VT DSO-2820: PC based USB 8~16Bit 200MSPS 80MHz Oscilloscope, Spectrum Analyzer, 10-bit 6.25MSPS 150kHz AWG Signal Generator



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VT DSO-2820

PC based USB 8~16Bit 200MSPS 80MHz Oscilloscope, Spectrum Analyzer, 10-bit 6.25MSPS 150kHz AWG Signal Generator Brochure Manual

US$339.95 Free Express Shipping

Download and try the fully functional Multi-Instrument software using your sound card as the ADC and DAC device!
1. Instroduction

This is one of the second-generation USB DSO (USB Oscilloscopes) designed and developed by Virtins Technology. This generation of USB DSOs features Virtins Technology’s unique hardware-based DSP algorithm which enhances the performance and functionality dramatically without adding extra hardware cost. When used in conjunction with Multi-Instrument^® software, the USB DSO converts any desktop, laptop, or tablet PC into a powerful oscilloscope, spectrum analyzer, multimeter, data logger, signal generator and so forth, all of which work simultaneously.

2. Package Contents

1) VT DSO-2820 unit with a hardware bundled Multi-Instrument Standard software license
2) 2 × 100MHz Oscilloscope Probe P6100 with two switchable positions: × 1, × 10
3) Signal Generator Test Lead (1 m)
4) USB cable (1.5 m)
5) CD (contains the copy-protected Multi-Instrument Software and VT DSO-2820 driver)
6) Individual voltage calibration data

VT DSO-2820, PC USB Oscilloscope, Spectrum Analyzer, AWG Signal Generator

Oscilloscope: 8~16Bit, 200MHz sampling rate, 80MHz bandwidth, 12 voltage ranges

AWG Signal Generator: 10-bit, sampling rate 6.25 MHz, bandwidth 150 kHz

2 analog inputs, 1 input for external trigger or 1-bit ADC, 1 analog / digital output

Streaming mode supported, virtually unlimited storage space, elegant aluminum case

2 x 100MHz oscilloscope probes, 1 test lead for Signal Generator & a 1.5m USB cable

Touch to measure, compatible with MS Surface Pro, software & firmware upgradable

Powered by Multi-Instrument test & measurement virtual instrument software

Unique hardware based DSP algorithm, unmatchable 1% DC accuracy, re-calibratable

Sophisticated triggering, adaptive anti-aliasing filter, compact & rugged design

Virtins Technology

3. VT DSO-2820 Hardware Specifications

Oscilloscope Horizontal (Time) Axis
Real Time Sampling Frequency (fs)		Single Analog Channel 200 MHz Single or Dual Analog Channels with or without 1-bit Digital Channel 100 MHz, 50 MHz, 25 MHz, 20 MHz, 10 MHz, 5 MHz, 4 MHz, 2 MHz, 1 MHz, 500 kHz, 400 kHz, 200 kHz, 100 kHz, 50 kHz, 40 kHz, 20 kHz, 10 kHz, 5 kHz, 4 kHz, 2 kHz, 1 kHz, 500 Hz, 400 Hz, 200 Hz, 100 Hz, 50 Hz, 40 Hz, 20 Hz, 10 Hz, 5 Hz, 4 Hz, 2 Hz, 1 Hz
Equivalent Sampling Frequency		= [Real Time Sampling Frequency] × [Number of Frames Persisted]. Maximum 40 GHz, for repetitive signals whose maximum frequency is less than ¼ of the real time sampling frequency. Not valid for the case of post-trigger.
Buffer Size	Normal Frame Mode	Analog	Single Channel 40000 samples (8 bits) 20000 samples (16 bits) Dual Channels 20000 samples / channel (8 bits, Non-ALT mode) 10000 samples / channel (16 bits, Non-ALT mode) 40000 samples / channel (8 bits, ALT mode) 20000 samples / channel (16 bits, ALT mode)
	Normal Frame Mode	Digital	20000 samples (1 bit)
	Record Mode (Streaming Mode)	Limited only by hard disk space available and maximum file size allowed by the operating system. Maximum sampling frequency for continuous streaming is computer speed and software setting dependent and typically 10 MHz (single channel, 8 bit) in Multi-Instrument.
	Roll Mode (Streaming Mode for Low Frequency Signals)	Limited only by the computer memory available. Roll Mode is allowed when fs ≤ 1MHz and [Record Length] ≥ 4 × [Roll Width]. Maximum sampling frequency for continuous streaming is computer speed and software setting dependent.
Sweep Time		5 ns ~ 500 s (Non-Streaming Mode)
Sampling Frequency Accuracy		± 50 ppm

