DPScope - Low-Cost PC-Based USB Oscilloscopes

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DPScope - Low-Cost USB Oscilloscopes

(*) Disclaimer: The DPScope II is not intended for high voltage applications. Use proper precautions when
working with high voltages (anything exceeding 24V peak). You do so at your own risk and we cannot be held
responsible for damage to life or property resulting from such work. Attempt such work ONLY if you have the
necessary knowledge and training. Make sure the probe is set up to the required division ratio before probing.
Never apply any voltage exceeding 24V to the oscilloscope inputs. Note that the peak value of an sinusoidal AC
signal is approx. 40% higher than its rated effective value.

DPScope II Specifications

Feature

DPScope II

Analog frontend:

Number of channels

Analog bandwidth

~ 2.5 MHz

Input impedance

1 MOhm || 20 pF

Input coupling

AC coupled, DC coupled

Probe connection

Standard BNC

Usable probe types

Standard 1:1, 1:10 probes

Vertical sensitivity

10 mV/div to 1 V/div (1:1 probe)
100 mV/div to 10 V/div (1:10 probe)
(20 vertical divisions)

Vertical resolution

8 bits (scope mode)
10 bits (datalogger mode)

Vertical center offset

-10 ... +10 divisions

Maximum voltage range

-20V ... 20V (1:1 probe)
-200V ... +200V (1:10 probe) (*)

Probe compensation

yes (2 kHz / 3.3V calibration output)

Gain & Offset compensation

yes, automated software procedure

Digital & Timing:

Max. sample rate (scope mode, single shot)

2 MSa/sec

Max. sample rate (scope mode, repetitive signals)

50 MSa/sec

Max. sample rate (datalogger mode)

1 kSa/sec
(direct streaming to hard drive possible)

Timebase settings (scope mode)

0.2 usec/div ... 1 sec/div

Timebase settings (datalogger/roll mode)

10 msec/div ... 1 hr/div

Trigger source

CH1, CH2, auto (free run)

Trigger polarity

rising edge, falling edge, both rising and falling

Trigger noise reject

yes (selectable)

Maximum trigger frequency

~ 1 MHz

Pre-trigger capability (i.e. can show what happened
before the trigger event)

0 - 80 divisions

Post-trigger delay (delayed scan, to look at the
signal long after the trigger event but with high
resolution)

0 - 200 divisions

Record length (normal mode)

800 points/channel

Record length (FFT mode)

1024 points/channel

Record length (datalogger mode)

practically unlimited (data can be logged to file on
harddrive in real time)

Max. screen refresh rate

up to 40+ frames/sec (both channels on)
(sufficiently fast PC required)

Signal Output:

Signal generator

300 Hz ... 2 MHz (square wave, 3.3V pk-pk)

Math & Measurements:

Real-time FFT

yes

FFT filters

Rectangular, Hanning,
Hamming, Blackman

Averaging

yes (1 / 2 / 5 / 10 / 20 / 50 / 100)

FFT Averaging Methods

magnitude, vector

X-Y mode

yes

Display styles (can be combined)

Points, Vectors (Lines), Infinite Persistence

Fully automated waveform measurements

Level: low, high, mid level, amplitude,
DC average, AC RMS
Time: period, frequency, duty cycle, pos. width,
neg. width, rise time, fall time

Spectrum/distortion measurements

Frequencies of fundamental and harmonics
THD, THD+N, noise

Waveform cursors

yes (horizontal and vertical pairs)

Waveform export (e.g. to Excel)

yes (CSV format)

Save/restore of scope setups

yes

General:

PC connection

USB, 1 Mbaud

PC software

Windows XP (SP3), Vista, 7, 8

Minimum screen size

1024 x 768 pixel

Power supply

through USB (5V / ~100 mA)

Approx. size (in enclosure)

4.5" x 2.6" x 1.2"
114 mm x 66 mm x 31 mm