User's Manual

To verify the frequency of the NI 4070/4072, complete the following steps:

1. Remove all connections from the NI 4070/4072.

Note Polarity is not important in steps 2, 3, and 5.

2. Connect one end of the coaxial cable to the Pomona 4892 double

banana plug.

3. Tighten the other end of the coaxial cable in the screw terminal

channels 5 and 39 of the TB-2715 terminal block.

4. Connect the TB-2715 with the coaxial cable attached to the NI 6608.

5. Plug the Pomona 4892 into the HI and LO terminals of the

NI 4070/4072.

6. Call

niDMM_reset to reset the NI 4070/4072 to a known state.

7. Call

niDMM_ConfigureMeasurement with the following

parameters:

• Function =

NIDMM_VAL_FREQ

• Range = 1

• Resolution = 0

8. Call niDMM_ConfigureFrequencyVoltageRange with

Voltage Range set to

9. Call

GPCTR_Control with the following parameters:

• deviceNumber = the device number of the NI 6608, assigned by

Measurement & Automation Explorer (MAX)

• gpctrNum =

ND_COUNTER_0

• action = ND_RESET

10. Call GPCTR_Set_Application with the following parameters:

• deviceNumber = the device number of the NI 6608, assigned

by MAX

• gpctrNum =

ND_COUNTER_0

• application = ND_PULSE_TRAIN_GNR

11. Call GPCTR_Change_Parameter with the following parameters:

• deviceNumber = the device number of the NI 6608, assigned

by MAX

• gpctrNum =

ND_COUNTER_0

• paramID = ND_COUNT_1

• paramValue = 10e6