Hi John,
When I'm entering "40" in the EXCITATION FREQUENCY here is what i can observe :
(D7/D6)
(D5-D4)
(D3-D2)
(D1-D0)
-Blue signal is the CS (Test Point of the Eval-A2DS1210 board)
-Yellow signal is the TP of the output excitation of the Eval-AD2S1210)
- Green/Red signals are , from first to last picture, D7/D6, D5/D4, D3/D2 and D1/D0 , observed in the J4 connector (26 pins) of the Eval-AD2S1210 board, but also after the PI74ALVTC16245AE transcevier, located between J4 and the ASIC.
The 16th falling edge is the FCW, controlling the excitation frequency. ( 00 10 10 00= 0x28=40 here).
For the board set up, jumpers are linked as follow (p5/20 of the eval board datasheet) :
Thanks a lot for your help !
Emmanuel