I use the adf4355 board, download the corresponding software and driver according to the instructions, and change the frequency I want to output on the control panel. But no matter how I adjust, the output frequency is a value can not be changed
First of all, I want to make sure SPI communication is okay. Can you select the MUXOUT pin output from Register 4 as Dvdd and write to the Register 4. LED that is connected to MUXOUT should turn-on. IF not, there might be a problem with the SDP-S connector.
I'm a little confused. Do I have to press button one every time? When I could not change the output frequency before, I pressed it, and the signal would not show on the spectrum instrument. I had to turn off the board and open it again, and then press button 2 to show the signal on the spectrum instrument.
I just tried it again. When my board switch is not on, I press button 1 and turn on the board switch. The output is the same value as before. When I turn the board on, I press button 1, no matter how much I change the value in VCOout, I can't get a signal out, I had to turn the board off and back on to get the signal out.