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Appendix A: Specifications
VX4101A MultiPaq Instrument User Manual
A–3
Table A–5: VX4101A-Specific Physical Characteristics
Characteristics Description
Weight 1.8 kg (4 lbs)
Mounting location Installs in an instrument module slot (1-12) of a “C” size VXIbus mainframe
Front panel signal connectors BNC for Counter channels 1 and 2
SMA for Counter channel 3
SMB for Counter external arm
DB-9 (male) for DMM
160-pin connector for Digital to Analog Converter (DAC), Digital Input, Digital Output, and
Relay Drivers
Over Voltage Indication
Bench top DMMs typically display some maximum value and an over-voltage
indication when an over-voltage or over-range condition is measured. These
features are intended to indicate a possible unsafe condition.
For modules (plug in or VXI), a display and an easily noticeable over-voltage
indication light are not feasible and over-voltage becomes the responsibility of
the user. The VX4101 DMM returns a value of 9.9E + 37 or –9.9E + 37 to detect
this situation.
CAUTION. The user should provide some visible indication of a possible unsafe
condition if a value greater that 9.89E + 37 or less than –9.89E + 37 is
returned. Due to rounding errors inherent in floating point storage, it is
recommended that the user not test for explicit equality with the over-range
values.