Measurement-computing LogBook Series Manuel d'utilisateur télécharger pdf (Page 143)

Software Reference 989592 LogView LV-17

Setting DBK Parameters in the Analog Input Channel Configuration Window

When configuring DBKs, the LogBook Hardware Configuration Window provides a means of setting up

all manual hardware settings. Once configured, the analog and digital channel setup spreadsheets provide

a means of setting up channel-specific, programmable features.

Some DBKs have hardware settings that must be manually set inside the DBK, such as

jumpers or DIP switches. In these cases the parameter setting in LogView must match

the actual hardware. Setting one does not automatically set the other; in other words,

you must make configuration settings in both software and hardware, when applicable.

For specific DBK hardware configuration refer to the appropriate section of the

DBK Option Cards & Modules User’s Manuals (p/n 457-0905).

Using Multiple Timebases

LogBook is capable of storing channels at 4 independent timebases (one base rate and 3 rates that are

divisions of the base rate). Two reasons for using multiple timebases are: first, to reduce the amount of

storage required by saving slow channels at a slow rate—acquisition can last longer before filling up the

PC-Card; and second, to provide noise reduction by averaging and thus enhance the value of the data.

1. Open the Acquisition Configuration window (see page LV- 42) by clicking the

<Acq> (Acquisition Configuration) button.

2. In the scan rate frame at the right of the window, set the Base Rate A to the

maximum frequency required for any channel.

Acquisition Configuration Window

3. Check all three rate checkboxes B, C, D. Type in a divider for rates B through D to create sub-rate

sampling frequencies which are based on Base Rate A. LogView will compute and display the

corresponding rates in frequency or period units.

Note: The higher the divider (right most column) the slower the scan rate.

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Measurement-computing LogBook Series Manuel d'utilisateur Page 143