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PC based USB 8~16Bit 200MSPS 80MHz Oscilloscope, Spectrum Analyzer
VT DSO-2820R is one of the second-generation USB DSOs (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
Oscilloscope Horizontal (Time) Axis | |||
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Real Time Sampling Frequency (fs) |
Single Analog Channel 200 MHz Single or Dual Analog Channels 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 |
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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) |
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. |
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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. |
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Sweep Time | 5 ns ~ 500 s (Non-Streaming Mode) | ||
Sampling Frequency Accuracy | ± 50 ppm |
Oscilloscope Vertical (Analog) Axes | |||||||
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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) |
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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 | ||||
Effective Bit Resolution Enhancement | 15 ~ 25 MHz | ||||||
16 Bits | Effective Bit Resolution Enhancement | about 0.443 fs | |||||
Voltage Measuring Range (Full Scale) |
± 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 | ||||||
Gain Calibration | Through hardware. Individually done at factory |
Oscilloscope Trigger | |
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Trigger Detection Method | Digital |
Trigger Source | Ch. A, Ch. B, 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) | |
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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: ≤ -59 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: ≤ -57 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 |
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%) |
Signal Generator General | |
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Number of Channels | 1 (digital signal only) |
Coupling Type | DC |
Output Isolation | No |
Terminal Type | Referenced Single-Ended, probe calibration connector |
Output Impedance | About 600 Ω |
Overvoltage Protection | ± 35 V |
Signal Generator - Digital (when Signal Generator is not running) | |||
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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 | ||
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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 | Not applicable | |
Firmware Upgradable | Yes | |
Power | Bus powered by USB port, no external power source required. | |
Power Consumption | Max. 1.5W | |
Dimensions | 111 mm (L) x 70 mm (W) x 24 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 |
General | |
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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.