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DPScope - Low-Cost USB Oscilloscopes
DPScope Specifications
Feature
DPScope
   
Number of channels
2
Analog bandwidth
> 1 MHz
Input impedance
1 MOhm || 15 pF
Probe connection
BNC
Usable probe types
Standard 1:1, 1:10, 1:100 probes
Vertical sensitivity
5 mV/div to 1 V/div (1:1 probe)
50 mV/div to 10 V/div (1:10 probe)
500 mV/div to 100 V/div (1:100 probe)
(20 divisions)
Vertical resolution
8 bits (scope mode)
10 bits (datalogger mode)
Vertical offset
0 - 20 divisions
(0 - 12 divisions at 1V/div)
Maximum voltage range
-12V ... 20V (1:1 probe)
-120V ... +200V (1:10 probe) (*)
Probe compensation
yes (2 kHz calibration output)
Offset adjustment
yes
   
Max. sample rate (single shot)
1 MSample/sec
Max. sample rate (repetitive signals)
20 MSamples/sec
Timebase settings (scope mode)
0.5 usec/div ... 1 sec/div
Timebase settings (datalogger/roll mode)
0.5 sec/div ... 1 hr/div
Trigger source
CH1, CH2, auto (free run)
Trigger polarity
rising edge, falling edge
Trigger noise reject
yes (selectable)
Pre-trigger capability (i.e. can show what happened
before the trigger event)
0 - 20 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)
200 points/channel
Record length (FFT mode)
400 points/channel
Max. screen refresh rate
up to 40+ frames/sec (both channels on)
(sufficiently fast PC required)
   
Datalogger mode (roll mode)
yes (data can be logged to file in real time)
Real-time FFT
yes
FFT filters
Rectangular, Hanning,
Hamming, Blackman
Averaging
yes (1 / 2 / 5 / 10 / 20 / 50 / 100)
X-Y mode
yes
Display styles (can be combined)
Points, Vectors (Lines), Infinite Persistence
Fully automated measurements
Level: low, high, mid level, amplitude,
DC average, AC RMS
Time: period, frequency, duty cycle, pos. width,
neg. width, rise time, fall time
Waveform cursors
yes (horizontal and vertical pairs)
Waveform export (e.g. to Excel)
yes (CSV format)
Save/restore of scope setups
yes
   
PC connection
USB, 500 kbaud
PC software
Windows 2000, XP (SP3), Vista, 7
Minimum screen size
800 x 600 pixel
Power supply
through USB (5V / 250mA)
(external supply 7.5 - 9V / 300mA optional)
Approx. size (in enclosure)
4.5" x 2.6" x 1.2"
114 mm x 66 mm x 31 mm
   
Component count
~50
Solder connections to make
~200
Required skill level for assembly
moderate; only through-hole components and DIP
packages (no surface mount or fine pitch parts)
Printed circuit board
Professional printed circuit board with
corrosion-resistant, gold-plated pads and
contacts (not cheap solder finish), with silkscreen
to denote component locations.
Enclosure
Sturdy ABS plastic enclosure with custom
glass-fiber front- and back-panel, silkscreen. All
holes pre-drilled - no drilling required.
Microcontroller and USB interface
Fully pre-programmed; no programming required
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(*) Disclaimer: The DPScope is not intended for high voltage applications. Use proper precautions when
working with high voltages (anything exceeding 24V peak). Yo
u 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.