Thanks for the detailed explanation Don. It seems like that is what is happening, the OM2500 may be sending info back on the line into the "Y" connector, confusing Na3P on the computer end on making the OM2500 jump frequency rapidly back and forth between the correct frequency and the out-of-band phantom frequency. From the responses, there may be 3 possible solutions:
(1) I read N8LP's comment under a different thread heading than this one. I am using his LP-Bridge program and LP-Pan hardware. Larry said that I could use one of the extra serial ports in LP-Bridge to send data to the OM2500A. I think that will work if I put a Serial to USB converter coming out of the RS232 port on the OM2500A going back to a USB port on the computer. (2) If all else fails, I have used DDUTILl in the past to talk to the OM2500A using the CI-V format into the CI-V port of the OM2500A. I don't really want to use two virtual serial port programs (DDUTIL and LP-Bridge), but I might have to try that. (3) I will email OM Power to ask if I can put the OM2500A into "passive listener" mode only. I thought that I might be able to accomplish the same thing by removing the wire in the DB-9 cable that would carry signals from the OM2500A back to the "Y connector, thereby making it a "passive listener" by default. If you look at the K3S DB-9 wire definitions in the manual, one of the wires is RX and one is TX. I was thinking that if I removed the Line 3 TXD OUT pin from the cable going to the OM2500A, any signals coming from the OM2500A would never get back to the "Y" connector to confuse the computer that is listening on the same line. On page 18 of the manual there is a table of the DB-9 pin-out. Although the names of the pins seem counter-intuitive to me..... Pin 2 (RXD IN) is used to _SEND_ data from the K3 _TO_ the PC and the OM2500A. Pin 3 (TXD OUT) is used to _RECEIVE_ data _FROM_ the PC or the OM2500A. I'm thinking that removal of Pin 3 from the side of the "Y" splitter that goes to the OM2500A will allow the OM2500A to _RECEIVE_ signals from the K3S/PC _BUT NOT SEND_ signals to the K3S/PC. Does that make sense? Would like to receive comments on these three possibilities. Thanks for all who responded. Charles K5UA ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
