National Instruments NI 5922, Процедура калибровки

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NI 5922 Calibration Procedure 10 ni.com
External Calibration Requirements
Test Equipment
Table 2 lists the equipment required for externally calibrating the NI 5922.
If you do not have the recommended instruments, use these specifications
to select a substitute calibration standard.
Note The delay times indicated in this procedure apply specifically to the Fluke 9500B
calibrator. If you use a different calibrator, you may need to increase these delay times. This
increase varies between calibrator models.
Test Conditions
Follow these guidelines to optimize the connections and the environment
during calibration:
• Always connect the scope calibrator to the input BNC of the digitizer,
or use a short 50
Ω
BNC coaxial cable if necessary. Long cables and
wires act as antennae, picking up extra noise that can affect
measurements.
• Keep relative humidity between 10 and 90% non-condensing.
• Maintain an ambient temperature of 23 ±5 °C.
Table 2. Required Equipment for NI 5922 External Calibration
Required Equipment
Recommended
Equipment
Parameter
Measured Specification
Signal Generator Fluke 9500B
oscilloscope
calibrator
9510 Test Head
(or Wavetek 9500
with high-stability
reference option)
Trigger Sensitivity ±3.5% absolute output
amplitude accuracy for
leveled sine wave up to
1 MHz into 1 M
Ω
Timing 2 ppm frequency accuracy
Flatness 500 ps fall time pulse edge
aberrations:
< ±1.5% peak first 10 ns
< ±0.5% 10 ns to 1
µ
s
< ±0.1% peak beyond 1
µ
s
DC Source Fluke 5700 Vertical Gain DC ±50 ppm into 1 M
Ω
BNC cable — — 50
Ω