Philips CEM2000/00 Service Manual page 69

9.2 AM IF-processing
9.1.1 Channel selection filter
Symbol Parameter
CSF BW Channel selection filter BW
9.2.1 Soft mute
(continuous set)
Symbol Parameter
SMsp Start point vs. field strength
SMep End point vs. field strength
SMd Depth
Transition time for field
SMtauatt strength-dependent soft mute
activation
Transition time for field
SMtaurel strength-dependent soft mute
release
9.2.2 High cut control
(continuous set)
Symbol Parameter
HCFSsp Start point vs. field strength
HCFSep End point vs. field strength
Field strength-related
HCFStW2N transition time from wide to
narrow band
Field strength-related
HCFStN2W transition time from narrow to
wide band
Maximum cut-off frequency of
HCmaxBW
high cut filter bank
Minimum cut-off frequency of
HCminBW
high cut filter bank
HCnumFilt Number of discrete HC filters
Test Condition, Comments
response: - 3dB
Test Condition, Comments
audio atten = 1 dB
read "FM_softmute"
no adjacent channel present
audio atten = SMd + 1 dB
read "FM_softmute"
no adjacent channel present
Test Condition, Comments
minimum RF level for widest
HC filter (filter # 7)
no multipath present
maximum RF level for
narrowest HC filter (filter # 0)
no multipath present
Vrf step-like variation from 60
dBu to 10 dBu
Vrf step-like variation from 0
dBu to 60 dBu
Filter #7, -3 dB response
frequency, input signal with
pre-emphasis
Filter #0, -3 dB response
frequency, input signal with
pre-emphasis
-
Rev. 1.0
TDA7703/TDA7703R
Range
Min Typ Max
- ±3.7 -
Range
Min Typ Max
0 25 40
0 0 30
-40 -24 0
0.001 0.1 10
0.001 3 10
Range
Min Typ Max
0 40 50
0 30 50
0.001 0.2 20
0.001 10 20
HCmin
TBD TBD
BW
HCma
TBD TBD
xBW
- 8 -
Units
kHz
Units
dBu
dBu
dB
s
s
Units
dBu
dBu
s
s
kHz
kHz
-
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