M61206FP Datasheet, PDF (37/51 Pages) Mitsubishi Electric Semiconductor – NTSC TV SIGNAL PROCESSOR

MITSUBISHI ICs (TV)
M61206FP
NTSC TV SIGNAL PROCESSOR
DEFLECTION BLOCK
fH1 : Horizontal free-running frequency 1
fH2 : Horizontal free-running frequency 2
fH3 : Horizontal free-running frequency 3
Measure the output frequency at pin 7 when no signal is
input.
Hfree : Forced horizontal free-running frequency
1. Input SG.A to pin 34.
2. Set H-free control data to 'ON', and measure the output
frequency at pin 7.
FPHU : Horizontal pull-in range (upper)
FPHL : Horizontal pull-in range (lower)
1. Input SG.H to pin 34.
2. Change the frequency of SG.H, and measure the
frequency at the moment when the output signal at pin 7 and
the input signal at pin 34 are pulled in. The horizontal pull-in
range is measured by comparing with the horizontal
frequency of video signal.
HPT1 : Horizontal pulse timing 1
pin 34 : H-sync
Vfree : Forced vertical free-running frequency
1. Input SG.A to pin 34.
2. Set V-free control data to 'ON', and measure the output
frequency at pin 17.
SVC : Service mode function
Measure the output DC voltage at pin 17 when the service
switch is on.
FPVU : Vertical pull-in frequency (upper)
FPVL : Vertical pull-in frequency (lower)
Change the vertical frequency of SG.H and measure the
frequency when output waveform at pin 17 is pulled in.
VRsi : Vertical ramp size
VRsc1: Vertical ramp size control range 1
VRsc2 : Vertical ramp size control range 2
M
pin 17 : V-ramp
HPT1, HPT2, HPT3
pin 15 : H OUT
HPT2 : Horizontal pulse timing 2
HPT3 : Horizontal pulse timing 3
1. Measure the timing of horizontal pulse as same method in
HPT1.
2. HPT2 and HPT3 are defined as follows:
HPT2, HPT3 = (Measured value) - HPT1
HPTW : Horizontal pulse width
VH : Horizontal pulse amplitude
HPTW
VH ^{pin 15 : H OUT}
VRpo1 : Vertical ramp position control range 1
pin 34 : V-sync
VRpo1
pin 17 : V-ramp
VRpo2 : Vertical ramp position control range 2
1. Measure the timing of vertical ramp as same method in
VRpo1
2. VRpo2 is defined as follows:
VRpo2 = (Measured value) - VRpo1
VW : Vertical pulse width
pin 17 : V. PULSE
M
HSTO : Horizontal stop operation
Confirm that the horizontal output is high when the horizontal
stop switch is on.
VBLKW : Vertical BLK width
GND
Output waveform at
pins 14, 15 and 16
AFCG : AFC gain operation
1. Measure AFCon which is the output amplitude of pin 19
when AFC switch is on and AFCoff which is that when the
switch is off.
2. AFCG is defined as follows:
AFCon (Vp-p)
AFCG = 20 log
(dB)
AFCoff (Vp-p)
M
GND
WVSS : Minimum sync detection width
Reduce the width of signal SG.I and measure the width of
input signal when the output waveform at pin 17 loses lock
with SG.I.
fV : Vertical free run frequency
Measure the output frequency at pin 17 when no signal is
input.
MITSUBISHI
ELECTRIC
37