Input Channel Jumpers; Table 2-3. Gain Jumper Allocation; Table 2-4. Gain Jumper Positions - National Instruments SCXI-1121 User Manual

Chapter 2 Configuration and Installation
SCXI-1121 User Manual

Input Channel Jumpers

Gain Jumpers
Each input channel has two gain stages. The first gain stage provides gains
of 1, 10, 50, and 100 and the second stage provides gains of 1, 2, 5, 10, and
20. Tables 2-3 and 2-4 show how to set up the gain for each channel.
Input Channel
Number
0
1
2
3
The board is shipped to you with the first-stage gain set to 100 (position A)
and a second-stage gain set to 10 (position D). To change the gain of your
module, move the appropriate jumper on your module to the position
indicated in Table 2-4. Refer to Figure 2-2 for the jumper locations on your
module.
To determine the overall gain of a given channel use the following formula:
Overall gain = First-stage gain
Gain
First-stage
Second-stage

Table 2-3. Gain Jumper Allocation

First Gain
Jumper
W3
W19
W29
W41

Table 2-4. Gain Jumper Positions

Setting
1
10
50
100
1
2
5
10
20
2-8
Second Gain
Jumper
W4
W20
W30
W42
second-stage gain
Jumper Position
D
C
B
A (factory setting)
A
B
C
D (factory setting)
E
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