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4 rxports 1 tx port

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  • ah.v.schaijk@mindef.nl
    Hello all, I could use some input on the effects off the following setup: Ports 1 to 3 recieve 1k2 on 2 m (different frequenties) and tx on port 4 Port 4
    Message 1 of 1 , May 25, 2011
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      Hello all,
       
      I could use some input on the effects off the following setup:
      Ports 1 to 3 recieve 1k2 on 2 m (different frequenties) and tx on port 4
      Port 4 recieves 9k6 on 2m and tx on 9k6 70cm
       
      Users for port 1 to 3 need to use 2 tncs a 1k2 tnc getting txd from the pc connected to a trx on 2m with dcd active (simplex mode) and a 9k6 tnc only recieving sending the rxd to the pc
      Users on port 4 just use one tnc in fullduplex with a 2 meter transmitter and 70cm reciever
       
       
      For port 1 to 3 the situation would be no worse then simplex as far as the hidden node effect goes, it probably would be better because all trafic should be with the node and that is transmitting on another frequentie so they don't have to wait for that.
      However port 4 would be a pure aloha input, how likely would it be that 2 stations will be transmitting at the same time if they are both connected to the same node, in other words does BPQ32 poll and transmit data for several users at the same time (interleaved) or will it first transmit for one station, wait for the reply and then deal with the next station?
       
      73 de Andre PE1RDW
      A.H. (André) van Schaijk
      Tekenaar Keniscentrum Start- en Rolbanen
      .........................................................................
      Ministerie van Defensie
      Dienst vastgoed defensie
      directie Zuid, Terreintechniek
      Spoorlaan 175 l 5038 CB l TILBURG l 5.33
      Postbus 412 l 5000 AK l TILBURG l MPC 71D
      .........................................................................
      MDTN *06 155 79 46
      T +3113 511 79 46
      F +3113 511 79 99
      ah.v.schaijk@...
       
       
       

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