2440

The Tektronix 2440 is a two-channel 300 MHz, 500 MS/s digital sampling oscilloscope from the late 1980s.

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300 MHz, 500 MS/s 2-ch digital scope Tektronix 2440 Produced from 1988 to (?) Manuals Tektronix 2440 Manual (complete, B014064 and below) (PDF, OCR) Tektronix 2440 Programmer Manual (PDF, OCR) Tektronix 2440 Manual (without schematics) (PDF) 2430A/2432A/2440 catalog page (PDF, OCR) (All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

It uses CCDs (essentially, analog shift registers) to store input samples at high speed and a single 8 bit flash A/D converter to digitize the time-multiplexed CCD output signals at 4 MS/s.

WARNING:
Operation of the 2440 (and 2432 and 2430): A/D-converter and CCD hybrids may suffer irreparable damage within a few minutes if operated out of the metal enclosure without extra cooling.

Key Specifications

Bandwidth	300 MHz (Limit: 20, 100, Full)
Sampling rate	500 MSa/s each channel with simultaneous acquisition
Deflection	2 mV/div to 5 V/div in 1-2-5 sequence
Auto Scale Factor	On-Screen Readout indicates probe tip deflection factors for ×1, ×10, ×100 and ×1000 probes
Input Impedance	1 MΩ // 15 pF
Sweep Speeds	2 ns/div to 5 s/div in 1-2-5 sequence (Modes A, A Intensified and B)
Auto Measure	Simultaneously measures up to four parameters on one or more displayed waveforms, updated at 3 Hz intervals or display a snapshot of 20 parameters of waveform target
Acquisition Modes	Normal, Envelope (glitch capture), Average
Display Modes	CH1, CH2, invert, add, multiply, X-Y
Cursors	Volts, Time, Volts At Time, 1/Time, Slope
Functions	A Mode - Auto Level, Auto/Roll, Normal and Single Seq; B Mode - Trigger After Delay, Runs After Delay, 1K Record Length and more
Interface	GPIB
Probes	Two passive P6137 400 MHz ×10 voltage probes, 1.3 m
Power	90 to 132 V_AC or 80 to 250 V_AC, 48 to 440 Hz; 160 W
Features	Autoprobe Function With P6137 Probe 300 MHz X-Y bandwidth at probe tip Automatic measurements extensive triggering capabilities Printer/Plotter Output On-screen HELP text describing every front-panel control
Options	03 - Word Recognizer (P6407) 05 - Video Waveform Measurement System 11 - Two probe-power connectors on the rear panel

Links

Tektronix 2440 internals & repair @ hohlerde.org

Internals

The 2440 employs several processors − an MC68B09 main CPU controls the instrument, a custom 16-bit waveform processor performs signal computations, and an MC6805 microcontroller handles the front panel interface. The GPIB Interface is implemented with a TMS9914 controller.

The power supply consists of a buck-type pre-regulator followed by a push-pull inverter and linear post-regulators (except for the +5 V digital supply rail).

CRT is a 154-0850-01.