SI4820-DEMO Datasheet, PDF (5/10 Pages) Silicon Laboratories – Si4820/24 DEMO BOARD USER’S GUIDE

Si4820/24-DEMO
4. Operation
S4820/24-DEMO board, a complete analog tune and analog display radio, is very easy to operate:
1. Put two AAA batteries into the battery compartment.
2. Switch the power switch to the ON position. The board will power up to a radio band according to the
position of the band switch.
3. Change the band switch to the desired band.
4. Rotate the tuning wheel and find the desired frequency.
5. Rotate the volume control wheel or press the volume control push buttons to get a comfortable volume.
Note: For FM listening, the earphone cable must be connected to the board when J2 is set to "HP ANT" or an external antenna
must be connected to the BNC connector when J2 is set to "BNC".
For AM listening, the ferrite antenna must be connected to the board and the J3 is set to "Ferrite" before Turning on the
radio or band switching to AM.
For FM/AM sensitivity and SNR test, the tuner output volume level must be set to maximum by pressing push button S4,
or you might get degraded test results.
Rev. 0.1
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