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Appendix A: Specifications
A–26
VX4101A MultiPaq Instrument User Manual
Table A–59: Digital Output Characteristics (Cont.)
Characteristic Description
External Handshake Characteristics Request TTL compatible (with 1 kW pullup), minimum pulse width = 50 nsec, program-
mable active high or low (default). Request input must be in the inactive state prior to
selecting Handshake or the trigger source, update will occur within 5.21 msec of the
Request Leading edge pulse, TTL compatible 1.04 msec nominal pulse width,
programmable high or low pulse, leading edge may be used as a handshake acknowl-
edge, trailing edge as a settled indication.
Segment Repeat Count * 1-4096 or continuous
Segment Repeat Period * 20.83 ms to 16 seconds
* Must be identical for all 32 bits
Digital to Analog Converter (DAC) (Option 1A)
Table A–60: Digital to Analog Converter Characteristics
Characteristic Description
Number Of Channels 8
Vertical Resolution 112 bits (3501 levels)
Output
± 14 V with 8 mV resolution
Accuracy
±(20.0 mV + 0.5% of reading)
Drift
±(1 mV + 0.025% of reading)/month
Protection Short circuit to ground, indefinite.
Do not short to other DAC outputs (channel high output pins are placed non-adjacent to
help prevent this from happening).
Setting Time 33.3 msec to published accuracy
Memory * 1024 samples per channel
Clock External handshake (15 kHz maximum) or internal (3.6662 Hz - 15 kHz)
External Handshake Characteristics Request TTL compatible (with 1 kW pullup), minimum pulse width = 50 ns, program-
mable, active, high or low (default), Request input must be in inactive state prior to
selecting handshake as the trigger source, update will occur within 5.21 msec of the
Request Leading edge.
Strobe, Output pulse, TTL compatible, 2.0 pulse width, programmable high or low
(default) pulse, leading edge may be used as a handshake acknowledge, trailing edge as
a settled indication.