX B
+START/CUE
STEREO INPUT CHANNELS ST1 & ST2
FOR CLARITY ONLY ST1 CHANNEL IS DESCRIBED HERE
7
BAL
The balance control adjusts the relative levels of the left & right signals in
the stereo input channel as they are sent to the PGM bus and the MIX B
bus. Set to the mid position, the signals are balanced equally. With the
balance control set fully anticlockwise the right channel will be fully at-
tenuated and the left channel will increase by approximately 3.5dB.
ON (+START/CUE) switch
The stereo channel ON switch operates the stereo channel mute cir-
cuitry, turning the signals to the PGM, MIX B and Aux buses on or off.
The switch is illuminated green when pressed.
The ON switch also activates the START/CUE logic signals (for the cor-
responding selected input) wired to the remote interface connector on
the rear panel.
There is an option to disable the mute circuit on all the stereo channels
(make the channels permanently ON) using the option switches on the
rear panel. This can be done for all 4 stereo channels together, retaining
the illumination switching (if the ON switch is being used for Start/Cue).
It can also be done on an individual channel basis by using the STEREO
INPUTS 1,2,3&4 slide switches in which case the illumination of the
switch will be jammed permanently ON.
8
SIGNAL & PEAK LEDs
The Signal LED illuminates when the pre-fader L or R signal level is above
–15dB.
The Peak LED illuminates and stays on for around 0.5 seconds when a
peak level is detected (pre-fader signal) within 5dB of clipping.
PFL Switch
Sends the summed L & R stereo channel signals to the PFL bus.
Fader
The 100mm fader controls the level of the stereo channel L & R signals
to the PGM bus, MIX B bus and post fade Aux.
There is no fader start logic feature on the stereo channel faders.
11
11
ON ON ON ON ON ON ON ON ON ON ON ON
MONO INPUTS
1234 T1T212 34
STEREO INPUTS
)
ON Switch Not Pressed ON Switch Pressed
Channel Muted
ON ON ON ON ON ON ON ON ON ON ON ON
MONO INPUTS
1234 T1T212 34
STEREO INPUTS
)
Channel ON
Channel ON
Channel ON
Standard
Operation
STEREO
ON Switch
Optional
Modes
Mute
Disabled
(Always ON)
LEDs FOLLOW
SWITCH
(All stereos)
ON ON ON ON ON ON ON ON ON ON ON ON
MONO INPUTS
1234 T1T212 34
STEREO INPUTS
)
Channel ON Channel ON
Mute
Disabled
(Always ON
All Stereos)
LEDs always
illuminated
(On ST1 only)
CUE Deck START Deck
CUE Deck
START Deck
START Deck
CUE Deck