Hi Vic, I'm using the K3. I haven't really played much with the noise blanker up until now, but I was just able to reduce the noise level by about 1-2 s-units by enabling NB with the following settings: DSP - T3-7 IF - NAR1
If I couple these settings with disabling the pre-amp, I can get the noise level down to around an S1! Great work Elecraft! I'll have to start playing around with the NB settings more often going forward. I'm not sure what effect this might have on a received signal however. (didn't test that yet) Are there any general guidelines for using NB? (i.e., DSP versus IF, using only DSP, using both, etc.) Thanks, - Bill Vic K2VCO wrote: > > KB1PXD wrote: >> Greetings, >> I'm currently seeing a consistent S5 for noise level on 20m with the >> pre-amp activated. It drops to S3 with the pre-amp disabled. This >> reading was taken at noon time on the east coast. Does this sound >> reasonable based on current conditions, or do you think I'm experiencing >> interference from something nearby? I'm fairly new to HAM radio so >> I'm not really sure what to expect for this time year and based on >> current conditions. It seems kind of high to me. > > This is probably primarily man-made noise from nearby (radius of a few > blocks) electrical devices. You don't mention what rig you are using, > but if it has a noise blanker, it might help. > > This time of year with everyone running air conditioners, it's > unfortunately not surprising to see a high noise level in urban or > suburban locations. > > Horizontal antennas will probably be quieter than verticals. Balanced > antennas are usually better than unbalanced ones, and dipoles can > benefit from the use of a balun. A random wire that comes into your > shack is probably the worst of all. > -- > 73, > Vic, K2VCO > Fresno CA > http://www.qsl.net/k2vco > _______________________________________________ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > -- View this message in context: http://n2.nabble.com/QRM-QRN---normal--tp664518p664666.html Sent from the Elecraft mailing list archive at Nabble.com. _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
