TG501: Difference between revisions
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* [ | {{TM500 | mfg=Tektronix | type=TG501 | function=time-mark generator | class=pulse generator | image=Tek tg501 on.JPG | introduced=1974 | discontinued=1990 | | ||
manuals= | |||
'''TG501''' | |||
* [[Media:070-1576-00.pdf|TG501 Manual 070-1576-00]] | |||
* [[Media:070-1576-02.pdf|TG501 Manual 070-1576-02]] (OCR, stitched schematics) | |||
* [[Media:050-1425-02.pdf|TG501 Product Mod 050-1425-02]] | |||
* [[Media:TG501 schematics.pdf|TG501 Schematics, stitched]] | |||
}} | |||
It was replaced by the [[TG501A]] in 1990. | |||
Note the [https://www.eevblog.com/forum/repair/tektronix-tg501-out-put-problem/ output must be terminated into 50 Ω] or there may be no signal at all. | |||
{{BeginSpecs}} | |||
{{Spec | Interval | 1 ns to 5 s in 1−2−5 sequence }} | |||
{{Spec | Timing accuracy | Stability 1×10<sup>-5</sup>, long-term drift 1×10<sup>-5</sup> per month (with Option 1, 5×10<sup>-7</sup> / 1×10<sup>-7</sup> per month) }} | |||
{{Spec | Error Readout | Accuracy 1 digit (±0.1% points), Range to ±7.5% }} | |||
{{Spec | Amplitude | ≥1 V peak on 5 s through 10 ns; ≥750 mV<sub>p-p</sub> on 5 ns and 2 ns; ≥200 mV<sub>p-p</sub> on 1 ns (separate output) (all into 50 Ω) }} | |||
{{Spec | Trigger Output | Slaved to marker output from 5 s through 100 ns. Remains at 100 ns for all faster markers }} | |||
{{Spec | External Reference Input | 1 MHz, 5 MHz or 10 MHz; TTL compatible (internally hard wired so output frequencies counted down to 1 MHz) }} | |||
{{EndSpecs}} | |||
* Option 01 adds a 5 MHz tempature-compensated crystal oscillator (Y50), and a TTL decade counter (U50) for a stable, precise internal clock. | |||
==Links== | |||
* See the [[TG501/Repairs]] page for repair information.* [https://www.youtube.com/watch?v=FIe9WzdIZ9g TG501 Repair and Calibration] by Zenwizard Studios @ YouTube | |||
* [https://www.youtube.com/watch?v=rF5V7D0VZeE TG501 In-Depth Troubleshooting of a Stubborn Unit] by Zenwizard Studios @ YouTube | |||
* [https://www.youtube.com/watch?v=1t7ndiKzYI8 TG501 In-Depth Troubleshooting of a Stubborn Unit Part 2] by Zenwizard Studios @ YouTube | |||
{{Documents|Link=TG501}} | |||
{{PatentLinks|TG501}} | |||
==Rear Interface== | |||
<small> | |||
{| class="wikitable" | |||
|- | |||
! colspan="2" | Connector Pin | |||
! rowspan="2" | Description | |||
|- | |||
! Signal | |||
! Return | |||
|- | |||
| 28A || 27A || Marker Out (requires front BNC disconnection) | |||
|- | |||
| 27B || 28B || Trigger Out (requires front BNC disconnection) | |||
|- | |||
| 25A || 26A || Internal 1 MHz Clock Out (TTL) | |||
|- | |||
| 24B || 25B || External Clock Input | |||
|- | |||
| 26B || 22B || Data Good (High when BCD data valid) | |||
|- | |||
| 17A..20A || 22B || bit 4..1 BCD Display data, MSD | |||
|- | |||
| 21A..24A || 22B || bit 4..1 BCD Display data, LSD | |||
|- | |||
| 16A || 22B || Fast=Low, Slow=High | |||
|} | |||
</small> | |||
==Internals== | |||
The TG501 internally produces a 1 MHz reference clock, either from an internal crystal oscillator, or from an externally supplied frequency. | |||
A 100 MHz VCO is phase-locked to this reference frequency (in fixed-frequency mode) or to the output of a variable 1 MHz astable multivibrator (in variable frequency mode). | |||
When the variable oscillator is in use, its frequency is digitally compared to the fixed 1 MHz reference and displayed as a deviation in percent with a pair of LEDs indicating the sign (fast or slow). | |||
A chain of dividers running off the 100 MHz clock provide the selectable output markers. | |||
The 1 ns output uses a [[step recovery diode]] (HP 5082-8872, part [[152-0503-00]]). | |||
==Prices== | |||
{| class="wikitable sortable" | |||
|- | |||
! Year | |||
! 1975 | |||
|- | |||
! Catalog Price | |||
| align="right" | $745 | |||
|- | |||
! In 2023 Dollars | |||
| align="right" | $4,300 | |||
|} | |||
==Pictures== | |||
===TG501=== | |||
<gallery> | <gallery> | ||
Tek tg501 on.JPG | TG501 early version | |||
Tg 501 late.jpg | TG501 late version | |||
Tek tg501 internal1.jpg | |||
Tek tg501 internal2.jpg | |||
Tek tg501 internal3.jpg | |||
Tek tg501 internal4.jpg | |||
Tek tg501 internal5.jpg | |||
Tek tg501 internal6.jpg | |||
Tek tg501 internal7.jpg | |||
Tek tg501 early left.jpg | TG501 early version | |||
Tek tg501 early right.jpg | TG501 early version | |||
Tek tg501 waveform.jpg | TG501 output waveform | |||
</gallery> | </gallery> | ||
==Parts== | |||
{{Parts|TG501}} | |||
[[Category:Time mark generators]] |
Latest revision as of 02:48, 11 October 2024
The Tektronix TG501 is a time-mark generator plug-in for the TM500 system.
