Altera Signal Integrity Development Kit, Stratix V GX Edition - Manual (Page 38)

6–18 Chapter 6: Board Test System
Using the Board Test System
Transceiver Signal Integrity Development Kit July 2012 Altera Corporation
Stratix V GX Edition User Guide
Port
The Port control allows you to specify the type of test to run on the Molex port. The
following Molex port tests are available:
■ Molex x1 Transceivers
■ aggressor 1 to 6 —If available, turning on an aggressor box will turn on the
adjacent aggressor channels adding switching noise to the victim channel to be
used for backplane 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.
■ 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.
Data Type
The Data type control specifies the type of data contained in the transactions. Select
the following available data types for analysis:
■ PRBS7 —pseudo-random 7-bit sequences (default)
■ PRBS15 —pseudo-random 15-bit sequences
■ PRBS23 —pseudo-random 23-bit sequences
■ PRBS31 —pseudo-random 31-bit sequences
■ HF1 —highest frequency divide-by-2 data pattern "10101010"
■ HF2 —next highest frequency divide-by-6 data pattern "111000111000"
■ HF3 —second lowest frequency divide-by-22 data pattern
■ LF —lowest frequency divide by 33 data pattern
1
Settings HF1, HF2, HF3, LF are for transmit observation only and are not
used in the receiver data detection circuitry.