34
CN11
19 17 15 13 11 9 7 5 3 1
20 18 16 14 12 10 8 6 4 2
PCB
Signal Name
Direction
Description
Location
SSI_TIMEBASE
Input/Output
Timebase signal
through SSI
pin 1
SSI_TRIG1
Input/Output
Trigger signal through
SSI
pin 11
SSI_TRIG2
Input/Output
Clocked trigger signal
through SSI
pin 9
SSI_START_OP
Input/Output
Acquisition start
signal in pre-trigger
or middle trigger
mode
pin 7
GND
-
Ground
pins 2, 4, 6, 8, 10, 12,
14, 16, 18, 20
NC
-
No Connection
pins 3, 13
Reserved
Input/Output
Reserved for future
use
pins 5, 15, 17, 19
Table 3-5: SSI Signal Locations and Pin Definition
3.7.1 SSI_TIMEBASE
As an output, the SSI_TIMEBASE signal outputs the onboard LVTTL timebase through PXI
trigger bus.
As an input, the PCI/PXI-69816/26/46 accepts the SSI_TIMEBASE signal to be the source of
timebase.
3.7.2 SSI_TRIG1
As an output, the SSI_TRIG1 signal reflects the trigger event signal in an acquisition
sequence. You can use the function SSI_Source Conn() to output the SSI_TRIG1 signal.
As an input, the PCI/PXI-69816/26/46 accepts the SSI_TRIG1 signal to be the trigger event
source. The signal is configured in the rising edge-detection mode. When selecting the
trigger sources of the PCI/PXI-69816/26/46, you can select TRSRC_SSI_1 to set SSI_TRIG1 as
the source of trigger event.
