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Won't receive above 439.995

Posted: Wed Mar 04, 2020 12:53 am
by K9CZ
We are using it for a C4FM repeater. The openspot quit receiving the repeater transmitter after working for a few years. I did a factory reset plus FW upgrade and reprogrammed it but still have the same problem. It works fine in the 436-439.995 Mhz but seems to quit when going to 440 Mhz and above. Any ideas? Thanks K9CZ

Re: Won't receive above 439.995

Posted: Wed Mar 04, 2020 7:28 am
by HA2NON
Please check antenna connections or try replacing the antenna, and also if the Modem is in C4FM Half Deviation mode, re-run C4FM Half Deviation AutoCal, or manually adjust the C4FM Half Deviation demode mode on the Modem page for the lowest BER.

Re: Won't receive above 439.995

Posted: Thu Mar 19, 2020 1:17 am
by K9CZ
Do you really think the antenna connection would quit a just a few cycles? No we are not in half duplex.

Re: Won't receive above 439.995

Posted: Thu Mar 19, 2020 8:01 am
by HA2NON
Try increasing/decreasing the RX frequency in 100Hz steps around the RX frequency you want to use.