Z800qac Freya

The Freya Z800qac is the industry's first dedicated 112G SerDes Auto-Negotiation & Link Training (AN/LT) test solution


The Z800qac Freya is designed specifically for Ethernet AN/LT testing at 56G/112G PAM4 SerDes speeds.

Ideally Auto-Negotiation & Link Training are initiated automatically, and the two devices run through the different states in the protocols to negotiate speed and tune to optimal settings. However not all endpoints behave the same and interpretations and implementations of the standards varies. Also, the quality of the AN/LT training results are not always consistent which can lead to erratic link stability.

The Z800qac Freya allows thorough testing of the endpoint behavior. It provides insight, visibility, and configuration possibilities to the AN and LT process making it easy to analyze DUT behavior during AN/LT, and configure and optimize the relevant AN parameters and LT coefficients.

Leveraging our award-winning Freya 800G test modules, the Z800qac Freya is a small 1U “desktop” tester that is easy to transport from site to site in a 19” flight case. In addition to this QSFP- DD version, there is also a OSFP version called the Z800oac Freya.

The advanced AN/LT test capabilities can also be enabled on “standard” Freya modules using a dedicated AN/LT Test Appliance license “Freya 800 AN/LT SW Lic”.

Layer 1 Test Tools

The Z800qac includes XenaManager, Xena’s user-friendly management software which supports the same L1 features as the Freya test modules incl.: PRBS, single stream TGA for PHY/PCS testing, Advanced PMA and PCS/FEC Error Injection, lane skewing & swapping, and ppm sweeping.

AN/LT Testing

Also included is the Xena OpenAutomation (XOA) AN/LT Test Utility and the AN/LT Protocol Test Suite for performance and conformance testing.

The Xena OpenAutomation (XOA) AN/LT Test Utility is a command line tool for Interactive AN/LT Protocol Testing with single stepping of the LT protocol towards the DUT while providing statistics and logging.

The Xena OpenAutomation (XOA) AN/LT Test Suite is designed for performance and compliance testing. It can be orchestrated from third party analyzers or automation systems through its REST API or run as a stand-alone application together with the XOA AN/LT Test Suite Application.


  • Dedicated and optimized AN/LT tester
  • Compact 1U 19” “desktop” format
  • 5-speeds: 800GE, 400GE, 200GE, 100GE & 50GE
  • OSFP cage
  • Supports 112G SerDes (PAM4) & 56G SerDes (PAM4)
  • Auto-Negotiation & Link Training (AN/LT)
  • Test DACs, ACCs and AN/LT Endpoints
  • Comprehensive PCS & PMA layer test capabilities
  • Ease of use

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  1. Interface category

    QSFP-DD800 – 800G, 400G, 200G, 100G, 50G Ethernet

    QSFP112 – 400G, 200G, 100G Ethernet

  2. Interface options

    QSFP-DD800 cage

    112G SerDes:
    • 1 x 800GE PAM4 IEEE 802.3df (D2.0) / Ethernet Technology Consortium or
    • 2 or 1 x 400GE PAM4 802.3ck or
    • 4 or 2 x 200GE PAM4 802.3ck or
    • 8 or 4 x 100GE PAM4 802.3ck
    56G SerDes:
    • 1 x 400GE PAM4 802.3bs or
    • 2 x 200GE PAM4 802.3cd or
    • 4 x 100GE PAM4 802.3cd or
    • 8 x 50GE PAM4 802.3cd

    QSFP112 cage
    112G SerDes:
    • 1 x 400GE PAM4 802.3ck or
    • 2 x 200GE PAM4 802.3ck or
    • 4 x 100GE PAM4 802.3ck

    Both cages must run with the same interface configuration (e.g. 4 x 100G) and same SerDes speed (e.g 112G)

    Power capacity using single cage: QSFP-DD800: 25W or QSFP112: 15W
    Power capacity using both cages: QSFP-DD800: 15W + QSFP112: 15W

  3. Forward Error Correction (FEC)

    RS-FEC (Reed Solomon) (544,514,t=15), IEEE 802.3 Clause 119, Clause 134

  4. Port statistics

    Link state, FCS errors, error injections, RX and TX Mbit/s, packets/s, packets, bytes

  5. Adjustable Inter Frame Gap (IFG)

    Configurable from 16 to 56 bytes, default is 20B (12B IFG + 8B preamble)

  6. Transmit line rate adjustment

    Ability to adjust the effective line rate by forcing idle gaps equivalent to -1000 ppm (increments of 10 ppm)

