Re: Help on creating an intermittent beacon transmission using HackRF

2024-02-09 Thread Marcus Müller
Hi David! I'd be very lazy: just pad your pre-recorded signal with zeros, and play it on loop with the file source. Padding of files is easy, and essentially free in terms of storage space if your file system supports sparse files (and if you're on linux, yes, it almost certainly does).

Re: Help on creating an intermittent beacon transmission using HackRF

2024-02-08 Thread Adrian Musceac
> > Another possibility is to write your own source block which reads and stores > the samples in memory, then outputs them at a specified time until the > whole buffer is transmitted, then sleeps for a while and repeats. If you > need to control actual transmission time more precisely it can be

Re: Help on creating an intermittent beacon transmission using HackRF

2024-02-08 Thread Adrian Musceac
On Wednesday, 7 February 2024 21:03:11 EET Daniel Estévez wrote: > > Hi David, > > One possible solution would be to make a flowgraph that plays the file > once. Then make a bash script that loops, calling the flowgraph and then > sleeping for some time. > > Best, > Daniel. > Another

Re: Help on creating an intermittent beacon transmission using HackRF

2024-02-07 Thread Daniel Estévez
On 07/02/2024 17:09, David Barnhart wrote: Hi all:   I teach a course at USC on satellite ground communications that is a lab-based class. I would like to setup an intermittent transmission using a recorded beacon that we have used before (in cfile format) to have them practice “catching