Oscilloscope Vertical (Analog) Axes
Number of Channels		2 (i.e. Ch. A and Ch. B)
ADC Bit Resolution		8 Bits
Enhanced ADC Bit Resolution (available only when Sampling Frequency is less than 100 MHz)		16 Bits If this option is selected, the effective bit resolution increases from 8 bits to up to 16 bits as the sampling frequency goes down. (Assuming white noise in the signal)
		Sampling Frequency	Effective Bit Resolution		Sampling Frequency		Effective Bit Resolution
		≥ 100 MHz	8 Bits		≤ 25 MHz		9 Bits
		≤ 6.25 MHz	10 Bits		≤ 1.563 MHz		11 Bits
		≤ 391 kHz	12 Bits		≤ 97.7 kHz		13 Bits
		≤ 24.4 kHz	14 Bits		≤ 6.10 kHz		15 Bits
		≤ 1.526 kHz	16 Bits
Bandwidth	fs > 50 MHz	80 MHz
	fs ≤ 50 MHz	8 Bits		No Effective Bit Resolution Enhancement		80 MHz
		8 Bits		Effective Bit Resolution Enhancement		15 ~ 25 MHz
		16 Bits		Effective Bit Resolution Enhancement		about 0.443 fs
Voltage Measuring Range (Full Scale)		± 10 mV, ± 20 mV, ± 50 mV, ± 100 mV, ± 200 mV, ± 500 mV, ± 1 V, ± 2 V, ± 5 V, ± 10 V, ± 20 V, ± 50 V
Max. Allowed Voltage		± 100 V (DC + AC peak), derated above 100kHz
DC Accuracy		± 1%
Coupling Type		AC / DC
Input Isolation		No (Isolation can be achieved through a USB isolator)
Terminal Type		Referenced Single-Ended, BNC
Input Impedance		1 MΩ , 15 pF
Zero Calibration		Through hardware. Individually done at factory, user adjustable
Gain Calibration		Through hardware. Individually done at factory, user adjustable

Oscilloscope Vertical (Digital) Axis
Number of Channels	1 (i.e. External Trigger Channel, 1-bit ADC)
Bandwidth	140 MHz
Threshold Resolution	45 mV
Threshold Hysteresis	225 mV
Threshold Range	± 20 V
Max. Allowed Voltage	± 100V (DC + AC peak), derated above 100kHz
Threshold DC Accuracy	± 1%
Coupling Type	DC
Input Isolation	No (Isolation can be achieved through a USB isolator)
Terminal Type	Referenced Single-Ended, BNC
Input Impedance	1 MΩ , 15 pF
Zero Calibration	Through software. Individually done at factory.
Gain Calibration	Through software. Individually done at factory.

Oscilloscope Trigger
Trigger Detection Method	Digital
Trigger Source	Ch. A, Ch. B, EXT, ALT
Trigger Mode	Auto, Normal, Single, Slow
Trigger Edge	Rising, Falling
Trigger Level	Adjustable within full scale
Pre-Trigger	-100% ~ 0% of Record Length
Post-Trigger	0 ~ 100% of Record Length
Trigger Frequency Rejection	Nil: No Rejection HFR: High Frequency Rejection, cut off at 0.11fs NR0: Noise Rejection, hysteresis = 1% of half of full scale NR1: Noise Rejection, hysteresis = 2% of half of full scale NR2: Noise Rejection, hysteresis = 4% of half of full scale NR3: Noise Rejection, hysteresis = 8% of half of full scale NR4: Noise Rejection, hysteresis = 16% of half of full scale HN0: HFR + NR0 HN1: HFR + NR1 HN2: HFR + NR2 HN3: HFR + NR3 HN4: HFR + NR4 HNX: selectable HFR + adjustable hysteresis = 0% ~ 25% of half of full scale Note: The specified hysteresis may be modified internally to ensure [Trigger Level (%)] – [Hysteresis (%)] ≥ -100% at rising edge, or [Trigger Level (%)] + [Hysteresis (%)] ≤ 100% at falling edge.

