If signal strength was important to me, I would just measure the AGC voltage off a scanner.None of my scanners have an S-meter, so i am looking to get a OSCILLOSCOPE to check signal strength(s)
any particular Make,Model or specific things to look for when choosing one?
Thanks in advance.
As posted by mancow, an oscilloscope is not going to get it done.As i very much appreciate your response.
I really don't want to get into taking all my scanners apart to test signal strength on each one
An oscilloscope or as "mancow" mentioned a spectrum analyzer with test without having to open each scanner and make a seperate reading on each one.
As originally posted and help on Make,Model or other things to look for would be greatly apprecaited, maybe even one currently available on eBay would help.
Every scanner reacts differently to every antenna.As posted by mancow, an oscilloscope is not going to get it done.
In any case, you would have to hook it onto the scanner _somehow_ and that would involve going inside the scanner.
Why would you need a signal strength from each scanner? Having one with a signal strength indication would be handy for antenna comparisons and antenna aiming, but that would be about it. At VHF and above, signal strength is not all that important.
I live rural and have no need for a digital scanner.A cursory glance on google tells me that you may probably end up paying less for a scanner with an S-meter than you will for a spectrum analyzer anyway.
I think you're misinterpreting some of your results, and in either case, a great deal more test equipment would be required to see if/how any particular antenna reacts differently to different receivers. Relative signal strength is not necessarily a good measure of how well a receiver or antenna is functioning. And any difference of how a particular receiver reacts to a particular antenna is highly unlikely to show itself in the form of an s meter reading. Low band reception on an 800 MHz antenna is going to stink, no matter what receiver you use. 800 MHz reception on that same 800 MHz antenna is going to show identical relative signal strength characteristics, regardless of which receiver you use, meaning what peaks it in one receiver, will peak it in another. A relative signal strength reading will show gain improvements on an antenna, but it would be a pointless exercise to make that measurement with every receiver you have. The results would be the same.Every scanner reacts differently to every antenna.
I have found this out with my many home brews as well as factory antenna's.
So i am just looking to fine tune what antenna's work best and what freq's and what scanners receive better on what antenna's.
Test and tune as it's been called before.
What is it you hope to adjust? The scanner, or the antenna? Scanners generally are going to have a broad band input stage that's not adjustable. You get what you get. A realistic difference to expect between different makes and models of scanners would be noise figure, as a function of frequency. Some scanners amy perform better at low band, for example, than another. A different scanner may perform better at 800. But this is nothing you can fix or adjust without a preamp. I would also add that optimum noise figure doesn't necessarily come with best match to the coax, or with highest gain i.e. strongest signal levels. But it IS the only thing that really matters in weak signal reception.Fine tuning a scanner to a antenna is the same as many many ham users do for their hobby as well as they spend hours and hours and big bucks some times to achieve the ultimate combination.
Well, you were told wrong. An oscilloscope is SO not the right instrument to use. As suggested, a spectrum analyzer would do the job of measuring signal strength, but then, it's a stand alone instrument, and wouldn't make any distinction between receivers.I just want to be able to see what my antennas are doing as far as receive goes.
and i have been told the RIGHT sillyscope will do the job, i was not told what sillyscope to use to see what i want to see, that's why i made this post.
Not that I'm an expert by any means, but it sounds like your "expert"(i.e. salesman) just made his commission for the day.I will conduct my testing as Originally planned
with a Sillyscope, I have spoken to some
RF experts from several different companies
IE, Digital Sat as well as Broadband and
I have found the the type of scope needed.
And it CAN be done with a scope, as i knew
or why would i have asked.
I asked for help on what scope was needed
and no one could provide this information.
I was not looking for opinions.
I was looking for particular Make,Model or specific things to look for when choosing one
now i have that information.