Re: [Discuss-gnuradio] control of noutput_items by the user

Hi Zing Yu, to be fair, this problem is not what you asked for in your initial post. A couple of notes: - The output buffer does not have to be "full" in order for the scheduler to call the following downstream block. - Undeterministic latency is one inherent problem of GNU Radio - 200 ms seems

Re: [Discuss-gnuradio] control of noutput_items by the user

Hi Martin, >to be fair, this problem is not what you asked for in your initial post. You are right. I realized it only during my second post. Apologies for not being clear during the first time. >A couple of notes: >- The output buffer does not have to be "full" in order for the scheduler >to

Re: [Discuss-gnuradio] control of noutput_items by the user

>I have now split the above flowgraph into two separate flowgraphs as following: >uhd usrp source -> LPF -> my custom block_1 >my custom block 2 -> uhd usrp sink >where I have divided the functionality of my original custom block into custom >block 1 and custom block 2. >Now, when I relay the inf

[Discuss-gnuradio] Controlport now on next

Hi everyone, I just wanted to announce that I've pushed ControlPort onto the next branch (for more details on ControlPort, see this for now: http://www.trondeau.com/home/2012/11/18/public-release-of-controlport.html). A couple of notes. First, we've integrated ControlPort into gnuradio-core so th

Re: [Discuss-gnuradio] False Packets for benchmark TX/RX

I am using RFX900 (FLEX 900) and the VERT 900 Antennas Best Regards, -- Yahya Ezzeldin On Wed, Dec 5, 2012 at 3:36 AM, Marcus D. Leech wrote: > ** > On 12/04/2012 08:15 PM, Yahya Ezzeldin wrote: > > I tried offsetting the carrier frequency (playing at the RX side) but >

Re: [Discuss-gnuradio] False Packets for benchmark TX/RX

On 12/04/2012 08:39 PM, Yahya Ezzeldin wrote: I am using RFX900 (FLEX 900) and the VERT 900 Antennas Best Regards, -- Yahya Ezzeldin The RFX900 doesn't have analog TX gain setting -- you have to use the baseband magnitude exclusively to control RF output gain. Try dropping the amplitude to 0

Re: [Discuss-gnuradio] False Packets for benchmark TX/RX

On Tue, Dec 4, 2012 at 8:51 PM, Marcus D. Leech wrote: > ** > On 12/04/2012 08:39 PM, Yahya Ezzeldin wrote: > > I am using RFX900 (FLEX 900) and the VERT 900 Antennas > > Best Regards, > -- > Yahya Ezzeldin > > The RFX900 doesn't have analog TX gain setting -- you have to use the > baseband ma

[Discuss-gnuradio] SRRC pulse shaping question

Hello all, I have a question applying to everybody that have tried transmitting symbols in different kinds of modulation (BPSK, QPSK, GMSK etc). I am using the following configuration in GNU Radio ( random source block -> bytes to symbols -> SRRC block -> file sink) The attached figure plots the

Re: [Discuss-gnuradio] SRRC pulse shaping question

Have you taken into account the group delay of the filter? How long is your filter? Try sending zeroes at the end to flush your filter state? Brian On Tue, Dec 4, 2012 at 11:35 PM, George Sklivanitis < george.sklivani...@gmail.com> wrote: > Hello all, > > I have a question applying to everybo

Re: [Discuss-gnuradio] SRRC pulse shaping question

The filter is consisted of 55 taps. I tried by sending zeros. Though zeros are interpreted in -1's from the modulation mapping block. Moreover, the zeros will be taken into account as symbols to be shaped, therefore, the same thing will happen. -George On 12/5/12 12:07 AM, Brian Padalino wrot

Re: [Discuss-gnuradio] SRRC pulse shaping question

You'll need to figure out how to flush the filter state and send actual 0+0j samples through. Maybe you can set a flag and multiply the samples coming out by 1 or 0 depending if you are flushing or not? Brian On Wed, Dec 5, 2012 at 12:11 AM, George Sklivanitis < george.sklivani...@gmail.com> wr

Re: [Discuss-gnuradio] SRRC pulse shaping question

I think this means creating a new block as I cannot come up with a quick way of implementing the above. In any case, thanks much. -George On 12/5/12 12:27 AM, Brian Padalino wrote: You'll need to figure out how to flush the filter state and send actual 0+0j samples through. Maybe you can set