Si4721 datasheet(91/164 Pages) SILABS

91 / 164 page

Si47xx-EVB

Rev. 0.8

7.2. Weather Band Main Window

The weather band main window will appear after initialization.

Figure 72. Weather Band Receiver Main Window

Table 22. Weather Band Receiver Main Window Descriptions

Name

Description

Tune/Seek

Tune Down (<), Tune Up (>) buttons execute a signal channel step (25 kHz step).

Seek function is not available in the WB Receiver mode.

Frequency Slider Bar,

AFC Valid, Alert Tone

The Frequency Display indicates the frequency in MHz. To change the frequency,

drag the pointer in the Frequency Slider Bar to the desired frequency.

AFC Rail indicator will be red if the tuned frequency is in an AFC rail state;

otherwise the indicator will be grey

The Alert Tone indicator will be green if the 1050 Hz Alert Tone is detected.

Volume, Mute

Select the Si473x output volume (0-63) by moving the slider bar pointer. Press the

Mute button on the mute radio. The button will be red if the radio is muted. Press

the Mute button again to remove the muting.

Auto Scan,

To Preset, Select Stn

Auto Scan, To Preset, Select Stn functions are not available in the WB Receiver

mode.

5Status

The RSSI indicator displays the RSSI of the signal in dBuV. The SNR indicator

displays the SNR of the received signal in dB. The varactor is not available in the

WB Receiver mode.

Preset

Press the desired button to tune to the frequency displayed on the button. To store

a new value to the preset button, tune to the desired frequency and then press

and hold the desired button for 1.5 seconds. The button will then change to

indicate the stored frequency. This information is stored to a file and used the next

time the program is run.

Function

The Function buttons are used to boot up the device in a different mode.

SAME Event

Information

The SAME Event Information displays the SAME Event Information. Use the up/

down arrow key to view different events. (Si4707 only)

Si4721 Datasheet(PDF) 91 Page - Silicon Laboratories

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