Oops... pretty bad with my cut and pasting... The sentence: "This behavior increases the passband attenuation noise during pauses in speech or between CW elements." should have been: The filter incre
Thanks for the clarification. Apparently I know enough to be dangerous ;) Interesting! I wonder if Ten-Tec did this to reduce the DSP workload thus increasing overall performance (i.e.. sweep, and us
For the 1.xxx code, I was wondering if the DSP was having over-run issues; the time it took the DSP to do all the calculations per sample was longer than the sample period. But I suppose that would h
Bill, W4ZV **NR will not do anything that adjusting DSP BW and Gain controls will not do faster and more directly.** There is an important difference between the NR filter (Adaptive Predictor with Le
Gary, I'm interested in learning more about this technique. Can you recommend any reference material on the subject? Thanks, Lin WB1AIW Incidentally, I also have professional experience with adaptive
With enough time, I suppose one could decipher very noisy signals. I can see some pale-skinned dude sitting in a CIA lab spenting hours cleaning up a recorded secret message, but what about a more re
Hi Sinisa, Wouldn't ~10ms would do it? Can't say for sure, however, that the latest code even uses this method any more. Lin the NR will quickly increase attenuation during the period between CW elem
Much obliged, 73, Lin There are many excellent references available, but some of them make for very dense reading. Some of the more basic stuff can be found in Technical notes published by Bruel and
Wow, some great information has been brought forth here in the last 24 hrs! Thank you, Sinisa and Grant, for taking the time to run those tests and sharing the results with us. They show me that my c
definitely off topic, sorry in advance Have a listen to WU3A's signal, 28.401600. It has a donald duck quality. I can't raise him to let him know... 73, Lin WB1AIW
Hi Grant, Just a thought- I assume you made these measurements with a steady state signal. Well that will be the worst case for a downward expanding type of NR. However, if the carrier was modulated
SUB RX NR (O2 V2.032) is acting up for me. To test, I went to a quiet area (10 meters in this case). Set up: Rf gain = 100, USB, BW = 2400Hz, AGC = Hang 0s, Decay 80dB/s, Threshold 0.37uV, NB off, AN
Hi Ron, What you described is the way I have been using the v2.xxx NR since day one (rcv'd OII 12/29/05). Changing the NR value seems to adjust the amount of expansion, and with the rf gain, the user
Hey Bob, Before you throw in the towel, check and check again that the sub receiver AF gain (RF gain too, to be doubly sure) is turned completely down. As an alternative, recommended at this point, i
Ron and all, Here's my findings for my Orion II. I notice that your meter is more generous by 10 to 13 dB! This table shows the input power needed to obtain the following Orion II S-Meter readings us
I also have the white dot next to the STEP value on my Orion II (2.030) using COLOR 3. I also have a rare problem with audio when selecting BinRX=Main (AUDIO Menu) and is related to having NR and/or
John, No problem. The noise that occurs is so loud it hurts my ears when it happens (wearing headphones). I believe that there is a combination or combinations of settings that case the DSP to get a
After reading some some of the comments about the O2 noise blankers, I did this test: O2 settings: AGC: slow (Hang: 2.02 sec, Decay: 5dB/s, Threshold: 0.37uV) F= 21.3MHz, USB, BW=2100hz, PreAmp OFF,
Grant, Rather than being "another very narrow filter", the NR behaves more like an expander type of circuit, implemented in software, with its threshold being slightly above, and adjustable around, t
Hi Grant, Well, I re-read those sections, and have read them many times before, and I stand by what I wrote earlier. I believe there is different NR code for the Orion I (pre-V2) and that is what tha