[TowerTalk] Fwd: Fwd: Multi-Band Vertical Question

hanslg at aol.com hanslg at aol.com
Fri Aug 13 16:23:57 PDT 2010


 If you only have two signals present you will see an extra signal between the two signal plus weaker signal on each side of the main signal. It is the difference between the two main signals that is the "key". If you have one signal at 20MHz and one at 20.010MHz you will find a signal at 20.005MHz. If you have several main signals you will see a complex picture of all the above combinations. It will look more like a grass law across the screen.

You will also see the harmonics from each of the main signals.

Hans - N2JFS



-----Original Message-----
From: Grant Saviers <grants2 at pacbell.net>
To: Tower Talk List <towertalk at contesting.com>
Sent: Fri, Aug 13, 2010 6:48 pm
Subject: Re: [TowerTalk] Fwd:  Multi-Band Vertical Question

re: metal roof problems:  If I look on a spectrum analyzer connected to 

a separate antenna, what should I see? Where should I look re the 

transmit frequency?  Is cross modulation the problem or is it 

intermodulation products?  What kind of signals am I looking for?



> It's your (ham) neighbors who would hear it. :)


> 73, Jim K9YC





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