Usb Selection And Playback; Usb Connector - ALLEN & HEATH ZED 420 User Manual

4
RETURN
ST3 INPUT SOURCE
2
3
PLAYBACK SOURCE
USB SEND SOURCE
1
All up =LR post
PLAYBACK
LEVEL
5
OO
6
7
PFL
Allen & Heath
USB SECTION & PLAYBACK
USB
SEND
ST3 IN
USB
2TRK
USB
MTX
1-2
AUX
1-2
AUX
5-6
LR
pre-fade
+6
PLAYBACK
To LR
USB Send Source Selection
1
The USB source selection switches determine which signals are
sent out on the USB interface. If all the switches are up the
main LR mix post-fade signal is sent. Other sources available are
the pre-fade main LR mix, Auxes 5&6, Auxes 1&2 and Matrix
1&2.
The switches work on a priority system with the upper switch
taking priority—so if all the switches are pressed in for exam-
ple, the Matrix 1&2 would be selected as the source.
ST3 Input Source Selector
2
This switch determines the signal source for the ST3 input. In
the out position the source is the ST3 phono connectors, the in
position is the stereo USB return.
Playback Input Source Selector
2
This switch determines the signal source for the Playback input.
In the out position the source is the 2TRK IN phono connec-
tors, the in position is the stereo USB return.

USB Connector

4
Standard B type USB connector.
Playback Input Level
5
Controls the level of the playback signal from off (fully attenu-
ated) to +6dB.
Playback To LR
6
Routes the Playback signal (2 TRK IN or USB return) to the
main LR mix.
Playback PFL
7
Allows monitoring of the Playback signal (pre-Level) in head-
phones and on the main LR meters. Note the monitoring will
be in mono.
26 ZED-4 BUS User Guide