Allen&Heath GL2800 - Manual (Page 24)

24 GL2800 User Guide
TALKBACK and SIGNAL GENERATOR
TALKBACK
Individually assignable talkback is available to all the
main outputs. Plug in a suitable cable or gooseneck microphone. A
good quality dynamic or condenser vocal microphone is
recommended. Note that +48V phantom power is available at the
XLR as standard. If you prefer, this can be disabled by repositioning
an internal jumper link.
WARNING: Do not connect unbalanced sources or cables to
inputs with phantom power selected. To avoid loud clicks do not
press the TALK switch when plugging or unplugging the talkback
microphone.
TALKBACK enable First select the source you wish to talk to.
You can select the auxes in logical groups, useful for communicating
with the performers on stage. The matrix can be enabled in pairs,
ideal for working with stereo in-ear monitors or communicating with an
outside broadcast facility. You can also talk to LR and M, typically
used for announcements to the audience. Once selected, press and
hold TALK to route the mic to the required destination. Adjust the
talkback level using the TRIM control below the TB mic XLR. Pressing
TALK automatically dims the level of the signal generator if it is turned
on.
TALK latch mode Press this switch to permanently activate the
TALK switch. This is useful when using a handheld microphone with
built-in switch for talkback. It means you do not need to press the
TALK switch to talk to your enabled destinations. Simply use the
switch on the microphone. The latch switch is recessed to prevent
accidental operation. Use a pointed object to change its setting.
SIGNAL GENERATOR / PINK NOISE Press to select either
pink noise (up position) or a 1kHz sine wave tone as the test source.
Start with the trim control turned fully down. The generator ON switch
is recessed to prevent accidental operation. Press this with a pen or
pointed object. The green indicator lights to warn that the generator is
enabled.
The generator signal is routed to any source selected on the switch
bank above the TALK switch. Use the signal to test the loudspeaker
system and line up connected equipment. Pink noise is useful for
quickly testing the full range frequency operation and phasing/polarity
of loudspeakers. The 1kHz tone is better suited to lining up
equipment with its steady reading on the meters.
WARNING: We recommend you turn off the signal generator
once you have finished using it to test and line up your system.
This will prevent accidental operation during the show.
POWER
+9
+6
+3
0
-3
-12
-16
-30
-20
-9
-6
+16
+10
2TRK
R
TO LR
2TRK REPLAY
OO
L
1-2
AUX
3-4
AUX
5-8
AUX
9-10
AUX
MTX3-4
MTX1-2
LATCH
L-R
MAX MIN
MAX MIN
ON
TALKBACK
OSC/NOISE
M
TALK
M
L-R
9-10
MONITOR
2TRK
AUX
MTX4
MTX3
MTX2
MTX1
10 0
PFL/AFL
MONITOR
STEREO
STEREO
STEREO
+10 OO
9-10
AUX
1kHz OSC
PINK NOISE
PHONES