MM1029 Datasheet, PDF (4/5 Pages) Mitsumi Electronics, Corp. – S Video Amplifier

MITSUMI
S Video Amplifier MM1029
* Notes : 1 1. Voltage gain GV1, GV2, GV3
Given SG-1 input as V1 and TP11 output signal as V2, GV1 is obtained as follows.
The same applies for GV2 and GV3.
V2
GV1=20LOG
[dB]
V1
2. Frequency response fC1, fC2, fC3
For the same conditions as the GV1 measurement, given TP11 output for 0.1MHz as V3, and
for 5MHz as V1, FC1 is obtained as follows. The same applies for fC2 and fC3.
V4
FC1=20LOG
[dB]
V3
*2 Crosstalk Yin COUT CT1
Given TP14 input signal as V5 and TP7 output signal as V6, CT1 is obtained as follows.
V6
CT1=20LOG
[dB]
V5
*3 Crosstalk PB, PB YOUT CT2, CT3
Give TP2 and TP4 input signals as V7, and TP11 output signal as V8, CT2 and CT3 are obtained
as follows.
V8 ^*1
CT2=20LOG
-4 [dB]
V7
*1 When C is input to compare between YIN COUT and CIN YOUT, subtract the 4dB amp
portion from crosstalk.
*4 Crosstalk PB COUT CT4
Given TP4 input signal as V9 and TP7 output signal as V10, CT4 is obtained as follows.
V10
CT4=20LOG
[dB]
V9
*5 Input threshold voltage V insert input, character input VTH1, VTH2
For the same conditions as VMCY and VCHY measurement, raise TP13 and TP12 pulse levels
gradually. TP13 and TP12 pulse levels when V insert signal and character signal appear on TP11
are, respectively, VTH1 and VTH2.
*6 Input threshold voltage Chroma mute input VTH3
Gradually raise TP5 pulse level. TP5 pulse level when a sine wave is no longer output on TP7 is
VTH3.
*7 Sync separation level VSEPA
Gradually reduce SG-1 SYNC level from maximum to minimum. Measure the SYNC signal level at
TP14 when a sync separation signal is no longer output on TP15 to obtain VSEPA.
*8 Schmidt trigger threshold level VTH4H, VTH4L
Impress external DC voltage on TP1 and gradually raise from 0V. TP1 level when TP3 level goes
from high to low is VTH4H. Gradually lower from 5V. TP1 level when TP3 level goes from low to
high is VTH4L.
*9 Vertical sync output voltage VVH, VVL
TP3 low level for TTH4H measurement is VVL, and TP3 high level for VTH4L is VVH.