Rick, That's what I'm working on right now.
73, Alan N1AL On Fri, 2010-10-29 at 17:20 -0700, Rick Prather wrote: > Alan, > > My S9 appears to be off by about 10db. How are you coming on a level > calibration routine? > > TIA, > Rick > K6LE > > > > On 10/29/2010, at 3:23 , Alan Bloom wrote: > > > A noise level of -140 dBm is reasonable with no antenna connected or a > > quiet band. It also depends on the span and how you have the K3 set up. > > On mine, the noise level is around -160 dBm with no antenna connected to > > the K3, the K3 preamp turned on, and the span set to 2 kHz. If I turn > > off the preamp, turn on the attenuator, and set the span to 200 kHz, the > > noise level is a little below -120 dBm. With an antenna connected it is > > higher than that. > > > > You can get an idea if everything is working right by comparing the K3 > > S-meter reading of a signal within the receive passband. S9 should show > > as roughly -73 dBm on the P3 display and change by 6 dB per S-unit below > > that. There's a table of dBm levels versus S-units in the latest P3 > > manual. > > > > Alan N1AL ______________________________________________________________ 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
