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