High Speed (480 Mbps) Full Speed (12
Mbps) Low Speed (1.5 Mbps)
Current Output (5V ± 0.5V)
> 400 mA*
Current Output (5V ± 0.5V)
> 800 mA* (if
the USB port can supply)
Current Output (5V ± 0.5V)
> 800 mA* (if
the USB port can supply)
Data Isolation
1 kV
Data Isolation
2.5 kVDC @ 1 min
Data Isolation
2.5 kVDC @ 1 min
Power Isolation
1 kV
Power Isolation
2.5 kVDC @ 1 min
Power Isolation
2.5 kVDC @ 1 min
Connectors
USB-A-Plug for PC USB-A-Socket for
USB cable to device
Connectors
USB-A-Plug for PC USB-A-Socket for
USB cable to device
Connectors
USB-A-Plug for PC USB-A-Socket for
USB cable to device
Temperature Range
-40 °C ~ 50 °C
Temperature Range
-40 °C ~ 50 °C
Temperature Range
-40 °C ~ 50 °C
Size
50 × 25 × 12 mm
Size
50 × 23 × 14 mm
Size
50 × 23 × 14 mm
Undervoltage Protection
LED slow blinking
Undervoltage Protection
LED slow blinking
Overvoltage Protection
LED fast blinking
Overvoltage Protection
LED fast blinking
Overheating Protection
LED fast blinking
Overheating Protection
LED fast blinking
Power Efficiency
η ≥ 80%
Power Efficiency
η ≥ 80%
Supported Audio Interfaces
up to 96 kHz 24-bit stereo inputs &
outputs
Supported Audio Interfaces
up to 96 kHz 24-bit stereo inputs &
outputs
Supported Audio Interfaces
All including 192 kHz, 384 kHz,
768 kHz, 1536 kHz, 24-bit or 32-bit, stereo or multi-channel
inputs & outputs
Allow floating measurement using
a DSO with single-ended inputs after isolation of
earth ground?
Yes
Allow floating measurement using
a DSO with single-ended inputs after isolation of
earth ground?
Yes
Allow floating measurement using
a DSO with single-ended inputs after isolation of
earth ground?
It works perfectly in ground
referenced measurements.
In measurements
without referencing to the ground, It may or may not work
properly depending the potential of the point where
the
probe ground lead is connected to. Nevertheless,
no
short circuit and no damage will be incurred even if it is connected to a
point with a high potential, unlike the case with no
earth ground isolation.
Number of Isolators needed for
VT hardware?
One isolator provides sufficient power
to VT DSO: 2810R, 2810, 2810E, 2820R, 2820, 2820E,
2A10,
2A20, VT RTA: 168A, 168B, VT UltraMic-384, VT IEPE-2G05,
VT CAMP-2G05, 333D01
Two isolators provide sufficient power to VT DSO: 2A10E, 2A20E. A USB cable with two
heads on the PC side should be used
in this case.
Number of Isolators needed for
VT hardware?
One isolator provides sufficient power to
VT
DSO**: 2810R, 2810, 2810E,
2820R, 2820, 2820E, 2A10, 2A20,
2A10E, 2A20E VT RTA: 168A, 168B, VT UltraMic-384,
VT IEPE-2G05, VT CAMP-2G05, 333D01
Number of Isolators needed for
VT hardware?
One isolator provides sufficient power
to VT DSO**: 2810R, 2810, 2810E,
2820R, 2820, 2820E,
2A10, 2A20, 2A10E, 2A20E, VT RTA: 168A, 168B,
VT
UltraMic-384, VT IEPE-2G05,
VT CAMP-2G05, 333D01
* A standard USB 2.0 port (usually black in color) can output at least 500 mA while a
standard USB 3 port (usually blue in color) can output at least 900 mA. In fact, most
computers' USB
ports nowadays can supply a current of more than 1A. However, many
USB isolators in the market are unable to supply enough current to those
power demanding USB devices such as USB oscilloscopes.
** The second-generation VT DSOs support
both high speed (480Mbps) and full speed (12Mbps). High speed is preferrable as it is much faster
than full speed, resulting in much faster screen refresh
rates, and much higher sustainable sampling rates under the streaming
mode.
Important note: Isolating the
ground of an oscilloscope from the protective earth, through a
battery-powered laptop or USB isolator, is a safety hazard, be sure that
the oscilloscope probe ground lead never toughs anywhere with a
dangerous potential above the earth ground.
1. The USB Galvanic Isolator
is used for: 1) Protection of computer and
attached USB devices - GREAT for LAB & Field use! 2) Protection
of electronic test and measurement devices such as USB oscilloscopes and
USB signal generators, as well as the circuits under test, when doing electronic measurements 3) Protection of programmers and circuit boards
when programming embedded boards 4) Allow safe serial port galvanic
separation for communication 5) Avoiding ground loops between devices
- for instance PC->USB Isolator->USB SoundCard->Audio
Power Amplifier to eliminate hum created by gound loops
2. Package Contents
1) USB Isolator
3. How does it work?
Just plug the USB isolator into a USB port of a hub or PC and then plug your USB device into the USB
isolator. The PC and your USB device now have no electrical
connection but can still talk to each other. The USB isolator
module also transfers power from the PC to your USB device with no
electrical connection. Your USB device is now protected and can be
attached to other ground potentials without any ground loops that could
destroy your computer, USB device and other attached electronic devices.
4. Examples 1.
How to make floating or isolated measurements and break the ground loop
with a USB oscilloscope?
