Philips CEM2000/00 Service Manual page 68

9.1.4 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
HCMPsp Start point vs. multipath
HCMPep End point vs. multipath
multipath -related transition
HCMPtN2W time from narrow to wide
band
multipath -related transition
HCMPtW2N
time from wide to narrow
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
(1): depends only on field strength filter time constant
(2): means that 100% equivalent 19 kHz AM modulation depth will not achieve full band narrowing
(3): intermediate filters (#6 - #1) cut-off frequencies exponentially spaced between HCmaxBW and HCminBW
9.1.6 De-emphasis filter
(discrete set)
Symbol Parameter
De-emphasis time constant 1
DEtc
De-emphasis time constant 2
9.1.7 Stereo decoder
Symbol Parameter
PilSup Pilot signal suppression
SubcSup Subcarrier suppression
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
minimum RF level for widest
HC filter (filter # 7)
equivalent 19 kHz AM
modulation depth;
field strength = 80 dBu
maximum RF level for
narrowest HC filter (filter # 0)
equivalent 19 kHz AM
modulation depth;
field strength = 80 dBu
Vrf step-like variation from 20
dBu to 80 dBu
Vrf step-like variation from 80
dBu to 20 dBu
Filter #7, -3 dB response
frequency, input signal with
pre-emphasis
Filter #0, -3 dB response
frequency, input signal with
pre-emphasis
-
Test Condition, Comments
-
-
Test Condition, Comments
Pilot 9%, 19Khz, ref=40Khz
F = 38 Khz
F = 57 Khz
F = 76 Khz
Rev. 1.0
TDA7703/TDA7703R
Range
Min Typ Max
0 50 50
0 30 40
(1)
(1)
14 100
(2)
5 10 150
(2)
5 30 150
0.001 0.001 20
0.001 0.001 20
HCmin
14 18
BW
HCma
0.1 3
xBW
(3)
- 8 -
Range
Min Typ Max
- 50 -
- 75 -
Range
Min Typ Max
- 60 -
- 70 -
- 70 -
- 80 -
Units
dBu
dBu
-
s
%
%
s
s
kHz
kHz
-
Units
us
us
Units
dB
dB
dB
dB
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