Omega OMB-DAQBOARD-3000 Series, Руководство пользователя

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Note : Specifications are subject to change without notice.
988093
Specifications 7-3
External Acquisition Scan Clock Input
Maximum rate : 1.0 MHz
Clock Signal Range : Logical zero 0V to 0.8V; Logical one 2.4V to 5.0V; protected to ±15V
Minimum pulse width : 50 ns high, 50 ns low
Triggering
Trigger Sources : 6, 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, 4, 5, or 6 described
below.
1. Single-Channel Analog Hardware Trigger : Any analog input channel can be software programmed as
the analog trigger channel, including any of the analog expansion channels.
Input Signal Range : -10 to +10V max
Trigger Level : Programmable; 12-bit resolution
Hysteresis : Programmable; 12-bit resolution
Latency : 350 ns typical, 1.3 µs max
Accuracy : ±0.5% of reading, ±2 mV offset
Noise : 2 mV RMS
2. Single-Channel Analog Software Trigger : Any analog input channel, including any of the analog
expansion channels, can be selected as the software trigger channel. If the trigger channel involves a
calculation, such as temperature, then the driver automatically compensates for the delay required to
obtain the reading, resulting in a maximum latency of one scan period.
Input Signal Range : Anywhere within the range of the selected trigger channel
Trigger Level : Programmable; 16-bit resolution, including “window triggering”
Latency : One scan period max
3. Single-Channel Digital Trigger : A separate digital input is provided for digital triggering.
Input Signal Range : -15V to +15V
Trigger Level : TTL
Minimum Pulse Width : 50 ns high; 50 ns low
Latency : 100 ns typical, 1.1 µs max
4. Digital Pattern Triggering : 8 or 16-bit pattern triggering on any of the digital input ports. Programmable
for trigger on equal, above, below, or within/outside of a window. Individual bits can be masked for
“don’t care” condition.
Latency : One scan period max
5. 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 max
6. Software Triggering : Trigger can be initiated under program control.