National Instruments 5441 用户手册

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© National Instruments Corporation
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
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 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
50 
Ω
Maximum 
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.
V
OL
Maximum: 0.2 V (open load), 0.2 V (50 
Ω load)
Rise/Fall Time
≤2.0 ns
Load of 10 pF.