FG502: Difference between revisions
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{{TM500 | mfg=Tektronix | type=FG502 | function=function generator | class=function generator | image=Tek_fg502_2.jpg | introduced=1974 | discontinued=1993 | | {{TM500 | mfg=Tektronix | type=FG502 | function=function generator | class=function generator | image=Tek_fg502_2.jpg | introduced=1974 | discontinued=1993 | designers=Steve Stanger | ||
manuals= | |manuals= | ||
* [ | * [[Media:070-1706-00.pdf|Tektronix FG502 Manual -00]] | ||
* [[Media:070-1706-01.pdf|Tektronix FG502 Manual -01]] (OCR) | |||
}} | }} | ||
It generates low distortion sine, square, triangle, positive and negative pulse, and ramp waveforms | It generates low distortion sine, square, triangle, positive and negative pulse, and ramp waveforms from 0.1 Hz to 11 MHz. | ||
from 0.1 Hz to 11 MHz. | |||
The FG502 was designed by [[Steve Stanger]]. | |||
A squarewave trigger is available at the front panel. Variable DC offset is also provided. | A squarewave trigger is available at the front panel. Variable DC offset is also provided. | ||
| Line 16: | Line 18: | ||
depending on the gating signal width and the generator frequency setting. | depending on the gating signal width and the generator frequency setting. | ||
{{ | {{BeginSpecs}} | ||
{{Spec| Frequency | 0.1 Hz to 11 MHz (Sine, Square, Triangle), 0.01 Hz to 1.1 MHz (Ramp, Pulse), resolution 10<sup>-4</sup> }} | |||
{{Spec| Frequency stability | ≤0.1% for 1 hour, ≤0.5% for 24 hours (ambient +25±5°C) }} | |||
{{Spec| Frequency accuracy | ≤3% of full scale from 0.1 Hz to 1 MHz. ≤5% of full scale from 1 MHz to 10 MHz}} | |||
{{Spec| Output Amplitude | ≥10 V<sub>p-p</sub> open circuit. ≥5 V<sub>p-p</sub> into 50 Ω (@ 10 kHz)}} | |||
{{Spec| Output Offset | ≥±5 V<sub>p-p</sub> open circuit. ≥±2.5 V<sub>p-p</sub> into 50 Ω }} | |||
{{Spec| Amplitude flatness | Sine, ±1.5 dB ref. to 10 kHz; Square, triangle ±3 dB referenced to sine }} | |||
{{Spec| Sine Distortion | ≤0.5% from 10 Hz to 50 kHz. Harmonics ≥30 dB down at all other frequencies }} | |||
{{Spec| Triangle Symmetry and Linearity | Within 1% from 0.1 Hz to 1.1 MHz, 3% from 1.1 MHz to 11 MHz }} | |||
{{Spec| Risetime | ≤20 ns (square/pulse) }} | |||
{{Spec| VCF | 10 V signal shifts frequency ≥1000:1 }} | |||
{{Spec| Ext. Gate | 0 to ≥+2 V, not to exceed +15 V }} | |||
{{Spec| Trigger Output | ≥5 V open circuit, ≥2.5 V into 50 Ω }} | |||
{{Spec| Functions | Sine, Square (50%), Triangle, + and − Ramp, + and − Pulse (5/95%) }} | |||
{{EndSpecs}} | |||
==Links== | ==Links== | ||
* [ | * [https://www.youtube.com/watch?v=SrDK0X9ye2U Tektronix FG 502 Resurrection and Repair] by Zenwizard Studios @ YouTube | ||
{{Documents|Link=FG502}} | |||
{{PatentLinks|FG502}} | |||
==Rear Interface== | |||
* Output: A28 (GND A27) | |||
* Trigger Output: B27 (GND B28) | |||
* Gate In: B24 (GND B25) | |||
* VCF In: B21 (GND B22) | |||
== Repair Issues== | |||
* See the [[FG502/Repairs|FG502 Repairs Page]] | |||
==Pictures== | ==Pictures== | ||
<gallery> | <gallery> | ||
Tek fg502 2.jpg | Tek fg502 2.jpg | ||
Tek-fg502-f.jpg | |||
Tek fg502 beat-up.jpg | Tek fg502 beat-up.jpg | ||
Tek fg502 34.jpg | Tek fg502 34.jpg | ||
| Line 29: | Line 57: | ||
Tek fg502 left internal.jpg|left internal view | Tek fg502 left internal.jpg|left internal view | ||
Tek fg502 rear.jpg|rear view | Tek fg502 rear.jpg|rear view | ||
FG502_3-4_View.jpg | |||
FG502_Front_Panel.jpg | |||
FG502_Left_Internal.jpg | |||
FG502_Right_Internal.jpg | |||
TEK-FG502-Frontplate.JPG| front plate | |||
</gallery> | </gallery> | ||
==Components== | |||
{{Parts|FG502}} | |||
Latest revision as of 03:32, 6 October 2024
The Tektronix FG502 is a function generator plug-in for the TM500 system.
