Measurement Computing WaveBook rev.4.0 - Manual (Page 20)

2-10 An Introduction to WaveBook 05-22-01 WaveBook User’s Manual
PGA Filter
Filter Type: 20KHz low pass, Butterworth, 5-pole filter
WBK11A Functions
Input Voltage Ranges: Software programmable prior to a scan sequence
Aperture Uncertainty (SSH): 75ps max
Voltage Droop (SSH): 0.01mV/ms typ
WBK12A/13A Functions
Input Voltage Ranges: Software programmable prior to a scan sequence
Low Pass Filter Type: Software selectable, 8-Pole elliptic or linear phase
Anti-Aliasing Filters: Single-pole pre and post filters, automatically set depending on filter frequency selected
Low-Pass Filter Frequency Cutoff Range: 100KHz, 75KHz, 60KHz…400Hz, bypass (fc=300KHz/N where N=3 to 750
Filter Grouping: 4 Channels each in two programmable banks
Aperture Uncertainty (SSH): 75ps max
Voltage Droop (SSH): 0.01mV/ms typ
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: <0.02% error
Clock Counter Range: 0.01Hz to 100KHz