R.V.R. Elettronica TRDS 4001, User Manual

Page: 21 / 62

TRDS 4001
17 / 36 User Manual Rev. 4.0 - 23/03/01
Stereo coder
Exciter
Left Right MPX out
MPX in
RF out
Exciter
Left Right
19 kHz
out
RF out
RDS in
If all the connections have been right realized, the coder will be working in 2-3 seconds
and sending the RDS messages.
It doesn’t need any adjustment because it’s already set before the ship; the MONO
or MPX signal is 0dBm on 600 Ohm (about 2.2 Vpp.).
In different case, it’s necessary be equipmented of a spectrum tester in order to set
the undercarrier wave level at -30 dB compared to the not modulated FM carrier
wave.