28 Hardware Description
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Stacking LEDs
The stacking LEDs indicate the unit’s position in the stack. As shown in the front panel
illustrations at the start of this section, the stacking LEDs are numbered 1 through 6. Each
unit in the stack has one stacking LED lit, indicating its position in the stack. When
stacking LED 1 is lit, the unit is the master unit. When one of the stacking LEDs
numbered 2 through 6 is lit, the unit is the corresponding stacking member unit.