TDC-GPX2 Standard Board
ams Eval Kit Manual
Page 9
[v1-00] 2016-Oct-20
Document Feedback
The first page, “REFCLK”, allows to select the reference input as well as the definition of the LSB.
REFCLK_DIVISIONS defines the LSB at the output interface as fraction of the reference clock
period. The most convenient way is applying an LSB of 1ps by configuring REFCLK_DIVISIONS to
the picosecond value of the reference clock period.
In the middle section the user selects between CMOS and LVDS.
At the bottom, visible on all tabulators, is the numerical display of the measurement results STOP1
to STOP2. In addition, the software allows to calculate the difference between two stop results. The
select box “Math” defines the formula:
Calculation Formula:
On: [STOP1 - STOP2]
Off: [REFNO1 - REFNO2] * REFCLK_DIV [STOP1 - STOP2]
Various software filters, sinc or median, can be applied.
4.2
STOP Page
This page is for the PIN and HIT enable selection as well as the high resolution and combined
channel settings.
Figure 6: STOP Page
