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 three probes, the standard P6451 8-channel + clock data acquisition probe, the optional 16-channel P6406 word recognizer probe (both of these use 012-0747-00 cable harnesses to attach to the data source), and the P6107 ×10 probe for serial or signature analysis.
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 |
| Signature analysis | 20 MHz via serial probe input (data) and P6451 (0 start, 1 stop, C clock); up to 8 recent signatures displayed |
| — Display — | |
| CRT | 154-0814-00, 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
Documents Referencing 308
| Document | Class | Title | Authors | Year | Links |
|---|---|---|---|---|---|
| Tekscope 1980 V12 N1.pdf | Article | New Products | 1980 | 308 • SG505 • 8002A | |
| Tekscope 1980 V12 N2.pdf | Article | Portable Analyzer Speeds Test and Service of Microprocessor-Based System | Ed Averill • John Huber | 1980 | 308 |
Patents that may apply to 308
| Page | Title | Inventors | Filing date | Grant date | Links |
|---|---|---|---|---|---|
| Patent US 3976864A | Apparatus and method for testing digital circuits | Gary B. Gordon • George A. Haag • Jan R. Hofland • Daniel I. Kolody | 1974-09-03 | 1976-08-24 | Signature analysis • 308 • SA501 |
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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Internal side of the power supply
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Internal side of the power supply
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Bottom (CRT board and card cage)
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Bottom CRT board SN303537-UP
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
Operation
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Tek 308 used for Signature Analysis on an HP multimeter
Components
Some Parts Used in the 308
Patents that may apply to 308
| Page | Title | Inventors | Filing date | Grant date | Links |
|---|---|---|---|---|---|
| Patent US 3976864A | Apparatus and method for testing digital circuits | Gary B. Gordon • George A. Haag • Jan R. Hofland • Daniel I. Kolody | 1974-09-03 | 1976-08-24 | Signature analysis • 308 • SA501 |