Why do I Need to use a Hub When Communicating With the Instrument via Ethernet?

The AC Power Input in all Yokogawa instruments is designed as a 3-pin connection (one of which is a GND pin). In some parts of the world, PCs are sold with AC power cables that are 2-pin. Often times this means the PC does not have a proper connection to GND. In this case, if the PC was connected to the instrument via a cross-over cable only, the PC would not be able to get a good ground reference level. This is because the GND line/pin on an Ethernet cable to too thin and he connection would be prone to noise and disruptions in communication/data transfer with our instruments. 

To avoid the noise and communication disruptions, it is our recommendation to the customer to use a HUB when communicating to the instrument via Ethernet. The HUB will provide a very strong GND connection and eliminate most of the noise problems. HUBs are designed to provide a reliable and high quality communication/data transfer connection over an Ethernet at high speeds.  

In the US, most AC adaptors for PC and PC power connections are 3-pin, and have a GND connection. If the PC and the instrument are both well grounded, then there is no problem in using a cross-over cable to connect directly to our instrument. Since we don't know if there is a good GND connection in the customer's PC, we generally recommend using a HUB when connecting to the instrument via Ethernet.

Related Products & Solutions

DL7440/DL7480 Digital Oscilloscopes

8-channel 500 MHz oscilloscope with 16 logic inputs, for applications where four channels aren't enough.  Support for eight analog channels, 16 bits with 250MHz logic bandwidth, 16MP of recording memory, power analysis, serial bus analysis, and a broad selection of voltage and current probes.

DL9000 DSO Series

500MHz, 1.0GHz, and 1.5GHz DSOs for debug and high performance applications. 10th
generation oscilloscope from Yokogawa with industry leading 2.5 million wfms/sec and lowest dead time. Winner of Test & Measurement World's "Best in Test" award.

DLM2000 Mixed Signal Oscilloscopes

200, 350, and 500MHz mixed-signal oscilloscopes for every engineer. Best-in-class performance in usability, acquisition, analysis, and display—all at a price you can digest. Options include serial bus, vehicle bus, and power supply analysis functions.

DLM6000 MSO & DSO Series

500MHz, 1.0GHz, and 1.5GHz DSO and MSO models for debug, waveform characterization, bench top, or automated test applications. 4 channel models with 16 or 32 logic inputs. 12th generation oscilloscope with ergonomic physical and on-screen improvements.

GS200 DC Voltage / Current Source

The GS200 is a low voltage/current DC source with high accuracy, high stability, and high resolution.

GS610 Source Measure Unit

The GS610 is made up of a programmable current and voltage source, a voltmeter, and an ammeter. Each function can be combined into numerous operation modes.

GS820 Multi Channel Source Measure Unit

The GS820 is a highly accurate and highly functional 2-channel programmable DC voltage/current source that incorporates voltage/current generation and measurement function.

MW100 Data Acquisition Unit

High performance industrial-grade data acquisition systems with wide-ranging application support high-speed, high-withstand-voltage, high-reliability, multi-channel data acquisition system

MX100 PC-Based Data Acquisition Unit

A PC-based data acquisition system for the future, delivering unparalleled performance. When combined with Yokogawa's turnkey PC software, the MX100's multi-channel capability and high isolation voltage offers the ultimate in measurement power.

Precision Power Analyzer WT3000

With 0.02% accuracy and 1MHz bandwidth, the WT3000 delivers where the highest precision measurements are required. It is the industry standard for R&D work on inverters, motor drives, lighting systems and electronic ballasts, UPS systems, aircraft power, transformer testing, and other power conversion devices.

SL1000 High-Speed Data Acquisition Unit

The SL1000 is a modular data acquisition system that delivers independent, isolated channel hardware at high speeds up to 100 MSamples per channel, with no compromise in bit resolution, memory depth, or data streaming performance. Choose from a wide variety of I/O modules for electrical and physical sensor signal measurements to meet the needs of any medium channel count application.

WE7000 PC-Based Measurement Instruments

One system, multiple instruments:  WE7000 satisfies demands for fast, reliable and precise data acquisition which uses a standard laptop or PC as its user interface. Input modules plug into an expandable measuring station. Via the optical interface, it is possible to galvanically isolate the laptop/PC.

WT1600 Digital Power Meter

The High-end WT1600 is designed for a wide range of applications, from energy-saving to large load applications. The WT1600 has a six element input capability to provide maximum flexibility, and Basic Power Accuracy of 0.1% with 1 MHz Bandwidth.

WT1800 High Performance Power Analyzer

The WT1800 Power Analyzer offers maximum flexibility with up to six wattmeter elements, high bandwidths, simultaneous high speed digitizing, and wide voltage and current ranges. Although this model is still available, the newer WT1800E offers higher accuracy.

WT500 Mid-Range Power Analyzer

The WT500 Power Analyzer excels at single-phase and three-phase power measurements. Standard features include a color TFT display and USB interface for communications and memory. The instrument has a basic power accuracy of 0.1%, maximum inputs of 1000 V, 40 A and a measurement bandwidth of DC to 100 kHz.

Data Acquisition (DAQ)

Data acquisition (DAQ) is the measurement, recording, analyzing, and presentation of real world phenomena. It includes electrical measurements such as voltage, current, power as well as measurements through sensors and transducers including temperature, pressure, strain, vibration, and more.

Digital Power Analyzers

A Digital Power Analyzer is an instrument for research & development, design validation, and manufacturing test used to accurately measure electrical power characteristics.

Generators, Sources

For general purpose standalone applications or as core components in a high speed test and measurement system, Yokogawa sources and signal generators are highly accurate and functional.

High Speed Data Acquisition

Yokogawa high speed data acquisition systems deliver industry leading isolation, bit resolution, sampling rate, and memory depth, with independent channel hardware and easy to use software.

Low Speed DAQ & Industrial Recorders

Yokogawa’s performance-leading data acquisition and logging systems, plus a wide range of paper and paperless recorders, meet all your recording needs. Universal inputs accept voltage, thermocouple and RTD signals, and offer maximum flexibility over recording span and unit scaling.

Mixed Signal Oscilloscopes

A mixed signal oscilloscope is an instrument enabling the simultaneous, time correlated observations and analysis of analog with digital (logic) signals, to establish causal relationships between the various areas of a device's electronics. They are purpose-built tools for troubleshooting electrical anomalies, measuring parametric values, and monitoring cause and effect relationships between signals.

Oscilloscopes

Oscilloscopes are a common type of test instrument used to capture, analyze, and troubleshoot electrical or real world physical signals. Oscilloscopes observe the change of electrical signals over time, continuously graphed on a display as voltage or amplitude vs. time.

ScopeCorders

A ScopeCorder is an instrument combining a mixed signal oscilloscope and portable data acquisition recorder into a modular platform designed to capture both high-speed transients and low speed trends. Yokogawa’s ScopeCorder product family provides flexible and high-performance multi-channel test instruments by combining a variety of signal conditioning input modules, on-board calculations, and deep data acquisition storage into a off-the-shelf data acquisition solution.

Source Measure Units

A Source Measurement Unit (SMU) is a flexible test instrument which is capable of both sourcing and measuring voltage and/or current at the same time.

Top