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Re: DDS60 and RXTXv6.1

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  • ltj_designs
    The drawing did not come out the way I had expected. View the drawing in a fixed point font (Courier). +5v ... 100K ... DDS60--------- 0.1uf ----|---(JP1-2)---
    Message 1 of 3 , Mar 1, 2007
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      The drawing did not come out the way I had expected. View the drawing in a fixed point font (Courier). 


                               +5v
                                |
                                |
                               100K
                                |
       DDS60--------- 0.1uf ----|---(JP1-2)--- U5,pin3
                   |            |
                  47ohms       100K
                   |            |
       ____________|____________|___(JP1-4)___ gnd
       
       

       


      --- In softrock40@yahoogroups.com, "ltj_designs" <arm@...> wrote:
      >
      > Remove all jumpers from JP1. Connect the output of the DDS60 through
      > some thin coax (RG174) to JP1. Connect the shield of the coax to pin
      > 4 (ground). Connect the center conductor to a 47 ohm 1/8 W resistor
      > with the other side of the resistor to ground. Use a 0.1uf cap to
      > couple the center conductor to pin 2 of JP1 (the pin 3 clock input of
      > U5). Last, connect two 100K 1/8 w resistors to pin 2 of JP1: one
      > resistor goes to +5v and the other goes to ground.
      >
      > +5v
      > |
      > |
      > 100K
      > |
      > DDS60--------- 0.1uf ----|---(JP1-2)--- U5,pin3
      > | |
      > 47ohms 100K
      > | |
      > ____________|____________|___(JP1-4)___ gnd
      >
      >
      >
      >
      > Adjust the DDS60 output level about half way between full output and
      > the amount of drive necessary to just reliably get the receiver
      > section of the TXRX to work.
      >
      >
      > I am driving my DDS60 with a HC908 daughter board. I use a recently
      > updated version of the HC908VFO program (V2B). Works well, but would
      > like to see that program have a few more bells and whistles.
      >
      > Andy WA3LTJ
      >
      >
      > --- In softrock40@yahoogroups.com, "f4arj" f4arj@ wrote:
      > >
      > > Hello,
      > > someone tried to use the RXTX6.1 with the dds60 ?
      > > and how to connect them ?
      > > 73,
      > > F4ARJ Fred.
      > >
      >

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