Altera High-Speed Development Kit, Stratix GX Edition Manuel d'utilisateur télécharger pdf (Page 42)

4–14 Quartus II Version 3.0 Altera Corporation

Stratix GX XCVR Eye Diagram High-Speed Development Kit, Stratix GX Edition User Guide

5. Press the reset pushbutton switch (GX_DEVCLR).

6. Press the start pushbutton switch (Stratix_GX_PB_0).

7. Inject errors by pressing Stratix_GX_PB_2 (S4) once. The Stratix GX

7-segment display (D9) shows 01 or more and Stratix GX LED5

illuminates. Because this test runs all channels at once, the Stratix

GX 7-segment display (D9) may show more than one error when

you press Stratix_GX_PB_2 (S4).

8. Inject two more errors by pressing S4 twice. D9 displays 03 or more.

Stratix GX XCVR

Eye Diagram

The Stratix GX XCVR eye test design produces an eye on an oscilloscope

at 3.125 Gbps using the on-board crystal oscillator and SMA cables. This

design also shows the dynamic control of the Stratix GX device for both

the pre-emphasis and VOD settings using the pushbutton switches S4

and S5. For this design, the Stratix GX transceiver block has the parameter

settings shown in Table 4–2.

f To perform this test, refer to “Power Up the Board & View the XCVR

Eye” on page 3–3.

Table 4–2. Transceiver Block Parameter Settings

Parameter Setting

Data Rate 3.125 GHz

Clock In 156.25 MHz

PLL Clock 156.25 MHz

PLL DC Coupling Disabled

PLL Bandwidth High

PPM Threshold 1000

8b/10b Encoder/Decoder Bypassed

Run Length Violation Bypassed

Rx Bandwidth Disabled

Word Alignment Mode Manual

Alignment Pattern 0101111100

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 ... 139 140

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Altera High-Speed Development Kit, Stratix GX Edition Manuel d'utilisateur Page 42