646265-004 11
Intel
®
Ethernet Network Adapter E810-XXVDA4T
User Guide
2.3 Synchronization Signaling
The E810-XXVDA4T has two SMA connectors at the faceplate and two on-board U.FL connectors for
1588 high precision timing connectivity. Each SMA signal can be configured to be an input or an output.
The U.FL1 connector, associated with SMA1, can be output-only. The U.FL2 connector, associated with
SMA2, can be input-only. Currently, 1PPS and 10 MHz signaling on both SMA and U.FL connectors is
supported; additional signaling capabilities might be supported in future releases.
The 1PPS signaling is compliant with the ITU-T G.703 specification, but the 10 MHz signaling matches
the 1PPS requirements rather than the ITU-T G.703 10 MHz requirements. For devices expecting ITU-T
G.703 10 MHz requirements, DC blocks (for transmitted signaling from the E810-XXVDA4T) and bias
tees (for signaling received by the E810-XXVDA4T Rx) must be used.
2.4 Optional GNSS Module
The E810-XXVDA4TGG1 SKU includes a GNSS module installed as an add-in card, which provides the
E810-XXVDA4T with timing synchronization from GNSS constellations. This module outputs a 1PPS
signal. Hardware support for presence detection of the antenna and current-limit protection for the
E810-XXVDA4T antenna input is included on this module.
Table 5. E810-XXVDA4T Supported 1PPS Input Signal (50 Single-Ended)
Input Min Max Units
VIH 1.65 5.5 V
VIL -0.3 0.8 V
Rise Time 20 ns
Duty Cycle 1 51 %
Note: Assumes a 50 termination. Parameters specified as measured at termination.
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