2245

Manuals – Specifications – Links – Pictures

The Tektronix 2245 is a 100 MHz four-channel analog oscilloscope, introduced in 1987 (2245A in 1988).

Channels 1 and 2 are full-featured, whereas 3 and 4 are limited in both deflection factor and coupling, as they are intended mainly for digital and trigger signals.

The 2245 includes features like AUTO SETUP which automatically adjusts vertical, horizontal, triggering and display controls to provide a stable, triggered display of the waveform in seconds. It offers a dual time base with delayed sweep, and cursor time/voltage measurements with on-screen readout of cursor data and scale factors.

Key Specifications

Bandwidth	100 MHz
Deflection	CH 1, CH 2: 2 mV/div to 5 V/div in 1-2-5 seq; CH 3, CH 4: 0.1 V/div and 0.5 V/div, all ±2%; BW limit: 20 MHz ±15%
Vertical modes	CH1,2,3,4, CH2 Invert, Add, Alt, Chop (625 kHz)
Input impedance	1 MΩ ±1.0% // 20 pF ±1 pF
Maximum input	400 V DC + peak AC, or 800 Vp-p at ≤ 10 kHz)
Sweep	A Time Base: 0.5 s/div to 20 ns/div in 1-2-5 seq; B Time Base: 5 ms/div to 20 ns/div in 1-2-5 seq (×10 magnifier to 2 ns/div)
Trigger	DC, Noise Reject, HF Reject, LF Reject, AC, TV Line, TV Field
Trigger modes	A Mode: Auto Level, Auto, Norm, TV Line, TV Field, Single Seq. B Mode: Runs After Delay, Auto Level, Norm, TV Line (From A Source)
Cursors	Time, Volts
Interface	Ext Counter/Timer Base Input connector; Ext Z-Axis Input connector
CRT	Acceleration 16.4 (−2.7/+13.7) kV
Power	90 − 250 VAC, 48 − 445 Hz; 100 W max.

Standard probes: Two P6109 100 MHz ×10 probes, BNC connector with a readout pin (2245) (2245A)

Repair Information

• 2245 Power Supply Repair Information

Links

Backup Battery in Tek 2245A

Documents referencing 2245

Documents referencing 2245A

Prices

2245 Year Catalog price In 2026 dollars 1987 $1,875 ~$5,500

2245A Year Catalog price In 2026 dollars 1989 $1,895 ~$5,000 1990 $1,995 ~$5,000

Pictures

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  2245

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  2245A

• 

  2245A

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  2245A

Components

Some Parts Used in the 2245

Some Parts Used in the 2245A

Part	Part Number(s)	Class	Description	Used in
155-0322-00	155-0322-00	Monolithic integrated circuit	vertical output amplifier	2245A • 2246
156-2654-00	156-2654-00	Monolithic integrated circuit	ECL "fast logic"	2245A • 2246
156-2655-00	156-2655-00	Monolithic integrated circuit	"slow logic"	2245A • 2246
165-2232-01	165-2232-01	Hybrid integrated circuit	buffer amplifier	2245A
234-0203-20	234-0133-20 • 234-0203-20 • 234-0238-20	Monolithic integrated circuit	amplifier	2224 • 2245A • 2246
234-0401-20	234-0401-20 • 234-0401-21	Monolithic integrated circuit	horizontal preamplifier	2245A • 2246 • 2247A
Intel 8086	156-1609-01 • 156-5866-00	Monolithic integrated circuit	16-bit microprocessor	1240 • 2220 • 2221 • 2224 • 2230 • 2246 • 2232 • 2245A • 2402 • 2782 • 4107 • 4113 • 4114 • 4114A • 4114B • 4115B • 4116A • 4116B • 4170 • 4205
M376-004	234-0204-20 • 234-0239-30 • 234-0239-31	Monolithic integrated circuit	trigger	2245A • 2246
M377	165-2129-03 • 165-2089-06 • 155-2089-05	Monolithic integrated circuit	amplifier	11A16 • 11A32 • 11A33 • 11A34 • 11A52 • 2245 • 2245A • 2247 • 2247A • 2252 • TDS410 • TDS420 • TDS460 • TDS520D • TDS540D • TDS580D • TDS680C • TDS684C • TDS714L • TDS724D • TDS754D • TDS784D • Preamble DA1855
Motorola 6805	156-0426-04	Monolithic integrated circuit	8-bit microprocessor	2424L • 2245A • Keithley 175 • Keithley 175A • Keithley 1753 • Keithley 197 • Keithley 263 • Keithley 485 • Keithley 4853 • Keithley 580 • Keithley 617 • TDS520
T4656	154-0905-00	CRT	CRT	2245A • 2246 • 2246A • 2247A