Measurement-computing WaveBook rev.4.0 Manual do Utilizador descarregar pdf (Página 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

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 81 82

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Measurement-computing WaveBook rev.4.0 Manual do Utilizador Página 20

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