S D B C - D K 3 U G
28
Rev. 0.3
7.2.4. Results (CW Tests)
7.2.4.1. Output Power
1. Set the center frequency of spectrum analyzer to the frequency under test.
2. Set span to 10 MHz.
3. Measure the TX output power on displayed plot.
Figure 34. Spectrum Plot Showing CW Output at 917 MHz
7.2.4.2. Frequency Offset at Transmitter Output
1. Set the center frequency of spectrum analyzer to the frequency under test.
2. Set span to 100 kHz.
3. Measure the frequency offset between the expected frequency as selected in the menu and the actual TX
output frequency.
Figure 35. Typical Spectrum Plot Using a Silicon Labs Branded Testcard
In Figure 35, it can be seen that the frequency error is less than 1 kHz.
Silicon Labs testcards are designed to have a maximum frequency error of < 5 kHz.
Summary of Contents for C8051F930
Page 2: ...SDBC DK3 UG 2 Rev 0 3 ...
Page 9: ...SDBC DK3 UG Rev 0 3 9 Figure 5 MSC DBSB8 Schematic 2 of 2 ...
Page 21: ...SDBC DK3 UG Rev 0 3 21 Figure 24 Active Antenna and RSSI Indications ...
Page 23: ...SDBC DK3 UG Rev 0 3 23 Figure 26 Lab Equipment Connection Diagram ...
Page 75: ...SDBC DK3 UG Rev 0 3 75 NOTES ...
