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|caption=Tektronix 2221 | |caption=Tektronix 2221 | ||
|introduced=1988 | |introduced=1988 | ||
|discontinued= | |discontinued=1990 | ||
|designers= | |designers= | ||
|manuals= | |manuals= | ||
* [[Media:070-6531-00.pdf|Tektronix 2221 Service Manual]] | |||
* [[Media:070-6530-00.pdf|Tektronix 2221 Operators Manual]] (OCR) | |||
* [[Media:070-6531-00.pdf|Tektronix 2221 Service Manual | |||
* [[Media:070-6530-00.pdf|Tektronix 2221 Operators Manual ( | |||
<small> | <small> | ||
'''Modifications ''' | '''Modifications ''' | ||
* [http://hakanh.com/dl/docs/kitinstructions/040-1344-00.pdf 040-1344-00 CRT Noise Reduction] (1991) | * [http://hakanh.com/dl/docs/kitinstructions/040-1344-00.pdf 040-1344-00 CRT Noise Reduction] (1991) | ||
'''Other''' | |||
* [[Media:2230_2221_2220.pdf|Tektronix 2230/2221/2220 Description]] (bad-OCR) | |||
</small> | </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]]. | 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''' increased bandwidth to 100 MHz and 100 MS/s. | The updated model '''[[2221A]]''' (1991) increased bandwidth to 100 MHz and 100 MS/s. | ||
Recommended cart is the [[K212]]. | Recommended cart is the [[K212]]. | ||
{{BeginSpecs}} | {{BeginSpecs}} | ||
{{Spec | Analog bandwidth | 60 MHz (50 MHz in 2 mV/Div range), 10 MHz limit switchable }} | {{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 | 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 | 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 | Memory depth | 4 K samples single channel, 2 K per channel in ALT or CHOP }} | ||
{{Spec | Resolution | 8 bits }} | {{Spec | Resolution | 8 bits }} | ||
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* TV line and field trigger | * TV line and field trigger | ||
* Variable holdoff | * Variable holdoff | ||
* GPIB | }} | ||
{{Spec | Options | | |||
* Opt.10 – GPIB (board 671-0304-00) | |||
* Opt.12 – RS232 (board 671-0303-00) | |||
}} | }} | ||
{{EndSpecs}} | {{EndSpecs}} | ||
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==Links== | ==Links== | ||
* [http://www.hakanh.com/dl/docs/troubleshooting_tips_on_2200_ps.pdf Troubleshooting tips on 2200 PSU] | * [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] | |||
==Internals== | ==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). | 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). | ||
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</gallery> | </gallery> | ||
{{ | ==Components== | ||
{{Parts|2221}} | |||
[[Category:2200 series scopes]] | [[Category:2200 series scopes]] | ||
[[Category:Digital storage scopes]] | [[Category:Digital storage scopes]] | ||