We will soon have a two commercial radios with M17. We currently are calling them CS7000 M17 and CS7000 M17 PLUS. I will probably generate a blog about the radios in the near future and you are welcome to reproduce it in its entirety or part of it. You can go to www.csi-radios.com to look what is put on the website.
It is being implemented by one of the key developers of the M17 project. It is being financed by Connect Systems Inc.
Jerry - This is fantastic news! Congrats on having the first radios with M17 out of the box! I'm looking forward to seeing more details about the two radios. I'll mention anything you have online as of Friday morning in the upcoming issue of Zero Retries.
I didn't watch the video, but one big factor that determines whether it's safe to grab a broadcast tower is its height. If it's close to a quarter wavelength, the base is a high current, low voltage point. I don't recommend anyone try this, but in my young and stupid years as a college radio engineer we would grab the base of a quarter wave tower on our kilowatt AM broadcast station to show off to newbies. If I'd tried that with a half wave tower, the results would not have been pretty.
Just to reiterate, we did a lot of dangerously stupid things back then, like troubleshooting inside transmitters with the high voltage interlocks disabled. Luckily no one I knew ever got seriously hurt. But if anyone decides to try this stunt, remember that I told you it's a bad idea!
Jim - Thanks for your observations. I'll defer to your deep knowledge. I have a non-aggression policy towards live AM radio transmission towers, open but still powered up electrical panels, and standing in front of high power microwave dishes (though I didn't realize I violated this last one on the top floor of a skyscraper in Dallas that was a microwave hub... until I realized that my belt buckle was getting uncomfortably warm).
One of the innovations with the Codec 2 version of OFDM, is the addition of rows in the waveform. Instead of sending say 55 carriers requiring a large bandwidth, you can send smaller widths (for example 17 carriers in say 4 rows). FreeData is using a well tested and real-world waveform. Being written in Python and a browser interface is not my cup of tea however.
Hi Steve,
We will soon have a two commercial radios with M17. We currently are calling them CS7000 M17 and CS7000 M17 PLUS. I will probably generate a blog about the radios in the near future and you are welcome to reproduce it in its entirety or part of it. You can go to www.csi-radios.com to look what is put on the website.
It is being implemented by one of the key developers of the M17 project. It is being financed by Connect Systems Inc.
Best Regards,
Jerry
Jerry - This is fantastic news! Congrats on having the first radios with M17 out of the box! I'm looking forward to seeing more details about the two radios. I'll mention anything you have online as of Friday morning in the upcoming issue of Zero Retries.
I didn't watch the video, but one big factor that determines whether it's safe to grab a broadcast tower is its height. If it's close to a quarter wavelength, the base is a high current, low voltage point. I don't recommend anyone try this, but in my young and stupid years as a college radio engineer we would grab the base of a quarter wave tower on our kilowatt AM broadcast station to show off to newbies. If I'd tried that with a half wave tower, the results would not have been pretty.
Just to reiterate, we did a lot of dangerously stupid things back then, like troubleshooting inside transmitters with the high voltage interlocks disabled. Luckily no one I knew ever got seriously hurt. But if anyone decides to try this stunt, remember that I told you it's a bad idea!
Jim - Thanks for your observations. I'll defer to your deep knowledge. I have a non-aggression policy towards live AM radio transmission towers, open but still powered up electrical panels, and standing in front of high power microwave dishes (though I didn't realize I violated this last one on the top floor of a skyscraper in Dallas that was a microwave hub... until I realized that my belt buckle was getting uncomfortably warm).
One of the innovations with the Codec 2 version of OFDM, is the addition of rows in the waveform. Instead of sending say 55 carriers requiring a large bandwidth, you can send smaller widths (for example 17 carriers in say 4 rows). FreeData is using a well tested and real-world waveform. Being written in Python and a browser interface is not my cup of tea however.
Steve - Codec 2 is a gem, and it's cool that FreeDATA is now getting active support from the Codec 2 developers.