[amsat-bb] Full Duplex on the LEOs

[Stan <stan@xxxxxxxxxxx>]

Hello the Net:

Full duplex is a very nice capability to have for both the new and the 
experienced satellite operator.

Full duplex allows the operator to hear themselves thru the satellite to 
verify their performance and
allows antenna pointing, if needed.
Hearing yourself on the downlink lets you know if your part of the QSO 
was successful.

Full duplex operation gives you the confirmation that your equipment is 
working and your techniques are successful.
Simplex operation may leave the question as to if you really got up to 
and thru the satellite.

Usually a set of earphones (headphones) is needed to eliminate feedback 
that is present between the microphone and the speaker.

NO, full duplex is not an absolute requirement, but it makes for more 
enjoyable and efficient QSOs.

Full duplex permits an very acceptable level of operator etiquette that 
simplex operation denies.

The round trip time delays are hardly detectable with the low earth 
orbiting (LEO)  satellite.
On the higher satellites, full duplex operation can be a distraction 
because of the very noticeable time delay,
from you , up to and thru the satellite, then back down to you.

Stan, Wa1ECF




Gary Persons wrote:

> Playing devil's advocate here.
> Is full duplex REALLY necessary while working the LEO birds?
>
> *___________________*
>
> God Bless America!
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