Oscilloscope Dynamic Performance (Typical)
THD	fs=100 kHz, f=1 kHz, from 2^nd to 20^th order, full-scale input: 8 bits (without bit resolution enhancement): ≤ -55 dB 8 bits (with bit resolution enhancement): ≤ -56 dB 16 bits: ≤ -59 dB
IMD (250 Hz + 8 kHz, 4:1)	fs=100 kHz, from 2^nd to 3^rd order, full-scale input: 8 bits (without bit resolution enhancement): ≤ -51 dB 8 bits (with bit resolution enhancement): ≤ -52 dB 16 bits: ≤ -57 dB
IMD (19 kHz +20 kHz, 1:1)	fs=100 kHz, 2^nd order only, full-scale input: 8 bits (without bit resolution enhancement): ≤ -65 dB 8 bits (with bit resolution enhancement): ≤ -65 dB 16 bits: ≤ -78 dB
SFDR	fs=100 kHz, f=1 kHz, full-scale input: 8 bits (without bit resolution enhancement): ≥ 61 dB 8 bits (with bit resolution enhancement): ≥ 61 dB 16 bits: ≥ 62 dB
Crosstalk	≤ -45 dB (at the same voltage measuring range for full bandwidth)
Noise	For voltage measuring ranges ± 50 mV and above: 8 bits (without bit resolution enhancement): ≤ ± 3 counts (± 1%) 8 bits (with bit resolution enhancement, fs =100 kHz): ≤ ± 2 counts (± 0.8%) 16 bits (fs =100 kHz): ≤ ± 0.3 8-bit count (± 0.1%) For voltage measuring ranges ± 10 mV and ± 20 mV: 8 bits (without bit resolution enhancement): ≤ ± 15 counts (± 6%) 8 bits (with bit resolution enhancement, fs =100 kHz): ≤ ± 9 counts (± 4%) 16 bits (fs =100 kHz): ≤ ± 1 8-bit count (± 0.4%)

Signal Generator General
Number of Channels	1
Coupling Type	DC
Output Isolation	No
Terminal Type	Referenced Single-Ended, BNC
Output Impedance	About 600 Ω
Overvoltage Protection	± 35 V

Signal Generator -Analog (when Signal Generator is running)
Output Voltage Range		± 2 V, adjustable
DAC Bit Resolution		10 Bits
Output Sampling Frequency (fs)		DDS Mode or Streaming Mode 6.25 MHz, 3.125 MHz, 1.5625 MHz, 625 kHz, 312.5 kHz, 125 kHz, 62.5 kHz, 31.25 kHz, 25 kHz, 12.5 kHz, 6.25 kHz, 3.125 kHz
Output Sampling Frequency Accuracy		± 50 ppm
Bandwidth		DC ~ 150 kHz
Output Signal Frequency		0 ~ ½ of output sampling frequency
Rise Time (10% ~ 90%)		< 2.3 µs
DC Offset Range		Full output voltage range
DC Accuracy		± 0.5% of full scale
Waveform	DDS Mode*	Sine, Rectangle (duty cycle adjustable), Triangle, Saw Tooth, White Noise, MLS (length = 2⁶³-1), User Configurable Waveform Library (Arbitrary), Musical Scale
	Streaming Mode*	Sine, Rectangle (duty cycle adjustable), Triangle, Saw Tooth, White Noise, Pink Noise, MultiTones, MLS (127~16777215), DTMF, User Configurable Waveform Library (Arbitrary), Musical Scale
Signal Frequency Resolution	DDS Mode	<0.0007 Hz (fs = 3.125 MHz)
	Streaming Mode	Virtually infinitesimal
Buffer Size	DDS Mode	Without interpolation: 1024 samples With interpolation: 1024 × 65536 = 67108864 samples (Note: interpolation is only available when fs <= 3.125 MHz)
	Streaming Mode	Virtually unlimited
Frequency Sweep	DDS Mode	Supports linear sweep of all types of repetitive waveforms. Sweep speed range: 1/32768 × fs² / 2³² ~ 65535 × fs² / 2³² (e.g. 0.017 Hz/s ~ 37.3 MHz/s when fs = 1.5625 MHz)
	Streaming Mode	Supports linear and logarithmic sweep of all types of repetitive waveforms. Sweep speed range: unlimited
Amplitude Sweep	DDS Mode	Supports linear sweep of all types of waveforms. Sweep speed range: 1/32768 × fs / (2³² –1) ~ 65535 × fs / (2³² –1) (e.g. 0.00000111 %/s ~ 2384 %/s when fs = 1.5625 MHz)
	Streaming Mode	Supports linear and logarithmic sweep of all types of waveforms. Sweep speed range: unlimited
Duration (Signal Length) Resolution	DDS Mode	1/fs or 1µs, whichever is greater
	Streaming Mode	1/fs
THD		≤ -60 dB (fs = 1.5625 MHz, f = 1 kHz, from 2^nd to 20^th order, full-scale output)
SFDR		≥ 65 dB (fs = 1.5625 MHz, f = 1 kHz, full-scale output)
Zero Calibration		Through software. Individually done at factory.
Gain Calibration		Through software. Individually done at factory.

