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#91
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
In article ,
Don Bowey wrote: On 7/1/07 10:06 PM, in article , "Telamon" wrote: In article , cledus wrote: Snip Would you please have the decency to snip rec.radio.shortwave and other groups from the newsgroup header. Thanks. Would you please come and ask nicely. I don't like how you put your order. This is a stupid cross posted Troll thread so pretty please with sugar on it snip the other news groups it does not originate from. Thank you very, very much in advance. -- Telamon Ventura, California |
#92
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
On Jul 2, 9:09 pm, Telamon
wrote: In article , Don Bowey wrote: On 7/1/07 10:06 PM, in article , "Telamon" wrote: In article , cledus wrote: Snip Would you please have the decency to snip rec.radio.shortwave and other groups from the newsgroup header. Thanks. Would you please come and ask nicely. I don't like how you put your order. This is a stupid cross posted Troll thread so pretty please with sugar on it snip the other news groups it does not originate from. Thank you very, very much in advance. -- Telamon Ventura, California Bravo ! ;o} ~ RHF |
#93
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-lowcarrier frequency
Ron Baker, Pluralitas! wrote:
"John Smith I" wrote in message ... Radium wrote: snip Suppose you have a 1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave. What would it look like on an oscilloscope? What would it look like on a spectrum analyzer? Then suppose you have a 1.1 MHz sine wave added to a 0.9 MHz sine wave. What would that look like on an oscilloscope? What would that look like on a spectrum analyzer? |
#94
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-lowcarrier frequency
Don Bowey wrote:
On 7/2/07 12:29 PM, in article , "John Smith" wrote: Don Bowey wrote: You allude to knowing how the sidebands come into being yet you cannot provide any clue that you really understand AM, and you continue to think microphone current in a telephone loop is the same thing. You're as FOS as they come. I doubt you have fooled anyone Please point out, above, or wherever you wish, where I said they were fooled. You can't you POS liar. Buddy, you speak about these people being "fooled", interesting term, implying you consider them fools! on this board with your attempts to look like you know more than you really do. I doubt that is true, they have seen through you in a heartbeat, most, probably long before now ... I imagine they are just embarrassed for you--having made such an A$$ of yourself ... JS While you continue to allude to skills and knowledge you don't have. Do you often get away with this useless chest beating? |
#95
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-lowcarrier frequency
Don Bowey wrote:
On 7/2/07 2:12 PM, in article , "John Smith" wrote: Don Bowey wrote: ... While you continue to allude to skills and knowledge you don't have. Do you often get away with this useless chest beating? You pathetically petty idiot ... I guess you call names because of your age. Or, others have called you names and it has hurt your ego. Get an education, grow-up and get off the drugs--you will be able to finally respect yourself! :-( Best hope in your therapy! JS But POS was intended for guys like you. Ok! Again, you win. Please enjoy your blissful ignorance with my good wishes. Finis |
#96
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snip, Snip. SNIP ! the "Rec.Radio.Shortwave" Group from the Newsgroups {Distribution} Header - please, Please. PLEASE !
On Mon, 02 Jul 2007 14:42:49 -0700, RHF
wrote: On Jul 2, 6:16 am, Don Bowey wrote: On 7/1/07 10:06 PM, in article , "Telamon" wrote: In article , cledus wrote: Snip Would you please have the decency to snip rec.radio.shortwave and other groups from the newsgroup header. Thanks. - Would you please come and ask nicely. - I don't like how you put your order. don bowey, Don Bowey. DON BOWEY ! Oh Please with Sugar and Spice and Everything Nice snip, Snip. SNIP ! the "Rec.Radio.Shortwave" Group from the Newsgroups {Distribution} Header when you Post your Reply - It would be ever so decent of you Kind and Wonder Sir. ;-) thank you very much - most respectfully ~ RHF --- Seems to me his posts are on topic for rrs, so why don't you just learn how to use a filter? -- JF |
#97
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snip, Snip. SNIP ! the"Rec.Radio.Shortwave" Group from the New...
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#98
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
On Mon, 2 Jul 2007 23:03:36 -0700, "Ron Baker, Pluralitas!"
