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ad9361 TX frequency switching

Question asked by sab123 on Apr 27, 2017
Latest reply on May 4, 2017 by mhennerich

Hi,

I want to switch ad9361 as fast as possible between two frequencies(868Mhz and 2.4GHz). So a chunk of data is transmitted on one frequency then null data is transmitted and then another chunk on another frequency.

What I have observed after coding was that when the frequency jump was 100 MHz or less(for example between 800MHz and 900MHz) then I can switch the frequencies. But as soon as the jump is bigger than 100MHz, the signal does not come out expectedly.

Does anyone know if this could be found out from the PLL specifications or in general the data sheet of ad9361 as to how fast the frequency switching can be, if the jump is greater than 100 MHz ?

Or are there any special callback functions that can switch between these 2 fixed frequencies. Because someone told me that its possible to have special configuration registers to help ad9361 PLL.

Best Regards,


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