F-Tile Architecture and PMA and FEC Direct PHY IP User Guide

ID 683872
Date 9/29/2025
Public
Document Table of Contents

A.6.3.2. F-Tile FGT Transmitter Setting Recommendations

The recommended TX equalization settings are shown as a reference point so that you can narrow your sweeping range of each TX equalization tap. These settings are found based on the figure of merit, such as BER measurement and eye height value using the F-Tile FGT Hardware Setup You can download the TX equalization sweeping scripts from the example designs provided in F-Tile FGT Tuning Examples .

Table 125.  F-Tile FGT Transmitter Equalization Setting RecommendationsFor Agilex™ 7 F-Tile production devices with OPNs mentioned in Appendix A.1
Insertion Loss Data Rate <= 17Gbps Data Rate > 17Gbps QSF Assignment or Quartus® Prime Setting
0 < IL <= 10dB

main_tap = 55

pre_tap_1 = 0

pre_tap_2 = 0

post_tap_1 = 0

main_tap = 55

pre_tap_1 = 0

pre_tap_2 = 0

post_tap_1 = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_LOW_LO
SS" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_LOW_LOSS in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.
10dB < IL <= 20dB

main_tap = 55

pre_tap_1 = 5

pre_tap_2 = 0

post_tap_1 = 0

main_tap = 55

pre_tap_1 = 5

pre_tap_2 = 0

post_tap_1 = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_DISABLE" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_DISABLE in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.
20dB < IL <= 30dB

main_tap = 55

pre_tap_1 = 5

pre_tap_2 = 0

post_tap_1 = 5

main_tap = 55

pre_tap_1 = 10

pre_tap_2 = 2

post_tap_1 = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_DISABLE" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_DISABLE in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.
Table 126.  Non-F-Tile (Link Partner) Transmitter Equalization Setting Recommendations
Insertion Loss Data Rate <= 17Gbps Data Rate > 17Gbps QSF Assignment or Quartus® Prime Setting
0 < IL <= 10dB

C(0) = 1

C(-1) = 0

C(-2) = 0

C(1) = 0

C(0) = 1

C(-1) = 0

C(-2) = 0

C(1) = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_LOW_LO
SS" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_LOW_LOSS in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.
10dB < IL <= 20dB

C(0) = 0.9

C(-1) = 0.1

C(-2) = 0

C(1) = 0

C(0) = 0.9

C(-1) = 0.1

C(-2) = 0

C(1) = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_DISABLE" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_DISABLE in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.
20dB < IL <= 30dB

C(0) = 0.82

C(-1) = 0.1

C(-2) = 0

C(1) = 0.1

C(0) = 0.79

C(-1) = 0.18

C(-2) = 0.03

C(1) = 0

set_instance_assignment -name
HSSI_PARAMETER
"vsr_mode=VSR_MODE_DISABLE" -to <RX_SERIAL_PIN> -entity
<TOP_LEVEL_NAME>
OR select VSR_MODE_DISABLE in the Analog Parameters tab in the Quartus® Prime IP Parameter Editor.