Quote:
Originally Posted by Oldmadham
In the Oz case, I was referring to the audio bandwidth.
At 9KHz, this translates to 18KHz channel width.
I have done more frequency response tests on ABC MW AM Broadcast transmitters "than most people have had hot breakfasts", so the figures are burnt into my memory.
I don't think the bandwidth has been reduced since, but with the obsequious attitude of the regulators to "world's best practice" anything can happen!
Back when they were 10kHz audio bandwidth, the limiters were set for 3dB compression.
The corresponding figures at that time, for the "regional shortwave transmitters" VLX & VLW (now defunct) were 7kHz & 6dB.
These latter were internal broadcasters for the (then) vast areas of Western Australia which had no access to MW broadcasting.
|
When I lived in Queensland, I recall thinking that the AM transmissions were nice and crisp, compared with the woolly sound in the UK!