DPO4000B Series DPO Scopes
A Quick Overview

Trigger System

Main Trigger Modes – Auto, Normal and Single.

Trigger Coupling – DC, HF reject (attenuates>50 kHz), LF reject (attenuates <50 kHz),
noise reject (reduces sensitivity).

Trigger Holdoff Range – 2 ns to 8 s.

Sensitivity

Internal DC Coupled – 0.35 div DC to 50 MHz increasing to 1 div at rated bandwidth

External (auxiliary input) –200 mV from DC to 50 MHz increasing to 500 mV at 300 MHz.

Trigger Level Range

Any Channel – ±8 divisions from center of screen.

External (auxiliary input) – ±8 V.

Acquisition Modes

Sample – Acquire sampled values.

Peak Detect – Captures narrow glitches at all real- time sampling rates.

Averaging – From 2 to 128 waveforms included in average.

Envelope – Min-max envelope reflecting Peak Detect data over multiple acquisitions.

Hi-Res – Real-time boxcar averaging reduces random noise and increases resolution.

Roll – Scrolls waveforms right to left across screen at sweep speeds slower than or equal to 40 ms/div

Trigger Modes

Edge – Positive or negative slope on any channel or front panel auxiliary input. 

Coupling includes DC, HF reject, LF reject and noise reject.

Pulse Width – Trigger on width of positive or nega- tive pulse that are >,<, = or ≠ a specified period of time.

Runt – Trigger on a pulse that crosses one threshold but fails to cross a second threshold before crossing the first again.

Logic – Trigger when any logical pattern of channels goes false or stays true for specified period of time.
 Any input can be used as a clock to look for the pattern on a clock edge.

Pattern (AND, OR, NAND, NOR) specified for four input channels defined as High, Low or Don’t Care.

Setup and Hold – Trigger on violations of both setup time and hold time between clock and data present on any two input channels.

 Rise/Fall Time – Trigger on pulse edge rates that are faster or slower than specified. Slope may be positive, negative or either.

 Video – Trigger on all lines, odd, even or all fields on NTSC, PAL and SECAM video signals.

Trigger Delay by Time – 2 ns to 8 s.

Trigger Delay by Events – 1 to 9,999,999 events.

I2C (Optional) – Trigger on Start, Repeated Start,I Stop, Missing ACK, Address (7 or 10 bit),
Data or on I2C buses up to 3.4 Mb/s. Address and Data

SPI (Optional) – Trigger on SS, MOSI, MISO or MOSI and MISO on SPI buses
up to 10.0 Mb/s (4 channel models only).

 CAN (Optional) – Trigger on Start of Frame, Frame Type (data, remote, error, overload), Identifier (standard or extended), Data, Identifier and Data, End of Frame or Missing ACK on CAN signals up to 1 Mb/s. Data can be further specified to trigger on ≤,<,=, >, ≥ or ≠ a specific data value. User adjustable sample point is set to 80% by default.

Waveform Measurements

Cursors – Waveform and Screen.

 Automatic Measurements – 25, of which up to 4 can be displayed on screen at any one time.
Measurements include Period, Frequency, Delay, Rise Time, Fall Time, Positive Duty Cycle, Negative Duty Cycle,
Positive Pulse Width, Negative Pulse Width, Burst Width, Phase, Positive Overshoot, Negative Overshoot,
Peak to Peak, Amplitude, High, Low, Max, Min, Mean, Cycle Mean, RMS, Cycle RMS, Area and Cycle Area.
Measurement Statistics – Mean, Min, Max, Standard Deviation.

 Reference Levels – User definable reference levels for automatic measurements may be specified in either percent or units.

Gating – Isolate the specific occurrence within an acquisition to take measurements on, using either the screen or waveform cursors

Waveform Math

Arithmetic – Add, subtract, multiply and divide waveforms.

Math Functions – Integrate, Differentiate, FFT.

FFT – Spectral magnitude. Set FFT Vertical Scale to Linear RMS or dBV RMS,
and FFT Window to  Rectangular, Hamming, Hanning or Blackman-Harris.

Advanced Math – Define extensive algebraic expressions including waveforms, math functions, scalars, up to two
user-adjustable variables, and results of parametric measurements e.g. (Intg(Ch1- Mean(Ch1)) x 1.414 x VAR1).

Software

National Instruments SignalExpress Tektronix Edition –

A fully interactive measurement software environment optimized for the DPO4000 Series

enables