I am trying AD9364 custom design. My desire is to decrease minimum frequency input (my goal is 1MHZ ). To do this, there are two option. First, using upoconverter, others external LO. could you suggest any external LO generator which has range as possible as higher. Except these two method, is there any method to do it?
Yes, you can configure the LO till 47MHz, but the performance will not be guaranteed in that range. Performance will be guaranteed only above 70MHz as given in datasheet.
What is the LO frequency that you want to achieve?
Recommendation on external LO:
For detailed information on External LO see External LO section of UG-570.
Input amplitude is -3dBm to +3dBm (no greater than 6dBm).
The pin needs to be AC coupled
My goal of LO frequency range is from 1mhz to 35 mhz. I read all informations in UG-570 about external LO.
It is not possible to use the chip for such low frequencies even using external LO. As per datasheet, the minimum LO supported is 70MHz and that is true even for external LO. External LO can be used for a maximum of 4GHz.
There is a question about measurement of frequency under 70mhz in forum (it is https://ez.analog.com/wide-band-rf-transceivers/design-support/f/q-a/79811/ad9364-frequency-range ). your answer in question confused my head about lower frequency measurement.
You said in this question that AD9364 can measure lower than 70mhz with external PLL. I can use external PLL covering 1- 6000mhz. if I use this PLL, Can I measure lower frequency I desired. and also in this measurement, which problems can I encounter to measure lower frequency? Could you clarify this matter?