BNC-9920 Operating Instructions and Specifications
10
ni.com
Digital Input/Output
Screw terminals......................................................23 positions, 28–16 AWG wire
LED state indicators...............................................8, 1 each for lines DIO <0..7>
Protection (DC max V), DIO <0..7>
Powered off ....................................................±5.5 V
Powered on.....................................................+10/–5 V
Protection (DC max V), DIO <8..20>
Powered off ....................................................±1.7 V
Powered on.....................................................+6.7/–1.7 V
BNC connector ......................................................1, for DIO 8
Function Generator
Square wave ...........................................................TTL-compatible
Frequency range.............................................100 Hz to 1 MHz
Frequency adjust ............................................Through the Frequency Adjust knob
Rise time ........................................................250 ns
Fall time .........................................................50 ns
Sine/triangle wave
Frequency range.............................................100 Hz to 1 MHz
Frequency adjust ............................................Through the Frequency Adjust knob
Amplitude range ............................................60 mV
p-p
to 4.4 V
p-p
Amplitude adjust............................................Through the Amplitude Adjust knob
Comparison ....................................................Triangle wave is approximately 2 times
the sine wave output 4.4 V
p-p
maximum
Output impedance ..........................................600
Ω
Drive capability
Figure 7.
Typical Maximum Voltages versus Load Impedances
0
1
2
3
4
5
6
Ohms
V
olts
Sine/Triangle Wave (V
p-p
)
Square Wave (V
p-p
)
1 M
10 k
5 k
2 k
1 k
560
