Re: [Discuss-gnuradio] how to stop the top_block and restart signal transmission

[Guanbo]

Hi, Yan

I tried the similar python code as yours, as follows:

tb.start()
send_pkt("payload", eof=False)
print "before lock()"
tb.lock()
print "after lock()"
time.sleep(1)
print "before unlock()"
tb.unlock()
print "after unlock()"

I found out that, the last print is not showing up.

Do you have idea regarding to this issue?
Thanks






Yan Nie wrote:
> 
> 
> Hi Jason,
> 
> I really appreciate your help about the problem that I got. The info
> related to the GNURadio and the USRP that I'm using is listed in the
> following.
>> 
>> Please confirm that you just see the carrier, not your modulated
>> signal when using the lock()/unlock()
> 
> I checked the result of using lock()/unlock() by correlating the down
> converted signal with the Barker code, at the transmission pause interval,
> there is no correlation peak. Therefore, it turned out there is no code
> transmitted during the transmission pause interval. Is it a right way to
> test if there is Barker code transmitted during the transmission pause
> interval? Is lock/unlock working for completely turning off the signal
> transmission for 5ms? However, I'm sure when using lock/unlock method
> still gives at least carrier signal in the pausing interval, which is
> observed on the oscilloscope.
> 
>> 
>> Also, please tell us:
>> 
>> What version of GNUradio are you using?
> 
> The version of GNUradio that I'm using is GNURadio 3.2svn
> 
>> 
>> What hardware are you using? USRP?  which daughterboard?
> 
> I'm using USRP1 with LFTX daughterboard plug-in. (similarly, at the
> receiver side,USRP1 with LFRX plug-in is utilized. )
> 
>> 
>> Are you using UHD?
> 
> I'm not using UHD.
> 
> Thank you so much for all of your help!
> 
> Thanks,
> Yan
> 
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> 
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