2440

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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

Channels 2
Resolution 8 bit
Record length 1024 samples
Bandwidth 300 MHz (Limit: 20, 100, Full)
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
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 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

Links

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