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Antenna selection #3
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Hey @ericek111, do you have any idea on this one? |
Looking at some PCB photos I found online and the binary API, I think the inputs are switched using a GPIO extender connected to the MSI.2500. I'm a little bit afraid that the other tuner would need to be initialized from scratch: https://www.sdrplay.com/wp-content/uploads/2018/05/RSPduo-Introduction-V3.pdf So, it seems you'd need to write
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Thanks a lot for the answer and sorry for the long delay, at the moment this is out of reach for me. I'd leave the issue open for posterity, but I can't pursue this any further right now. |
Do you have any pointers to MSI2500 documentation? The libmirisdr-5 code doesn't have any headers... and it just writes magic hex values into registers. The MSI001 is pretty well documented. I have a slightly different version of the msi-sdr, the frequency bands + tuning don't match the two existing "flavours" and I'd like to add support for it. I'm messing with it and keep running into awful frequency aliasing... I'm trying to grab 8 mhz samples to scan a large swath of RF space, but unless I choose a decent LO frequency it's a mess... I think I need to choose sample rate and LO frequency together to avoid as many aliased frequencies as possible... but the MSI2500 handles the sampling and it's not clear how to program it. Any advice or suggestions would be greatly appreciated! |
I own a SDRPlay RSPdx that features three antenna ports. The library here mostly works fine with a simple addition to the device list, but it is lacking the antenna selection feature, as far as I can tell.
Things I tested:
miri_fm
doesn't have an option for changing the antenna, same asmiri_sdr
This is my current output from the device probing command:
If you have any pointers how to make this a reality, it would be highly appreciated.
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