Intel Agilex I Series - Page 30

PMA Setting
PMA allows you to make changes to the PMA parameters that affect the active
transceiver interface. The following settings are available for analysis:
• Serial Loopback: Displays the signal status between the transmitter and the
receiver.
• VOD: Specifies the voltage output differential of the transmitter buffer.
• Pre-emphasis tap:
— Pre-tap 1: Specifies the amount of pre-emphasis on the first pre-tap of the
transmitter buffer.
— Pre-tap 2: Specifies the amount of pre-emphasis on the second pre-tap of the
transmitter buffer.
— Post-tap 1: Specifies the amount of pre-emphasis on the post-tap of the
transmitter buffer.
Figure 20. QSFPDD-PMA Setting
Data Type
The Data Type control specifies the type of data pattern contained in the transactions.
Select the following available data types for analysis:
• PRBS7: Pseudo-random 7-bit sequences.
• PRBS15: Pseudo-random 15-bit sequences.
• PRBS23: Pseudo-random 23-bit sequences.
• PRBS31: Pseudo-random 31-bit sequences (default).
• High_freq: Selects the highest frequency divided-by-2 data pattern 10101010.
• Low_freq: Selects the lowest frequency divided-by-33 data pattern.
4. Board Test System
683288 | 2022.09.22
Intel
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Agilex
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I-Series FPGA Development Kit User Guide
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