Cambridge Audio 840A user manual Custom Installation C.I. USE, Remote control commands positive

IR Emitter

Control Bus

It is then possible to control the source equipment from the remote rooms by using the source equipment's own remote controls or through a learning remote. The Incognito LR10 can fully control the keypads, “learn” the source's remote control codes (including those from other manufacturers) and change source input on the amplifier etc.

On the front panel display of the 840A the extra multi-room zones are indicated by a circle outline next to the input source (see Fig. 1). When listening to the same source, the circle outline and solid circle overlap (see Fig. 2).

Fig. 1 - One or both keypads are listening to a different source (Input 2) to the amplifier (Input 1).

Mode

Volume

Fig. 2 - One or both keypads are listening to the same source (Input 2) as the amplifier (Input 2).

Mode

Volume

For further details on the Incognito multi-room system please contact your local Cambridge Audio dealer.

840A Class XD integrated amplifier

CUSTOM INSTALLATION (C.I.) USE

The 840A features a Control Bus

input/output that allow un-modulated	In	In	Out	RS232C
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. An RS232 port is also featured which allows the 840A to be controlled by C.I. systems.

In addition the units feature 'direct' IR/Control codes as well as toggle codes for some of their features to simplify programming custom installation systems. Special direct On/Off and Mute commands can be accessed on the supplied remote control for teaching into C.I. systems as follows:

1.Press and hold the Standby/On button. The remote first generates it's standby (toggle) command. Keep the button held down, after 12 seconds an amplifier “On” command will be generated. If the button is kept held down for a further 12 seconds, an amplifier player “Off” command is generated.

2.Press and hold the Mute button. The remote first generates it's 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.

A full code table and RS232 protocol for this product is available on the Cambridge Audio website at www.cambridge-audio.com.

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