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
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
Hi,
Do you see SDP connector connected message as given below example?
Regards,
Kudret
Hi,
Yeah, on my control screen, as on yours.
When i input 4000M and 6000M, the spectrum analyzer shows no change.
As shown in the figure below.
Hi,
Yeah, On my control screen, it's the same as yours.
When i input 6000M and 4000M, that's what the spectrum shows.
Hi,
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.
Kudret
Hi,
I did as you said, and when i input Dvdd in MUXOUT, the LED is on. So it's probably not a connection problem.
Zsq
Thanks.
Can you also probe the crystal oscillator output to see if there is 122.88 MHz output?
Kudret
Hi,
The adf4355 has only two outlets, A and B. How can I probe the crystal oscillator's 122.88MHZ output?
Do I output 122.8MHZ directly at the VCOout?
Zsq
You can connect an oscilloscope probe to TP1 or TP2; or an SMA cable to REFINA or REFINB connectors to check the output of crystal.
Kudret
Hi,
I did as you said, I use an SMA cable to REFINA, I can get a signal of about 122.4Mhz.
As shown in the figure below.
Is there any modification on your board? Can you verify all the below components are assembled on the board?
Kudret