[amsat-bb] Re: AO-40 Band Plan

["Drew Glasbrenner" <glasbrenner@xxxxxxxxxxxxxx>]

Considering the amount of CW vs SSB operation, and their related bandwidths,
this plan seems to favor CW quite a bit more than needed. Also, from my
limited experience, SSTV is normally found on the upper end of the FO
satellites (880-890).

Drew, KO4MA


> As with other amateur allocations, a band plan already exists for the
> orderly use of the space sections of the amateur bands and this is shown
> below for analogue transponders on present and future satellites. This
> plan will apply to all amateur spacecraft at all times, except when
special
> trans-satellite tests are being conducted.
>
>            ----------------Downlink Passband----------------
>                   CW              Mixed            SSB
>         LF                         Mode                           HF
>             5%    30%              30%             30%      5%
> Note:   (1)       (2)              (3)             (2)          (1)
>
> Notes: 1) Guard  areas  to  avoid  interference  to  beacons. These
>           frequencies are available for emergency and bulletin stations.
>        2) Rtty  and  sstv  are placed at the edge of the  cw  and  ssb
>           passbands;  conforming  to their use at hf where rtty is
present
>           within the cw space and sstv is transmitted in the ssb sub-band.
>        3) Mixed mode area. This is recommended for crystal  controlled
>           stations, dxpeditions, or those wishing to work both cw and ssb.
>


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