[amsat-bb] Re: New Satellite Segment in IARU Region 2 Bandplan
g.shirville at btinternet.com
Wed Oct 23 01:27:55 PDT 2013
Please have a look at Footnote 1 at the bottom of the 2 metre bandplan:
"1 - Designers and operators of satellites using this section shall not transmit below 144,0025 MHz so that a necessary guard band is provided at the bottom band edge.”
This shows that it has been thought about and probably means that it could be used for a nominally 20kHz bandwidth transponder – so long as it has decent filtering on board which is relatively easy to achieve these days!
Of course there are very very few “empty spaces” in the 144-146MHz band and even fewer that have any sort of existing international alignment.
From: Greg D
Sent: Wednesday, October 23, 2013 7:07 AM
To: AMSAT BB
Subject: [amsat-bb] Re: New Satellite Segment in IARU Region 2 Bandplan
Interesting... Does anyone else find it odd (or possibly irresponsible)
to put a satellite allocation right up against the band edge. Didn't
they consider Doppler shift? That renders the lower 3+ khz of a 25 khz
slice unusable. Or is this only for NSS use?
> New Satellite Segment in IARU Region 2 Bandplan
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