[BC] Speedometers on Cars. Do we need them?...

[Robert Meuser]

Scott,

you are very correct, a scope is the very best way to measure AM 
modulation. There is not a monitor in existence or ever built for AM or 
FM that does not have some kind of ballistic limitation. It is nice to 
have a mod monitor for proof measurements, but depending on the type, a 
good diode detector does that as well or better and without and 
significant bandwidth limitations.

I can not count the times I have seen a mod monitor read one thing and 
the scope showing carrier cut off. If you want the best possible AM 
sound, you NEED a scope to set negative mod.  As I stated earlier, no 
one really cares where the positives go although Jeff W and Willie both 
offered perfectly good means of measuring them.
R


Bailey, Scott wrote:

>Dennis,
>   There is nothing against having a mod monitor, but the commission
>doesn't require it and a good scope I think is the best. I know of one
>station that the commission came to inspect in this area.  The station
>has no mod monitor at the studio, nor transmitter site.  It was a 500
>watt AM.  They walked in the transmitter site, took a look at the bar
>graph on the BE transmitter, looked at the meter readings, then left. No
>question came up about a mod monitor.
>
>Scott
>
>
>
>
>When I bought my stations 11 years ago, neither the AM nor the FM had
>mod
>monitors. Several good engineers and an FCC Field Inspector have been
>through my plant. Nobody's ever indicated that I need to have seperate
>mod
>monitors in place. The Optimod on the AM and the exciter on my FM have
>pretty-colored Bouncy Bars, so I use them.
>
>As a small-market owner/operator, the money comes directly out of my
>pocket,
>and I've not spent it there. I have, however, spent the money on a new
>Nautel to replace an old RCA, and trenched and pvc'd about 400 feet of
>new
>coax out to the tower. Not afraid to spend money when I have to, but
>can't
>waste it, either.
>
>Dennis Switzer
>KKTY AM/FM
>Douglas, WY
>
>
>----- Original Message ----- 
>From: "Burt I. Weiner"
>Sent: Wednesday, July 19, 2006 12:15 AM
>Subject: [BC] Speedometers on Cars. Do we need them?...
>
>
>  
>
>>I don't think we speedometers in our cars either.  I rely on my
>>carburetor to not make my car go to fast.
>>
>>Burt
>>    
>>
>
>_______________________________________________
>
>Do you have a BDR? http://www.oldradio.com/bdr.htm
>
>_______________________________________________
>
>Do you have a BDR? http://www.oldradio.com/bdr.htm
>
>  
>