SI47XX-EVB Datasheet, PDF (70/164 Pages) Silicon Laboratories – Thank you for purchasing the Silicon Laboratories

Si47xx-EVB
Table 15. FM Receiver Settings Property Window Descriptions (Continued)
Items
Seek Band Top
(MHz)
Max Tune Error
(kHz)
Seek Mode
Seek RSSI
Threshold (dBuV)
Seek SNR
Threshold (dB)
Spacing
Soft Mute Attack
Rate
(dB/s)
Soft Mute
Attenuation Slope
(dB/dB)
Soft Mute Max
Attenuation (dB)
Soft Mute Release
Rate
(dB/s)
Soft Mute SNR
Threshold (dB)
Soft Mute Rate
Description
The upper frequency limit for the seek
function. This is set automatically by the
GUI based on band and spacing selection.
Selects the maximum tuning frequency
error before the AFC rail indicator is set.
Select between stopping the seek at the
band limits or wrapping at the band limits to
return to the starting frequency.
The seek RSSI threshold level used for
seek and scan functions.
The seek SNR threshold level used for seek
and scan functions.
Channel spacing
Sets the attack rate for entering soft mute.
Soft mute attenuation slope specifies the
slope of the attenuation curve when the
signal SNR is below the soft mute SNR
threshold. It is specified as dB/dB where the
attenuation applied is simply the value
specified here times the amount the signal
SNR is below the threshold.
Maximum attenuation for soft mute.
Sets the release rate for leaving soft mute.
SNR threshold level used to engage soft
mute.
Selects the soft mute rate.
Range
US: 107.9 MHz
(200 kHz
spacing)
Europe:
108 MHz
(100 kHz
spacing)
Japan: 90 MHz
Japan Wide:
108 MHz
0–255 kHz
Applicable Devices
All
All
Stop at limit or
All
wrap at limit
0–255 dB
All
0–255 dB
All
50, 100, or
200 kHz
1–31999 dB/s
1–63
All
Si4706-C30 and later,
Si4740/41/42/43/44/45,
Si4704/05/30/31/34/35/84/
85-D50 and later
Si4704/05/06/3x-C40 and
later, Si4740/41/42/43/44/45
0–31 dB,
0 = disable soft
mute
1–31999 dB/s
0–15 dB
All except Si4749
Si4706-C30 and later,
Si4740/41/42/43/44/45,
Si4704/05/30/31/34/35/84/
85-D50 and later
All except Si4749
1–255 dB
Si4706/07/20/21/84/85-B20
and earlier,
Si4704/05/30/31/34/35-C40
and earlier
70
Rev. 0.8