Hi Dana, Are you saying that, with the same signal input (from a test generator, for example), your radio, after calibration, shows roughly a 10 dB difference in its s-meter reading compared to the other radio?
My experience with several Flex radios is that, if they're both calibrated with the same signal source, they'll both have the same s-meter reading (irrespective of whether the preamp IC is the new one or the old one). For example, if I calibrate with a -50 dBm source, the final result will be an s-meter that reads -50 dBm when I drive my radio with that source, and it does not depend upon the preamp IC that's been installed. If both your radio and Joe's radio were calibrated using the same signal source (your XG1, for example) then I'd expect you both to have the exact same reading for it (and for any other signals, too). The fact that you don't implies that the calibration of one of the radios might be incorrect. Of course, there might be other issues, too. - Jeff, K6JCA --- N1OFZ <[EMAIL PROTECTED]> wrote: > Hi all, > > I spent some time last night pouring over the ECO's > and determining > which ones were done to my radio. I did end up > taking off the BPF > board to get a better look at the RFE. Also during > this process I > reviewed the block diagrams that Peter sent > (thanks!). > > Today with the help of Joe (AB1DO) I was able to > test my radio > against his radio. When we hooked up the XG1 my > radio was showing > the XG1's signal at about S3. It was also quite a > bit off frequency > and suffered from some serious image issues. After > a few runs at > calibrating it and tweaking it back on frequency we > ran it against > Joe's SDR. The result were that the calibrating > (with a good signal > source) seems to help significantly. My radio still > seems to be > about 10 dBm down from his but I believe it to be > because his radio > has the newer preamp (ECO025). We listened to a > signal that was > showing around -90 dBm on my radio vs. his which was > showing about > -80 dBm. > > I guess the lesson learned is that if you own a > SDR-1000 you best get > a XG1 or similar signal source. Maybe future Flex > Radio models can > incorporate a similar circuit? Unfortunately, I had > to go back to > work but I'm looking forward to getting it hooked > back up in the > shack tonight. > > Thank everyone who responded with suggestions and > comments. And a > big thanks to Joe for making time today to help me > sort out the > problems. It's great to have a local fellow Flexer! > > '73 > Dana N1OFZ > > _______________________________________________ > FlexRadio mailing list > FlexRadio@flex-radio.biz > http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz > Archive Link: > http://www.mail-archive.com/flexradio%40flex-radio.biz/ > FlexRadio Homepage: http://www.flex-radio.com/ > > FlexRadio Knowledge Base: http://kb.flex-radio.com/ > _______________________________________________ FlexRadio mailing list FlexRadio@flex-radio.biz http://mail.flex-radio.biz/mailman/listinfo/flexradio_flex-radio.biz Archive Link: http://www.mail-archive.com/flexradio%40flex-radio.biz/ FlexRadio Homepage: http://www.flex-radio.com/ FlexRadio Knowledge Base: http://kb.flex-radio.com/
