I think it is very hard to know what the "power readings" of the Orion meter really mean. Actually, most, if not all, of the Orion meter readings are "relative." The power meter description says" --
I observed the same things in my O2 regarding the power output readings. While the meter only seems to be accurate at the 100 Watt level, the power setting control is amazingly accurate. Using both a
Thanks to all for the suggestions. On RTTY AFSK (basically a constant carrier)I do get about 80-90 watts out on second measurement, with Navigator set to max outputs. The Navigator still seems to be
That is beginning to make more sense, although the sine modulation may indicate there is a hum problem lurking somewhere! If you can't push the O2 into ALC range, the output from the Navigator is too
Could that slow sine modulation be the beat frequency between the 3rd harmonic {180 Hz} of the AC mains and the AFSK signal since the shift frequency of 170 Hz? The difference being 10 Hz. I would th
I'd check to see that the Line Gain on the radio is set correct. If Line Gain is 100% and Navigator is maxed out, then yes there is a problem. I'd try the direct connection method in an effort to iso
What I saw as a "sine" envelope is apparently normal for PSK, and probably not some kind of ground problem. See waveform descriptions at: http://www.ssiserver.com/info/pskmeter/pacificon2002.pdf or h
The PSK idle signal is a two tone signal: -- The PSK idle signal is a strong of zeros. If one examines the PSK31 idle signal, it can be shown that the constant phase change of 180 degrees and the cos
A PSK31 signal is a two tone signal. That likely accounts for what you are seeing on the 'scope. That also accounts for the lower average power output reading compared to a CW output. Somebody check
I agree with all, except.......... set the Orion power output for 100 watts in the CW mode and then adjust the audio from the computer or interface or Line Gain to produce an output of 45 to 50 watts
Good point about the PSK idle. I knew that and failed to mention it. When in PSK idle, it is indeed a two tone signal and shows about 50% of PEP on many power meters. When sending data, I'm not sure
In thinking about this a bit more, if the slow sine modulation is seen while using the PSK mode then I would suspect the 2nd harmonic, being 62 Hz, of the PSK signal beating against the 60 Hz line fr
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 11 Feb 2009 19:59:13 -0600
You have it all WRONG. Go look at: http://bipt106.bi.ehu.es/psk31theory.html The envelope is the characteristic of two tones spaced 31 Hz apart. That's the beat note and the software makes the phase
Bob - I think your thought about 2nd harmonic may be a very significant factor. I know that in my original Orion 565 I was trying to do a AF freq response watching the RF amplitiude on a meter - Thin
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 11 Feb 2009 21:18:59 -0600
When you inject a tone below the cutoff frequency of a high pass filter, often it takes very little distortion to make the second or third harmonic show up in the pass band of that high pass filter.