Operation Manual

10
The 851W features a Control Bus input/output that
allow un-modulated remote control commands
(positive logic, TTL level) to be received electrically
by the unit and looped to another unit if desired.
These control commands are typically generated
by custom installation (multi-room) systems or
remote IR receiver systems. The Control Bus sockets are colour-coded
orange.
An IR Emitter Input is also provided that allows modulated IR remote
control commands to be received electrically by the unit. Commands on
this input operate the unit only and are not looped out demodulated on
the Control Bus Output.
The unit responds to ‘direct’ IR/Control codes as well as toggle codes
for some features to simplify programming custom installation systems.
Special direct On/Off and Mute commands can be accessed from the
851E pre-amplier remote control for teaching into C.I. systems as
follows:
1. Press and hold the Standby/On button. The remote rst generates
a standby (toggle) command. Keep the button held down, after 12
seconds an amplier “On” command will be generated. If the button
is kept held down for a further 12 seconds, an amplier player “Off”
command is generated.
2. Press and hold the Mute button. The remote rst generates a mute
(toggle) command. Keep the button held down, after 12 seconds a
“Mute on” command will be generated. If the button is kept held down
for a further 12 seconds, a “Mute off” command is generated.
These commands are recognised by the 851W via the IR Emitter input.
A code table for this product is available on the Cambridge Audio website:
www.cambridgeaudio.com
Custom installation (C.I.) use
IR Emitter
In In Out
RS232C
Control Bus
Normal stereo Control Bus connections
When using the 851W in either Bi-amped dual mono connection or in
Bridged dual mono connection the following Control Bus connections
must be made.