TDA7705 Weak signal processing
Doc ID 15938 Rev 9 37/42
5.2.3 High cut control
Table 35. High cut control
(continuous set)
Symbol Parameter Test condition Min Typ Max Units
HCFSsp Start point vs. field strength
minimum RF level for widest
HC filter (filter # 7)
no multipath present
04050dBµV
HCFSep End point vs. field strength
maximum RF level for
narrowest HC filter (filter # 0)
no multipath present
03050dBµV
HCFStW2N
Field strength-related
transition time from wide to
narrow band
V
rf
step-like variation from
60 dBµV to 10 dBµV
0.001 0.2 20 s
HCFStN2W
Field strength-related
transition time from narrow to
wide band
V
rf
step-like variation from
0 dBµV to 60 dBµV
0.001 10 20 s
HCmaxBW
Maximum cut-off frequency of
high cut filter bank
Filter #7, -3 dB response
frequency, input signal with
pre-emphasis
HCmin
BW
14 18 kHz
HCminBW
Minimum cut-off frequency of
high cut filter bank
Filter #0, -3 dB response
frequency, input signal with
pre-emphasis
13
HCma
xBW
kHz
HCnumFilt Number of discrete HC filters - 8 - -
