SI47XX-EVB Datasheet, PDF (111/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
Table 28. Debugging Guidelines for Si47xx EVB
Mode
Symptom
Solution
AM Receive
Excess interference/
Poor reception
1. Check the antenna board connection on J2.
2. Make sure the ferrite bar is not loose and does not slide in the coil.
3. If using a laptop, ensure it is running off the battery and not plugged in.
4. Alternatively, disconnect from the host PC and run from battery power.
5. Move to a stronger signal environment. Make sure you are close to a window or
outside in the open when evaluating AM reception. Large metal structures, like
buildings, interfere with AM reception so it is best to be away from these sources
of interference.
FM Transmit Audio distorted/Limiter
engaging excessively
Confirm that audio input levels match the Line Input Attenuation
and Maximum Line Input Levels.
Disable or scale back the gain of the audio dynamic range control.
FM Transmit Poor transmit audio
quality
Increase the RF level.
Increase the audio deviation level.
Change the RF frequency to a channel with less interference.
The RPS feature can be used to find candidate frequencies.
Rev. 0.8
111