RDS level 2KHz, deviation +- 75KHz.

[Boki]

Hi All,

I have a specification on my FM TX,

RDS level 2KHz, deviation +- 75KHz.

Question:
1. If my FM TX freq is 100MHz, where is the RDS freq ?
2. The deviation means when RDS is trasmitting ( and keep trasmitting
data repeat), I check the tone deviation of RDS?

Thank you so much!

Best regards,
Boki.

 

[martin griffith]

Hi All,

I have a specification on my FM TX,

RDS level 2KHz, deviation +- 75KHz.

Question:
1. If my FM TX freq is 100MHz, where is the RDS freq ?
2. The deviation means when RDS is trasmitting ( and keep trasmitting
data repeat), I check the tone deviation of RDS?

Thank you so much!

Best regards,
Boki.

try radio newsgroups, such as rec.radio.broadcasting


martin

 

[Joerg]

Hello Boki,

I have a specification on my FM TX,

RDS level 2KHz, deviation +- 75KHz.

Question:
1. If my FM TX freq is 100MHz, where is the RDS freq ?

AFAIK it rides on a 57kHz subcarrier.

2. The deviation means when RDS is trasmitting ( and keep trasmitting
data repeat), I check the tone deviation of RDS?

Thank you so much!

Best would be to read up on the spec:
http://www.rds.org.uk/rds98/rds98.htm

 

[[email protected]]

Hi All,

I have a specification on my FM TX,

RDS level 2KHz, deviation +- 75KHz.

Question:
1. If my FM TX freq is 100MHz, where is the RDS freq ?
2. The deviation means when RDS is trasmitting ( and keep trasmitting
data repeat), I check the tone deviation of RDS?

I have read the spec and implemented a sw-side receiver -> webb app.
Anyway asfair, RDS data is sent at 57 kHz just like the sound is sent at
<19 kHz. A simple way to get to the data is to get the baseband signal
connected to an RDS chip from philips which will give you data+clock asfair.