Re: T41 receive attenuator working?
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That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation.? Now I'm on to calibration.? Thank you all for your help. dave, n3ds
The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to ¡°111¡± or no shorted jumpers (J15, J16, J17). ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? ? Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for -- make sure the address in software matches the address you set using the solder jumpers.
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