Measurement-computing LogBook Series Instrukcja Użytkownika Pobierz pdf (Strona 168)

LV-42 LogView 989592 Software Reference

Acquisition Configuration

The Acquisition Configuration dialog box allows you to define trigger conditions including various

parameters for pre-trigger, trigger, post-trigger, scan rate and timebase.

LogBook data can be collected in two basic ways depending on the trigger setup:

• Continuous. As a simple data logger in a strip chart mode, all data collected is then saved. The

trigger source can be set to immediate and the post-trigger scan count set to infinite.

• Exception-only. As an exception-capturing system, collected data is saved only under specified

conditions. Pre-trigger, post-trigger, and re-arm parameters allow you to collect only data around

specified events, just the data of interest, nothing more. Thus memory is conserved, and post-analysis

is easier.

The next figure shows a time line with data being collected continuously, but only the trigger block is

logged to memory (the pre-trigger and post-trigger data combined is called a trigger block).

Trigger Parameters Setup

The following figures represent Trigger Setups with and Analog Channel as a trigger source

(channel P1_CH14) and a Calculated Channel as a trigger source (CALC_00).

Other possible trigger sources are:

When Armed, Manual, Digital Channel, GPS Channel (LogBook/360 only), and Absolute Time.

Trigger Setup Using an Analog Channel Trigger Setup Using a Calculated Channel

The manual trigger can be implemented in the following ways:

• With a PC attached, you can trigger LogBook from LogView’s LogBook Monitor window in the

Device menu.

• Without a PC, you can use the Remote LogBook Terminal (LBK1) <Manual Trigger> button.

The auto re-arm feature allows for a large number of acquisitions to take place automatically, with each

acquisition using the same settings. As soon as the previous trigger block is terminated, the system

immediately re-arms itself, waiting for the trigger condition to be satisfied. The Number of Re-arms field

allows you to specify how many triggered acquisitions to capture. For exception-capturing, specify the

number of trigger blocks that should be collected before data logging is terminated. For continuous data

logging, specify 1 trigger block.

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Measurement-computing LogBook Series Instrukcja Użytkownika Strona 168