View Single Post
  #11   Report Post  
Old September 6th 07, 05:12 AM posted to rec.radio.shortwave
Telamon Telamon is offline
external usenet poster
 
First recorded activity by RadioBanter: Jul 2006
Posts: 4,494
Default Ibiquity's "Gag Order" on engineers

In article ,
"David Eduardo" wrote:

"Telamon" wrote in message
...

So try again marketing hack. Explain the terms you use to express what
it takes for good reception.


"Good reception" is a perception of the listener, not a technical term.


It can and is quantified.

However, based on an enormous amount of data over many many years it can be
seen that outside the 10 mv/m contours of an AM or outside the 64 dBu
contours of an FM, listeners are not interested in tuning in to any
station... there is very close to no reported listening, in fact.


You don't know what 10mV/m or 64 dBu mean. You don't understand the
difference between units and multipliers.

A good example, which obviates "well, at the fringe of a metro, there are
less people to listen" is to take stations that do not fully cover the most
densely populated parts of a metro. On FM, we have looked at over 30 survey
periods in LA with a total sample of over 7000 persons per survey and
plotted the returns for KRCD and KRCV, which are class A FMs. There is
nearly no listening at home or at work outside the 64 dBu contours during
the last 8 years, despite the stations frequently being in the top 10
(simulcast) in LA... all the listening is in a very small area.

Years ago, we looked at the same thing for AMs in general, and found that
the 10 mv/m was the barrier to sustained listening, and, of recent, perhaps
the 15 mv/m is the limit where listeners consider a station listenable.


Snip

Stop using technical terms you don't understand to make a point.

--
Telamon
Ventura, California