I was informed recently that some radio amateurs in Europe will be experimenting with ATV on the 10-metre band in the Summer of 2022. It is likely to be mostly confined mainly to stations in England, the Netherlands and Germany.
While ATV (Amateur TV) is normally associated with the 70cms and 23 cms bands, there have been experiments in recent years on 146 MHz, 71 MHz and 51.7 MHz. This new experiment on 29 MHz will allow much more use of Sporadic-E propagation for contacts.
From what I understand, it will be DVB-T digital TV operating on 29.250 MHz with a 300 kHz bandwidth. This is below the input frequencies of the various FM repeaters around Europe.
I am told that the numbers involved are likely to be small with perhaps something like 20-30 stations taking part. Special boards are being developed at present and no doubt, these will be be got ready for the Sporadic-E season next May.
The photo at the top of the post is of an ATV signal on 10m that was upconverted to 149.250 MHz.
4 comments:
In the early sixties, there was talk of medium scan TV, can't remember the exact term. There was an article in 73 magazine. Or maybe it was a decade later, easdier to do with digital ICs.
The idea was faster updates than slow scan, but a smaller bandwidth. I'm thinking 2MHz at the top of 6M.
But a quick check shows a 1974 article about OSCAR 7 mentioning a faster sstv, just scale up by four. Apparently work had already been done on it, in the SSTV Handbook from 73.
The suggested frequency for DATV operation would cause interference to the Amateur Satellite Service allocation at 29.300-29.510 MHz
I wonder what SDR software supports DVB-T, I've used Angel but that only has -S. Given it supports an RTL-SDR which by its nature is a DVB-T RX you'd think there'd be a simple solution to this.
Was this upconverted to bring it into range of a hardware receiver?
I've got a MyGica DVB-T2 Dongle that is supported in Crazyscan, I'll have to set it up and see what the lower limit is but I suspect somewhere around 48MHz.
Keep us informed of any developments of this one please John, or any links to forums where it's being discused as I'm very keen to get involved for next season.
Paul PUV
Do you have a source for this information? As the ITU regulations define 7 kHz bandwidth as maximum for this band you need kind of a special agreement. Who will be able to get this agreement? Under which conditions and regulations?
Thanks in advance for any insights
Emil / DD3AH
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