ADLINK PXES-2590 - Manual (Page 27)

Introduction 17
PXES-2590
Figure 1-14: PXES-2590 Backplane Indicators
Table 1-4: Backplane Indicator Legend
The PXES-2590 PXI chassis automatically selects the 10 MHz
reference clock source from
Z Built-in accurate 10 MHz clock source
Z External 10 MHz clock through a BNC connector
Z
PXI_CLK10_IN pin on the system timing slot
Priority of 10MHz reference clock is as follows
Left LED (LED 1),
VCXO present
Middle LED (LED 2),
external clock
present
Right LED (LED 3),
phase-lock complete
Lights when the
onboard VCXO is
operating, should be
lit at all times Lights when external
10MHz clock is
present, including
from BCN connector
on rear panel and
from system timing
slot Lights when the
external 10MHz clock
is phase locked by
PLL circuit