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