National Instruments BNC-208 Series, Руководство пользователя

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Chapter 2 BNC-2080 Board
© National Instruments Corporation 2-5 BNC-208X Series User Manual
Table 2-2. DIFF Mode Channel Component Positions
Channel (Position in Figure 2-3)
Differential Single-Channel A B C D E F G
0 (0, 8) R2 R10 R19 R14 R1 R18 C1
1 (1, 9) R4 R11 R21 R15 R3 R20 C2
2 (2, 10) R6 R12 R23 R16 R5 R22 C3
3 (3, 11) R8 R13 R25 R17 R7 R24 C4
4 (4, 12) R28 R35 R45 R39 R27 R44 C9
5 (5, 13) R30 R36 R47 R40 R29 R46 C10
6 (6, 14) R32 R37 R49 R41 R31 R48 C11
7 (7, 15) R34 R38 R51 R42 R33 R50 C12
When the board is shipped, jumpers are inserted in the
E
and
F
positions of the input network, as
in Figure 2-3. These jumpers can be easily removed to build analog input signal conditioning
circuits. Several applications showing the use of these open component positions are discussed in
the section titled
Application Notes
later in this chapter.
Shield Ground
Jumper W2 is used to connect digital ground (DGND) to a grounded metal case. This option is
useful only if the BNC-2080 board is on metal standoffs and is mounted in a grounded metal case.
Shield grounding can be selected to reduce noise.
Figure 2-4 details the jumper settings for W2.
Shield Ground Selected Shield Ground Not Selected
• •
W2
• •
W2
• •
Figure 2-4. W2 Jumper Settings