tda5670-5x ETC-unknow, tda5670-5x Datasheet - Page 16
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tda5670-5x
Manufacturer Part Number
tda5670-5x
Description
Video Modulator Fm/am-audio With Pll-output
Manufacturer
ETC-unknow
Datasheet
1.TDA5670-5X.pdf
(22 pages)
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Test Circuit 6
Description of the Measurement Configuration to Measure the Modulation Depth
for Positive and Negative Modulation
Calibration:
Measuring:
Semiconductor Group
A zero reference signal with the TV-measuring receiver is given to the video signal.
A video signal with
1) Modulation depth
value
2) Modulation depth
white value – sync level in relation to range zero reference – peak white value gives
m
D/P
.
–
sync level in relation to range zero reference
V
vid
m
m
D/N
D/P
= 1 Vpp is connected to the video input.
for negative modulation: pin 14 open, range peak white
for positive modulation: pin 14 to ground, range peak
16
–
sync level gives
TDA 5670-5X
m
D/N
.