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General| Brand | Dolby Laboratories |
|---|---|
| Model | SR 280 |
| Category | Control Unit |
| Language | English |
The Cat. No. 280 module is the first commercially available embodiment of the new spectral recording process.
Dolby spectral recording provides audible signal integrity superior to any other recording method in use.
Designed for ease of installation in existing frames and includes the Auto Compare feature for alignment.
Details frame compatibility, module design, electrical characteristics, and layout.
Covers bandwidth, distortion, dynamic range, indicators, controls, temperature, size, and weight.
Specifies power needs for the SR circuit and line amplifier.
Developed to answer needs of modern professional recording, offering a high-quality format.
Packaged like Cat. No. 22 for interchangeability; notes physical thickness difference and SR vs. A-Type compatibility.
Introduces Dolby Noise as the alignment signal for setting decode level.
Details use in various Dolby interface frames, noting specific requirements like special covers for M-Series.
Discusses limitations for SP/XP series and minor modifications needed for Cinema Products.
Basic steps involve module replacement, setting the configuration switch, and understanding indicators.
Explains how frame switches labeled for Cat. No. 22 may have different functions for Cat. No. 280.
Details connections for remote status display and Auto Compare synchronization.
Explains Dolby Noise signal and the Auto Compare feature for verifying recording channels.
Details how the Dolby Tone/Cal button and interface meters control and display Auto Compare status.
Clarifies Dolby Tone's role for A-type NR and Dolby Noise's role for SR level calibration.
Setting signal levels using tones/tapes with SR OFF; recommends 185 or 200 nWb/m for optimal performance.
Step-by-step procedure for aligning using VU meters and reference tapes.
Procedure for aligning with peak program meters, recommending specific headroom.
Details setup for Model 360, including linking Tone/Cal buttons and Auto Compare initiation.
Describes Model 361 changeover operation and Auto Compare sequence availability.
Details M-Series operation and Auto Compare availability in record/playback modes.
Introduces SR process, SR stage design, Least Treatment Principle, Action Substitution, and Modulation Control.
Covers Overshoot Suppression, noise reduction effects, and dynamic action characteristics.
Details antisaturation effects and general calibration arrangements.
Using Pin D for remote status display, Pin A for external pink noise, and Pin C for synchronization.
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