SI47XX-EVB Datasheet, PDF (24/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
2.2.5.2. SW and Weather Band Antenna Interfaces
Figure 17. SW/WB Antenna Card (SW Population) and (WB Population)
The BNC connector, J2, will be used to connect a whip antenna for shortwave, FM, and weather band reception.
For SW reception, switch S1 must be in the SW position. The ferrite bar is used for AM reception, and the switch
S1 must be in the AM position for AM reception.
When using the WB Antenna Card, WB reception is through the whip antenna. For a better listening experience,
plug the headphones to J30 rather than J24.
Note: LW not supported with SW/WB Antenna Card.
2.2.5.3. Si474x Antenna Dummy Card
Figure 18. Si474x Antenna Dummy Card
24
Rev. 0.8