308
The Sony/Tektronix 308 is a portable 8-channel, 20 MHz "data analyzer" (logic analyzer) with parallel timing, parallel state, serial (up to 9600 bps) and signature analysis modes.
The 308 uses two probes, the standard P6451 8-channel + clock data acquisition probe, and the optional 16-channel P6406 word recognizer probe. Both use 012-0747-00 cable harnesses to attach to the data source.
Key Specifications
| — Inputs — | |
| Data | Eight data channels + 1 clock channel (P6451 probe), impedance 1 MΩ // 5 pF, max. ±40 V nondestructive, logic threshold fixed 1.4 V (TTL) or variable from −12 V to +12 V |
| Word recognizer | Sixteen TTL inputs (+40/−400 μA max.), max. +15/−1 V |
| Serial | BNC connector, 1 MΩ // 40 pF, max. ±250 V on BNC; used with P6107 probe, 10 MΩ // 13 pF, max. ±500 V |
| Qualifier | BNC connector, 10 kΩ, max. +10/−5 V |
| — Acquisition — | |
| Clock | 50 ns to 200 ms per sample (1-2-5 sequence) or external down to 50 ns |
| Timing | Data setup time min. 25 ns, hold time min. 0 ns |
| Memory | 2 × 252 eight-bit words (acquisition + reference) |
| Trigger mode | PRE (trigger at memory location 240) or POST (location 13) |
| Trigger delay | 0-65535 clock periods |
| Serial data | 5, 6, 7 or 8 bits per character, asynchronous (50, 75, 110, 134.5, 150, 200, 300, 600, 1200, 1900, 2400, 4800 or 9600 bits/s or external up to 9600 bits/s) or synchronous up to 9600 bits/s |
| — Display — | |
| CRT | 6.8 cm × 5.4 cm, P4 phosphor (white) |
| — General — | |
| Power | 90-132 V or 180-250 V, 48-440 Hz |
| Weight | 3.7 kg (8.16 lb) |
Links
- Tekscope Vol. 12 No. 2, Apr 1980, Ed Averill, John Huber: Portable Data Analyzer Speeds Test and Service of Microprocessor-Based Systems
- Tek 308 @ radiomuseum.org
- Tek 308 @ barrytech.com
Internals
The 308 is built around an Intel 8085A microprocessor. The display is a magnetically deflected raster-scan CRT. The only Tek-specific IC in the 308 is a 155-0067-02 SMPS controller.
Pictures
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308 display, timing mode (binary counter example)
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308 display, state mode (binary counter example)
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Internals
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Top left
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Top right
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Top right (2)
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Boards unfolding
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Boards unfolding (2)
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Input board
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Trigger board
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back side of input and trigger boards
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Signature/Serial board
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CPU board
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CRT module
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Power supply, top
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Power supply, bottom
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Bottom (CRT board and card cage)
Probes
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P6451 probe
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P6451 probe
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P6451 probe internal, PCB front
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P6451 probe internal, PCB back
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P6406 word recognizer probe
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P6406 case close-up
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P6406 PCB front
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P6406 PCB back
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Using P64xx probes with jumper wires
Some Parts Used in the 308
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 154-0814-00 | 154-0814-00 | CRT | CRT | 308 |
| 155-0067-02 | 155-0067-00 • 155-0067-02 • 155-0067-03 | Monolithic integrated circuit | SMPS controller | 7704A • 7834 • 7844 • 7854 • 7904 • R7903 • 7904 • 7904A • 7934 • R7912 • 7912AD • 7912HB • 7934 • 7104 • R7103 • 308 • 434 • 485 • 690 • P7001 |
| 2316E | Monolithic integrated circuit | 2K×8 ROM | 308 | |
| 2364 | Monolithic integrated circuit | 8K×8 ROM | 308 | |
| Intel 8085A | 156-1088-00 | Monolithic integrated circuit | 8-bit microprocessor | 308 • 468 • 4025 • 7A42 • 7D02 • AFG5101 • AFG5102 • PFG5105 |