2440

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Tektronix 2440

300 MHz, 500 MS/s 2-ch digital scope

Produced from 1988 to (?)

Manuals

(All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

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

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, 2432, 2432A, 2430, and 2430A: 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)
Rise time	1.2 ns (Repeat on, 16×averaging)
Sampling rate	500 MSa/s each channel with simultaneous acquisition
Sampling type	Real time: 100 ns/Div and slower, Equivalent time 50 ns/Div and faster
Single event bandwidth	200 MHz
Deflection	2 mV/div to 5 V/div in 1-2-5 sequence
Resolution	8 bit
Record length	1024 samples
Auto scale factor	On-Screen Readout indicates probe tip deflection factors for ×1, ×10, ×100 and ×1000 probes
Input impedance	1 MΩ // 15 pF or 50Ω
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.

Pictures

Components

Some Parts Used in the 2440

Part	Part Number(s)	Class	Description	Used in
148-0140-00	148-0140-00	Discrete component	miniature bi-stable relay actuator	2424L • 2430 • 2431L • 2432 • 2439 • 2440 • 119-1445-02
154-0850-01	154-0850-00 • 154-0850-01	CRT	CRT	2424L • 2430 • 2430A • 2431L • 2432 • 2439 • 2440 • 2445 • 2465 • 2465A • 2465B
155-0242-00	155-0242-00 • 155-0242-01	Hybrid integrated circuit	Z-axis amplifier and autofocus	2215 • 2252 • 2440 • 2445 • 2445B • 2465 • 2465B • 2467B
155-0294-00	155-0294-00 • 155-0294-01	Monolithic integrated circuit	Z-axis amplifier	2424L • 2440
165-2273-00	165-2273-00	Hybrid integrated circuit	peak detector	2432 • 2432A • 2440
Motorola 6809	156-1494-00 • 156-1494-01	Monolithic integrated circuit	8-bit microprocessor	2424L • 2440 • 7D20 • DM5120 • DM5520
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