[amsat-bb] Re: Full Duplex?

[Bob- W7LRD]

It is just like a telephone conversation.  With little or no delay, however back in the days of AO-40 (sobsob), when it was way out there, the delay was very noticeable and listening to ones self you got a bit stuttering. 

73 Bob W7LRD 



----- Original Message -----


From: "David 4X1DG" <4x1dg at iarc.org> 
To: "Mike" <mikef1234 at buckeye-express.com>, amsat-bb at amsat.org 
Sent: Wednesday, July 27, 2011 5:51:26 AM 
Subject: [amsat-bb] Re: Full Duplex? 

Mike, 

It depends on the transceiver that you have. 
Essentially the up link and down link are using different bands, U and V for example. 
If you transmit on a V uplink your transmission is transmitted back on the downlink on a U frequency. 
If your transceiver is capable of duplex operation, you can hear your own transmission on the downlink 
with a delay that depends on the sat distance from your location. with today's leo sats, it is hardly noticeable.  The duplex in the sat communications means that you can transmit and receive simultaneously. 

Hope that that clarify. 

David, 4X1DG 
  ----- Original Message ----- 
  From: Mike 
  To: amsat-bb at amsat.org 
  Sent: Wednesday, July 27, 2011 3:25 PM 
  Subject: [amsat-bb] Full Duplex? 


  I'm having a difficult time of understanding the concept of Full Duplex. Can 
  anyone explain it to me? I have the ARRL satellite book, read about it in 
  there and Wikipedia. I still didn't understand how it works with a 
  transceiver setup like we use. 

   

         Mike   N8GBU 

   

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