Altera Arria V SoC - Manual (Page 31)

Chapter 5: Board Test System 5–11
Using the Board Test System
June 2014 Altera Corporation Arria V SoC Development Kit
User Guide
■ bits —Displays the number of bits transmitted since clicking Start.
■ Inserted errors —Displays the number of errors inserted by clicking Insert Error
button.
■ Detected errors —Displays the number of bit errors detected by the error checking
circuitry.
■ BER —Displays the bit error rate of the interface.
■ PLL lock —Displays Yes if the SDI PLL is locked.
■ Pattern sync —Displays Yes if the receiver has detected the input data pattern.
■ Start— Starts the PRBS data test and begins to monitor and update screen with
live test results.
■ Stop —Stops the PRBS data test.
■ Insert Error —Inserts an error into a data stream that is detected by the receiver
when in loopback using the included video cable.
With the Insert Error, there are differences among the three ports:
SFP A —Inserts 4 errors at 1 click due to 4 test blocks control.
SFP B —Inserts 3 errors at 1 click due to 3 test blocks control.
SMA —Inserts 1 error at 1 click.
■ Clear —Clears the Detected errors counter.
■ PMA Setting —Opens the PMA settings window that allows for adjusting the
analog transceiver settings, such as output voltage, loopback settings, and
equalization.
The following settings are available for analysis:
■ Serial Loopback —Routes the selected TX output signal back to the RX input
signal on-chip to verify operation without using an external loopback board.
■ VOD —Specifies the voltage output differential of the transmitter buffer.
■ Pre-emphasis tap
■ Pre —Specifies the amount of pre-emphasis on the pre-tap of the transmitter
buffer.
■ First post —Specifies the amount of pre-emphasis on the first post tap of the
transmitter buffer.
■ Second post —Specifies the amount of pre-emphasis on the second post tap
of the transmitter buffer.
■ Equalizer —Specifies the setting for the receiver equalizer.
■ DC gain —Specifies the DC portion of the receiver equalizer.
■ PRBS —Selects the transmit pattern and sets the receive error detection
circuitry to expect the same pattern for use in loopback testing.