Forum: GNU Radio uhd transmitter receiver

Please i Need help. I am using USRPN210 and i use UHD source and sink. i 
madeflow-graphfor transmitter using signal source/fm modulator/ uhd 
sinkand for receiver using UHD source /fm Demodjusti wantto see the 
signal in RF aftermodulationand whenreceivingit. can anyone advise me or 
havetutorialsto do that in same flow graph or making delay 
betweentransmissionand receiving mode. or any think related to this 
topic.

You can use FFT sink block to see your signal.Just connect after your 
USRP
source block where you can see your received signal.

i didn't mention any port numbers in my grc file.U can still set up sink 
and
source blocks on the same grc file.since the usrp knows that sink is to
transmit and source block is to receive.

all you need to do is connect them and run the grc files.