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analogdevicesinc / libad9361-iio

IIO AD9361 library for filter design and handling, multi-chip sync, etc.
http://analogdevicesinc.github.io/libad9361-iio/
GNU Lesser General Public License v2.1
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MAX_FIR twice the max baseband rate? #11

Open mhennerich opened 6 years ago

mhennerich commented 6 years ago

https://github.com/analogdevicesinc/libad9361-iio/blob/93d4a2286dc599f6c73c7310257ef5b67f25bc38/ad9361_calculate_rf_clock_chain.c#L22

tfcollins commented 6 years ago

From here: https://github.com/analogdevicesinc/ad936x-filter-wizard/blob/ca68f7d0b041f59fd117a7f55ac05b7f1edfd8ff/rate_bounds.m#L11

I think the comment is just wrong

rgetz commented 6 years ago

but that means you can never use FIR which is *4? That doesn't make sense.

tfcollins commented 6 years ago

It means that the input to the FIR (on the RX side) cannot exceed 2*61.44MHz

mhennerich commented 6 years ago

That‘s outdated corrected stuff from the old manual where BB rates of 122.88 were valid in 1rx1tx mode. We need to fix that here too