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SI4826 Datasheet(PDF) 4 Page - Silicon Laboratories |
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SI4826 Datasheet(HTML) 4 Page - Silicon Laboratories |
4 / 42 page AN603 4 Rev. 0.3 3.1.3. Pass Criteria For the band property with MCU setting, the tuning frequency range is the range which the user set (for setting the value of BAND TOP and BAND BOTTOM in the SETTING MENU, see the Si4822/26/27/40/44-DEMO Board User’s Guide for details). For the band property with tuner default, the pass criteria are as follows: 3.2. FM Sensitivity 3.2.1. Description Determine input level in dBμVemf to result in 26 dB SINAD in mono RX mode. 3.2.2. Conditions / Procedure 1. Connect test equipment as shown in Figure 1. 2. Configure the tuner in standard configuration. 3. Configure the audio analyzer: a. Select Analyze. b. Set Function = THD+N / SINAD. i. Set Measurement Mode = SINAD. ii. Set Unit = dB. iii. Set Filter = A-weighting. iv. Set Frequency Limit Low = 300 Hz. v. Set Frequency Limit High = 15000 Hz. 4. Configure generator: a. Set carrier frequency = 98 MHz. b. Select FM Modulation. i. Set FM Deviation = 22.5 kHz. ii. Set Source = LFGEN. iii. Set LFGEN Frequency = 1 kHz. c. Enable modulation. d. Enable carrier. 5. Adjust generator RF level, VRF0, until audio analyzer SINAD = 26 dB ±1 dB. 6. Sensitivity (dBμVemf) = VRF0. 3.2.3. Pass Criteria FM sensitivity should be below 10 dBµVemf. Table 1. FM Frequency Range Parameter Min Max Unit FM1 frequency range 87 108 MHz FM2 frequency range 86.5 109 MHz FM3 frequency range 87.3 108.25 MHz FM4 frequency range 76 90 MHz FM5 frequency range 64 87 MHz |
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