BCM4339 Preliminary Data Sheet
FM Receiver Specifications
Table 38: FM Receiver Specifications (Cont.)
Minimum l
Typica
Parameter
Conditionsa
Maximum Units
Mono stereo blend and
switching
Blending and switching is dynamically
proportional to the FM wanted input
signal C/N. The blending and switching
characteristics are fully programmable.
Refer to “Audio Features” on page 66 for
further details.
Pilot suppression
Vin = 66 dBµV EMF (2 mV EMF),
∆f = 75 kHz, fmod = 1 kHz
46
–
–
dB
Pause detection
Audio level at which a
pause is detected
Relative to 1 kHz tone, ∆f = 22.5 kHz
Four values in 3 dB steps
Four values
–
–
–
–
–
–
–21
20
–12
40
dB
ms
Audio pause duration
a. Following conditions are applied to all relevant tests unless otherwise indicated: Pre-emphasis and de-emphasis
of 50 us, R = L for mono, DAC Load > 20 kꢀ, BAF = 300 Hz to 15 kHz, and A-weighted filtering applied.
b. Contact Broadcom regarding applications that operate between 65 and 76 MHz.
c. Wanted Signal: ∆f = 22.5 kHz, and fmod = 1 kHz.
d. Interferer: ꢁf = 22.5 kHz, and fmod = 1 kHz.
e. RDS sensitivity numbers are for 87.5–108 MHz only.
f. Vin = ꢁf = 32 kHz, fmod = 1 kHz, ꢁf Pilot = 7.5 kHz, and 95% of blocks decoded with no errors after correction
g. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 22.5 kHz, fmod = 1 kHz, and ꢁf Pilot = 6.75 kHz.
h. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 100 kHz, fmod = 1 kHz, and ∆f Pilot = 6.75 kHz.
i. Vin = 66 dBµV EMF (2 mV EMF), ∆f = 22.5 kHz, and fmod = 1 kHz.
Broadcom®
November 17, 2014 • 4339-DS106-R
Page 137
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