Altera Stratix IV GT 100G - Manual (Page 40)

6–18 Chapter 6: Board Test System
Using the Board Test System
Stratix IV GT 100G Development Kit User Guide October 2010 Altera Corporation
f For more information on the CFP loopback board, refer to the user guide located in
the following directory:
<install dir>\kits\stratixIVGT_4sgt100g5_100g\board_design_files\cfp_loopback\
user_guide
.
The following sections describe the controls on the CFP tab.
Channel
The Channel control allows you to specify channel groups or all channels for analysis.
Start
The Start control initiates the loopback tests.
Stop
The Stop control terminates the loopback tests.
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 from the receiver to the transmitter.
■ 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 boost to incoming signals.
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 (default.)
■ 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 controls display data errors detected during analysis and allow you
to insert errors: