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General| Track Format | 8-track |
|---|---|
| Equalization | NAB |
| Tape Speed | 15 ips (inches per second) |
| Reel Size | 10.5 inch |
| Frequency Response | 40 Hz to 22 kHz ±3 dB |
| Heads | Erase, Record, Playback |
| Track Configuration | 8-track, half-inch tape |
| Inputs | 8 x RCA |
| Outputs | 8 x RCA |
| Wow and Flutter | 0.06% WRMS |
Play, stop, record, pause, and status indicators.
How to use these buttons to determine record status.
Methods for making corrections during recording.
Instructions on how to load tape onto the machine.
Steps for connecting two DX-4D units for eight channels.
Describes the various input options and controls.
Detailed electrical and frequency specifications for inputs/outputs.
Details on tape format, reel size, speeds, and dimensions.
Voltage requirements, mounting, and remote control options.
Lists necessary test equipment for calibration.
Details on measuring take-up torque and back tension.
How to adjust back tension using a spring scale.
How to measure and set pinch roller pressure.
Procedures for aligning tape path and ensuring head contact.
How to adjust head azimuth for optimal playback.
Techniques for aligning heads using an oscilloscope.
How to calibrate the VU meters.
How to calibrate the reproduce signal levels.
How to check and adjust frequency response.
How to measure frequency response in REPRO and SYNC modes.
Procedures for bias tuning and trap adjustments.
How to adjust recording bias.
How to adjust recording signal levels.
How to check overall frequency response.
How to measure signal-to-noise ratio.
How to measure the erase ratio.
How to measure crosstalk between adjacent channels.
How to measure audio distortion.
Visual breakdown of the unit with corresponding part numbers.
Overall wiring diagram showing PCB interconnections.
Diagram detailing head connections to the main PCB.
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