©
National Instruments Corporation
11
NI 5450 Calibration Procedure
Verification
Note
After the 15 minute warm-up period, always self-calibrate the digitizer before
beginning a verification procedure.
This section describes the program you must write to verify the
performance of the NI 5152/5153/5154 to either the calibration test limits
or the published specifications for the device. Refer to
to determine which limits to use in these procedures.
Note
If any of these tests fail immediately after you perform an external adjustment, make
sure that you have met the requirements listed in the
section and
section before you return the digitizer to National Instruments for repair.
Vertical Offset and Vertical Gain Accuracy
Table 3 (NI 5152) and Table 4 (NI 5153/5154) contain the input parameters
for verifying both vertical offset accuracy and vertical gain accuracy.
To verify vertical offset accuracy, complete the procedures described in
the
section for each of the iterations listed
in Table 3 (NI 5152) or Table 4 (NI 5153/5154) for channel 0, then repeat
the procedures for channel 1. The
Calibration Test Limits
and
Published
Specifications
for vertical offset accuracy are shown in Table 5 (NI 5152)
and Table 6 (NI 5153/5154).
To verify vertical gain accuracy, complete the procedures described in
the
section for each of the iterations listed in
Table 3 (NI 5152) and Table 4 (NI 5153/5154) for channel 0, then repeat
the procedures for channel 1. The
Calibration Test Limits
and
Published
Specifications
for vertical gain accuracy are shown in Table 7 (NI 5152)
and Table 8 (NI 5153/5154).
Table 3.
NI 5152 Input Parameters for Vertical Offset Accuracy
and Vertical Gain Accuracy Verification
Iteration
Input
Impedance
Max Input
Frequency
Range
(V
pp
)
1
50
Ω
300 MHz
0.1
2
50
Ω
300 MHz
0.2
3
50
Ω
300 MHz
0.4
4
50
Ω
300 MHz
1
5
50
Ω
300 MHz
2