[MVMA] Recent upgrade DARA <> MVHS 13.5 miles
Moe
ab8xa at arrl.net
Wed Nov 28 21:20:39 EST 2018
On 11/28/18 1:42 PM, Chuck Gelm wrote:
> Chuc... We need to now move on the upgrade on MVHs/DARA link... Let's
> finish this then move to the next item on our list. Let's get it done
> asap.
>> Regards
>
> Reuben:
>
> I do not understand 'upgrade'.
> What needs an 'upgrade' ?
>
The problem is the reflected NSM5 at MVHS has low S/N ratio and that
gets worse as its channel of operation moves higher in the band. That is
not the case with the AGM5 at DARA. It is also not a problem with the
AGM5 at MVHS.
Per Bill's recommendation, I hope to swap the AGM5 and NSM5 at MVHS at
the earliest weather opportunity. The MVHS AGM5 is now aimed uselessly
at the W Xenia NSM5 which is aimed at Bill (north 60 degrees), not back
at MVHS.
That should bring both nodes' S/N up enough to see 9.5 Mb/s or so at 10
MHz, as well as to operate them at 20 MHz bandwidth, where the rate is
19+ Mb/s. *I've seen that in testing*.
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