8.If the voltage changes incorrectly, proceed as follows:
a.Check the -10Vdc reference (A3U409 pin 4).
b.While using the front-panel knob to adjust the video trigger level, check for the presence of pulses on A3U409 pin 15 (LDAC2).
c.While using the front-panel knob to adjust the video trigger level, check for the presence of pulses on A3U409 pin 16 (LWRCLK).
d.Check that pulses are present on U409 pin 6 (IAO).
9.If the LWRCLK and LDAC2 signals are not correct, refer to “Interface Strobe Select” in this chapter.
7-10 ADC/lnterface Section
