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StrongFirst® timing solution for Altera® FP GA Stratix® V, Arria ® V, Cyclone® V Transceiver PCI Express
PCI Express ® (PCIe®) is a high-speed serial transmission widely adopted in PC, server, FA equipment’s, measurement equipment’s, broadcast products etc. FPGAs provide PCIe® transceivers for these applications. StrongFirst oscillators have been confirm ed as reference clock functionality by actual e valuations.
1. Connect StrongFirst oscillator to Altera Arria® V PCIe® board as reference clock.
2. Measure PCIe® TX output with oscilloscope.
3. Calculate BER with oscilloscope’s Eye Diagram and RMS data.
PCIe® TX oscillator measurement result, PCIe® Transmission performance
Evaluation result of 3 oscillators (SOCL7050, SOCP7050 , Other). SOCL7050 has the best performance.
|
BER (bit error rate ) |
Oscillator (100M z Reference Clock) |
||
|
Other oscillator |
SOCL7050 |
SOCP7050 |
|
|
PCIe G en.1 (2.5 Gb ps) |
1.2 x 10-20 |
1.3 x 10 -27 |
7.5 x 10 -31 (Best) |
|
PCIe G en.2 (5 Gb ps) |
7.9 x 10-08 |
4.5 x 10 -08 |
2.6 x 10 -08 (Best) |
< PCIe® Gen.1 Data speed 2.5 Gbps>
RMS and Eye Pattern
|
Eye Diagram Jitter |
Oscillator (100M Hz reference Clock) |
||
|
SOCL7050 |
SOCP7050 |
Other oscillator |
|
|
(2nd PLL CDR) |
5.56 |
4.92 |
6.11 |
BER (bit error rate) calculated with RMS.
|
BER (bit error rate) |
Oscillator (100M Hz reference Clock) |
||
|
SOCL7050 |
SOCP7050 |
Other oscillator |
|
|
(2nd PLL CDR) |
1.3 x 10 -27 |
7.5x 10-31 |
1.2 x 10 -20 |
The timing period to the first error occasion. (Unit: sec).
< PCIe® Gen.2 Data speed 5 Gbps >
RMS and Eye Pattern
|
Eye Diagram Jitter |
Oscillator (100M Hz reference Clock) |
||
|
SOCL7050 |
SOCP7050 |
Other oscillator |
|
|
(2nd PLL CDR) |
5.29 |
5.19 |
5.39 |
BER (bit error rate) calculated with RMS.
|
BER (bit error rate) |
Oscillator (100M Hz reference Clock) |
||
|
SOCL7050 |
SOCP7050 |
Other oscillator |
|
|
(2nd PLL CDR) |
4.5 x10 -08 |
2.6x 10-08 |
7.9 x 10 -08 |
The timing period to the first error occasion. (Unit: sec).
PCI Express, and PCIe are the registered trade marks of PCI-SIG.
Altera, Stratix, Arria, and Cyclone are the registered trade marks of Altera Corporation