wrote: "John Smith I" wrote in message ... Radium wrote: snip Suppose you have a 1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave. What would it look like on an oscilloscope? --- LTSPICE circuit list: Version 4 SHEET 1 1672 1576 WIRE 32 880 -256 880 WIRE 192 880 32 880 WIRE 528 912 336 912 WIRE 192 944 -112 944 WIRE -256 992 -256 880 WIRE -112 992 -112 944 WIRE -256 1120 -256 1072 WIRE -112 1120 -112 1072 WIRE -112 1120 -256 1120 WIRE -256 1168 -256 1120 FLAG -256 1168 0 FLAG 32 880 in SYMBOL SPECIALFUNCTIONS\\MODULATE 192 880 R0 WINDOW 0 37 -55 Left 0 WINDOW 3 55 119 Center 0 SYMATTR InstName A1 SYMATTR Value mark=1e6 space=1e6 SYMBOL voltage -256 976 R0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value 10 SYMBOL voltage -112 976 R0 WINDOW 3 24 160 Left 0 WINDOW 123 24 132 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value SINE(.5 .5 1e5) SYMATTR Value2 AC 1 TEXT -96 1240 Left 0 !.tran 5e-5 TEXT -96 1208 Left 0 !.params w0=2*pi*1K Q=5 --- What would it look like on a spectrum analyzer? --- | | | | | | --------+--------------------+-------+------+---- 100kHz 0.9MHz 1MHz 1.1MHz --- Then suppose you have a 1.1 MHz sine wave added to a 0.9 MHz sine wave. What would that look like on an oscilloscope? --- LTSPICE circuit list: Version 4 SHEET 1 880 680 WIRE 240 64 176 64 WIRE 432 64 320 64 WIRE 352 144 224 144 WIRE 352 160 352 144 WIRE 16 176 -208 176 WIRE 160 176 96 176 WIRE 176 176 176 64 WIRE 176 176 160 176 WIRE 320 176 176 176 WIRE 432 192 432 64 WIRE 432 192 384 192 WIRE 320 208 288 208 WIRE 288 256 288 208 WIRE 16 288 -48 288 WIRE 160 288 160 176 WIRE 160 288 96 288 WIRE 224 320 224 144 WIRE 352 320 352 224 WIRE -208 336 -208 176 WIRE -48 336 -48 288 WIRE -208 448 -208 416 WIRE -48 448 -48 416 WIRE -48 448 -208 448 WIRE 224 448 224 400 WIRE 224 448 -48 448 WIRE 352 448 352 400 WIRE 352 448 224 448 WIRE -208 496 -208 448 FLAG -208 496 0 FLAG 288 256 0 SYMBOL voltage -208 320 R0 WINDOW 0 -42 5 Left 0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V1 SYMATTR Value SINE(0 .1 1.1e6) SYMBOL res 112 160 R90 WINDOW 0 -33 56 VBottom 0 WINDOW 3 -31 61 VTop 0 SYMATTR InstName R1 SYMATTR Value 1000 SYMBOL voltage -48 320 R0 WINDOW 0 -39 4 Left 0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V2 SYMATTR Value SINE(0 .1 .9e6) SYMBOL res 112 272 R90 WINDOW 0 -38 56 VBottom 0 WINDOW 3 -31 59 VTop 0 SYMATTR InstName R2 SYMATTR Value 1000 SYMBOL res 336 48 R90 WINDOW 0 -36 59 VBottom 0 WINDOW 3 -36 61 VTop 0 SYMATTR InstName R3 SYMATTR Value 10k SYMBOL voltage 352 416 R180 WINDOW 0 14 106 Left 0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V3 SYMATTR Value 12 SYMBOL voltage 224 304 R0 WINDOW 0 -44 4 Left 0 WINDOW 3 24 104 Invisible 0 WINDOW 123 0 0 Left 0 WINDOW 39 0 0 Left 0 SYMATTR InstName V4 SYMATTR Value 12 SYMBOL Opamps\\UniversalOpamp 352 192 R0 SYMATTR InstName U2 TEXT -252 520 Left 0 !.tran 3e-5 Tricky!!! It looks like AM but it isn't, it's just the phases sliding past each other slowly and algebraically adding which creates the illusion. --- What would that look like on a spectrum analyzer? --- | | | | -----------------------------+--------------+---- 0.9MHz 1.1MHz -- JF |
#99
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
On Jul 3, 12:50 pm, John Fields wrote:
On Mon, 2 Jul 2007 23:03:36 -0700, "Ron Baker, Pluralitas!" wrote: "John Smith I" wrote in message ... Radium wrote: snip Suppose you have a 1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave. What would it look like on an oscilloscope? snip What would it look like on a spectrum analyzer? | | | | | | --------+--------------------+-------+------+---- 100kHz 0.9MHz 1MHz 1.1MHz Then suppose you have a 1.1 MHz sine wave added to a 0.9 MHz sine wave. What would that look like on an oscilloscope? snip Tricky!!! It looks like AM but it isn't, it's just the phases sliding past each other slowly and algebraically adding which creates the illusion. What would that look like on a spectrum analyzer? | | | | -----------------------------+--------------+---- 0.9MHz 1.1MHz -- JF But if you remove the half volt bias you put on the 100 kHz signal in the multiplier version, the results look exactly like the summed version, so I suggest that results are the same when a 4 quadrant multiplier is used. And since the original request was for a "1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave" I think a 4 quadrant multiplier is in order. ....Keith |
#100
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AM electromagnetic waves: 20 KHz modulation frequency on an astronomically-low carrier frequency
On Jul 3, 2:07 pm, Keith Dysart wrote:
On Jul 3, 12:50 pm, John Fields wrote: On Mon, 2 Jul 2007 23:03:36 -0700, "Ron Baker, Pluralitas!" wrote: "John Smith I" wrote in message ... Radium wrote: snip Suppose you have a 1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave. What would it look like on an oscilloscope? snip What would it look like on a spectrum analyzer? | | | | | | --------+--------------------+-------+------+---- 100kHz 0.9MHz 1MHz 1.1MHz Then suppose you have a 1.1 MHz sine wave added to a 0.9 MHz sine wave. What would that look like on an oscilloscope? snip Tricky!!! It looks like AM but it isn't, it's just the phases sliding past each other slowly and algebraically adding which creates the illusion. What would that look like on a spectrum analyzer? | | | | -----------------------------+--------------+---- 0.9MHz 1.1MHz -- JF But if you remove the half volt bias you put on the 100 kHz signal in the multiplier version, the results look exactly like the summed version, so I suggest that results are the same when a 4 quadrant multiplier is used. And since the original request was for a "1 MHz sine wave whose amplitude is multiplied by a 0.1 MHz sine wave" I think a 4 quadrant multiplier is in order. ...Keith- Ooops. I misspoke. They are not quite the same. The spectrum is the same, but if you want to get exactly the same result, the lower frequency needs a 90 degree offset and the upper frequency needs a -90 degree offset. And the amplitudes of the the sum and difference frequencies need to be one half of the amplitude of the frequencies being multiplied. ....Keith |
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