Philips Components
Desktop video & FM radio module
system M, N
Preliminary specification
FM1236
handbook, full pagewidth
aerial
connector
TP2 TP3
9 10 11 12 13 14 15
IF
output
IF
PROBE
OUT
20 21 22 23 24 25
5V
VT
VS
BU2
SCL
SDA
220 220
22
Ω
1
nF
nF
nF
3
47
kΩ
39
39
µF 47
kΩ
kΩ
kΩ
33
10
µF
nF
65
1/2 TDA1308 − +
23
−+
1 47
µF kΩ
240 4 240
kΩ
7 kΩ
8
1 1/2 TDA1308
+ 47
µF
22
Ω
+ 47
µF
22
Ω
220
220
kΩ
kΩ
TEST JIG
CCA506
BU7
BU8
S1
15 kHz
LOW-PASS
FILTER
DA
BU5
P
BU4
video
out
BU2
BU6
+5 V
15 5
nF kΩ
(2)
(1)
SA
DA
(1) BU4 loaded with 75 Ω.
(2) 75 µs de-emphasis.
SA = Spectrum Analyzer.
P = FET probe.
DA = Distortion Analyzer.
VAC = dual channel AC voltmeter (Zi = 600 Ω)
The minimum load impedance required at the CVBS output (pin 23) is 75 Ω (both AC and DC).
Fig.2 Typical test set up.
1997 Feb 03
8