*DDS mode consumes almost no computer CPU time while streaming mode consumes a lot. Maximum sampling frequency for continuous streaming is computer speed and software setting dependent and typically 10 MHz in Multi-Instrument. More advanced functions are provided via Multi-Instrument software under streaming mode. Please refer to Multi-Instrument software manual for details.

Signal Generator - Digital (when Signal Generator is not running)
Voltage Range		0 ~ 3.3 V, not adjustable
Output Signal Frequency Accuracy		± 50 ppm
Bandwidth		13 MHz
Rise Time (10% ~ 90%)		< 50 ns
Waveform	Square	Signal Frequency	25 MHz / N, (N=1, 2, 3, ….25000)
	MLS	Sampling Frequency	25 MHz / N, (N=1, 2, 3, ….25000)

General
Interface	USB 2.0 High Speed / USB 1.1 Full Speed / USB Isolator
Device Category in Multi-Instrument	ADC Device	VT DAQ 1
	DAC Device	VT DAO 1
Firmware Upgradable	Yes
Power	Bus powered by USB port, no external power source required.
Power Consumption	Max. 2W
Dimensions	145 mm (L) × 108 mm (W) × 26 mm (H), anodized aluminum case
System Requirement	Windows XP, Vista, 7, 8 or above, 32 bit or 64 bit
Operating Temperature	0° C ~50° C

4. P6100 Oscilloscope Probe Hardware Specifications

Attenuation Ratio	× 1, × 10
Bandwidth	DC ~ 100 MHz (× 10), DC ~ 6 MHz (× 1)
Input Impedance	1 MΩ (× 1, with VT DSO connected) 10 MΩ (× 10, with VT DSO connected)
Input Capacitance	18.5 pF ~ 22.5 pF (× 10), 85 pF ~ 120 pF (× 1)
Input Capacitance Compensation Range	10 ~ 30 pF
Length	1.2 m

Accessories include: a 12 cm snap-on rotating ground lead, a sprung hook, two marker rings, a probe compensation adjustment tool, two probe tip caps.

5. Examples

1) Measurements of PAL Composite Video Signals

PAL Composite Video Signal Measured by VT DSO-2820

PAL Composite Video Signal Measured by VT DSO-2820

2) Measurements of a 500Hz sine wave and a 1kHz square wave under ALT trigger mode

500Hz Sine and 1kHz Square waves measured by VT DSO-2820

3) Mixed signal display. Channels A & B are analog input channels while Channel EXT is used as a digital input channel

Mixed Signal Measured By VT DSO-2820

4) Transfer Function Measurement using Frequency Stepped Sine Signal from 1Hz to 100kHz and Auto Ranging Algorithm (Device Test Plan required)

5) Impedance & Phase Measurement using Frequency Stepped Sine Signal from 1Hz to 100kHz and Auto Ranging Algorithm (Device Test Plan required)

6) Impedance & Phase vs Frequency of a filter using swept sine from 50kHz to 100kHz (Multi-Instrument Pro required)