[amsat-bb] Band designators, Modes

Arthur Feller afeller at ieee.org
Mon Jul 4 22:18:53 UTC 2016

Interesting chart, Peter.  

ITU and FCC, at one time, decided never to use these LETTER destination in favor of frequencies by the numbers.  The numbers need no interpretation or qualification.  AMSAT should go the simple route!  Stick to the numbers, which EVERYONE understands.

73, art…..
W4ART  Arlington VA

> On 4-Jul-2016, at 03:59 PM, Peter Laws <plaws0 at gmail.com> wrote:
> I thought AMSAT was moving away from Modes A, B, J, etc, but they seem
> too entrenched and still appear in current pubs.  Regardless, the band
> designations, loosely based on microwave band designators (later
> "codified" by IEEE), were for whatever reason interesting to me so I
> made a chart.  It started out as just the microwaves ... then I added
> the satellite stuff ... then I added the stuff that is microwave, but
> non-amateur/non-satellite but in the same neighborhood.
> It's mostly microwave-centric but I put all the FCC bands designated
> for space station use in there, too, and as some of you know, that
> goes down as low as 40 m (which is *not* microwave :-) ).
> Anyway, the only "name space collision" between AMSAT designators and
> IEEE designators is the AMSAT R band (47000 - 47200 MHz), which is
> part of the IEEE V band (40000 - 75000 MHz).  That happens because
> AMSAT's V band is 144 - 146 MHz.
> The only other anomaly is that we amateurs have two allocations within
> the what the IEEE calls the S-band (2000 - 4000 MHz), which are 2400 -
> 2450 MHz (13 cm) and 3400 - 3410 MHz (9 cm) -- both ham bands are
> wider but these are the FCC space station allocations.  I've seen the
> amateur allocation at 9 cm referred to as "S2" but I don't know how
> official that is.
> https://docs.google.com/spreadsheets/d/1oJV0Bv24mHhq_eICUp3L6g4pTy-wItUWfkyT-Uf5z0g/edit?usp=sharing
> Anyway, I keep stumbling on allocations that seem relevant so I keep
> adding them.  I need to add the historical notes, too, like where the
> K and X letters came from as well as the
> "hopefully-but-not-quite-yet-obsolete" satellite mode designators.
> Some of that info is linked to the page.
> Looking forward to the Mode CX satellites ...
> -- 
> Peter Laws | N5UWY | plaws plaws net | Travel by Train!
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