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APE1553-1/2(-DS) Hardware Manual
2.5 Front Panel LED’s
Four sub miniature LED's indicates the various conditions of the module at the front
panel. The LED's are located in a quadruple LED-Array on the physical bus interface
daughterboard.
LED Name Colour
Description
FAIL1
Red
LED illuminates if an Error during the BIU 1 self-test occurs.
COUPLED /
ACTIVITY 1
Green - LED illuminates permanently if the MILbus channel 1 is connected.
- LED flashes if any MILbus Activity is detected by the Encoder/Decoder
of the MILbus channel 1.
FAIL2
Red
LED illuminates if an Error during the BIU 2 self-test occurs.
COUPLED /
ACTIVITY 2
Green - LED illuminates permanently if the MILbus channel 2 is connected.
- LED flashes if any MILbus Activity is detected by the Encoder/Decoder
of the MILbus channel 2.
Table 2.5-1: LED Descriptions
Figure 2.5-1: LED description