Re: [tracker2] T2-135 V1.1 Modification Approach
- 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.
> 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.
> de JA5AEA