SMART Embedded Computing MVME3100 Installation And Use Manual page 40

Switches and Indicators
Table 2-3
Function
MPC8540
Ready
GENET 1
Link Quality
GENET 2
Link Quality
38
Additional On-board Status Indicators (continued)
Label Color
DS3
Green
(silkscreen)
Off
Slow
Blink
DS2 Green
(silkscreen) Fast
Blink
Green
Green
[Same as
DS3
DS2}
MVME3100 Single Board Computer Installation and Use (6806800M28H)
Description
Indicates that the MPC8540 has completed the reset
operation and is not in a power-down state. The MPC8540
Ready is multiplexed with the MPC8540 TRIG_OUT so
the LED can be programmed to indicate one of three
trigger events based on the value in the MPC8540 TOSR
register.
Extremely poor Signal to Noise ratio - cannot receive data
Poor SNR - receive errors detected
Fair SNR - close to data error threshold
Good SNR on link
Startup and Operation