VT-DSO-2A20 slide

Buy VT DSO-2A20 (US$389.95)

PC based USB 10~16Bit 200MSPS 80MHz Oscilloscope, Spectrum Analyzer, 12-bit 6.25MSPS 150kHz AWG Signal Generator

Introduction

VT DSO-2A20 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.
Find out more: Brochure, Manual

Package Contents

  1. VT DSO-2A20 unit with a hardware activated Multi-Instrument Standard software license
  2. 2 x 100MHz Oscilloscope Probe P6100 with two switchable positions: x 1 and x 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-2A20 driver)
  6. Individual voltage calibration data

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] x [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)
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 x [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 10 Bits (can be reduced to 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 10 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 10 Bits ≤ 25 MHz 11 Bits
≤ 6.25 MHz 12 Bits ≤ 1.563 MHz 13 Bits
≤ 391 kHz 14 Bits ≤ 97.7 kHz 15 Bits
≤ 24.4 kHz 16 Bits ≤ 6.10 kHz 16 Bits
≤ 1.526 kHz 16 Bits
Bandwidth fs > 50 MHz 80 MHz
fs ≤ 50 MHz 8 Bits No Effective Bit Resolution Enhancement 80 MHz
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 ± 0.5%
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 11 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 2nd to 20th order, full-scale input:
8 bits (without bit resolution enhancement): ≤ -55 dB
8 bits (with bit resolution enhancement): ≤ -56 dB
16 bits: ≤ -69 dB
IMD (250 Hz + 8 kHz, 4:1) fs=100 kHz, from 2nd to 3rd order, full-scale input:
8 bits (without bit resolution enhancement): ≤ -51 dB
8 bits (with bit resolution enhancement): ≤ -52 dB
16 bits: ≤ -59 dB
IMD (19 kHz +20 kHz, 1:1) fs=100 kHz, 2nd 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 12 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 ± 0.2% 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 x 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 x fs2 / 232 ~ 65535 x 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 x fs / (232 -1) ~ 65535 x 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 2nd to 20th 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) x 108 mm (W) x 26 mm (H), anodized aluminum case
System Requirement Windows XP, Vista, 7, 8, 8.1, 10 or 11, 32 bit or 64 bit
Operating Temperature 0° C ~50° C

Hardware Specifications (P6100 Oscilloscope Probe)

General
Attenuation Ratio x 1, x 10
Bandwidth DC ~ 100 MHz (x 10), DC ~ 6 MHz (x 1)
Input Impedance 1 MΩ (x 1, with VT DSO connected)
10 MΩ (x 10, with VT DSO connected)
Input Capacitance 18.5 pF ~ 22.5 pF (x 10), 85 pF ~ 120 pF (x 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.