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.
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.
|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|
|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|
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.