Don’t forget to look for noise in vertical and horizontal polarity. Dave,
K4TO > On Aug 1, 2017, at 9:33 AM, Rick Miller - N1RM <[email protected]> wrote: > > I currently live in a townhouse and have made an offer on a few acres in a > more rural area. I would like to measure the relative noise levels between > the two locations to reduce the probability of surprises or disappointments > should I close the deal. I have gotten access to a very good battery > powered spectrum analyzer and plan to use a tripod-mounted 6 foot whip and a > 20 dB LNA to measure the noise levels at each location. > > While setting this up, I though it would be interesting to try to also use > the K3 to measure noise with the same antenna (but without the LNA). I've > written a Python script to control the K3 as it steps through each band and > records S meter levels. > > I'm looking for recommendations on K3 settings for this purpose. Specific > questions I have are: > > 1. Is the high resolution S meter command (SMH) the best way to measure > received signal strength with a computer? > > 2. What settings for attenuator, pre-amp, and AGC will give me the most > useful readings? Right now I'm using Off, On, and Off respectively for those > settings. > > 3. What Mode and Bandwidth settings should I use? Right now I'm using CW > and 200 Hz. I'm pretty sure I should be using a wider bandwidth and will > try that tonight. > > 4. Is this a dumb idea? > > My first run through very late last night showed almost no variation across > any of the bands. I did see differences between bands. Right now I pause > for 1 second after setting band, mode, and bandwidth, and then another > second after each frequency change (stepping in 10 KHz increments) for > things to settle. > I don't know the dynamics of the S-meter processing, so maybe I should be > waiting longer. > > Thanks for reading this. > > Rick > N1RM > > > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/K3-Using-K3-for-relative-noise-survey-tp7632955.html > Sent from the Elecraft mailing list archive at Nabble.com. > ______________________________________________________________ > 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] ______________________________________________________________ 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]
