I have acquired a device that includes an ADF4158, but there's no configuration example. I'm trying to come up with minimally effective settings. I believe SPI programming is working because I was able to turn the MUX output on and off switching between vcc and gnd. I could never produce a sawtooth wave on the output, though.
Here's the configuration I've come up with. Hoping someone experienced might spot some glaring mistake (written backwards during programming, R7 to R0):
R0: 0xb0320000
R1: 0x00000001
R2: 0x07010022
R3: 0x00000003
R4: 0x00000204
R5a: 0x0000000d
R5b: 0x00800005
R6a: 0x00004006
R6b: 0x00800006
R7: 0x00000007
We are trying to control a VCO from 24GHz to 24.25GHz in 1ms ramps. The VCO has a 1:16 divider. The reference is 30MHz, which is divided by 15MHz.
Main settings are then R=2, INT=100, CLK1=4, deviationword=1, stepword=4096. Does that sound feasible? It should drive the output from 1.5GHz to 1.515GHz if my understanding is correct (15MHz * 100 to 15MHz * 101)
I downloaded the PLL simulation software but I never got any result there that seemed correct. I still have a lot to learn about the topic. Is there anywhere I can find an example somewhat similar to mine?
