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NI 5421 Specifications 20 ni.com
PFI 0 and PFI 1
(Programmable Function Interface, Front Panel Connectors)
Table 6.
Specification Value Comments
Connectors Two SMB (jack) —
Direction Bi-directional —
Frequency
Range
DC to 105 MHz —
As an Input (Trigger)
Destinations Start Trigger —
Maximum
Input Overload
–2 V to +7 V —
V
IH
2.0 V
V
IL
0.8 V
Input
Impedance
1 kΩ
As an Output (Event)
Sources 1. Sample Clock divided by integer K (1 ≤ K ≤ 4,194,304)
2. Sample Clock Timebase (100 MHz) divided by integer
M (2 ≤ M ≤ 4,194,304)
3. PLL Reference Clock
4. Marker
5. Exported Start Trigger (Out Start Trigger)
—
Output
Impedance
50 Ω —
Maximum
Output
Overload
–2 V to +7 V —