Dolby Laboratories CP65 - Manual (Page 18)

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.