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[QUOTE=&quot;tballister, post: 45130, member: 5087&quot;]Hello All:I'd just like to say thank you to those who did read the caveats about the HP8590B Spectrum Analyzer being used, who understood the significance of being calibrated or not, and who expanded on the relevance of precise calibration.Sigh.&nbsp; I guess I should revisit my own remarks and try to do a better job, or move those caveats up front in bolder letters.I've tried carefully on the site to indicate that nothing presented intends to state any absolute signal levels.&nbsp; To the contrary all presentations indicate relative results.Its a little bit like buying the cheapest Radio Shack (no offense) Volt-Ohm Meter and asking the question &quot;Which of these two batteries has a higher voltage?&quot;.&nbsp; You don't care what the voltage is, you just wanna see if the meter will move higher for one than the other.&nbsp; The only requirement is that the instrument has enough resolution to let you see the differences your interested in.To FOX TV and others who discuss &quot;Proof of Performance&quot; and related calibration-critical concepts:&nbsp; You are absolutely right and I agree with most everything you said.&nbsp; I held an FCC Radio Telephone First Class License for many years, and am still involved in broadcasting.&nbsp; So I like to think I'm pretty sensitive to the activity you are discussing.But to be clear, the &quot;Proof of Performance&quot; activity is precisely what I've tried to be clear I am not engaging in, claiming I'm engaging in, or intending to be engaging in.I just wanted to know which battery had more juice in it ...&nbsp; &nbsp; <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile&nbsp; &nbsp; :)" />Best Wishes,t[/QUOTE]

[QUOTE="tballister, post: 45130, member: 5087"]Hello All: I'd just like to say thank you to those who did read the caveats about the HP8590B Spectrum Analyzer being used, who understood the significance of being calibrated or not, and who expanded on the relevance of precise calibration. Sigh. I guess I should revisit my own remarks and try to do a better job, or move those caveats up front in bolder letters. I've tried carefully on the site to indicate that [B][U]nothing [/U][/B]presented intends to state any [B][U][COLOR="Red"]absolute[/COLOR][/U][/B] signal levels. To the contrary all presentations indicate [COLOR="Red"][B][U]relative[/U][/B][/COLOR] results. Its a little bit like buying the cheapest Radio Shack (no offense) Volt-Ohm Meter and asking the question "Which of these two batteries has a higher voltage?". You don't care what the voltage is, you just wanna see if the meter will move higher for one than the other. The only requirement is that the instrument has enough resolution to let you see the [I][U]differences[/U][/I] your interested in. To FOX TV and others who discuss "Proof of Performance" and related calibration-critical concepts: You are absolutely right and I agree with most everything you said. I held an FCC Radio Telephone First Class License for many years, and am still involved in broadcasting. So I like to think I'm pretty sensitive to the activity you are discussing. But to be clear, the "Proof of Performance" activity is precisely what I've tried to be clear [B][U]I am [COLOR="Red"]not[/COLOR] engaging in[/U][/B], claiming I'm engaging in, or intending to be engaging in. I just wanted to know which battery had more juice in it ... :-) Best Wishes, t[/QUOTE]

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