[amsat-bb] Band designators, Modes
Edson W. R. Pereira
ewpereira at gmail.com
Tue Jul 5 18:24:34 UTC 2016
I agree with Art and Ray. We should just use the frequency or frequency
range when referring to a radio band. I have found myself at times having
to check which of the several standards (isn't it nice to have so many?) an
author used when referring to radio bands. It is much easier and clearer to
just refer a band by the frequency.
73, Edson PY2SDR
- We humans have the capability to do amazing things if we work together.
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On Tue, Jul 5, 2016 at 1:30 PM, RSoifer1--- via AMSAT-BB <amsat-bb at amsat.org
> We have been using the term "Mode K" to describe 21 MHz uplink/29 MHz
> downlink because that is what AMSAT called it when it first came into use
> 1987. Similarly, the terms "Mode A" and "Mode B" came into use in 1974
> because that is what the engineers who designed AMSAT-OSCAR 7 called
> them. AO-7
> actually has four modes: Mode C is a low-power version of Mode B, and Mode
> D is "transponder off." Then came Fuji-OSCAR 12 with Modes JA (analogue)
> and JD (digital), where "J" stood for "Japan." FCC even included the
> definitions of Modes A and B in the written tests of that era.
> This "ancient history" has probably served its purpose. Art is right:
> we'd do better to stick with the numbers.
> 73 Ray W2RS
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