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The '''Tektronix 2221''' is a 60 MHz portable scope, sister model of [[2220]] and [[2230]].
{{Oscilloscope Sidebar
|manufacturer=Tektronix  
|series=2200-series scopes
|model=2221  
|summary=60 (100) MHz portable DSO
|image=Tek 2221 front.JPG
|caption=Tektronix 2221
|introduced=1988
|discontinued=1990
|designers=
|manuals=
* [[Media:070-6531-00.pdf|Tektronix 2221 Service Manual]]
* [[Media:070-6530-00.pdf|Tektronix 2221 Operators Manual]] (OCR)


[[List_of_manuals_that_are_needed|Manual needed]].
<small>
'''Modifications '''
* [http://hakanh.com/dl/docs/kitinstructions/040-1344-00.pdf 040-1344-00 CRT Noise Reduction] (1991)


* [http://w140.com/tek_2230_2221_2220_desc.pdf Tektronix 2230/2221/2220 Description (PDF)]
'''Other'''
* [http://w140.com/tek_2221a_user_manual.pdf Tektronix 2221A User Manual (PDF)]
* [[Media:2230_2221_2220.pdf|Tektronix 2230/2221/2220 Description]] (bad-OCR)
</small>
{{ROM Images}}


}}
The '''Tektronix 2221''' is a portable, 60 MHz, 20 MS/s combination analog / digital storage scope, sister model of [[2220]] and [[2230]].  It was [[introduced in 1988]].
The updated model '''[[2221A]]''' (1991) increased bandwidth to 100 MHz and 100 MS/s.
The recommended cart is the [[K212]].
{{BeginSpecs}}
{{Spec | Analog bandwidth | 60 MHz (50 MHz in 2 mV/Div range), 10 MHz limit switchable }}
{{Spec | Rise time (analog mode) | 5.8 ns (7 ns in 2 mV/Div range) }}
{{Spec | Sampling rate | 20 MS/s single channel, 10 MS/s in ALT or CHOP }}
{{Spec | Memory depth  | 4 K samples single channel, 2 K per channel in ALT or CHOP }}
{{Spec | Resolution | 8 bits }}
{{Spec | Deflection | 2 mV/Div to 5 V/Div, 1-2-5 }}
{{Spec | Glitch capture | > 100 ns}}
{{Spec | CRT | 8 x 10 cm, P31 phosphor, 14 kV acceleration }}
{{Spec | Outputs | analog X/Y plotter output, 500 mV/Div, pen lift relay contact }}
{{Spec | Power | 90-250 V, 85 W, fan-cooled }}
{{Spec | Weight | 8.2 kg (18 lb.) }}
{{Spec | Features |
* Reference waveform memory
* Cursors and readout
* Signal averaging
* TV line and field trigger
* Variable holdoff
}}
{{Spec | Options |
* Opt.10 – GPIB (board 671-0304-00)
* Opt.12 – RS232 (board 671-0303-00)
}}
{{EndSpecs}}
==Links==
* [http://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf Troubleshooting tips on 2200 PSU]
* [https://www.youtube.com/watch?v=n9qFlJmcxqo Tektronix 2230 Family Marketing Presentation] @ YouTube courtesy of the [https://vintagetek.org Vintage Tek Museum]
{{Documents|Link=2221}}
{{PatentLinks|2221}}
==Internals==
The 2221 is controlled by an [[Intel 8088]] microprocessor with firmware in a pair of 27512 EPROMs, and six TMS4426 16K×4 DRAMs. 
The A/D converter is a [[156-2248-00|Sony CX20052A]] (8 bit, 20 MHz, ECL output).  A pair of MCM2016H 2K×8, 70 ns RAMs serve as acquisition memory.
Custom Tek chips used include [[155-0274-00]] (A1U130, A1U180), [[155-0273-00]] (A2U30, A2U80), and [[155-0022-00]] (A10U2101).  There is also a semi-custom part (A10U9208 Display Controller, 156-2452-00).
==Pictures==
<gallery>
<gallery>
Image:Tek 2221 front.JPG
Tek 2221 front.JPG
Image:Tek 2221 front2.JPG
Tek 2221 front2.JPG
Image:Tek 2221 side.JPG
Tek 2221 side.JPG
Image:Tek 2221 rear.JPG
Tek 2221 rear.JPG
Image:Tek 2221 io.JPG
Tek 2221 io.JPG
Image:Tek 2221 ioclose.JPG
Tek 2221 ioclose.JPG
</gallery>
</gallery>


