tda5670-5x ETC-unknow, tda5670-5x Datasheet - Page 16

• Manufacturer Part Number: tda5670-5x
• Description: Video Modulator Fm/am-audio With Pll-output
• Manufacturer: ETC-unknow

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
.