National Instruments SCXI-1121 Calibration Procedure page 13

© National Instruments Corporation
6. Set the DMM to voltage mode, and connect it to the output of the same
channel to which the calibrator was connected in step 5. Refer to
Figure 4 to determine the pins on the 50-pin rear connector that
correspond to the positive and negative outputs for the specified
channel. For example, the positive output for channel 0 is pin 3, which
is labeled MCH0+. The negative output for channel 0 is pin 4, which
is labeled MCH0–.
SERDATIN
SLOT0SEL*
Figure 4. SCXI-1121 Rear Connector Pin Assignments
7. Set the calibrator voltage to the value specified by the Test Point entry
listed in Table 12.
8. Read the resulting output voltage on the DMM. If the output voltage
result falls between the Upper Limit and the Lower Limit values, the
module passed the test.
9. Repeat steps 5 through 8 for the remaining test points.
10. Repeat steps 5 through 9 for the remaining analog input channels.
AOGND 1 2
AOGND
3 4 MCH0–
MCH0+
5 6
MCH1+ MCH1–
7 8 MCH2–
MCH2+
9 10 MCH3–
MCH3+
11 12
MCH4+ MCH4–
13 14
15 16
17 18
19 20
OUTREF
21 22
23 24
DIG GND
25 26 SERDATOUT
27 28
DAQD*/A
29 30
31 32
33 34
DIG GND
35 36
SCANCLK
37 38
SERCLK
39 40
41 42
43 44
RSVD
45 46
47 48
49 50
13 SCXI-1121 Calibration Procedure