Altera High-Speed Development Kit, Stratix GX Edition - Manual (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