Software Description
18
SNLU214A – July 2016 – Revised September 2019
Copyright © 2016–2019, Texas Instruments Incorporated
DS280DF810EVM User’s Guide
2.2.4.6
TX FIR/VOD
The TX FIR tab allows the user to configure the FIR tap settings for each of the retimer channels, to set
the output to specific voltage amplitude and/or realize specific transmit pre-cursor and post-cursor
equalization ratios.
Figure 17. TX FIR Tab
•
Upon landing on the TX FIR tab, the page will display the current decimal values and polarity for the
main-cursor, post-cursor and pre-cursor FIR taps.
•
In addition, the page also displays approximate values for the voltage output differential (VOD) and the
de-emphasis for both pre-cursor and post-cursor.
•
The user may adjust the FIR tap values, by clicking on the up/down arrows for each field. After
entering the desired value(s), the user can click on
Set Taps
to make the entries effective.
•
At any point the user can click on
Read Taps
.