How to Validate Electrical Evaluation Board Performance

+ Functional Interconnect Test Solutions

Validate Evaluation Board Error Performance

Validating an electrical evaluation board requires engineers to exercise high-speed traffic through the complete receive-to-transmit path while preserving visibility into each configured lane. As PAM4 lane rates increase, testing one channel at a time can hide channel-to-channel differences and make it harder to compare the behavior of the full device under consistent conditions. Engineers need a repeatable way to generate Pseudo-Random Binary Sequence Quaternary (PRBSQ) traffic, route loopbacks through an active or passive device under test, and measure bit error ratio (BER) performance across multiple lanes simultaneously. The setup should also support different lane mappings, signaling rates, loopback configurations, and test durations so engineers can evaluate the board under representative operating conditions without rebuilding the test methodology for every scenario.

Multi-lane validation becomes more useful when engineers can compare BER and Forward Error Correction (FEC) behavior across every active channel under the same test conditions. Per-lane results help reveal channel-to-channel variations that may come from the device, board routing, connector implementation, or test configuration. Engineers can extend the analysis with pre-FEC BER, post-FEC BER, FEC overhead, FEC margin, and symbol-error statistics while monitoring performance during repeated or long-duration tests. Saved configurations and result data also make it easier to repeat measurements after board revisions, firmware updates, or device changes. Combining pattern generation, loopback control, multi-lane error analysis, and repeatable result capture gives engineering teams a consistent method for evaluating electrical evaluation boards before moving into broader system-level validation.

Electrical Evaluation Board Validation Solution

Validating an electrical evaluation board requires coordinated multi-lane traffic generation, loopback control, and error analysis across active or passive devices. Keysight's Functional Interconnect Test Solutions (FITS-8CH) provides eight transmit and eight receive differential channels for simultaneous PAM4 error-performance validation. Engineers can generate PRBSQ traffic, configure lane mappings and loopback paths, and measure per-lane BER and FEC performance within a single test environment. High Drive channels support higher-loss test paths, while Chip-to-Module channels support standard Ethernet signal levels. Engineers can also define test duration, monitor results in real time, and evaluate pre-FEC BER, post-FEC BER, FEC margin, FEC overhead, and symbol-error statistics. Reusable configurations and PDF or CSV reporting support repeatable comparison across board revisions, DUT changes, and validation cycles. The solution brings multi-lane traffic generation, loopback testing, error analysis, and reporting together for consistent electrical evaluation-board performance validation.

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