Other Parts Discussed in Thread: DAC3484, CDCE62005, , DAC3482
I recent purchased a brand new DAC3482EVM and TSW1400 directly from TI. My first attempt was to follow the setup directions in EVM User manual in the Section: "Basic Test Procedure with TSW1400". But after much work, it is clear that I can not reliable control the registers in the CDCE62005. Loading the specified example file "DAC3484_FDAC_1228p8MHz_4xint_NCO_30MHz_QMCon.txt" does not produce the desired register values. So I tried to manually enter them and it is impossible to get reliable results. However, after a power cycle, I was able to see a ~125 MHz output from Y4 output, which is expected and sometimes I can et the an output on Y4 which is a divided version of my primary clock (1228.8 GHz) (as per the example instructions). But it is impossible to do anything reliably with the GUI. As an example, If I follow the direction in the user manual precisely, in step 3.4.5 when I'm told to load the register file, initially all registers to go zero
If I do read-all, I get this:
At that point, if I try to change the source for Y4 to secondary, it just reverts back to primary
I tried to usual hardware debugging steps. Voltage is correct, my clock is OK. I tried configuring the board connected to the TSW1400 and not connected. Always the same result. I seems like the SPI communications to the CDCE62005 is unreliable. Any help would be appreciated!