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8 Frequently Asked Questions – FAQ
Q: What is the delay time for Ethernet packets through the SPY?
A: The delay time depends on the UseCase that is set. For SPY Mode without wrapper the
delay is around 12µs. For Media Converter Mode, the delay is around 2.8µs. This delay
is independent of the Ethernet packet frame size.
Q: What is the delay time for Ethernet packets between two BroadR-Reach ports?
A: For the Media Converter Mode, the delay between two BroadR-Reach ports is around
1.5µs. The delay is independent of the Ethernet packet frame size.
Q: Is AVB supported?
A: The SPY is especially built for testing AVB. For minimum delay the SPY has to be set to
SPY UseCase. When using automotive AVB profile the time synchronization is not influ-
enced by the SPY.
There is no special handling of AVB frames as this is not necessary.
Q: The BR Link LED is lit but I have no valid BR Link. What is going wrong?
A: There is a bug in the used BR PHY. When the BR Plus and Minus lines are swapped
and the SPY Port is set to BR Slave then the Link LED is lit, but there is no data trans-
mission possible. So please connect the BR lines correctly.
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