Re: Radio Astronomy Raspberry Pi image with GNU Radio 3.10.1

2022-02-25 Thread Robert McGwier
Great news On Friday, February 25, 2022, Glen Langston wrote: > Hello Aficionados, > > Franco Venturi has been busy cleaning up the Raspberry Pi Operating > system for use with Radio Astronomy. GnuRadio version 3.10.1.1 is > installed in the > Raspberry Pi operating system is now on the

Radio Astronomy Raspberry Pi image with GNU Radio 3.10.1

2022-02-25 Thread Glen Langston
Hello Aficionados, Franco Venturi has been busy cleaning up the Raspberry Pi Operating system for use with Radio Astronomy. GnuRadio version 3.10.1.1 is installed in the Raspberry Pi operating system is now on the cutting edge. The Operating system is now 64bit, which is supposed to increase

Re: Add tags without copying samples?

2022-02-25 Thread Marcus Müller
Forgot to add: propagating tags from all inputs to the output is the default tag propagation policy, so B has to do essentially nothing if it doesn't itself care for the tags. On 25.02.22 21:55, Marcus Müller wrote: Hi Thomas, sadly, within the GNU Radio 3.x framework, this isn't possible.

Re: Add tags without copying samples?

2022-02-25 Thread Marcus Müller
Hi Thomas, sadly, within the GNU Radio 3.x framework, this isn't possible. There's one possible "lower effort" solution. Assume you have this Source -> A -> B -> Sink where A is the block that currently needs to copy items just to add tags. We can now do Source --> B -> Sink \->

Job Opportunity -- RF Engineer in Long Island, NY

2022-02-25 Thread O'Connor, Paul
The Instrumentation Division at Brookhaven National Laboratory is expanding our RF programs, and we're looking for an engineer with a strong background who can support our efforts in radio astronomy, atmospheric radar, and accelerator diagnostics. Well-trained individuals at all levels will be

Re: Sudden signal jumps

2022-02-25 Thread Marcus D. Leech
On 2022-02-25 11:26, Zentarra, Michael wrote: Hello everyone, I was experimenting with two USRPs and encountered something I could not explain. The setup is: HostA -> B210 -> Cable+Attenuator -> N310 -> HostB. GNURadio on the TX side is simply playing a signal via the signal source block

Sudden signal jumps

2022-02-25 Thread Zentarra, Michael
Hello everyone, I was experimenting with two USRPs and encountered something I could not explain. The setup is: HostA -> B210 -> Cable+Attenuator -> N310 -> HostB. GNURadio on the TX side is simply playing a signal via the signal source block into the UHD USRP Sink. On the RX side the USRP

Add tags without copying samples?

2022-02-25 Thread Thomas Lorblanchès
Hi all, I have some custom blocks that do not change the samples but only add tags in the output stream. At very high sampling rates, all these "memcpy" operations to copy the input samples to the output stream take a lot of time and put a lot of memory pressure on the system, and are completly