[[Category:2000 series scopes]]
==Components==
[[Category:Manual needed]]
{{Parts|2221}}
[[Category:Specifications needed]]
 
[[Category:Description needed]]
[[Category:2200 series scopes]]
[[Category:Digital storage scopes]]

Latest revision as of 07:49, 19 August 2024

Tektronix 2221
60 (100) MHz portable DSO
Tektronix 2221

Produced from 1988 to 1990

Manuals
ROM Images
File Pos. Checksum
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Tektronix 2221 is a portable, 60 MHz, 20 MS/s combination analog / digital storage scope, sister model of 2220 and 2230. It was introduced in 1988. The updated model 2221A (1991) increased bandwidth to 100 MHz and 100 MS/s.

The recommended cart is the K212.

Key Specifications

Analog bandwidth 60 MHz (50 MHz in 2 mV/Div range), 10 MHz limit switchable
Rise time (analog mode) 5.8 ns (7 ns in 2 mV/Div range)
Sampling rate 20 MS/s single channel, 10 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
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

Documents Referencing 2221

(no results)

Internals

The 2221 is controlled by an Intel 8088 microprocessor with firmware in a pair of 27512 EPROMs, and six TMS4426 16K×4 DRAMs. The A/D converter is a Sony CX20052A (8 bit, 20 MHz, ECL output). A pair of MCM2016H 2K×8, 70 ns RAMs serve as acquisition memory.

Custom Tek chips used include 155-0274-00 (A1U130, A1U180), 155-0273-00 (A2U30, A2U80), and 155-0022-00 (A10U2101). There is also a semi-custom part (A10U9208 Display Controller, 156-2452-00).

Pictures

Components

Some Parts Used in the 2221

Part Part Number(s) Class Description Used in
155-0022-00 155-0022-00 • 155-0022-01 Monolithic integrated circuit analog multiplexer 147 • 148 • 149 • 335 • 468 • 1430 • 1441 • 1461 • 1900 • 1910 • 2220 • 2221 • 2230 • 5223 • 5403 • 5440 • 5441 • 5443 • 5444 • 5A38 • 7313 • 7403N • 7503 • 7504 • 7514 • 7603 • AN/USM-281C • 7613 • 7623 • 7623A • 7633 • 7704 • R7704 • 7704A • 7834 • 7844 • 7854 • R7912 • 7912AD • 7912HB • 7904 • R7903 • 7904A • 7934 • 7A12 • 7A18 • 7A18A • 7A18N • 7B52 • 7B53N • 7D10 • 7D11 • 7D12 • NT-7000 • P7001
155-0124-00 155-0124-00 Monolithic integrated circuit horizontal preamplifier 455 • SC503 • SC504 • 2221 • 2230 • 2232 • 2336 • 2337
155-0273-00 155-0273-00 Monolithic integrated circuit broadband vertical amplifier 2220 • 2221 • 2230 • 2232
155-0274-00 155-0274-00 Monolithic integrated circuit broadband vertical amplifier 2220 • 2221 • 2230
234-0107-20 234-0107-20 Monolithic integrated circuit trigger 2221 • 2230 • 2232
Intel 8086 Monolithic integrated circuit 16-bit microprocessor 1240 • 2220 • 2221 • 2230 • 2246 • 2232 • 2245A • 2782 • 4114 • 4115
T4655 154-0861-00 • 154-0861-10 • 154-0930-00 CRT CRT 2220 • 2221 • 2221A • 2230 • 2232
TMS9914 156-1444-00 • 156-1444-01 Monolithic integrated circuit GPIB controller 11301 • 11301A • 11302 • 11302A • 2221 • 2230 • 2424L • 2440 • 4052A • 4054A • 021-0374-00 • 067-1137-99 • AM700 • DC5009 • DC5010 • DM5010 • DM5110 • DM5120 • DM5520 • FG5010 • MI5010 • SG5010 • SG5030 • SI5010 • PS5004 • PS5010 • Keithley 182 • Keithley 193A • Keithley 195 • Keithley 195A • Keithley 196 • Keithley 197 • Keithley 199 • Keithley 220 • Keithley 224 • Keithley 230 • Keithley 263 • Keithley 617
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