Table of Contents
Advertisement
Table of content
1
INTRODUCTION ........................................................................................................... 5
1.1
ADQ8-4X Architecture ................................................................................................... 5
1.2
Fundamental design properties ..................................................................................... 5
1.2.1 Data format .................................................................................................................................. 5
1.2.2 Calibration.................................................................................................................................... 6
1.2.3 Data acquisition nomenclature .................................................................................................... 6
1.2.4 Sampling clock frequency............................................................................................................ 6
1.2.5 System clocks.............................................................................................................................. 6
1.2.6 Analog signal range ..................................................................................................................... 7
1.3
Digitizer Studio overview................................................................................................ 8
2
SETTING UP THE ANALOG FRONT-END ................................................................... 9
2.1
ADQ8-4X AFE block diagram ........................................................................................ 9
2.2
Set analog input range................................................................................................... 9
2.3
Set analog DC-offset.................................................................................................... 10
2.4
Adjusting the digital gain and offset ............................................................................. 10
3
SIGNAL QUALITY ENHANCEMENT........................................................................... 11
3.1
Digital Baseline Stabilizer ............................................................................................ 11
4
TRIGGER..................................................................................................................... 12
4.1
Trigger block diagram .................................................................................................. 12
4.2
Introduction .................................................................................................................. 13
4.3
Position of the trigger in the data ................................................................................. 13
4.4
Timestamp ................................................................................................................... 14
4.4.1 Timestamp definitions................................................................................................................ 14
4.4.2 Timestamp reset ........................................................................................................................ 14
4.5
Blocking triggers for synchronization ........................................................................... 16
4.5.1 Function overview...................................................................................................................... 16
4.5.2 Block triggers once .................................................................................................................... 18
4.5.3 Windowing triggers .................................................................................................................... 18
4.5.4 Gating and windowing triggers .................................................................................................. 18
4.5.5 Programming sequence for using trigger blocking .................................................................... 18
4.6
Trigger jitter.................................................................................................................. 19
4.6.1 Trigger jitter definitions .............................................................................................................. 19
4.6.2 Asynchronous triggering ............................................................................................................ 19
4.6.3 Synchronous trigger................................................................................................................... 20
4.6.4 Extended trigger resolution........................................................................................................ 20
4.7
Software trigger............................................................................................................ 20
4.8
External Trigger Inputs................................................................................................. 21
4.8.1 External trigger TRIG front panel connector .............................................................................. 21
4.8.2 External trigger SYNC connector............................................................................................... 22
4.8.3 Driving the external TRIG/SYNC signal by controlling input impedance ................................... 22
4.9
External trigger in the backplane ................................................................................. 23
4.9.1 PXIe interface ............................................................................................................................ 23
4.10 Level trigger ................................................................................................................. 24
4.10.1Setting the level trigger level...................................................................................................... 25
4.10.2Level trigger and DBS................................................................................................................ 25
4.10.3Controlling noise sensitivity ....................................................................................................... 25
4.11 Internal trigger.............................................................................................................. 26
4.12 Trigger output............................................................................................................... 26
4.12.1Trigger output port selection ...................................................................................................... 26
19-2302 A
2020-09-16
ADQ8-4X Manual
19-2302 A 2020-09-16
2(46)
2(46)
Advertisement
Table of Contents
