Re: LPF Control Board addressing help
¿ªÔÆÌåÓýThe LPF control cable connects to the ¡°BANDS¡± connector on the MAIN board, J12¡. and to the ¡°BANDS¡± connector on the LPF Control board J21.? ?It should be on on WIRE2 at hex address x25 which is ¡°101¡±¡ or JP1 and JP3 open, and JP2 closed.? Address x28 on WIRE2 is the AD7991 A/D for the power/ swr.? Have a look here: ? ? So if you are not getting a response at x25, then something is up with U15¡ the MCP23017 multiplexer¡ ? ? Dr. William J. Schmidt - K9HZ J62K(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@... ? ? From: [email protected] <[email protected]> On Behalf Of Robert Luken W3RDL via groups.io
Sent: Wednesday, April 23, 2025 1:41 PM To: [email protected] Subject: [SoftwareControlledHamRadio] LPF Control Board addressing help ? Finished building the LPF Control board, no detectable shorts or opens and no smoke escaped. The board is configured for I2C addressing and the address jumpers are set for address "25"(Open, Short, Open). However address LPF not found at 25, running SDT Ver66-9. I ran I2C Scan and an address of "28" is showing up on wire 2. How is that possible? -- 73 Bob W3RDL ?
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