> On 05/20/2013 11:41 PM, Sam mite wrote: > > Hi list, > > > > Today I was trying to run one of the examples that come with gr-uhd > > "tags_demo" to schedule my burst transmission . I have USRP N210. > RFX2400. > > linux; GNU C++ version 4.6.3; Boost_104601; UHD_003.005.000-26-gb65a3924 > > > > I want burst duration and idle duration of 0.012 and 1 seconds > > respectively. So, I tried following command > > > > ./tags_demo --burst 0.012 --idle 1 > > > > I observed that LED "A" on USRP flashes for very short period of time, > and > > that I think is right because of short burst duration 12ms indicating > > transmission, after 1 sec idle duration. Question I want to ask is even > if > > I kill the flow graph using Ctrl+C, LED "A" keeps on flashing with same > > behavior for some time and then finally stops. Why is that so? > > Most likely, many transmit bursts are queued up on the device. The > example code that produces timed bursts doesnt wait for particular user > control or feedback from rx packets, its just sending out samples w/ > burst tags -- which there is some finite amount of buffering upstream to > hold. > > Thanks for the reply, problem goes away if I set burst and idle duration to 1 second. A question. If I want not to transmit the samples/bursts that are coming during the idle duration, how can I do that? For example, transmit a single burst at time t1 for burst duration and then wait for time t2. The samples that are coming during wait time should never be transmitted. After idle duration a new burst of upcoming samples should be transmitted and so on. How should I go about it? Any pointers on this?
> > > > Also, LED "E" which was static while flow graph was running, blinks > > intermittently when flow graph has been stopped. But I think thats > normal. > > > > Thats ok, its just the ref lock light on a partially powered down > synthesizer. > > Cheers, > -josh > > > > > Regards, > > > > Sam > -- Sam
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