A N 5 4 3
118
Rev. 0.9
Property 0x2103 FM_NB_SECONDARY_DETECT_THRESHOLD
The FM_NB_SECONDARY_DETECT_THRESHOLD property sets the threshold for secondary (IF) noise blanker.
The noise blanker is triggered when the IF signal’s average-to-peak ratio is no more than
FM_NB_SECONDARY_DETECT_THRESHOLD / 32767. The recommended average-to-peak ratio 10%, which is
equivalent to setting this property to 32767. The CTS bit (and optional interrupt) is set when it is safe to send the
next command. This property may only be set or read when in the powerup mode.
Si475x-A40 and earlier, this property is not available.
Si475x/5xC-A55, Default: 0
Units: None
FM_NB_SECONDARY_DETECT_THRESHOLD
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
SECONDARY_DETECT_THRESHOLD[15:0]
0x0000
Bit
Name
Function
15:0
SECONDARY_DETECT_
THRESHOLD[15:0]
The percentage is a fractional Q15 number. Recommended
setting is 14%, which is equivalent to setting this property to
0x11EC.
Default is 0.
Range is 0
–
32767.
0 = Disable the secondary noise blanking (IF) engine.
