2440

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 (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 VAC or 80 to 250 VAC, 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

• 
• 
• 
• 
• 
• 
• 
• 

CRTs used in the 2440

Custom ICs used in the 2440

Page	Model	Part nos	Description	Designers	Used in
155-0242-00	155-0242-xx	155-0242-00 • 155-0242-01	Z-axis amplifier and autofocus	Mike Metcalf	2215 • 2252 • 2440 • 2445 • 2445B • 2465 • 2465B • 2467 • 2467B
155-0294-00	155-0294-0x	155-0294-00 • 155-0294-01	Z-axis amplifier		2424L • 2440
165-2273-00	165-2273-00	165-2273-00	peak detector		2432 • 2432A • 2440