element14 Community
element14 Community
    Register Log In
  • Site
  • Search
  • Log In Register
  • About Us
  • Community Hub
    Community Hub
    • What's New on element14
    • Feedback and Support
    • Benefits of Membership
    • Personal Blogs
    • Members Area
    • Achievement Levels
  • Learn
    Learn
    • Ask an Expert
    • eBooks
    • element14 presents
    • Learning Center
    • Tech Spotlight
    • STEM Academy
    • Webinars, Training and Events
    • Learning Groups
  • Technologies
    Technologies
    • 3D Printing
    • FPGA
    • Industrial Automation
    • Internet of Things
    • Power & Energy
    • Sensors
    • Technology Groups
  • Challenges & Projects
    Challenges & Projects
    • Design Challenges
    • element14 presents Projects
    • Project14
    • Arduino Projects
    • Raspberry Pi Projects
    • Project Groups
  • Products
    Products
    • Arduino
    • Avnet Boards Community
    • Dev Tools
    • Manufacturers
    • Multicomp Pro
    • Product Groups
    • Raspberry Pi
    • RoadTests & Reviews
  • Store
    Store
    • Visit Your Store
    • Choose another store...
      • Europe
      •  Austria (German)
      •  Belgium (Dutch, French)
      •  Bulgaria (Bulgarian)
      •  Czech Republic (Czech)
      •  Denmark (Danish)
      •  Estonia (Estonian)
      •  Finland (Finnish)
      •  France (French)
      •  Germany (German)
      •  Hungary (Hungarian)
      •  Ireland
      •  Israel
      •  Italy (Italian)
      •  Latvia (Latvian)
      •  
      •  Lithuania (Lithuanian)
      •  Netherlands (Dutch)
      •  Norway (Norwegian)
      •  Poland (Polish)
      •  Portugal (Portuguese)
      •  Romania (Romanian)
      •  Russia (Russian)
      •  Slovakia (Slovak)
      •  Slovenia (Slovenian)
      •  Spain (Spanish)
      •  Sweden (Swedish)
      •  Switzerland(German, French)
      •  Turkey (Turkish)
      •  United Kingdom
      • Asia Pacific
      •  Australia
      •  China
      •  Hong Kong
      •  India
      •  Korea (Korean)
      •  Malaysia
      •  New Zealand
      •  Philippines
      •  Singapore
      •  Taiwan
      •  Thailand (Thai)
      • Americas
      •  Brazil (Portuguese)
      •  Canada
      •  Mexico (Spanish)
      •  United States
      Can't find the country/region you're looking for? Visit our export site or find a local distributor.
  • Translate
  • Profile
  • Settings
Rohde & Schwarz
  • Products
  • Manufacturers
  • Rohde & Schwarz
  • More
  • Cancel
Rohde & Schwarz
Blog Logging & charting tool for R&S power supplies
  • Blog
  • Forum
  • Documents
  • Events
  • Polls
  • Files
  • Members
  • Mentions
  • Sub-Groups
  • Tags
  • More
  • Cancel
  • New
Join Rohde & Schwarz to participate - click to join for free!
  • Share
  • More
  • Cancel
Group Actions
  • Group RSS
  • More
  • Cancel
Engagement
  • Author Author: rohde&schwarz
  • Date Created: 3 Jul 2020 2:06 PM Date Created
  • Views 3294 views
  • Likes 1 like
  • Comments 0 comments
  • logging
  • data logging
  • Rohde & Schwarz DC Power Supplies
  • r&s®ngm200
  • dc power supplies
  • power supplies
  • r&s®ngl200
Related
Recommended

Logging & charting tool for R&S power supplies

rohde&schwarz
rohde&schwarz
3 Jul 2020

Let’s learn more about the logging and fast logging functionality of R&SRegisteredNGM and R&SRegisteredNGL. The associated application program provides charting functionality for logged voltage, current and power values.

 

Standard logging

Standard logging records timestamps together with readings for voltage, current and power for each available channel. It is always global for all available channels of the power supply. The measurement interval can be set in the range between 0.1 second and 600 seconds. The start of the logging can be triggered either by an internal event or by an external trigger signal.

