Cat. No. 790 Digital Input/Dolby Digital Surround EX Card
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The Dolby Cat. No. 790 upgrades your Dolby CP650D to a model CP650 for digital cinema and Dolby Digital Surround EX.
The Cat. No. 790 card provides four single-ended AES-3 digital inputs for PCM or coded audio (professional or consumer Dolby® Digital bitstreams) necessary for digital cinema, onscreen advertising, and alternative-content digital audio playback.
In addition to the inputs and formats included in the CP650D, the following digital audio formats are supported when the Cat. No. 790 is installed:
- Format 80, Master Digital, automatically switches between varying bitstream types (two-channel PCM/Dolby Digital).
- Format 81, Master Digital with Surround EX™, applies Surround EX decoding to Dolby Digital 5.1 bitstreams.
- Format 88, Six-Channel PCM, inputs three AES-3 PCM channel pairs to comprise a 5.1 program.
- Format 89, Six-Channel PCM with Surround EX, applies Surround EX decoding to AES channel pair number 3 (Ls/Rs).
- Format 90, Seven-Channel PCM, inputs AES-3 channel pairs to comprise a 6.1-channel (Surround EX) program.
When a Cat. No. 790 card is installed, the digital bitstreams are input on the “Option I/O” D-connector.

The Cat. No. 790 adds Dolby Digital Surround EX decoding and four surround zone channels, each with 27-band equalization.
The CP650 automatically configures the four surround zones (Ls, Bsl, Bsr, Rs), depending upon the surround processing required. A single “mono” zone (Ls + Bsl + Bsr + Rs) is applied for Dolby Pro Logic® formats. Stereo surround zones (Ls + Bsl, Rs + Bsr) are configured for 5.1 formats, and three surround zones (Ls, Bsl + Bsr, Rs) are configured for Dolby Digital Surround EX formats.
When a Cat. No. 790 card is installed, the surround channels are output from the “Option I/O” D-connector.
The Cat. No. 790 also provides the expansion slot necessary to add the Dolby Cat. No. 791 Digital Crossover Card to your CP650.
The Cat. No. 790 is contained within the CP650 upgrade kit, “UEX/650,” and can be ordered from your Dolby distributor.
Warranty
One-year limited, parts and labor; see disclaimer below.
Specifications subject to change without notice.
Disclaimer of Warranties
Equipment manufactured by Dolby Laboratories is warranted against defects in materials and workmanship for a period of one year from the date of purchase. There are no other express or implied warranties and no warranty of merchantability or fitness for a particular purpose, or of noninfringement of third-party rights (including, but not limited to, copyright and patent rights).
Limitation of Liability
It is understood and agreed that Dolby Laboratories' liability, whether in contract, in tort, under any warranty, in negligence, or otherwise, shall not exceed the cost of repair or replacement of the defective components or accused infringing devices, and under no circumstances shall Dolby Laboratories be liable for incidental, special, direct, indirect, or consequential damages (including, but not limited to, damage to software or recorded audio or visual material), cost of defense, or loss of use, revenue, or profit, even if Dolby Laboratories or its agents have been advised, orally or in writing, of the possibility of such damages.