M52390 Mitsubishi, M52390 Datasheet - Page 13

• Manufacturer Part Number: M52390
• Description: NTSC/PAL ENCODER
• Manufacturer: Mitsubishi

(2) Setting of free run frequency
In this IC, the VCXO circuit generates fsc. Therefore, set the
oscillator frequency of VCXO to fsc as follows before using this IC.
1) Connect pin
2) V4 is the voltage at pin
3) Set pin
4) Set the output frequency at pin
(3)Setting of chroma difference LPF
The frequency characteristics of the chroma difference LPF which
is built in this IC can be set as shown in Fig. 1 by connecting a
resistor externally to pin
The group delay characteristics also change as shown in Fig. 2.
pin
R).
trimmer capacitor at pin
2
(C.Sync IN). Apply voltage V4 - 0.5V to pin
2
Fig. 1 Frequency characteristics of
(As for the test conditions, refer to test No.14 and 15.)
500
400
300
200
100
-12
-18
-24
-30
(C.Sync IN) to H. (5V is applied.)
Fig. 2 Group delay characteristics of
(As for the test conditions, refer to test No.14 and 15.)
-6
0
6
0
100k
9
(VIDEO IN) to GND and set it to free run mode.
color difference LPF
5 10
color difference LPF
20
7
(fc CONT.).
4
20
(VCXO IN).
(OFFSET R) when sync is input to
Pin
30
1M
20
60k
5
R (k )
50k
(TRAP) by adjusting the
40
40k
30k
20k
50
10k
5k
4
60
10M
(OFFSET
(4) Setting of Y DL
output changes by connecting a resistor externally to pin
CONT.). Therefore, set Y DL based on the delay volume (group
delay volume derived from group delay characteristics + 40ns).
In case that a trap circuit is connected to pin
from +5 to +10ns into consideration.
(5) Color control characteristics
voltage to pin
Gain in chroma section can be set as shown in Fig. 3 by applying
The group delay characteristics of color signal of RGB encode
connecting DR externally to pin
(6) Relation between BFP and HHK
The pulse width of GFP and HHK can be set as shown in Fig. 4 by
130
120
Fig. 4 RC product at pin
110
100
Fig. 3 Color control characteristics
(As for the test conditions, refer to test No.16, 17, 18 and 19.)
(As for the test conditions, refer to test No.35, 36 and 37.)
90
80
70
Time interval from sync rise at pin
-1
-2
-3
3
0
2
1
0
0
BFPP BFPW
5.6 s
2.5 s
19
10
(COLOR CONT.). (The burst amplitude is fixed.)
1
20
Voltage at pin
MITSUBISHI ICs (AV COMMON)
2
HHK
30
3
3
3
40
(HHK).
vs. internal pulse
19
NTSC/PAL ENCODER
2
4
47 s
50
(47 sec)
M52390FP
5
60
5
3
, take the delay
270p
5V
0V
pin
20
2
(fc
Sync
R