It generates low distortion sine, square, triangle, positive and negative pulse, and ramp waveforms from 0.1 Hz to 11 MHz.
The FG502 was designed by Steve Stanger.
A squarewave trigger is available at the front panel. Variable DC offset is also provided.
Α voltage-controlled frequency (VCF) input controls the output frequency from an external voltage source. The output frequency can be swept above or below the selected frequency to maximum of 1000:1 depending on the polarity and amplitude of the VCF input and the selected output frequency.
An external gate input allows the generator to operate for the duration of an externally applied gating signal. This mode provides either a single cycle output, or a train of preselected waveforms, depending on the gating signal width and the generator frequency setting.
Key Specifications
| Frequency | 0.1 Hz to 11 MHz (Sine, Square, Triangle), 0.01 Hz to 1.1 MHz (Ramp, Pulse), resolution 10-4 |
|---|---|
| Frequency stability | ≤0.1% for 1 hour, ≤0.5% for 24 hours (ambient +25±5°C) |
| Frequency accuracy | ≤3% of full scale from 0.1 Hz to 1 MHz. ≤5% of full scale from 1 MHz to 10 MHz |
| Output Amplitude | ≥10 Vp-p open circuit. ≥5 Vp-p into 50 Ω (@ 10 kHz) |
| Output Offset | ≥±5 Vp-p open circuit. ≥±2.5 Vp-p into 50 Ω |
| Amplitude flatness | Sine, ±1.5 dB ref. to 10 kHz; Square, triangle ±3 dB referenced to sine |
| Sine Distortion | ≤0.5% from 10 Hz to 50 kHz. Harmonics ≥30 dB down at all other frequencies |
| Triangle Symmetry and Linearity | Within 1% from 0.1 Hz to 1.1 MHz, 3% from 1.1 MHz to 11 MHz |
| Risetime | ≤20 ns (square/pulse) |
| VCF | 10 V signal shifts frequency ≥1000:1 |
| Ext. Gate | 0 to ≥+2 V, not to exceed +15 V |
| Trigger Output | ≥5 V open circuit, ≥2.5 V into 50 Ω |
| Functions | Sine, Square (50%), Triangle, + and − Ramp, + and − Pulse (5/95%) |
Links
- Tektronix FG 502 Resurrection and Repair by Zenwizard Studios @ YouTube
Documents Referencing FG502
Patents that may apply to FG502
| 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
- Output: A28 (GND A27)
- Trigger Output: B27 (GND B28)
- Gate In: B24 (GND B25)
- VCF In: B21 (GND B22)
Repair Issues
- See the FG502 Repairs Page
Pictures
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right internal view
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left internal view
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rear view
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front plate
Components
Some Parts Used in the FG502
| Part | Part Number(s) | Class | Description | Used in |
|---|---|---|---|---|
| 151-0261-00 | 151-0261-00 | Discrete component | dual PNP transistor | AM501 • AM502 • CG5001 • CG551AP • FG501 • FG502 • FG503 • OF150 • OF151 • OF152 • OF235 • OS261 • RM502A • R1140 • R5030 • R5031 • R7912 • 067-0679-00 • 067-0807-00 • 1101 • 1140A • 1141 • 1142 • 1350 • 145 • 1450 • 1480 • 1481 • 1482 • 1485 • 1501 • 1801 • 1900 • 1910 • 1980 • 213 • 26A1 • 26A2 • 2620 • 285 • 3A9 • 3A10 • 3S1 • 3S2 • 3S5 • 3S6 • 432 • 434 • 4501 • 454 • 4601 • 4602 • 4610 • 4612 • 4620 • 4632 • 4634 • 4701 • 475 • 492 • 492A • 492AP • 494 • 494P • 496 • 496P • 5A13N • 5A20N • 5A21N • 5A22N • 5A26 • 5L4N • 502A • 5030 • 5031 • 576 • 690SR • 7A22 • 7A29 • 7B51 • 7B71 • 7J20 • 7L5 • 7S11 • 7S12 • 7912AD |