National Instruments NI PXI-5422 Benutzerhandbuch

This test verifies the frequency accuracy of the oscillator on the 
NI PXI-5422. The verification involves generating a 10 MHz sine wave 
with the NI PXI-5422 and measuring the sine wave frequency with one of 
the instruments from Table 2.

To verify the frequency accuracy of the oscillator on the NI PXI-5422, 
complete the following steps:

1.

Connect the NI PXI-5422 CH 0 front panel connector to the instrument 
measuring the frequency accuracy with a male BNC to female SMB 
cable.

2.

Call 

niFgen_init

 (niFgen Initialize VI) using the following 

parameters:

•

resourceName: The name of the device that you want to verify. 
You can find this name under Devices and Interfaces in MAX.

•

IDQuery: 

VI_TRUE

•

resetDevice: 

VI_TRUE

•

vi: A pointer to a ViSession. The variable passed by reference 
through this parameter receives the value that identifies the 
session created by this function. This value acts as the session 
handle and is passed as the first parameter to all subsequent 
NI-FGEN functions.

3.

Call 

niFgen_SetAttributeViReal64

 to set the sample rate 

(niFgen property node: Arbitrary Waveform Output»Sample Rate) 
using the following parameters:

•

vi: The session handle returned from 

niFgen_init

•

channelName: 

"0"

•

attributeID: 

NIFGEN_ATTR_ARB_SAMPLE_RATE

•

value: 

200000000

4.

Call 

niFgen_SetAttributeViReal64

 to set the gain (niFgen 

property node: Arbitrary Waveform Output»Arbitrary Waveform 
Gain) using the following parameters:

•

vi: The session handle returned from 

niFgen_init

•

channelName: 

"0"

•

attributeID: 

NIFGEN_ATTR_ARB_GAIN

•

value: 

1

 

You can adjust this value based on which measuring device you use.