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I'm looking for information regarding allowed occupied bandwidth and maximum symbol rate for the following amateur satellite bands

  1. Amateur VHF (144 to 148 MHz) aka 2m-band
  2. Amateur UHF (430 to 440 MHz) aka 70cm-band
  3. Amateur S-band (2400 to 2450 MHz) aka 13cm-band

This information is needed for certification of a transceiver operating in amateur VHF, UHF, and S-band. The idea is to have the transceiver conforming to the RF requirements for all ITU regions.

Regards,

Moses.

Moses Browne Mwakyanjala
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    Under what jurisdiction? You might expect it to not matter because well, it's space, but international law is ... complicated. – Phil Frost - W8II Sep 03 '21 at 02:34
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    For ITU Regions 1, 2, and 3 (In case they is harmony in the countries within the same region) – Moses Browne Mwakyanjala Sep 03 '21 at 12:02
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    ITU regions 1, 2, and 3 is the entire world. Can you be more specific? ITU regions don't pass legislation, countries do. – Phil Frost - W8II Sep 03 '21 at 12:42
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    Please edit your question to give us more specifics, something that we can work with. Are you looking for the lowest common denominator because you have an idea for a new mode? If you're asking for a summary of the laws regarding amateur radio and satellites of all the countries in the world, that's much too broad of a question. We're volunteers, but few of us are legal librarians. – rclocher3 Sep 09 '21 at 04:29
  • For interest see this modem for QO-100 featuring 32APSK at 2570 symbols/s, occupied bandwidth 2700 Hz, and a raw bitrate of 12593 bps. All while being no louder than the beacon. – tomnexus Sep 13 '21 at 19:40
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    I'm sorry, but you're asking for too much information for one question, so I'm closing it. – rclocher3 Sep 13 '21 at 20:10
  • @rclocher3 Could you at least suggest how the focus should be limited? Or perhaps comment on how the question should be framed. It’s more informative that way. – Moses Browne Mwakyanjala Sep 13 '21 at 20:45
  • Certainly, you could ask a separate question for each country. Unfortunately I don't think that we have many Asian hams here, but the US, Canada, and many European countries are represented reasonably well. – rclocher3 Sep 13 '21 at 20:52
  • Or you could ask it for your country. Your last name is similar to some friends of ours in an African country. Which country do you live in? Narrow your question down to that, etc. and your question could be reopened. :) – Mike Waters Sep 16 '21 at 23:57

1 Answers1

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The maximum rates for the US are as follows:

Frequency Rate
2 Meters 19.6k
70 cm 56k
>902MHz. None

You can find a reference from the FCC, a copy of the relevant section here, and another question related to this here.

rclocher3
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David Hoelzer
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    Sorry, I just realized I left off the bandwidth. It's documented in that same FCC reference. I'll update this with bandwidth tomorrow – David Hoelzer Sep 03 '21 at 00:20
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    Note that this applies for emitters within the US, I don't think it applies to anywhere else! – Marcus Müller Sep 03 '21 at 16:08
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    Absolutely true, though I think they are close. Perhaps someone with specific knowledge could add an answer or edit this one? – David Hoelzer Sep 03 '21 at 16:59
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    Wish I was authorative, but in lieu of anyone else: I think the symbol rate limit .... let's call it creative approach to regulation .... is a FCC-only thing; that would leave the world free to simply operate satellites at arbitrary rates as long as the bandwidths allow. (India might also be special, as they, I think, require satellite services you contact from Indian ground to be operated based in India...) This gets complicated pretty quickly, and I'm afraid a comprehensive list for all jurisdictions on this planet would exceed the scope of an answer. – Marcus Müller Sep 03 '21 at 17:10
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    I believe in ages past, FCC set the symbol rate to regulate bandwidth. Since then, we've come up with clever ways to get higher symbol rates in the same bandwidth (or narrower bandwidth for the same symbol rate), so the original regulation is now obsolete, but FCC has been hesitant to either add a bandwidth limit or fix the symbol rate, despite repeated requests. – user10489 Sep 03 '21 at 22:45