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The Tektronix 2247A is a 100 MHz four-channel analog oscilloscope with a built-in 200 MHz counter/timer. (It is unknown if a 2247 non-A model was ever built.)

The 2247A is part of a nearly identical family consisting of the 2245, 2246, 2247A, and 2252.

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

The 2247A has advanced features like automatic setup, tracking cursors, integrated voltmeter and counter/timer functions, and store/recall of 20 front panel setups.


Bandwidth 100 MHz
Deflection CH 1,2: 2 mV/div to 5 V/div; CH 3,4: 0.1 V/div and 0.5 V/div, all ±2%
Vertical Operating Modes CH1,2,3,4, CH2 Invert, Add, Alt, Chop (625 kHz)
Input Impedance 1 MΩ // 20 pF
Sweep Speeds A Time Base: 0.5 s/div to 20 ns/div; B Time Base: 5 ms/div to 20 ns/div (×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
Counter/Timer Freq, Period, Width, Totalize, Freq Ratio, Sec, 1/Sec, Phase, Rise/Fall Time, Prop Delay Time
Cursors Time, 1/Time, Delta Time, 1/Delta Time, Delta Phase, Volts
Interface Centronics (2252) Printers: Epson FX-Series (9- or 24-pin)
Probes Two P6109 100 MHz ×10 probes, BNC connector with a readout pin
Power 100 W max, 90 − 250 VAC, 48 − 445 Hz