I must design a system with 7 channel RX an 2 channel TX using chip AD9361, i used this chip with single channel and ZEDBOARD.
This project is only a prototype so i want use, if possible, FMCOMMS5 as base block .
The first problem is synchronize RF section, in single board there is a circuit with two ADG918,
but how can i sinchronize two board FMCOMMS5. ?
About REF CLOCK INPUT : can i use J301 with two copy of an external clock to give the "XTALN" to 2 board ?
Using two FMCOMMS5 i must give the LO clock to 4 chip, i can use the internal clock or i must use external clock ?
with external clock is correct using J302 to give an external clock matched on 4 channel ?
I design a board that mount two fmcomms5 and connect them to a board VPX .
This board can mount base oscillator and clock drive to LO section.
About calibration routine : the FMCOMMS5 use two ADG918 to calibration path, with two board fmcomms5
i need of more connection to calibrate the system.
Can i use an external circuit that use the RF out to realize calibration with same circuit used on board ?
Thank you in advance