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Performance Verification
SPG 422 Service Manual (B034000 and above)
4–37
34. Burst Lock Phase Change with Input Burst Amplitude
≤
1
°
(Will remain locked with SNR > 30 dB)
a. Connect the equipment as shown in Figure 4–10.
b. Set the TG 2000 AVG1 to output a 0% flat field.
c.
Set the white noise generator to a minimum amount of inserted noise.
d. Display CH B1 on the waveform monitor.
e.
Use the waveform monitor to measure the signal to noise ratio of the
CH B1 (SPG 422 genlock input) signal.
f.
Set the waveform monitor noise cursor to 30 dB.
g. Add noise to the signal using the white noise generator until the
waveform monitor displays 30 dB of noise. Note the amount of inserted
noise from the noise generator. This value will be used later.
CH B1
CH 1
EXT
REF
Black 1
Genlock 2
SPG 422
1780
White Noise
Generator
TG 2000
BG1 Black Burst
AVG1 Output
Figure 4–10: Setup to check burst lock phase change
Summary of Contents for SPG 422
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Page 14: ...Service Safety Summary x SPG 422 Service Manual B034000 and above ...
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