B
Boki
- Jan 1, 1970
- 0
Hi All,
I have some FM frequency test questions, could you please advice?
1. SNR, should I get the definition of SNR first? or we do have general
SNR definition for FM ?
In my experiance, I will calculate as this:
Major tone power - the most high noise power between BW.
2. Frequency variation:
A: When FM TX power on, but no music is loaded, compare to when music
is loaded.
B: When FM TX power on, compare RDS transmitting data and no data.
I am not quite understand the RDS operation, seems a second FM TX near
major tone...?
3. I saw the major tone (FM freq,ex: 100MHz ), when music is loaded,
the whole frequency variation is very big, almost become a triangle (
originally is a single tone ), is that correct?
Thank you very much!
Best regards,
Boki.
I have some FM frequency test questions, could you please advice?
1. SNR, should I get the definition of SNR first? or we do have general
SNR definition for FM ?
In my experiance, I will calculate as this:
Major tone power - the most high noise power between BW.
2. Frequency variation:
A: When FM TX power on, but no music is loaded, compare to when music
is loaded.
B: When FM TX power on, compare RDS transmitting data and no data.
I am not quite understand the RDS operation, seems a second FM TX near
major tone...?
3. I saw the major tone (FM freq,ex: 100MHz ), when music is loaded,
the whole frequency variation is very big, almost become a triangle (
originally is a single tone ), is that correct?
Thank you very much!
Best regards,
Boki.