 

The sample rate and duration of standard logging can be specified in four modes:

  1. Unlimited mode: When started, the logging runs until it is stopped. In this mode the interval (sample period) can be specified.
  2. Count mode: When started, the logging collects the specified number of values and then stops. In this mode the interval (sample period) and the number of sampled values can be specified.
  3. Duration mode: When started, the logging runs for the specified duration. In this mode the interval (sample period) and the duration of the logging can be specified.
  4. Span: Logging starts at the specified date and time and runs for the specified duration. In this mode the start time, the interval (sample period) and the duration of the logging can be specified.

 

While R&SRegisteredNGL power supplies offer the standard logging functionality, they do not provide the fast logging as R&SRegisteredNGM does. The R&SRegisteredNGM power supply series is a high-precision source and sink with high-speed voltage and current logging capability.

 

Fast logging

How does fast logging work on R&SRegisteredNGM power supply?

 

It records voltage and current readings versus time, but without time stamps. Fast logging is always individual to each channel of the power supply. It can be configured, started and stopped in each channel independently. The data is collected in separate files. Like the standard logging, the fast logging can also be started by a trigger event configured locally in the menu. For fast logging, it is recommended to select a fix current measurement range if the maximum expected current is known. This ensures that logging data is continuously available.

 

For fast logging, a sample rate has to be selected out of an available set. The fast logging runs for the specified duration after it has started. Available sample rates for fast logging are 15, 30, 61, 122, 244, 488, 976, 1953, 3906, 7812, 15625, 31250, 62500, 125000, 250000 and 500000 values per second.

 

Remote control connection

R&SRegisteredNGM or R&SRegisteredNGL can be operated remotely, either via USB, LAN or GPIB connection between the controlling PC and the power supply. In remote control mode, the logging data must be collected via the remote control interface every time the system reports new data to be available. The interface used for the remote connection must support the resulting data rate.

 

There are some measurement requirements to be mindful of when using remote control functionality, since the fast logging function of the DC power supply R&SRegisteredNGM requires a certain minimum data rate, depending on the sample rate of the logging function. The data rate of GPIB is sufficient only for the lower sample rates of the fast logging function. Therefore, GPIB is not recommended as connection to the R&SRegisteredNGM for this application.

 

The USB interface in the R&SRegisteredNGM and R&SRegisteredNGL supports two different USB classes. The “CDC” class emulates a serial interface via USB-to-serial converter and has the advantage of compatibility with older remote control systems. Since the data rate of the “CDC” class is not sufficient for fast logging, the “TMC” class needs to be used.

 

Save logging data locally to files, and display them in charts

Standard logging data is originally stored locally, either on internal memory or to a USB stick connected to the R&SRegisteredNGL or R&SRegisteredNGM. The location of the log file must be selected locally in the menu. As standard logging data is primarily stored on the power supply, display and storing of standard logging data is only possible with a power supply connected. Standard logging files contain voltage, current and power readings for one or two channels. User can choose specific power supply channel as a data source and display the data in a form of a diagram. While the respective voltage and current data can be displayed in one diagram, power data is always displayed in a separate diagram. Before the diagrams can be created, the data has to be transferred from the power supply to the controlling PC over the remote control interface.

 

Fast logging data is stored in floating-point raw format. If started manually, it is stored to a USB memory stick connected to the R&SRegisteredNGM, which must support the resulting data rate. During fast logging, data is transferred from the R&SRegisteredNGM to the controlling PC in real time and saved every 0.5 seconds. Each logging operation generates about two data files per second. The file size depends largely on the sample rate of the fast logging. The file name consists of date and time, sample rate, channel number and a sequential number. The log data of the selected file or of the complete fast log to which the selected file belongs, is displayed, depending on the settings. After termination of the logging, the data can be exported resp. converted offline to a character separated ASCII format.

 

 

You can find more information about logging tool on R&SRegisteredNGM an R&SRegisteredNGL power supplies in this AppNote!

  • Sign in to reply
element14 Community

element14 is the first online community specifically for engineers. Connect with your peers and get expert answers to your questions.

  • Members
  • Learn
  • Technologies
  • Challenges & Projects
  • Products
  • Store
  • About Us
  • Feedback & Support
  • FAQs
  • Terms of Use
  • Privacy Policy
  • Legal and Copyright Notices
  • Sitemap
  • Cookies

An Avnet Company © 2025 Premier Farnell Limited. All Rights Reserved.

Premier Farnell Ltd, registered in England and Wales (no 00876412), registered office: Farnell House, Forge Lane, Leeds LS12 2NE.

ICP 备案号 10220084.

Follow element14

  • X
  • Facebook
  • linkedin
  • YouTube