NI 5622 Calibration Procedure
46
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14. End the session using the niScope Close VI.
You have finished verifying the average noise density for the NI 5622.
Adjustment
An adjustment is required only once a year. Following the adjustment
procedure automatically updates the calibration date and temperature in the
digitizer EEPROM.
Complete the following steps to externally adjust the NI 5622.
1.
Make the following connections:
a.
Connect the signal generator to the source input port of the power
splitter.
b.
Connect the power meter to output port 1 of the power splitter.
c.
Connect channel 0 (IF IN) of the digitizer to output port 2 of the
power splitter.
LabVIEW VI
C/C++ Function Call
Call
niScope_close
with the following
parameter:
vi
: The instrument handle from
niScope_init
Table 8.
NI 5622 Average noise Density Published Specifications
Iteration
Range (Vpp)
Bandpass Filter
Published Specifications
(dBm/Hz)
1
0.7
NISCOPE_VAL_FALSE
–146
2
1
NISCOPE_VAL_FALSE
–143
3
1.4
NISCOPE_VAL_FALSE
–140
4
0.7
NISCOPE_VAL_TRUE
–146
5
1
NISCOPE_VAL_TRUE
–143
6
1.4
NISCOPE_VAL_TRUE
–140
