Dolby Laboratories CP65 Two-channelNoise, Reduction Module, 2 4 Channel Decoder, 7,8,9, Cat No

2-12

Slot
No.	Card	Function
5	Cat. No. 222	Contains two channels of Dolby A-type noise
	Two-channel Noise	reduction circuitry with LED indicators to set
	Reduction Module	Dolby Level.
6	Cat. No. 150	Derives left, right, center, and surround
	2:4 Channel Decoder	information from the two optical tracks on the
	Card	film.
7,8,9	Cat. No. 64B	Contains treble and bass controls and 27
	Equalizer Module	third-octave equalizer controls. One card is used
		for each front channel: left, center, right.
10	Cat No. 441	(1) Provides equalization for the surround
	Surround Equalizer,	channels.
	Subwoofer card.	(2) Extracts low frequency information from the L,
		C, and R signals and sends this signal to a
		subwoofer output through an equalizer and a fader
		circuit.
		(3) Provides Subwoofer input for magnetic and
		digital soundtracks and Stereo Surround from a
		Dolby Digital adapter.
		Note: Cat. No. 241 may also be used in this
		position but does not provide (3) above.
11	Cat. No. 242	Contains the signal processing circuitry for the
	B-Chain Card	B-Chain except for the equalizers. Has input buffers
		and filters for non-sync, aux and magnetic sources,
		electronic switches to select input sources, a 4-
		channel fader circuit, and output level
		potentiometers for L,C,R,S.
12	Cat. No. 443	Configures the CP65 for the selected format.
	Control Logic Card	Also contains fader mute and fader local/remote
		status circuits. Generates control logic signals for
		other cards in the CP65. Its inputs are the Cat.
		No. 447 front panel controls, external remote
		boxes, or automation inputs to the CP65. It also
		contains a jumper block to enable the wake-up
		condition to be preselected.