PPRuNe Forums - View Single Post - RAF Volmet on 5450Khz
View Single Post
Old 6th Feb 2016, 17:44
  #25 (permalink)  
syseng68k
 
Join Date: Jun 2009
Location: Oxford, England
Posts: 297
Received 0 Likes on 0 Posts
Thanks :-)...

I guess those who are paid to verify that the system works as intended
never have to listen at the end of a radio link. Radio receivers have to deal
with a very wide range of signal levels and have automatic gain control
(agc) built in. This prevents overload on large signal levels, while
still providing enough sensitivity to hear signals not much greater
than the noise floor. In practice, this means that the first syllable or
word can sometimes clip / distort while the agc catches up, making that
first syllable unintelligable.

Shanon volmet get round that by repeating the first word twice eg:
"Heathrow, met report, Heathrow", with pauses, so it's always clear
what location the report refers to. Contrast that with RAF Volmet, where
we often get an unintelligable mumbled / rattled off first word and no
idea of what the following report refers to.

Outward facing services often reflect the internal culture. If it looks
sloppy, then it probably is. The people who use this service deserve
better...
syseng68k is offline