RE: [smartBridges] Combined power of radio/antenna

[Kevin Proctor]

That is a pretty universal opinion in the RF world.     On a spectrum analyzer, you should see a nice smooth peak for the signal centered right smack on the frequency desired.  Smaller peaks may be seen at regular intervals (usually multiples of the IF) with high power radios of 25-50 watts or more.  This is often referred to as "splatter" and is not desirable at all and should be filtered out.  Low power radios should show no splatter at all, period.  Splatter is a normal function of radio signal propagation, but is routinely filtered out.  Crummy filters make for dirty radios.   A radio that does not show splatter without an amp may show splatter after adding an amp for a couple of reasons.  First, the amp may have amplified existing splatter that was down in the noise and could not be seen.  OR, the amp can introduce splatter due to poor filtering on the output.  Additional filtering should be added to reduce or eliminate that splatter.  We have those filters available here at EC.   In my opinion, if you are adding amps to your system, you should have a spectrum analyzer to check for splatter.  A Spec An is a good tool to have anyway.  No, it is not a cheap piece of equipment, but should be as necessary to you as the wrenches you use to install an antenna.  A radio system is only as good as it's operator and a good operator will use every tool available to ensure clean operation.   Kevin B. Proctor Customer Service Internet and International Orders Electro Comm Distributing Inc 5015 Paris St Denver CO 90239 USA   Phone: +1-303-371-8182                 800-525-0173 FAX:    +1-303-371-8158                 800-423-8018 [EMAIL PROTECTED]     -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Scott Damron Sent: Wednesday, September 03, 2003 4:45 PM To: [EMAIL PROTECTED] Subject: RE: [smartBridges] Combined power of radio/antenna   **OPINION** In my opinion, crappy or if you prefer, bad radios are ones that just spray frequency all over the place without focus, and possibly have lots of sidebands and noise.  Good radios have a good control over channels, don't bleed into other channels when set to a specific one or when hopping, don't hop into 2 or 3 channels instead of just one. **OPINION**   Scott   -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Rob Genovesi Sent: Wednesday, September 03, 2003 3:32 PM To: [EMAIL PROTECTED] Subject: Re: [smartBridges] Combined power of radio/antenna     At 12:02 PM 9/3/2003 -0700, you wrote: >Possibly and maybe why we are seeing problems? but I also agree >sometimes you need an amp when the circumstances warrant it.If you use >crappy radios sure its going to cause tons of problems. If amps were >bad no one would make them they are made for a reason..   Can someone clarify on the difference between "good" and "crappy" radios?  It's my understanding that this is how "cleanly" the radio outputs energy - is this determined using a spectrum analyzer?  Does anyone have   any examples "good" and "crappy" radio signatures?   Just trying to add to my own knowledge base here ...     TIA,            Rob     ----------ANNOUNCEMENT---------- Don't forget to register for WISPCON IV http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm   The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org      ----------ANNOUNCEMENT---------- Don't forget to register for WISPCON IV http://www.wispcon.info/us/wispcon-iv/wispcon-iv.htm   The PART-15.ORG smartBridges Discussion List To Join: mailto:[EMAIL PROTECTED] (in the body type subscribe smartBridges <yournickname> To Remove: mailto:[EMAIL PROTECTED] (in the body type unsubscribe smartBridges) Archives: http://archives.part-15.org