Altera Audio Video Development Kit, Stratix IV GX Edition - Manual (Page 40)

6–18 Chapter 6: Board Test System
Using the Board Test System
Audio Video Development Kit, Stratix IV GX Edition User Guide © November 2009 Altera Corporation
Once connected, the following controls are available:
■ Reset —Restarts the test.
■ Load —Passes a new seed value to the PRBS generator on the device.
■ Status —Displays the following status information during the loopback test:
■ Tx PLL —Shows whether the Tx PLL is locked or unlocked.
■ Rx PLL —Shows whether the Rx PLL is locked or unlocked.
■ Error status —Shows “No Error Detected” when the test is running correctly;
otherwise shows pertinent error.
■ Error control —Provides the following controls to track transaction errors detected
during analysis:
■ Errors —Displays the number of errors detected in the hardware.
■ Insert Error —Inserts a one-word error into the transaction stream each time
you click the button.
■ Clear —Resets the Errors counter to zero.
The SDI HSMC - PRBS Tab
The SDI HSMC - PRBS tab allows you test the functionality of the SDI video and AES
audio transmit and receive pairs. The tests are PRBS data pattern loopback tests using
the two AES digital audio ports and the two SDI digital video ports on the SDI HSMC.
AES audio channel tests run at 24 Mbps and SDI tests run at 2.97 Gbps.
To monitor results of each test, connect a BNC loopback cable between the
corresponding transmit and receive connectors. Tests run on all channels
simultaneously, but only channels with loopback cables display accurate information.
Figure 6–10 shows the SDI HSMC - PRBS tab.
Figure 6–9. Board with SMB Loopback Cable