National Instruments NI 660 Series User Manual page 35

Chapter 3 Signal Connections
Figure 3-4 shows the timing requirements for the CtrnSource signal.
Figure 3-4 shows the minimum pulse width and period that you must use
for the CtrnSource signal. This signal must satisfy both minimum criteria.
If the high phase of the CtrnSource signal is Tsrcpw ns, the low phase must
be Tsrcper - Tsrcpw.
Table 3-4. Minimum Pulse Width and Period for CtrnSource Internal Signals
Minimum
Parameter NI 6601
Tsrcpw (without 5 ns
prescaling)
Tsrcpw (with 3.5 ns
prescaling)
Tsrcper (without 50 ns
prescaling)
Tsrcper (with 16.67 ns
prescaling)
NI 660x User Manual
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Tsrcpw
CtrnSource
Figure 3-4. Timing Requirements for CtrnSource Signal
Minimum with
NI 6602 RTSI Connector
5 ns 5 ns
3.5 ns 3.5 ns
12.5 ns 50 ns
8 ns 16.67 ns
3-10
Tsrcper
Tgatepw
Description
CtrnSource minimum pulse
width (without prescaling)
CtrnSource minimum pulse
width (with prescaling)
CtrnSource minimum period
(without prescaling)
CtrnSource minimum period
(with prescaling)
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