I am trying to receive the packets at two different frequencies.I can
definitely see some data in the file sinks i used.But,the problem is
each
file sink shows a certain number of packets only.For example,if [email protected]
receives packets 22,23,24,[email protected] receives packets 25,27.As you can
see
that 26th packet is missing and might have been dropped.Each antenna is
separating the continuous flow of packets and no duplicity of packets is
formed.Can someone explain why is this happening?!And what can i do to
get
rid of this and receive all the packets individually on each
antenna(like [email protected] receives 21,22,23,24 and [email protected] also received 21,22,23,24).
If i am unclear with the question,please do let me know.
receives packets 22,23,24,[email protected] receives packets 25,27.As you can see
When asking this type of questions, it’s best to actually attach your
flow-graph, or a pointer to a pastebin of your flow-graph, and give DETAILS
of your hardware setup. What type of USRP? How many and what type
of daughtercards, etc…
–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
using Volk machine: ssse3_64
– Opening a USRP1 device…
– Using FPGA clock rate of 64.000000MHz…
Traceback (most recent call last):
File “/home/gnuradio/grc/Project/relays/top_block.py”, line 126, in
tb = top_block()
File “/home/gnuradio/grc/Project/relays/top_block.py”, line 62, in init
self.uhd_usrp_source_0.set_center_freq(900e6, 1)
File
“/usr/local/lib/python2.7/dist-packages/gnuradio/uhd/uhd_swig.py”,
line 1879, in set_center_freq
return _uhd_swig.uhd_usrp_source_sptr_set_center_freq(self, *args)
RuntimeError: vector::_M_range_check
Done
we just tried using single USRP source but we got the error which is
shown
above,Is it possible to use a single usrp and single daughter-board at
different frequencies and receive the signal. final_msg_rx.grc http://gnuradio.4.n7.nabble.com/file/n41518/final_msg_rx.grc
for your reference the GRC file is attached
So, to clarify, you have a SINGLE USRP1, a SINGLE RFX900?
You flow-graph uses two independant UHD sources, which won’t work. You
need a single UHD source, configured for two output channels,
and use the dual-DDC mode to extract your two frequencies (which, by
the way, are far enough apart that this will barely work).
–
Marcus L.
Principal Investigator
Shirleys Bay Radio Astronomy Consortium http://www.sbrac.org
It does not give me any error but there is no output at all. We have
attached
FFT as shown in the GRC file 51.png http://gnuradio.4.n7.nabble.com/file/n41523/51.png Here attached the
screen shot of the FFT plot
