PG508: Difference between revisions
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{{TM500 | {{TM500 | ||
| mfg=Tektronix | |mfg=Tektronix | ||
| type=PG508 | |type=PG508 | ||
| function=50 MHz pulse generator | |function=50 MHz pulse generator | ||
| class=pulse generator | |class=pulse generator | ||
| image=Tek PG508 front.jpg | |image=Tek PG508 front.jpg | ||
| introduced=1976 | |introduced=1976 | ||
| discontinued=1993 | |discontinued=1993 | ||
|designers= | |designers=Fred Beckett;Dennis Feucht;Tom Hill;Gary Kersey | ||
|manuals= | |manuals= | ||
* [[Media:070-2044-00.pdf|PG508 Instruction Manual]] | * [[Media:070-2044-00.pdf|PG508 Instruction Manual]] | ||
* [https://w140.com/tek_pg508_military_manual.pdf Tektronix PG508 Military Manual] | * [https://w140.com/tek_pg508_military_manual.pdf Tektronix PG508 Military Manual] | ||
}} | }} | ||
It was designed by [[Fred Beckett]], [[Dennis Feucht]], [[Tom Hill]], and [[Gary Kersey]]. | |||
Pulses can be triggered by an external input, a manual trigger button, or an internal period generator (optionally gated by the trigger input). | Pulses can be triggered by an external input, a manual trigger button, or an internal period generator (optionally gated by the trigger input). | ||
The trigger signal can be undelayed, delayed by a selectable time, or both (in which case double pulses are generated). | The trigger signal can be undelayed, delayed by a selectable time, or both (in which case double pulses are generated). | ||
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==Rear Interface== | ==Rear Interface== | ||
<small> | |||
(on right-hand plug-in slot as viewed from front) | (on right-hand plug-in slot as viewed from front) | ||
{| class="wikitable" | {| class="wikitable" | ||
Line 38: | Line 41: | ||
! Return | ! Return | ||
|- | |- | ||
| 27B || 28B || Trig output (complement polarity installed; for normal polarity, front panel input requires optional cable and front output disconnection) ''[note error on manual | | 27B || 28B || Trig output (complement polarity installed; for normal polarity, front panel input requires optional cable and front output disconnection) ''[note error on manual page 1-12; table 1-13 is correct]'' | ||
|- | |- | ||
| 24B || 25B || Trig input (with optional cable, front panel input must be disconnected) | | 24B || 25B || Trig input (with optional cable, front panel input must be disconnected) | ||
Line 49: | Line 52: | ||
|} | |} | ||
Custom connection solder pads are available on the left plug-in slot, which is otherwise used only for the associated pass transistors in the mainframe. | Custom connection solder pads are available on the left plug-in slot, which is otherwise used only for the associated pass transistors in the mainframe. | ||
</small> | |||
==References== | ==References== | ||
* Designs by the Masters – ±20 V, 5 ns, 50 Ω Amplifier (detailed discussion of the PG508 output stage). Horowitz & Hill, Art of Electronics − The x-Chapters, p.150+ | * Designs by the Masters – ±20 V, 5 ns, 50 Ω Amplifier (detailed discussion of the PG508 output stage). Horowitz & Hill, Art of Electronics − The x-Chapters, p.150+ | ||
* [[Don Hall]], [[Media:Tekscope_1976_V8_N1.pdf | ''A 50 MHz pulse generator with variable transition times''. Tekscope V.8 N.1 1976, p.13+]] | |||
==Links== | ==Links== | ||
* [https://www.youtube.com/watch?v=gtvP_a9PhG8 | * [https://www.youtube.com/watch?v=gtvP_a9PhG8 PG508 Repair and Calibration] by Zenwizard Studios @ YouTube | ||
{{Documents|Link=PG508}} | |||
==Prices== | |||
{| class="wikitable sortable" | |||
|- | |||
! Year | |||
! 1980 | |||
! 1984 | |||
|- | |||
! Catalog Price | |||
| align="right" | $1,400 | |||
| align="right" | $2,025 | |||
|- | |||
! In 2023 Dollars | |||
| align="right" | $5,200 | |||
| align="right" | $6,000 | |||
|} | |||
==Pictures== | ==Pictures== | ||
Line 60: | Line 82: | ||
Tek PG508 front.jpg | Tek PG508 front.jpg | ||
Tek PG508 01.jpg | Tek PG508 01.jpg | ||
Tek PG508 02.jpg | Output board (The black coax connection from the output stage to the left plug-in slot is non-standard.) | Tek PG508 02.jpg | Output board (The black coax connection from the output stage to the left plug-in slot is non-standard.) | ||
Tek PG508 03.jpg | Tek PG508 03.jpg | ||
Tek PG508 04.jpg | Tek PG508 04.jpg | ||
Line 72: | Line 94: | ||
</gallery> | </gallery> | ||
{{ | ==Components== | ||
{{Parts|PG508}} | |||
[[Category:TM500 pulse generator plugins]] | [[Category:TM500 pulse generator plugins]] |
Latest revision as of 09:10, 19 November 2023
The Tektronix PG508 is a 50 MHz pulse generator plug-in for the TM500 system.
