2225

Tektronix 2225
50 MHz dual-channel scope Tektronix 2225 Produced from 1987 to 1992 Manuals Tektronix 2225 Operators and Options Tektronix 2225 Operators and Options, French Tektronix 2225 Service 070-6299-00 (1987) / 1990 Troubleshooting tips on 2200 PSU (Manuals are OCRed PDF files unless noted otherwise)

Manuals – Specifications – Links – Pictures

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

A 2225 equipped with option 07 (internal DC inverter) can be powered ≥2 hours from an 1104A battery at 20-30 DEG C.

The 2225 was known internally as Euroscope. It was initially developed in Hoddesdon, UK and then produced in Tek's Heerenveen facility.

Key Specifications

Risetime	≤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
Max. input	400 V (DC + peak AC) or 800 V_p-p AC to ≤10 kHz
Sweep	0.5 s/div to 50 ns/div , 1−2−5; ×10 mag. down to 5 ns/div; variable ≥2.5 : 1
Trigger	0.3 div or 40 mV @ 5 MHz, 1 div or 200 mV @ 5 MHz
Z input	5 V causes noticeable modulation (positive decreases intensity), DC to 5 MHz; max. 400 V (DC + peak AC) or 800 V_p-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 V_AC, 48–440 Hz, ≤70 W (80 VA)
Features	Alternate magnification P-P auto triggering HF/LF Reject trigger filters X-Y mode (± 3° from DC to 150 kHz) Calibrator (0.5 V ±5% into 1 MΩ Load; 1 kHz ±20%)

See also 2225/Options and Accessories.

Prices

Year	Catalog price	In 2026 dollars
1990	$1,095	~$2,800

Wireless World, May 1991: 2225, £400; 2225ST, £550

Links

Documents referencing 2225

Document	Class	Title	Authors	Year	Links
061-4124-02.pdf	Article	Handheld and benchtop instruments service manuals		2002	2211 • 2214 • 2220 • 2221A • 2225 • 2230 • 2232 • 2235 • 2245 • 2245A • 2246A • 2247A • 2252 • 2335 • 2336 • 2336YA • 2337 • TAS455 • TAS465 • TAS475 • TAS485 • TDS210 • TDS220 • TDS310 • TDS320 • TDS340 • TDS340A • TDS360 • TDS350 • TDS380 • THM420 • THM500 • THS710 • THS720 • THS730

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.