National Instruments PXI-6289 User Manual page 260

Synchronization
Time
t 80 MHz Source
4
Other Internal
Source
External Source
Input Requirements
Refer to the Figure B-41 for the M Series counter/timer circuitry.
Source Period and Pulse Width
Figure B-46 and Table B-30 show the timing requirements for Counter n Source. The
requirements depend on the synchronization mode.
Figure B-46. Counter n Source Timing Requirements
Counter n Source
Time
Counter n Source Period
t
5
Table B-29. Selected Gate to Count Enable Delays
Gating
Mode
Edge
Level
Edge
Level
Edge
Level
Table B-30. Counter n Source Timing
Description
Mode Min (ns)
-1.0
1/2 Source Period -
1 ns
1/2 Source Period -
2.5 ns
t
5
t
6
Synchronization
Mode
80 MHz Source
Other Internal
Source
External Source
M Series User Manual
0.5
1/2 Source Period +
1/2 Source Period –
7.5
6.0
t
6
Min (ns)
12.5
25.0
50.0
© National Instruments | B-35
Max (ns)
5.0
0.5
3 ns
1 ns
22.0
18.0
*
Max (ns)
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