National Instruments 5441 用户手册
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19
NI 5441 Specifications
PFI 0 and PFI 1
(Programmable Function Interface, Front Panel Connectors)
Specification
Value
Comments
Connectors
Two SMB (jacks)
—
Direction
Bidirectional
—
Frequency
Range
Range
DC to 105 MHz
—
As an Input (Trigger)
Destinations
Start Trigger
—
Maximum
Input Overload
Input Overload
–2 V to +7 V
—
V
IH
2.0 V
—
V
IL
0.8 V
—
Input
Impedance
Impedance
1 k
Ω
—
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
Impedance
50
Ω
—
Maximum
Output
Overload
Output
Overload
–2 V to +7 V
—
V
OH
Minimum: 2.9 V (open load), 1.4 V (50
Ω load)
Output drivers are
+3.3 V TTL
compatible.
Measured with a
1 m cable.
+3.3 V TTL
compatible.
Measured with a
1 m cable.
V
OL
Maximum: 0.2 V (open load), 0.2 V (50
Ω load)
Rise/Fall Time
≤2.0 ns
Load of 10 pF.