Chapter 2
Configuration and Installation
© National Instruments Corporation
2-3
SCXI-1100 User Manual
The jumpers are used as follows:
•
Fixed jumpers
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Jumper W6 is reserved; do not remove this jumper.
-
On Revision A and B modules, jumper W9 is unused; do not connect this jumper.
-
On Revision C and later modules, jumper W11 does not exist. On Revision A and B
modules, jumper W11 carries the SLOT0SEL* signal from the rear signal connector,
after buffering, to the SCXIbus INTR* line; leave this jumper in the factory-default
position (position A).
•
User-configurable jumpers
-
Jumper W5 carries the SCXIbus MISO line, after buffering, to the SERDATOUT signal
on the rear signal connector.
-
On Revision C and later modules, jumper W9 connects a pullup resistor to the
SERDATOUT signal on the rear signal connector.
-
Jumper W10 configures the guard, the analog output ground, and enables the
Pseudodifferential Output mode.
-
Jumpers W7 and W8 connect the module output to the front connector.
-
Jumper W1 provides a DC path for the bias current of the PGIA when used with floating
or AC-coupled sources.
-
Jumpers W2 through W4 are used to set the lowpass filter (LPF) or full
bandwidth (FBW).
Further configuration of the board is software controlled and is discussed later in this chapter.
Digital Signal Connections
The SCXI-1100 has two jumpers (three jumpers on Revision A and B modules) dedicated for
communication between the data acquisition board and the SCXIbus backplane/Slot 0. These
jumpers are W5 and W9 (and W11 on Revision A and B modules). In most cases, you do not
need to move these jumpers. See Table 2-1 later in this chapter for the description and
configuration of the jumper settings.
Jumper W5
Position 1 connects, after buffering, the SCXIbus MISO line to the SERDATOUT pin of the rear
signal connector. This is the factory-default setting. In this setting, along with the proper setting
of jumper W9, the data acquisition board can read the Module ID Register of the SCXI-1100.
See the Timing Requirements and Communication Protocol section later in this chapter, and
Chapter 4, Register Descriptions, for information on reading the Module ID Register. See
Appendix E, SCXI-1100 Cabling, for the pin equivalences of the SCXI-1100 rear signal
connector and the data acquisition board I/O connector. This position is marked on the module.