SFP+ provides submit reducing the entire system cost. On the other, its physical layer (PHY) and performance are placed with new burdens. The SERDES framer interface (SFI) between your host board and the SFP+ module displays great design and testing challenges

One challenge attributes to the increased port density and the testing time necessary for 48 or even more ports per rack. For example, there are 15 measurements each for the host transmitter tests, and each one of these measurements using manual strategies can easily take from 3 to 5 minutes. This implies it will require engineers more than one hour per port to complete the mandatory tests

The second one which engineers have to consider is: if a measurement fails, how do they determine which component is leading to such failing, and how they debug the problem to reach at the primary cause. Such determinations are specially challenging due to the tight physical packaging and compact designs

Another challenge falls on the connectivity. That's: ways to get the signal right out of the device under test (DUT) to an oscilloscope. Test fixtures are typically required, but questions arise around consequently: if the fixtures have already been tested and validated against the specification

The excess problem is based on the actual fact that the Juniper sfpp-10ge-sr requires some measurements to be performed utilizing a PRBS31 signal. At a sampling rate of 50 Gsamples/s, the designer can acquire around 40 million unit intervals (UIs). At a sampling rate of 100 Gsamples/s, the instrument can acquire 20 million UIs. However, a PRBS31 pattern has a lot more than 2 billion UIs. Therefore, acquiring a whole pattern poses a challenge.Learn:www.oemfibers.com