External Trigger Inputs; External Trigger Trig Front Panel Connector - Teledyne ADQ8-4X Manual

2.
DisArmTrigger
3. ("software trigger")
SetTriggerMode
4.
ArmTrigger
5.
SWTrig
6. Read data and analyze the situation

4.8 External Trigger Inputs

An external trigger is a dedicated signal on a dedicated input to the ADQ. There are several inputs for
external trigger, Table 2.
CONNECTOR DESCRIPTION
TRIG External trigger on
front panel.
SYNC Sync signal on front
panel.
STARB Backplane trigger in
PXIe systems.
Requires trigger-timing
card.
Table 2: External trigger inputs.
1. 500  option available on MTCA form factor only.
4.8.1

External trigger TRIG front panel connector

The block diagram for the TRIG is shown in
user can control the external trigger function for adapting it to the system in the following ways:
The input impedance can be set in 50  (default) or high impedance 500  mode, see
•
4.8.3.
• Configure the threshold level.
• Set the trigger edge to rising or falling to adjust to the polarity of the trigger signal.
*+,
+-    
0 1
# DESCRIPTION
a The input is available on an SMA connector on the front panel.
The input impedance can be set as 50  (default) or high
b
impedance 500 .
c The trigger threshold is 0.5 V (default) and user-controlled.
d High speed comparator.
e Select rising or falling edge.
Figure 12: External trigger on front panel.
19-2302 A
2020-09-16
TIME
RESOLUTION
250 ps
4 ns
4 ns
Figure 12
   # 
( -
01 01
TOTAL IMPEDANCE
JITTER
50  / 500 
76 ps
1.2 ns
1
50  / 500 
1.2 ns PXIe standard
and related parameters are listed in
01
USER COMMAND
SetTriggerInputImpedance
SetTriggerThresholdVoltage
SetExternTrigEdge
ADQ8-4X Manual
19-2302 A 2020-09-16
21(46)
TRIG REF
LEVEL
SW contr. 4.8.1
SW contr. 4.8.2
PXIe 4.9.1
standard
Table 2. The
Section
*# ./   
0 1
REF
4.8.3
21(46)