PXIe-5185/5186 Calibration Procedure
|
© National Instruments
|
15
•
Input impedance
: The
Input Impedance
value from Table 5 for the current iteration
•
Max input frequency
:
(PXIe-5185)
3 GHz,
(PXIe-5186)
5 GHz
•
Programmable vertical offset
: The
Programmable Vertical Offset
value from
Table 4 for the current iteration
•
Range
: The
Vertical Range
value from Table 5 for the current iteration
•
Sample rate
: 12.5 GS/s
•
Minimum number of samples
: 1,048,567
3.
Configure the calibrator output impedance to match that of the PXIe-5185/5186 for the
current iteration listed in Table 5.
4.
Configure the calibrator to output the
Test Point
voltage for the current iteration listed in
Table 5.
5.
Enable the calibrator output.
6.
Wait 2.5 s for settling, then record the measured voltage.
7.
Use the following formula to calculate the voltage difference:
error
= V measured -
Test Point
8.
Compare the
error
to the
Test Limit
provided in Table 5.
9.
Repeat steps 2-8 for iterations 2 through 16 listed in Table 5.
10. Connect the calibrator test head directly to the channel 1 50
Ω
input of the PXIe-5185/5186
and repeat steps 2 through 9.
Note
If your module supports 1 M
Ω
input, follow steps 11 and 12. Otherwise, DC
and programmable vertical offset accuracy has been verified. 1 M
Ω
input is available
on PXIe-5185 module part number 152962
x
-0
z
L and PXIe-5186 module part number
152961
x
-0
z
L, where
x
is any letter and
z
is any number.
11. Connect the calibrator test head directly to the channel 0, 1 M
Ω
input of the
PXIe-5185/5186 and repeat steps 2 through 8 for iterations 17 through 44 listed in Table 5.
12. Connect the calibrator test head directly to the channel 1, 1 M
Ω
input of the
PXIe-5185/5186 and repeat steps 2 through 8 for iterations 17 through 44 listed in Table 5.
Table 5.
PXIe-5185/5186 DC and Programmable Vertical Offset Accuracy Limits
Iteration
Input
Impedance
Vertical
Range
(V
pk-pk
)
Programmable
Vertical
Offset (V)
Test
Point (V)
Test Limit
(V)
1
50
Ω
0.11
0
0.045
±0.0020
2
50
Ω
0.11
0
-0.045
±0.0020
3
50
Ω
0.11
0.25
0.295
±0.0100
4
50
Ω
0.11
-0.25
-0.295
±0.0100
