4 sampling rate control, 5 timebase exporting, Sampling rate control – ADLINK PXI-2022 User Manual
Page 38: Timebase exporting, 30 function block and operation theory
30
Function Block and Operation Theory
4.3.4
Sampling Rate Control
By specifying different scan interval counter (32-bit) value, differ-
ent sam-pling rate can be achieved. The following formula deter-
mines the ADC sampling rate. Sampling Rate = TIMEBASE/Scan-
Intrv Where ScanIntrv is scan interval counter, value can be 4, 5,
6, 7, .... 2
32-1
.
Figure 4-5: Configuring Different Sampling Rate of PXI-2022.
4.3.5
Timebase Exporting
The PXI-2020/2022 can export timebase to one of the PXI trigger
bus line 0. By software programming, you can pick up a trigger line
to transmit timebase clock. This feature is very useful when syn-
chronize to multiple measurement modules.
TIMEBASE
DATA
D1
Acquisition
In Progress
Trigger
Acquisition starts right after this clock edge
D1
ScanIntrv = 1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D2
D3
D4
D5
D6
D1
D2
D3
D4
ScanIntrv = 2
ScanIntrv = 3