Xycom XVME-500, Руководство пользователя

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XVME-500/590 Manual
February, 1988
2.6.4.5 External Trigger Selection (J 17)
Jumper J17 is installed for external trigger usage.
When installed, pin-49 (of
connector JK1) becomes logic ground reference. If J17 is used for an external
trigger option, J21D should not be used.
When J17 is removed, pin-49 uses J21 as
common analog ground for pseudo-differential (PDI) mode. If both PDI and an
external trigger are desired, do not use J17. Find a logic ground for external
trigger elsewhere on the module.
2.6.5 Input Calibration Grounding Jumpers (523, 524)
These jumpers are used to ground a single input channel in either the SE or DI
mode for purposes of programmable gain offset adjustment (calibration).
If the
inputs are configured for single-ended operation, inserting jumper J23 shorts input
channel 8 to ground. Inserting
J24 shorts channel 0 to ground. In differential mode,
inserting both J23 (channel 0 Hi) and J24 (channel 0 Lo) will short channel 0 to
ground.
Table 2-11 shows the relationship between the jumpers and the grounded channels.
Refer to Chapter 4 (Calibration) for exact input calibration procedure.
Table 2-11. Input Calibration Grounding Jumpers
Jumpers
I
J23 & J24
Input Configuration
Single-ended (SE)
Single-ended (PDI)
Differential
Channel Sorted to Ground
Channel 8
Channel 0
Channel 0
2.7 CONNECTOR PIN ASSIGNMENTS
2.7.1
Connector JKl (XVME-500
Only)
The analog input channels are accessible on the front panel of the module via the
single mass termination header labeled, JKl. Connector JKl is a 50-pin header used
to input analog signals. Its pin-out is compatible with the Analog Devices 3B series
Universal Signal Conditioning System. Table 2-12 defines JKl’s pin-out.
2-20
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