09-10-2024, 07:10 AM
I am playing with a homebrew FM broadcast band (88-108 MHz) receiver to use the band as an indicator for 2M DX.
There are a couple of puzzles. Can anyone help, please?
Is RDS used in Australia? I can find only one oldish claim that RDS is used by only one Sydney station and only for traffic reports.
How is a signal including a pilot tone generated? A straight FM modulation with only the pilot tone (i.e. during a period of silence in speech or audio) should place all the transmitted power in the pilot tone. This commentary,
ham.stackexchange.com/questions/7517/what-are-the-3-or-5-peaks-in-an-fm-broadcast-during-silence
suggests something different.
Thanks in advance.
Dave VK1DJA
There are a couple of puzzles. Can anyone help, please?
Is RDS used in Australia? I can find only one oldish claim that RDS is used by only one Sydney station and only for traffic reports.
How is a signal including a pilot tone generated? A straight FM modulation with only the pilot tone (i.e. during a period of silence in speech or audio) should place all the transmitted power in the pilot tone. This commentary,
ham.stackexchange.com/questions/7517/what-are-the-3-or-5-peaks-in-an-fm-broadcast-during-silence
suggests something different.
Thanks in advance.
Dave VK1DJA