The TSW14J56EVM uses an Intel PSG® Arria® V GZ
FPGA device for the receive and transmit functions
for the JESD204B link. One of the features of the
Arria® V GZ device is the On-Chip Signal Quality
Monitoring Circuitry (EyeQ). The EyeQ feature is a
debug and diagnosis tool that analyzes the
received data by measuring the horizontal and
vertical eye opening.
The following section provides a quick start-up example that highlights the software features of the EyeQ Scan analysis.
- Verify that the ADC EVM provides an FFT capture on HSDC Pro.
- Under the "Instrument Options" tab, click on "SERDES Test Options".
- A new window should appear with the following features:
- Lane – Selects one of the available lanes for the selected interface mode
- Time per iteration – Selects how long data is accumulated before generation of the Eye diagram. Increasing this value also increases the Test Time proportionally
- EQ DC Gain – Adjusts DC gain of FPGA receive hardware block
- EQ AC Gain – Adjusts AC gain of FPGA receive hardware block
- Display Standard Eye – Overlays one of the JESD204B receive eye-mask templates onto the Eye diagram
- After configuring the parameters, click on "START". The scan may take a few seconds to a few minutes depending on the parameters chosen.
Figure 3-5 shows an eye diagram of the ADC34J45EVM in 442
mode, sampling at 140 MHz and a lane rate of 2.8
GHz.