Beware the noise blanker can introduce a lot of false products with strong signals. For example on 144 MHz I have the PX3 NB on and it does cut out display of powerline noise, but as soon as a strong signal appears on the band the noise level bounces up and down way beyond the actual signal. So it is a balancing act like so many things.
I don't have a problem with the sensitivity of the waterfall here, I will say the viewing angle is a big narrow and I do lose sight of the waterfall when not viewing it straight on sometimes. Perhaps you could post a photo or video of the problem you are seeing John. 73 David Anderson GM4JJJ > On 31 Jul 2015, at 12:29, Matt Maguire <matt.vk...@gmail.com> wrote: > > Another thing to try is the noise blanker in the PX3. At the moment I have an > arcing power pole down the road from my place spewing out lots of garbage on > the air, which can be seen on the PX3. If I enable the PX3's noise blanker, > it really cleans up the display and lets me see the underlying signals much > more clearly. > > 73, Matt VK2RQ > > > > > On Fri, Jul 31, 2015 at 4:06 AM -0700, "John Kramer" <jkra...@iafrica.com> > wrote: > > > > > > > > > > > Matt > Thanks for your response, really appreciate it. > 1. Yes, the RX IQ is enabled - I think if it wasn’t enabled I wouldn’t see > anything on the PX3.It is working normally, it’s just that the trace left on > the waterfall is extremely faint for a signalthat is 20 - 30 db above the > noise floor. The Flex and PSDR will show a clear trace at close to the noise > level or just a few db above it. Maybe I am expecting too much from what > isessentially a portable radio and portable panadapter.2. Yes, I have fiddled > with the REF and SCALE, but can’t improve on the factory settings. I can > bring up the sensitivity, but that introduces noise on the waterfall, and the > wanted signalis now buried in the noise on the waterfall.3. No, I haven’t > tried the side nulling procedure. Having bought the KX3 and PX3 factory > built,I would have thought it would have been done prior to shipping ? But I > don’t see images oranything like that which would point to this being a > problem. It appears pretty wellbalanced. I don’t have an XG3 to calibrate, > but might try using the built-in generator in the PX3 > Thanks again for the reply, and have a good weekend > 73John, ZS5J C91J A25J > > > > > > > On 31 Jul 2015, at 11:25 AM, Matt Maguire <matt.vk...@gmail.com> wrote: > That doesn't sound normal. Three things to check:- in the KX3, do you have > the RX I/Q set to Enabled- on page 16 of the PX3 manual, check the REF and > SCALE settings- have you done the side and nulling procedure on page 26? > Maybe the gain settings there are not sane. > 73, Matt VK2RQ > > > > > On Fri, Jul 31, 2015 at 1:32 AM -0700, "John Kramer" <jkra...@iafrica.com> > wrote: > > > > > > > > > > > I bought a new KX3 and PX3 factory built, 3 weeks ago. It is a great pair, > but there are several > annoying things. The one thing that I have issue with is the very poor > “sensitivity” of the PX3. > I have 59 plus 10 signals on my KX3, however, on the PX3 waterfall the trace > is very faint and > indistinct. This is on a signal more than 20db above the noise floor !!! > I really hate to have to compare, but on my Flex radio’s, you can see signals > on the waterfall display > that you can barely hear in the receiver. And when signals are reasonably > strong, you can analyse > the signal to a good degree - you can see if the transmitting station is > splattering, overdriving etc > With the PX3 the sensitivity is quite poor - with a strong signal you can > barely see and analyse > the incoming audio. I have tried a number of settings, adjusting contrast etc > but I can’t seem > to improve it, and guess it’s inherent in the firmware. > Am I missing something ? or can it be improved in a future firmware update ? > > 73 > John, ZS5J C91J A25J > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to matt.vk...@gmail.com > ______________________________________________________________ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to gm4...@yahoo.co.uk ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
