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Table 7-5. synchronization mode conditions, 80 mhz source mode, Figure 7-35. 80 mhz source mode – National Instruments Network Device DAQ S User Manual

Page 110: 80 mhz source mode -38

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Chapter 7

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NI 6124/6154 User Manual

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In DAQmx, the device uses 80 MHz source mode if you perform the
following:

Perform a position measurement

Select duplicate count prevention

Otherwise, the mode depends on the signal that drives Counter n Source.
Table 7-5 describes the conditions for each mode.

80 MHz Source Mode

In 80 MHz source mode, the device synchronizes signals on the rising edge
of the source, and counts on the following rising edge of the source,
as shown in Figure 7-35.

Figure 7-35. 80 MHz Source Mode

Table 7-5. Synchronization Mode Conditions

Duplicate Count

Prevention Enabled

Type of

Measurement

Signal Driving

Counter n Source

Synchronization

Mode

Yes

Any

Any

80 MHz Source

No

Position Measurement

Any

80 MHz Source

No

Any

80 MHz Timebase

80 MHz Source

No

All Except Position
Measurement

20 MHz Timebase,
100 kHz Timebase,
or PXI_CLK10

Other Internal Source

No

All Except Position
Measurement

Any Other Signal
(such as PFI or RTSI)

External Source

Source

Synchronize

Count