Voltage. Sinisa was correct in the computation of "THD". The "% harmonic distortion" number I used in my first post, and Lankford used in his paper, was based on power. So to prevent any further bad
Higher THD with rapid decay rates can be reduced, nearly to baseline, by increasing Threshold, and keeping the the signal under the point where AGC begins to operate. Clearly, as the measurements sh
Correct Correct Who knows. The original Orion used an OEM tuner card from LDG (no memory). I haven't actually looked at the board in my II to see how it's marked, but T-T supposedly changed their so
I've been poking at NR on and off for a couple of days now on 2.032. Using an Elecraft N-gen noise generator to a Daven RF attenuator (to control the fixed output of the N-gen), with an 8640B provid
Bit by bit? Really? Did you patent that yet :-) Define "works". Give me a definition that I could use to hang my hat on, so I could tell what NR products work, or don't by that definition. Aren't yo
I'll be anxious to see such a commercialized system for SSB, for example, that can "simply" delete all of the "noise bits". I could really use that the next time a storm rolls through north Texas. G
There is no bandpass filtering action on 2.032 with a steady state signal. That's also obvious from the spectrograms. Some high frequency rolloff, and that's it. Is there some reason it would show u
Wanted to make sure I wan't missing something obvious :-) There's a PDF file here with some samples of what I see on the II. I adjusted the levels so the NR/no-NR curves roughly overlapped, for comp
In many respects I wish I still had mine. I could have handled keeping both of them for a while, but didn't see any reason to hang on to it. Some lucky soul out there probably has it ... Grant/NQ5T
I won't bore you with the setup here, but will be happy to provide details to anyone who is interested. Consistent results were obtained by two independent methods: (1) graphical computation of SNNR,
Let me clarify a point here. What you say is true. However, that isn't exactly what I was looking at. The absolute value of SNNR does in fact increase, with NR off, and the bandwidth narrowed as it
Just to make sure this isn't misunderstood. I used the 3400a only to rough-set the signal level from the RF generator before collecting data for the test. The test results were derived entirely from
Sinisa published some spectrograms, and another list member sent me some spectral plots of NR behavior in 1.373b5, and in both cases the bandpass filter action of NR can can clearly be seen, where i
I used I general method similar to what the ARRL lab lays out in their product review techniques. Because the baseline noise level does change on a dynamic basis with a signal present versus no sign
What I hear, when I do this, is a nice quiet passband and then on a CW element I hear the element PLUS noise. So while the radio gets quiet in between elements, each element still comes with the noi
I don't think that's entirely true. Nobody here appears to be such an expert, since anyone who was would have already done what you proposed :-) It does little harm to poke at what you have to see h