2221

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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.

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

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 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 2221 2230 2424L 2440 4052A 4054A 021-0374-00 067-1137-99 DC5009 DC5010 DM5010 DM5120 DM5520 MI5010 SG5010 SG5030 SI5010 PS5004 PS5010 Keithley 193A Keithley 195A Keithley 196 Keithley 197 Keithley 199 Keithley 220 Keithley 230