Technical data

4-12 Chapter 4

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Digital Control

Observe the Power Up Sequence

Switch the analyzer power off, then on. The following should take place within a few

seconds:

• On the front panel, observe the following:

1. All six amber LEDs illuminate.

2. The amber LEDs go off after a few seconds, except the CH1 LED. See Figure 4-5.

• The display should come up bright with no irregularity in colors.

• After an initial pattern, five red LEDs on the A9 CPU board should remain off. They can

be observed through a small opening in the rear panel.

If the power up sequence does not occur as described, or if there are problems using the

front panel keyboard, refer to Chapter 6 , “Digital Control Troubleshooting.”

Figure 4-5 Front Panel Power Up Sequence