National Instruments Tables8 and 9 describe the different conditions indicated by the two NI PXI LEDs.

© National Instruments Corporation 25 NI Digital Waveform Generator/Analyzer Guide
Tables8 and 9 describe the different conditions indicated by the two
NI PXI LEDs.
1, 4, 7, 10, 13,
16, 19, 22, 25,
28, 31, 34, 37,
40, 43, 46, 49,
52, 55, 58
GND Ground Ground reference for signals.
11, 12, 68, 69 RESERVED N/A These terminals are reserved for
future use. Do not connect to
thesepins.
Table 7. NI 654X/655X/656X SMB Connectors
Connector
Signal
Name
Signal
Type Description
CLK IN Reference/
Clock Input
Control Terminal for the external Reference
clock used for the PLL or for the
external Sample clock used for
pattern generation and/or
acquisition.
PFI 0 Programmable
Function
Interface
(PFI) 0
Control Input terminal to the device for
external triggers, or output terminal
from the device for events.
CLK OUT Reference/
Clock Output
Control Terminal for the exported PLL
Reference clock or the exported
Sample clock.
Table 8. ACTIVE LED Indicators
Color Indications
Off Device not armed, not triggered, or experiencing an error.
Amber Device armed and awaiting Start trigger. If performing a
dynamic acquisition operation, the device may be acquiring
pretrigger samples.
Green Device received Start trigger.
Red Error condition.
Table 6. NI 656X DDC Connector Pins (Continued)
Pins Signal Name
Signal
Type Signal Description