On 12/03/2019 09:40 PM, Lukas Haase wrote:
Hi,
Am I not supposed to put USRP blocks within a hierarchichal block and if so,
why?
Very strange minimal example (Ettus USRP X310, Windows 10, gnuradio 3.7.13.5):
https://paste.pics/8a1cf2b2661fab2bc71b760e369997b9
Works and with a spectrum analyzer I see the tone at 916 MHz.
Then I do nothing more than putting the Signal Source and USRP Sink into a hier
block and using it:
https://paste.pics/8c7c200035a083e218625360defc8015
https://paste.pics/bcd7969f3299f54e56b0d3ca210d97af
It's hard to believe but true: The spectrum analyzer stays silent! It doesn't
output anything.
All messages on the console are same as well: The FPGA image gets loaded onto
the USRP and it starts.
For a brief moment at startup, the spectrum analyzer shows a small tone at
916MHz which disappears again.
Thanks,
Luke
Your gain is 0, that might have some bearing. Also, you should see the
main tone at 915M, because your baseband signal is at -1M.
