2246

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The Tektronix 2246 is a 100 MHz four-channel analog oscilloscope introduced in 1987. It was updated to the 2246A in 1988.

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

The 2246 includes many of the same features of the 2245A and adds auto-tracking SmartCursors which track the selected measurement, trigger level, or ground. There are Labeled Volts Cursors with Ground-Referenced Readings and On-Screen Readouts; Hands-Off Voltmeter Measurements of DC Volts, +Peak and -Peak Volts, and P-P Volts; SmartCursors Integrate Voltage, Time, Frequency, and Phase Measurements, and are available in ALT and B Horizontal Modes.

The input buffer amplifier in the 2246A is the 165-2232-00.

Key Specifications

Bandwidth	100 MHz
Deflection	CH 1, CH 2: 2 mV/div to 5 V/div (1–2–5); CH 3, CH 4: 0.1 V/div and 0.5 V/div, all ±2%; BW Limit: 20 MHz ±15%
Vertical Operating Modes	CH1,2,3,4, CH2 Invert, Add, Alt, Chop (625 kHz)
Input Impedance	1 MΩ ±1.0% // 20 pF ±1 pF
Maximum Input Voltage	400 V (DC + peak AC) or 800 V (p-p ac at ≤ 10 kHz)
Sweep Speeds	A Time Base: 0.5 s/div to 20 ns/div (1–2–5); B Time Base: 5 ms/div to 20 ns/div (1–2–5, ×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)
Trigger Source A & B	Vert, CH1, 2, 3, 4, Line
Voltmeter	DC, +Peak, −Peak, PK-PK, Gated Volts, Smart Tracking Cursors: Volts, GND, Trigger Lvl
Cursors	Time, 1/Time, Delta Time, 1/Delta Time, Delta Phase, Volts
Interface	Ext Counter/Timer Base Input connector; Ext Z-Axis Input connector
Probes	Two P6109 100 MHz ×10 probes, BNC connector with a readout pin
Power	90 − 250 VAC, 48 − 445 Hz, 100 W max.

Models

• 2246
• 2246 1Y
• 2246 2R
• 2246 Mod A
• 2246A

Links

• See Also 067-0557-00

Pictures

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  2246A

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Components

Some Parts Used in the 2246

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
165-2154-00	165-2154-00	Hybrid integrated circuit	buffer amplifier	2246
234-0203-20	234-0133-20 • 234-0203-20 • 234-0238-20	Monolithic integrated circuit	amplifier	2245A • 2246
234-0401-20	234-0401-20 • 234-0401-21	Monolithic integrated circuit	horizontal preamplifier	2245A • 2246
Intel 8086		Monolithic integrated circuit	16-bit microprocessor	1240 • 2220 • 2221 • 2230 • 2246 • 2232 • 2245A • 4114 • 4115
M376-004	234-0204-20 • 234-0239-30 • 234-0239-31	Monolithic integrated circuit	trigger	2245A • 2246
T4656	154-0905-00	CRT	CRT	2245A • 2246 • 2246A

Some Parts Used in the 2246A

Part	Part Number(s)	Class	Description	Used in
T4656	154-0905-00	CRT	CRT	2245A • 2246 • 2246A