It was designed by Fred Beckett, Dennis Feucht, Tom Hill, and Gary Kersey.
Pulses can be triggered by an external input, a manual trigger button, or an internal period generator (optionally gated by the trigger input). The trigger signal can be undelayed, delayed by a selectable time, or both (in which case double pulses are generated). The pulse duration, leading and trailing edge transition times, high- and low-level amplitude can be controlled independently.
Period, delay, duration, and transition time switches each feature a custom position where a user-supplied internal capacitor determines the timing.
Key Specifications
Period | external, or internal <20 ns to >200 ms in 7 decade steps plus variable; ≥200 ms possible in custom range |
---|---|
Jitter | <0.1% +50 ps |
Delay Time | <10 ns to >100 ms in 7 decade steps plus custom position and variable control; ≥100 ms possible in custom range |
Pulse Duration | square, or <10 ns to >100 ms in 7 decade steps plus custom position and variable control; ≥100 ms possible in custom range |
Transition time | Ranges 5 ns to 500 μs in decade steps plus custom position; separate ×1 to ×100 variable controls for leading and trailing edge (5 ns to 50 ms effective) |
Output level | High and low levels adjustable independently in −20 V to +20 V range, limited to max. 20 Vp-p / min. 1 Vp-p (open circuit), 50 Ω source impedance (−10 V to +10 V, 0.5 to 10 Vp-p into 50 Ω) |
Trigger/Gate input | Sensitivity 80 mVp-p to ≥10 MHz, 250 mVp-p to ≥50 MHz at 50 Ω impedance, max. ±5 Vpeak; 1 MΩ // 20 pF optionally selectable (internal switch), max. ±20 Vpeak |
Rear Interface
(on right-hand plug-in slot as viewed from front)
Connector Pin | Description | |
---|---|---|
Signal | Return | |
27B | 28B | Trig output (complement polarity installed; for normal polarity, front panel input requires optional cable and front output disconnection) [note error on manual page 1-12; table 1-13 is correct] |
24B | 25B | Trig input (with optional cable, front panel input must be disconnected) |
25A | 26A | Amplitude Monitor (from output via 27 kΩ) |
22A | External Low Level Control Input (requires internal jumper and trim) | |
22B | External High Level Control Input (requires internal jumper and trim) |
Custom connection solder pads are available on the left plug-in slot, which is otherwise used only for the associated pass transistors in the mainframe.
References
- Designs by the Masters – ±20 V, 5 ns, 50 Ω Amplifier (detailed discussion of the PG508 output stage). Horowitz & Hill, Art of Electronics − The x-Chapters, p.150+
- Don Hall, A 50 MHz pulse generator with variable transition times. Tekscope V.8 N.1 1976, p.13+
Links
- PG508 Repair and Calibration by Zenwizard Studios @ YouTube
Documents Referencing PG508
Prices
Year | 1980 | 1984 |
---|---|---|
Catalog Price | $1,400 | $2,025 |
In 2023 Dollars | $5,200 | $6,000 |
Pictures
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Output board (The black coax connection from the output stage to the left plug-in slot is non-standard.)
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Components
Some Parts Used in the PG508
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
155-0078-00 | 155-0078-xx • 155-0273-00 • 155-0274-00 | Monolithic integrated circuit | broadband amplifier | 464 • 465 • 466 • 468 • 475 • 475A • 475M • 485 • 7834 • 7844 • 7854 • 7904 • R7903 • R7912 • 7912AD • 7912HB • 7104 • 7A16A • 7A16P • 7A24 • 7A26 • 7A42 • 067-0587-01 • 067-0680-00 • AM503 • PG502 • PG508 • DC510 • DC5010 • FG5010 |