  7. Transmit line clock adjustment

    From -400 to 400 ppm in steps of 1 ppm

  8. PPM Sweep

    Configurable linear or step sweep +/- 400 ppm

  9. Field upgradeable

    System is fully field upgradeable to product releases (FPGA images and software)

  10. Loopback modes

    • TXON2RX – TX-to-RX, packet is also transmitted from the port
    • TXOFF2RX – TX-to-RX, port’s transmitter is idle
    • Layer 1 RX2TX – PCS-layer loopback (TX not frequency locked to RX)


  1. Payload Test pattern


  2. Alarms

    PRBS pattern loss, link sync loss

  3. Error analysis

    Bit-errors: seconds, count, rate

  4. PCS virtual lane configuration

    User-defined skew insertion per Tx virtual lane, and user-defined virtual lane to SerDes mapping for testing of the Rx PCS virtual lane re-order function

  5. PCS virtual lane statistics

    Relative virtual lane order and relative skew measurements (up to 2048 bits)

    Corrected Bit error, Pre-FEC

  6. FEC Total statistics

    Total corrected FEC symbols, Total uncorrected FEC symbols, Estimated Pre-FEC BER, Estimated Post-FEC BER, Pre-FEC Error Distribution Graph

  7. Link Flap

    Single short or repeatable link down events with ms precision

  8. Error Injection (PMA Layer)

    Repeatable (burst) error inject periods at PMA layer with ms precision and configurable BER

  9. Error Injection (PCS/FEC Layer)

    Deterministic injection of symbol errors in FEC codewords

    Generation of sequences of FEC codewords with deterministic error distribution

AN/LT Testing

  1. Auto Negotiation and Link Training

    • Auto-negotiation: IEEE 802.3 Clause 73 and Ethernet Technology Consortium 400G/800G specification
    • Link training: IEEE 802.3 Clause 136 or 161
  2. AN/LT protocol testing

    Command line tool for Interactive AN/LT Protocol Testing with single step of the LT protocol towards DUT with Xena Open Automation (XOA) AN/LT Test Utility

  3. Performance and compliance testing of AN/LT

    Can be performed with Xena OpenAutomation (XOA) AN/LT Test Suite, or orchestrated from third party analyzers or automation systems


  1. Traffic Generator

    • Ethernet frames with FCS
    • Traffic load: up to 100%
    • Configurable Frame Size distribution and content


  1. Equalization Controls

    Tx Transmit Equalization Controls

    • Pre-emphasis
    • Attenuation
    • Post-emphasis

    Auto-Tune or manual control of Rx equalizer (FFE/DFE/CTLE)

  2. Signal Integrity Analysis

    • Advanced Signal Integrity View


  1. Number of transmit streams per port

    1 (wire-speed)

  2. Test payload insertion per stream

    Wire-speed packet generation

  3. Stream statistics

    TX Mbit/s, packets/s, packets, bytes, FCS error

  4. Bandwidth profiles

    Burst size and density can be specified. Uniform and bursty bandwidth profile streams can be interleaved.

  5. Packet length controls

    Fixed, random, butterfly, and incrementing packet length distributions from 56 to 12288 bytes

  6. Packet payloads (basic)

    Repeated user specified 1 to 18B pattern, an 8-bit incrementing pattern

  7. Packet scheduling modes

    Normal (stream interleaved mode) – standard scheduling mode, precise rates, minor variation in packet inter-frame gap.


  1. Number of traceable Rx streams per port

    1 (wire-speed)

  2. Stream statistics

    RX Mbit/s, packets/s, packets, bytes


  1. Oscillator characteristics

    Initial Accuracy is 3 ppm

    Frequency drift over 1st year: +/- 3 ppm (over 15 years: +/- 15 ppm)

    Temperature Stability: +/- 20 ppm (Total Stability is +/- 35 ppm)

  2. AC Voltage


  3. Frequency


  4. Max. Current

    2A with 120V supply, and 1A with 240V supply

  5. Max. Power


  6. Weight

    16.5 lbs (7.5 kg)

  7. Environmental

    Operating Temperature: 10° to 35° C

    Storage Temperature: -40° to 70° C

    Humidity: 8% to 90% non-condensing

  8. Dimensions

    W: 19” (48.26 cm)

    H: 1.75” (4.45 cm)

    D:  15” (37 cm)

  9. Max. Noise

    67.5 dBA

  10. Regulatory

    FCC (US), CE (Europe)

Includes this free software

Technical Documentation

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