Operation Manual

6
REAR PANEL OF STANDARD VNET SC1
REAR PANEL OF NETWORK ENABLED VNET SC1
Power
Inlet
Blanking
Plate
Secure Mode
Switch
VNET
TM
Network Port
Audio Input
Connectors
Audio Output
Connectors
Serial Comms
Port
POWER INLET
The Tannoy VNET SC1 unit should be connected to a suitable mains electricity supply using the cable supplied. The
processor has a switch mode power supply that is capable of operating with a nominal mains voltage of 85V to 240V,
50/60Hz without re-configuration.
VNET NETWORK PORT (
ON NETWORKED ENABLED VNET
TM
SC1 ONLY)
The network enabled VNET SC1's feature two VNet network ports. This allows for connection to any VNET
TM
system.
AUDIO INPUT CONNECTORS
All audio connections are fully balanced and wired pin-1 ground, pin-2 hot & pin-3 cold. The two inputs have pin-1 connected
directly to the chassis and feed the signal processing chains. If an unbalanced source is used, a connection should be made
between the pin-3 ‘cold’ signal and the ground connection of the unbalanced source.
AUDIO OUTPUT CONNECTORS
The processed outputs are impedance balanced, and wired pin-1 ground, pin-2 hot and pin-3 cold. An unbalanced input may
be driven by connecting pin-3 ‘cold’ signal to the ground connection of the unbalanced destination input. Note that output pin-
1’s are ground lifted at audio frequencies but connected to ground at RF for good EMC performance. The intention being that
the amplifiers the processor is driving should be responsible for the grounding of their input cable shields.
COMMUNICATIONS PORT CONNECTOR
annoy VNET
TM
SC1 processors may be controlled entirely from another controller, typically a Personal Computer, running
VNET
TM
Software. Connection will normally be made to the controller via this serial port connector. This port is also used for
updating the firmware in the unit.
Note that the communications port is NOT disabled when the front panel is made secure using the secure button.
SECURE MODE SWITCH
A momentary button is fitted behind the rear panel, between the output XLRs and the RS232 port. When activated, this will
disable all the front panel controls so they cannot affect the signal path, making the unit secure against tampering. When in
secure mode, the indicators still operate normally and the menu can still be navigated to allow viewing of parameters.
Pressinig this button again will take the unit out of security mode.
Note that the communications port is still active in secure mode.