I had a strange situation yesterday while running on 2m eme.
I use a sw program called MAP65 which uses JT65 for Tx/Rx. MAP65 allows one to watch a wide bandspan up to 90-KHz (similar to a panadaptor). To operate VFO-A is set to the middle frequency of the span one wants to observe and one clicks the waterfall display to chose a particular frequency to operate on. In order to transmit there one has to operate split mode so VFO-B controls the Tx. All fine so far, but...
Yesterday when I attempted to operate in split mode my actual transmit frequency was +1.5 KHz from what the dial on VFO-B showed?? Turning off split and frequency transmitted was what was shown on VFO-A (which is normal). I have no offsets set in the menu? RIT and XIT were off.
Later I tested the radio on 28-MHz by itself and split mode transmitted what VFO-B shows on the dial. But putting the radio back on 2m (transverter mode) and frequency was off again using split mode.
I used my EIP538 frequency counter to measure transmit frequency (counter is within 1-Hz of my Rubidium frequency source so very accurate).
Well I found out why this was happening (by exploring my manual). In the Menu is a setting called SPLIT SV and it was set=YES. Turning it to "NO" removed the offset. I have no idea what exactly this setting does but that solved the issue. I even had penciled it "yes" as the correct setting back when I got the radio (2010). SPLIT SV has to do with something with saving SPLIT, RIT, and XIT by band.
If I have a 2m frequency error its normally corrected by XV1 OFS setting. What SPLIT SV accomplishes is beyond me.
73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: [email protected] ______________________________________________________________ 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]
