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N8825A/B Infiniium 10BASE-T / 100BASE-TX Ethernet Decoder

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Keysight Technologies

N8825A/B Infiniium 10BASE-T / 100BASE-TX Ethernet Decoder

Data Sheet


The N8825A/B 10BASE-T/100BASE-TX Ethernet decoder allows you to view Ethernet packet data transmitted between Ethernet devices on all Infiniium real-time oscilloscopes. Today’s Ethernet devices must be backward-compatible to Ethernet technologies such as 10BASE-T/100BASE-TX standards. The N8825A/B 10BASE-T/100BASE-TX Ethernet protocol decoder provides timecorrelated views of physical layer (raw data) and transaction layer packets. Unique packet-waveform correlation marker makes it easy to scroll through waveforms to view synchronized packet and symbol lists. Both IPv4 and IPv6 internet protocols are supported.

Extend your oscilloscope’s capability with Keysight’s Ethernet protocol decoder

The application makes it easy to debug and test Ethernet designs on your Infiniium Series oscilloscope. Debugging Ethernet signals is as simple as clicking the “Auto Setup” button and capturing Ethernet protocol data, and decoding packets can be done in less than 30 seconds. The “Auto Setup” button automatically configures the sample rate, memory depth, threshold and trigger levels.

The Ethernet decoder supports various display formats including label, 4B pairs (8-bit) and 5B pairs (10-bit) decode. Also supported are descramble and electrical idles. Perform and view decode information on both live and saved waveforms. Decode up to four live or saved waveforms or functions.

Ethernet Setup, Protocol Triggering and Search Capabilities

Get access to a rich set of integrated protocol-level triggers. The application includes a suite of configurable protocol-level trigger conditions specific to Ethernet. When protocol triggering is selected, the application uses software-based and hardware based triggering. With software-based protocol triggering, the oscilloscope takes signals acquired using the oscilloscope analog channels and reconstructs protocol frames after each acquisition. It then inspects these protocol frames against specified protocol-level trigger conditions and triggers when the condition is met.

10BASE-T and 100BASE-TX Ethernet Protocol Decode

Display bidirectional serial data from the transmitter (yellow) and receiver (green) at the same time with time-correlated data. Decoded packets are shown below the waveforms and in the decode listings windows.

10BASE-T and 100BASE-TX Ethernet Decoder Application Specifications and Characteristics

The N8825A/B 10/100 Ethernet protocol viewer software offers several features to simplify the validation of your Ethernet designs:

  • Supports 10BASE-T and 100BASE-TX Ethernet standards
  • Internet protocol support for both IPv4 and IPv6
  • User datagram protocol - UDP support
  • Transmission control protocol - TCP support

Decode packet types:

  • MAC destination addresses
  • MAC source addresses
  • MAC length/type
  • Data
  • IPv4 header
  • IPv6 header
  • UDP header
  • TCP header
  • Frame check sequence – FCS
  • Cyclic redundancy check -CRC
  • End of packet
  • Error
  • 802.1Q
  • 802.AD

Decoder features:

  • Setup wizard for quick setup, configuration and test
  • Packet-level decode
  • Simultaneous display of packet/ symbol lists and waveform overlay
  • Capability to save symbol and packet data lists to .csv and .txt files
  • Packet decode details tab provides detailed information on packets
  • Channel information
  • Listing index
  • Control symbols
  • Data payload popup
  • Packet length
  • Payload display shows data payload
  • Unique packet-waveform correlation marker “blue line” makes it easy to scroll through waveforms to view synchronized packet and symbol lists
  • Comprehensive serial search capabilities
  • Trigger and stop on search
  • Packet search capability

Recommended oscilloscopes

The N8825A/B 10BASE-T/100BASE-TX Ethernet protocol decoder is compatible with Keysight Technologies Infiniium Series oscilloscopes with operating software revision 5.50 or higher. S-Series oscilloscopes have hardware serial trigger for 10BASE-T. For oscilloscopes with earlier revisions, free upg


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