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NI Digital Waveform Generator/Analyzer Getting Started Guide
Tables 8 and 9 describe the different conditions indicated by the two NI PXI LEDs.
Table 7.
NI 654
x
/655
x
/656
x
Front Panel SMA/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
dynamic 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 and not triggered.
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 9.
ACCESS LED Indicators
Color
Indications
Off
Device not ready.
Amber
Device being accessed by software.
Green
Device ready to be programmed.
Red
Running the niHSDIO Self Test VI or calling
niHSDIO_self_test
produced a failure.