Filter
Top Products
Adjustment Procedures
5-48
2715 Spectrum Analyzer Service Manual
Color burst
Figure 5- 18: Typical Video Waveform
12. Adjust the Video Demod L11 slug so the amplitude of the color burst
remains constant as the AFC is toggled ON and OFF by pressing 7. Refer to
Figure 5--18.
13. Toggle the AFC to the ON position.
14. Set the test spectrum analyzer as follows:
Center Frequency 45.7 MHz
Span/Div 200 kHz
Resolution 100 kHz
15. Adjust L11 to position the visual carrier signal seen on the test spectrum
analyzer to center screen (45.7 MHz +
50 kHz).
16. Toggle the AFC (off -- on) and verify that the frequency shift of the signal
seen on the test spectrum analyzer is <150 kHz.
17. Remove the cable to the 2715 RF INPUT.
18. Activate the 2715 QUERY LOCK STATUS by pressing 9.
19. Verify that line 9 status indicates UNLOCKED.