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Pga filter, Triggering, Pulse trigger – Measurement Computing WaveBook rev.3.0 User Manual

Page 166: External clock, Sequencer

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A-4 Accessories, Specifications, & Abbreviations,

6-25-99

WaveBook User’s Manual

PGA Filter

Filter Type: 20KHz low pass, Butterworth, 5-pole filter

Triggering

Channel 1 Analog Trigger

Input Signal Range: -10 to +10V
Input Characteristics and Protection: Same as channel inputs
Latency:
300ns

Multi-Channel Analog Trigger (up to 72 channels):

Range: Selectable per channel to input range
Latency: 2us/channel, plus 4us maximum

TTL Trigger:

Input Signal Range: 0-5V
Input Characteristics: TTL-compatible with 10K ohm pull-up resistor
Input Protection: Zener clamped –0.7 to +5V
Latency: 300ns

Software Trigger

Latency: 100us typical

Pulse Trigger

Input Signal Range: 0-5V
Input Characteristics: 75 ohms
Input Protection:

±10V maximum

Minimum Pulse Width: 100ns
Latency: 300ns

External Clock

Connector: Available on DB25 digital input
Input Signal Range: 5V TTL compatible
Input Characteristics: 50K ohms pull up (to +5V) in parallel with 50pF
Input Protection: Zener clamped –0.7 to +5V
Delay: 200ns
Signal Slew Rate Requirement:
20V/us minimum
Rate: Up to 1MHz
Divisor ratio: Divide by 1 through 255, selectable
Clock Counter Accuracy: <0.5% error
Clock Counter Range: 1Hz to 100KHz

Sequencer

Operation:

Programmable for channel, gain, and for unipolar/bipolar range in random order

Depth: 128 location
Channel-to-Channel Rate: 1us/channel, fixed
Maximum Repeat Rate: 1MHz
Minimum Repeat Rate: 1MHz
Expansion Channel Sample Rate: Same as on-board channels, 1us/channel