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* [[Media:070-6499-00.pdf|Tektronix 2225 Operators and Options, French]] | * [[Media:070-6499-00.pdf|Tektronix 2225 Operators and Options, French]] | ||
* [[Media:070-6299-00.pdf|Tektronix 2225 Service]] (OCR) | * [[Media:070-6299-00.pdf|Tektronix 2225 Service]] (OCR) | ||
* [https://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf Troubleshooting tips on 2200 PSU] | * [https://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf Troubleshooting tips on 2200 PSU] | ||
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The '''Tektronix 2225''' is a 50 MHz dual-channel analog scope. | The '''Tektronix 2225''' is a 50 MHz dual-channel analog scope. | ||
It has a single timebase with | It has a single timebase with a ×5/×10/×50 magnifier that allows displaying normal and magnified traces together on the screen, but has no delay feature, only an X position control. | ||
The Y inputs feature a | The Y inputs feature a ×10 magnifier that decreases bandwidth to 5 MHz but increases sensitivity to 0.5 mV/Div. | ||
There is a '''2225ST''' model that adds digital storage. ''Further information needed'' | There is a '''2225ST''' model that adds digital storage. ''Further information needed'' | ||
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}} | }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
==Prices== | ==Prices== | ||
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* [https://www.eevblog.com/2011/08/17/eevblog-196-tektronix-2225-analog-oscilloscope/ Tektronix 2225 Analog Oscilloscope - EEVblog 196] | * [https://www.eevblog.com/2011/08/17/eevblog-196-tektronix-2225-analog-oscilloscope/ Tektronix 2225 Analog Oscilloscope - EEVblog 196] | ||
* [https://www.eevblog.com/2011/10/17/eevblog-208-tektronix-2225-oscilloscope-teardown-and-calibration/ Tektronix 2225 Oscilloscope Teardown and Calibration - EEVblog 208] | * [https://www.eevblog.com/2011/10/17/eevblog-208-tektronix-2225-oscilloscope-teardown-and-calibration/ Tektronix 2225 Oscilloscope Teardown and Calibration - EEVblog 208] | ||
==Internals== | |||
The 2225 power supply uses a [[120-1630-00]] mains-frequency toroidal transformer to produce a 60 V DC supply, followed by two TL494-driven switching regulators. | |||
The scope uses transistor array ICs like the CA3102, [[CA3046]] and CA3054, but no Tek custom ICs. | |||
==Pictures== | ==Pictures== | ||
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<gallery> | <gallery> | ||
Tek 2225.jpg | Tek 2225.jpg | ||
Tek 2225 int 1.jpg | |||
Tek 2225 int 2.jpg | |||
Tek 2225 int 3.jpg | |||
</gallery> | </gallery> | ||
| Line 63: | Line 69: | ||
Tek 2225ST 1.jpg | Tek 2225ST 1.jpg | ||
Tek 2225ST 2.jpg | Tek 2225ST 2.jpg | ||
Tek 2225ST 3.jpg | |||
Tek 2225ST 4.jpg | |||
Tek 2225ST 5.jpg | |||
</gallery> | </gallery> | ||
{{CRTs|2225}} | {{CRTs|2225}} | ||
Revision as of 04:48, 22 April 2022
The Tektronix 2225 is a 50 MHz dual-channel analog scope.
It has a single timebase with a ×5/×10/×50 magnifier that allows displaying normal and magnified traces together on the screen, but has no delay feature, only an X position control.
The Y inputs feature a ×10 magnifier that decreases bandwidth to 5 MHz but increases sensitivity to 0.5 mV/Div.
There is a 2225ST model that adds digital storage. Further information needed
The 1104A battery can be used to operate the 2225 without mains power.
Key Specifications
| Rise time | ≤7 ns (≤70 ns with ×10 vertical magnification) |
|---|---|
| Bandwidth | ≥50 MHz (≥5 MHz with ×10 vertical magnification) |
| Deflection | 5 mV/Div to 5 V/Div, 1–2–5; 500 μV/Div with ×10 vertical magnification; variable ≥2.5:1 |
| Input impedance | 1 MΩ // 25±2 pF |
| Maximum Safe Input | 400 V (DC + peak AC) or 800 Vp-p AC to ≤10 kHz |
| Trigger sensitivity | 0.3 Div or 40 mV @ 5 MHz, 1 Div or 200 mV @ 5 MHz |
| Sweep | 0.5 s/Div to 50 ns/Div, 1−2−5; ×10 Mag. down to 5 ns/Div; variable ≥2.5 : 1 |
| Z input | 5 V causes noticeable modulation (positive decreases intensity), DC to 5 MHz; max. 400 V (DC + peak AC) or 800 Vp-p AC to ≤10 kHz |
| CRT | 154-0907-00 tube, 80 × 100 mm² display, P31 phosphor, 12.6 kV acceleration |
| Power | 95–128 or 185–250 VAC, 48–440 Hz, ≤70 W (80 VA) |
| Features |
|
Prices
1990: $1,095 ($2,280 in 2021 dollars)
Links
- Tektronix 2225 Analog Oscilloscope - EEVblog 196
- Tektronix 2225 Oscilloscope Teardown and Calibration - EEVblog 208
Internals
The 2225 power supply uses a 120-1630-00 mains-frequency toroidal transformer to produce a 60 V DC supply, followed by two TL494-driven switching regulators.
The scope uses transistor array ICs like the CA3102, CA3046 and CA3054, but no Tek custom ICs.
Pictures
2225
2225ST
CRTs used in the 2225
| Page | Part nos | Description | Designers | Used in |
|---|---|---|---|---|
| 154-0907-00 | 154-0907-00 | CRT | 2225 • 2225ST |
Custom ICs used in the 2225
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