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If possible I want to check the actual rate of the transceiver...
Features like eye diagram...bit error rate....
How we can do............
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The rate of your transceiver depends on how you configure it. If you configure it for 5000Mbps, and the transmit and receive PLLs are locked, and the link transfers valid data, then, assuming your references are precise, the 'actual rate' is 5000Mbps.
The eye diagram can be analyzed using the eyeQ feature of the transceiver; this feature is available with the Stratix IV devices, I'm not sure about the Stratix II GX.
The bit-error rate can be tested using a pseudo-random binary sequence (PRBS). A PRBS is a sequence of bits with properties that are a good stress-test of a serial link. When a PRBS pattern is received it can be used as the seed for a receiver-side PRBS generator. Once the receive side PRBS is initialized, the transmitter and receiver PRBS data can be XORed together. If the patterns match, then the result of the XOR is zero, whereas if there are bit-errors, bits will be set. If you count the number of bits set over a long period of time, you create a bit-error-rate tester.
Cheers,
Dave
Honored Contributor
