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Input sequencer applicable to daqboard/1000, /1005, Triggering applicable to daqboard/1000, /1005 – Measurement Computing DaqBoard 1000 Series User Manual

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6-2 Specifications – DaqBoard/1000 Series

889094

Note: Specifications subject to change without notice.

A/D Specifications

Applicable to DaqBoard/1000, /1005

Type: Successive approximation, 200 kHz maximum conversion rate

Resolution: 16 bits
Conversion Time: 5 µs

Maximum Sample Rate: 200 kHz
Differential Nonlinearity: ±2 LSB maximum

Integral Nonlinearity: ±1 LSB maximum

Missing Codes: None, over full operating temperature range

Input Sequencer

Applicable to DaqBoard/1000, /1005

Analog, digital and counter inputs can be scanned synchronously based either on an internal

programmable timer, or an external clock source. Analog and digital outputs can be synchronized to

either of these clocks.

Scan Clock Sources: 2

1.

Internal, programmable from 5 µs to 5.96 hours maximum in 1 µs steps

2.

External, TTL level input up to 200 kHz maximum

Programmable parameters per scan: channel (random order), gain

Depth: 512 location
On-board Channel to channel scan rate: 5 or 10 µs per channel, programmable

External Acquisition Scan Clock Input

Applicable to DaqBoard/1000, /1005

Maximum rate: 200 kHz

Clock Signal Range: 0V to +5V

Minimum pulse width: 50 ns high, 50 ns low

Triggering

Applicable to DaqBoard/1000, /1005

Trigger Sources:4, individually selectable for starting and stopping an acquisition. Stop acquisition

can occur on a different channel than start acquisition; stop acquisition can be triggered via modes 2,

3, or 4 described below. Pre-trigger is supported with fixed or variable pre-trigger periods.
1. Single-Channel Digital Trigger: A separate digital input is provided for digital triggering.

Latency:

5 µs max.

2. Digital Pattern Triggering: 8 or 16-bit pattern triggering on any digital input. Programmable for

trigger on equal, above, below, or within or outside of a window. Individual bits can be masked for

“don’t care” condition. Latency: One scan period maximum.

3. Counter/Totalizer Triggering: Counter/totalizer inputs can trigger an acquisition. User can select

to trigger on a frequency or on total counts that are equal, above, below, or within/outside of a

window. Latency: One scan period maximum.

4. Software Triggering: Trigger can be initiated under program control.

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