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Adjustment Procedures
2715 Spectrum Analyzer Service Manual
5-51
E/O Output Check. Use this procedure to check the E/O Output.
1. Move the test oscilloscope channel 2 probe to pin 23 of the extender.
2. Looking at the test oscilloscope screen, verify the following:
a. E/O Output waveform (test oscilloscope CH 2) resembles a 0 to + 5 V
square wave. Refer to Figure 5--21.
b. E/O Output changes state with each video vertical sync pulse (CH 1).
c. E/O Output is locked to video vertical sync pulse. (No erratic behavior
occurs.)
CH 1
500 mV/DIV
(VIDEO)
CH 2
5 V/DIV
(E/O)
Figure 5- 21: E/O Output Waveform
3. Turn the 2715 POWER off. Reconnect the cables to the Video Demod board
and reinstall it without the extender board.