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Re: [tracker2] T2-135 V1.1 Modification Approach

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  • Scott Miller
    Hi Take, If I remember correctly, the problem is that when data mode is enabled on the radio, the 1200 baud signal is disconnected. The 9600 baud signal was
    Message 1 of 2 , May 19, 2010
      Hi Take,

      If I remember correctly, the problem is that when data mode is enabled
      on the radio, the 1200 baud signal is disconnected. The 9600 baud
      signal was the only one available.

      Scott

      Takehiko wrote:
      >
      >
      > Scott,
      >
      > I have one v1.1 board and I am looking into this thread to understand
      > the problem and the approach you did to fix the issues with v1.2 and I
      > am wondering why you did not simply change the input signal from P3
      > (AFIN) to P9 (SPO) of CN2, not adding duplicated additional filter on
      > T2-135 board.
      >
      > According to DR-135 service manual, P9 (SPO) is called as VLI and it
      > provides 1200bps decoding signal with 300mV. It is actually pin 4 of
      > DR-135 D-SUB connector for external TNC connection.
      >
      > I am happy to hear your explanation to improve my v1.1 board receiver
      > performance when I use it.
      >
      > Regards,
      >
      > take
      >
      > de JA5AEA
      >
      >
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