Control spi_sel_b on SDP-S and ADF4372 eval board?

Well in fact I want to use one SDP board to control 3 synthesizer trough SPI

Hi,

SPI_SEL_B is not connected to ADF4372 on the eval board. It is not possible to control multiple ADF4372 individually with one SDP-S.

If you want to set all boards to the same configuration (same frequency, output power, etc.) you may connect SPI lines of all boards to each other, and SDP-S can drive multiple boards together. You may need to replace 1.5kohm resistors on SPI lines with smaller values.

Regards, Kazim 

In that case will the ACE GUI software be able to control the synthesizers?

 Thanks

I do not see any problem with configuring the parts from ACE side, but not tested before. Probably the readback will not work. 

Plug the SDP-S to one of the boards (ACE will detect this one) and connect SCLK, SLEN, CSB and GND test points to the test points on the other boards with jumper cables. 

Regards, Kazim