It was replaced by the TG501A in 1990.
Note the output must be terminated into 50 Ω or there may be no signal at all.
Key Specifications
Interval | 1 ns to 5 s in 1−2−5 sequence |
---|---|
Timing accuracy | Stability 1×10-5, long-term drift 1×10-5 per month (with Option 1, 5×10-7 / 1×10-7 per month) |
Error Readout | Accuracy 1 digit (±0.1% points), Range to ±7.5% |
Amplitude | ≥1 V peak on 5 s through 10 ns; ≥750 mVp-p on 5 ns and 2 ns; ≥200 mVp-p on 1 ns (separate output) (all into 50 Ω) |
Trigger Output | Slaved to marker output from 5 s through 100 ns. Remains at 100 ns for all faster markers |
External Reference Input | 1 MHz, 5 MHz or 10 MHz; TTL compatible (internally hard wired so output frequencies counted down to 1 MHz) |
- Option 01 adds a 5 MHz tempature-compensated crystal oscillator (Y50), and a TTL decade counter (U50) for a stable, precise internal clock.
Links
- See the TG501/Repairs page for repair information.* TG501 Repair and Calibration by Zenwizard Studios @ YouTube
- TG501 In-Depth Troubleshooting of a Stubborn Unit by Zenwizard Studios @ YouTube
- TG501 In-Depth Troubleshooting of a Stubborn Unit Part 2 by Zenwizard Studios @ YouTube
Documents Referencing TG501
Patents that may apply to TG501
Page | Title | Inventors | Filing date | Grant date | Links |
---|---|---|---|---|---|
Patent US 3562464A | Cam actuated switch having movable and fixed contacts on circuit board | Howard Vollum • Willem H Verhoef • Tony Sprando | 1968-10-07 | 1971-02-09 | Cam switches • 2101 • 2701 • 2703 • 432 • 434 • 465 • 475 • 5A15N • 5A18N • 5A20N • 5A21N • 5A38 • 5A45 • 5B10N • 5B12N • 7A15 • 7A16A • 7A18 • 7A19 • 7A24 • 7A26 • 7B10 • 7B15 • 7B50 • 7B51 • 7B52 • 7B53A • 7B50A • 7B70 • 7B71 • 7B80 • 7B85 • 7B87 • 7B92 • 7B92A • 7D01 • 7D12 • 7D15 • 7J20 • 7S12 • 7T11 • 7T11A • AF501 • AM502 • AM503 • DC502 • DC503 • DC504 • DC505 • DM501 • DM502 • FG501 • FG501A • FG502 • FG503 • FG504 • FG507 • PG501 • PG502 • PG505 • PG506 • PG506A • PG508 • TG501 • SC502 • SC503 • SC504 |
Rear Interface
Connector Pin | Description | |
---|---|---|
Signal | Return | |
28A | 27A | Marker Out (requires front BNC disconnection) |
27B | 28B | Trigger Out (requires front BNC disconnection) |
25A | 26A | Internal 1 MHz Clock Out (TTL) |
24B | 25B | External Clock Input |
26B | 22B | Data Good (High when BCD data valid) |
17A..20A | 22B | bit 4..1 BCD Display data, MSD |
21A..24A | 22B | bit 4..1 BCD Display data, LSD |
16A | 22B | Fast=Low, Slow=High |
Internals
The TG501 internally produces a 1 MHz reference clock, either from an internal crystal oscillator, or from an externally supplied frequency.
A 100 MHz VCO is phase-locked to this reference frequency (in fixed-frequency mode) or to the output of a variable 1 MHz astable multivibrator (in variable frequency mode). When the variable oscillator is in use, its frequency is digitally compared to the fixed 1 MHz reference and displayed as a deviation in percent with a pair of LEDs indicating the sign (fast or slow).
A chain of dividers running off the 100 MHz clock provide the selectable output markers.
The 1 ns output uses a step recovery diode (HP 5082-8872, part 152-0503-00).
Prices
Year | 1975 |
---|---|
Catalog Price | $745 |
In 2023 Dollars | $4,300 |
Pictures
TG501
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TG501 early version
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TG501 late version
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TG501 early version
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TG501 early version
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TG501 output waveform
Parts
Some Parts Used in the TG501
Part | Part Number(s) | Class | Description | Used in |
---|---|---|---|---|
152-0503-00 | 152-0503-00 | Discrete component | 500 ps step recovery diode | 1503C • TG501 • TG501A |
Signetics N8T06B | 156-0379-00 | Monolithic integrated circuit | 7-segment driver | TG501 |