Radio Data System (RDS) > MRDS1322
Passive mixer question
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SteveyD:
Jan,
In the MicroRDS user manual;
Figure 5.2.1
Simple Passive Mixer.
Is the resistor value of 1K5 on the Audio/MPX signal for a mono audio input?
How would you handle a Stereo Audio input for this circuit?
Jan:
For stereo audio use two inputs instead of one and place two 3k3 resistors. So there will be three inputs and three resistors total connected to the sum point.
--- Code: ---Left o--[===]---------\ 2x 3k3
\
Right o--[===]-----------*---->
/
RDS o--[===]---------/ 15k
--- End code ---
Of course you will broadcast in mono as there's no stereo encoder.
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