Measurement Computing Data Acquisition Systems rev.10.4 - Manual (Page 39)

Programmer’s Manual 908494 Using Multiple Devices 3-3
Synchronous Operation of Multiple Devices
The following sections describe methods for synchronizing input data with multiple DaqX compatible
devices. Three synchronization methods will be discussed:
o
Internal Clock Method
o
Master Clock Method
o
External Clock Method
The synchronization method available depends upon the device, i.e., its ability to be externally triggered
or externally clocked. The following table shows the capabilities of each device as well as the physical
location of the external trigger and pacer input/output clocks.
Device External TTL Trigger External Acquisition
Pacer Clock
Min. External
Clock Interval
Acquisition Pacer
Clock Output
WaveBook/512 Yes (pin 13 on DB25F) No NA No
WaveBook/516 Yes (pin 13 on DB25F) Yes (pin 20 on DB25F) 1us (1MHz) No
DaqBooks Yes (P1; pin 25) No NA No
Daq PC-Card Yes (P1; pin 25) No NA No
DaqBoard(ISA) Yes (P1; pin 25) No NA No
TempBook Yes No NA No
DaqBoard/500 Series Yes (pin 6 on SCSI ;
TTLTRG on TB-100) Yes (pin 2 on SCSI ;
XAPCR on TB-100) 5us (200kHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
DaqBoard/1000 Series Yes (pin 6 on SCSI ;
TTLTRG on TB-100) Yes (pin 2 on SCSI ;
XAPCR on TB-100) 5us (200kHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
DaqBoard/2000 Series
1 Yes (P1; pin 25)
Note 2
Yes (P1; pin 20)
Note 2
5us (200kHz) Yes (P1;pin 20)
Note 2
DaqBoard/2000c Series
1 Yes (P1; pin 25)
Note 2
Yes (P1; pin 20)
Note 2
5us (200kHz) Yes (P1; pin 20)
Note 2
DaqBook/2000 Series Yes (P1; pin 25)
Note 3
Yes (P1; pin 20)
Note 3
5us (200kHz) Yes (P1; pin 20)
Note 3
DaqScan/2000 Series Yes (P1; pin 25) Yes (P1; pin 20) 5us (200kHz) Yes (P1; pin 20)
DaqLab/2000 Series Yes (P1; pin 25) Yes (P1; pin 20) 5us (200kHz) Yes (P1; pin 20)
DaqBoard/3000 Series Yes (pin 6 on SCSI;
TTLTRG on TB-100) Yes (pin 2 on SCSI ;
XAPCR on TB-100) 1us (1MHz) Yes (pin 2 on SCSI ;
XAPCR on TB-100)
Synchronization Methods Available
Device Internal Clock
Method
Master Clock
Method
External Clock
Method
WaveBook/512 Yes No No
WaveBook/516 Yes Slave only Yes
DaqBooks Yes No No
Daq PC Card Yes No No
DaqBoard(ISA) Yes No No
TempBook Yes No No
DaqBoard/500 Series Yes No Yes
DaqBoard/1000 Series Yes Master or Slave Yes
DaqBoard/2000 Series
Note 1
Yes Master or Slave Yes
cPCI DaqBoard/2000c Series
Note 1
Yes Master or Slave Yes
DaqBook/2000 Series Yes Master or Slave Yes
DaqScan/2000 Series Yes Master or Slave Yes
DaqLab/2000 Series Yes Master or Slave Yes
DaqBoard/3000 Series Yes Master or Slave Yes
Notes:
1 Excludes DaqBoard/2003 and cPCI DaqBoard/2003c.
2 The P1 connector for DaqBoard/2000 Series and DaqBoard/2000c Series boards is obtained by connecting a
DBK200 Series option to the board’s P4 connector.
3 DaqBook/2020 has a BNC connector for External TTL Trigger and a BNC connector for the external pacer clock.
These BNC connectors are in addition to P1 connector pins 25 and 20.