Altera Arria V GX - Manual (Page 38)

6–16 Chapter 6: Board Test System
Using the Board Test System
Arria V GX Starter Kit November 2014 Altera Corporation
User Guide
Start
The Start control initiates the active port transaction performance analysis.
1 Always click Clear before Start.
Stop
The Stop control terminates transaction performance analysis.
PMA Setting
The PMA Setting button allows you to make changes to the PMA parameters that
affect the active transceiver interface. The following settings are available for analysis:
■ Serial Loopback —Routes signals between the receiver to the transmitter. Enter the
following values to enable the serial loopbacks:
0 = High speed serial transceiver signals to loopback on the board
1 = Serial loopback (internal loopback)
2 = Reverse serial loopback pre-CDR
4 = Reverse serial loopback post-CDR
■ VOD —Specifies the voltage output differential of the transmitter buffer.
■ Pre-emphasis tap
■ First post —Specifies the amount of pre-emphasis on the first post tap of the
transmitter buffer.
■ Equalizer —Specifies the setting for the receiver equalizer.
■ DC gain —Specifies the DC portion of the receiver equalizer.
Data Pattern
The Data Pattern control specifies the type of data contained in the transactions. The
following data types are available for analysis:
■ PRBS 7 —Selects pseudo-random 7-bit sequences.
■ PRBS 15 —Selects pseudo-random 15-bit sequences.
■ PRBS 23 —Selects pseudo-random 23-bit sequences.
■ PRBS 31 —Selects pseudo-random 31-bit sequences.
Error Control
The Error Control control displays data errors detected during analysis and allows
you to insert errors:
■ Detected errors —Displays the number of data errors detected in the hardware.
■ Inserted errors —Displays the number of errors inserted into the transmit data
stream.
■ Insert Error —Inserts a one-word error into the transmit data stream each time you
click the button. Insert Error is only enabled during transaction performance
analysis.
■ Clear —Resets the Detected errors and Inserted errors counters to zeros.