The dual katalina EVB : fmcomms5-ebz which uses an external LO
source exceeding 12GHz, please confirm it is possible to feed the external LO by frequencies upto 12GHz (not as written in the past as limited to 8GHz)
AD9361 Reference Manual (UG-570) states (page 19):
The frequency applied when an External LO is used is 2× the desired RF LO frequency. The range of the EXT LO signal is from 140 MHz to 8 GHz, covering the RF tune frequency range of 70 MHz to 4 GHz.
I'm not sure where you got 12GHz from.
Moved to Linux Software Drivers.
is this external LO frequency 12Ghz vs 8Ghz a SW issue ? Not an H/W limitation?
Moved back to AD9361 Design Support.
This question is not SW related.
I wonder if the confusion is due to the optional ADF5355 that can go up to 13.6GHz? AD9361 still has the same limitation when it comes to maximum external LO frequency, 4GHz operating frequency.
I will see if I can add/update a note on the FMCOMMS5 schematic. (ADF5355 output range in this application is from 140MHz -> 8GHz).
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