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Si47xx-EVB
Table 15. FM Receiver Settings Property Window Descriptions (Continued)
Items
Hi-Cut SNR High
Threshold
Description
Sets the SNR level at which hi-cut begins to
band limit.
Range
0 – 127 dB
Applicable Devices
Si4740/41/42/43/44/45,
Si4704/05-D50 and later,
Si4706-C30 and later,
Si4730/31/34/35/84/85-D50
and later
Hi-Cut SNR Low
Threshold
Sets the SNR level at which hi-cut reaches
maximum band limit.
0–127 dB
Si4740/41/42/43/44/45,
Si4704/05-D50 and later,
Si4706-C30 and later,
Si4730/31/34/35/84/85-D50
and later
Noise Blanker Delay Delay in microseconds before applying
noise blanking to the original samples.
125–219 μs
Si4742/43/44/45
Noise Blanker
Detect Threshold
Sets the threshold for detecting impulses in
dB above the noise floor. If set to 0, impulse
0 – 90 dB
Si4742/43/44/45
noise blanking is disabled.
Noise Blanker IIR
Filter
Sets the cut-off frequency for the low pass
filter that is used for noise floor estimation in
300–1600
Si4742/43/44/45
noise blanker detection.
Noise Blanker
Interval
Interval original samples are replaced by
interpolated clean samples.
8 – 48 μs
Si4742/43/44/45
Noise Blanker Rate Maximum noise blanking rate.
100 – 6400 Hz
Si4742/43/44/45
Antenna Type
Receive antenna selection.
Headphone or
Si4704/05/06/20/21 only
short antenna
Channel Filter
Selects the channel filter to be used before
Automatic,
Si4706, Si4749, Si4704/05/
demodulation.
110 kHz, 84 kHz, 30/31/34/35/84/85-D50 and
60 kHz, and
40 kHz
later
Band
Frequency band
US/Europe:
All
87.5–108 MHz
Japan: 76–
90 MHz
Japan Wide: 76–
108 MHz
Seek Band Bottom The lower frequency limit for the seek
US/Europe:
All
(MHz)
function. This is set automatically by the
GUI based on band and spacing selection.
Rev. 0.8
87.5 MHz
Japan: 76 MHz
Japan Wide:
76 MHz
69
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