ALLEN & HEATH MixWizard WZ4 14:4:2 User Manual page 26

GROUP
MATRIX AB
BALANCE
AUX 1-4
BALANCE
SENDS 15/16
LR INSERTS
MATRIX
USB 2.0
MULTICHANNEL AUDIO
Allen & Heath
MASTER L
MASTER R
AUX5
AUX6
BALANCE
BALANCE
2 TRK SOURCE
2 TRK RETURN
USB RETURN
Output balance options
are impedance balanced as standard operating at nominal -2dBu
and with +21dBu maximum drive. They provide similar interfer-
ence rejection to electronically balanced outputs when connected
to balanced equipment inputs. An electronically balanced option
is available if you require nominal +4dBu and higher output drive
up to +26dBu over very long cable runs. However, it is not usu-
ally necessary to fit this option as the impedance balanced drive
satisfies most applications. Check that you really need the option
before fitting it.
There are two balanced driver ICs which may be used. Either is
suitable. These are available from Allen & Heath or most elec-
tronic component suppliers. The Allen & Heath part number is
shown below:
SSM2142
DRV134
For each aux master, snip the legs of the two zero ohm
resistor links next to each IC. This removes them from
the circuit. Now solder the option IC into the socket.
Observe the correct IC pin1 orientation and make sure its
legs are correctly aligned with the socket. Test the output
once the work is complete. You should measure the
same level but opposite polarity signal between + (hot)
and ground, and – (cold) and ground.
NOTE: This procedure will require the use of a soldering
iron. If you have any doubts please contact Allen & Heath and
we will put you in touch with your nearest service centre.
USB OPTION
rear USB socket as standard.
A USB multi-channel option card is available, the part
number is shown below:
004-232JIT WZ4 USB AUDIO OPTION
This is a high quality audio card that sends 16 channels
from the mixer to a computer for recording or pro-
cessing. A stereo channel is returned to the mixer for
monitoring purposes or as an effects return path.
The card sends the following channels to the computer:
Mono channels 1-10 direct out, Insert sends group 1-4,
Left/right insert sends OR Matrix outputs.
The 2 TRK source can toggled between the computer
return feed or the input sockets mounted at the rear of
the mixer.
For full details please refer to the WZ4 USB option appli-
cation note AP8987 and fitting instructions AP8988.
26
The aux and matrix outputs
A&H Part AE0302
A&H Part AE5725
A blanking plate is fitted over the
4
WZ 14:4:2 User Guide