2221A

Tektronix 2221A

100 MHz portable DSO

Produced from 1991 to (?)

Manuals

Modifications

040-1344-00 CRT Noise Reduction (1991)

Other

Tektronix 2230/2221/2220 Description

ROM/PLD Images

File	Pos.	Checksum
160-6188-04.bin	U9120	15fca141
160-6188-05.bin	U9120	a38ef52a
160-6188-06.bin	U9120	6adb2e6d
160-6188-07.bin	U9120	c3925d83
160-6192-04.bin	U9121	fa0c5bd4
160-6192-05.bin	U9121	353bec36
160-6192-06.bin	U9121	5430cb6a
160-6192-07.bin	U9121	66044407

A10U9120 160-6188-04 B??? B???
A10U9120 160-6188-05 B??? B???
A10U9120 160-6188-06 B??? B???
A10U9120 160-6188-07 B??? B???
 
A10U9121 160-6192-04 B??? B???
A10U9121 160-6192-05 B??? B???
A10U9121 160-6192-06 B??? B???
A10U9121 160-6192-07 B??? B???
 
A10U9115 160-5809-00 PAL
 
A10U9211 160-5810-00 PAL

(Manuals are OCRed PDF files unless noted otherwise)

Manuals – Specifications – Links – Pictures

The Tektronix 2221A is a portable, 100 MHz, 100 MS/s combination analog / digital storage scope, an update of the slower 2221.

Recommended cart is the K212.

Key Specifications

Analog bandwidth	100 MHz (80 MHz in 2 mV/Div range), 20 MHz limit switchable
Rise time (analog mode)	3.5 ns (4.4 ns in 2 mV/Div range)
Sampling rate	100 MS/s single channel, 50 MS/s in ALT or CHOP
Memory depth	4 K samples single channel, 2 K per channel in ALT or CHOP
Resolution	8 bits
Deflection	2 mV/Div to 5 V/Div, 1-2-5
Glitch capture	> 100 ns
Probes	Two P6109B 10X, Probes
CRT	8 x 10 cm, P31 phosphor, 14 kV acceleration
Outputs	analog X/Y plotter output, 500 mV/Div, pen lift relay contact
Power	90-250 V, 85 W, fan-cooled
Weight	8.2 kg (18 lb.)
Features	Reference waveform memory Cursors and readout Signal averaging TV line and field trigger Variable holdoff
Options	Opt.10 – GPIB (board 671-0304-00) Opt.12 – RS232 (board 671-0303-00)

Links

Troubleshooting tips on 2200 PSU
Tektronix 2230 Family Marketing Presentation @ YouTube courtesy of the Vintage Tek Museum

Documents Referencing 2221A

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

Pictures

Components

Some Parts Used in the 2221A

Part	Part Number(s)	Class	Description	Used in
155-0273-00	155-0273-00	Monolithic integrated circuit	broadband vertical amplifier	2220 • 2221 • 2221A • 2224 • 2230 • 2232
234-0107-20	234-0107-20	Monolithic integrated circuit	trigger	2220 • 2221 • 2221A • 2224 • 2230 • 2232
27010		Monolithic integrated circuit	128K×8 EPROM	2221A • 2224 • 2710
T4655	154-0861-00 • 154-0861-10 • 154-0930-00	CRT	CRT	2220 • 2221 • 2221A • 2224 • 2230 • 2232 • 2235