Measurement-computing eZ-Analyst rev.14.1 Manual do Utilizador descarregar pdf (Página 42)

4-6 Edit Menu 978791 eZ-Analyst

Maximum Pre-trigger Percentages for 640 and 650 Series Devices

This section consists of 5 tables for users of IOtech 640 or 650 series devices who want to know the maximum pre-trigger

percentage for the configured number of input channels, spectral lines and the analysis frequency. To determine the

percentage:

1) Go to the table for the number of input channels being used.

2) Select the row that matches the number of spectral lines.

3) Look down the column that matches the selected analysis frequency.

4) The result (where row and column intersect) is the maximum pre-trigger percentage.

Example: with 1 channel, 500Hz, and 12800 spectral lines we have a maximum pre-trigger percentage of 47% .

For 1 Channel

Frequency

20Hz

50Hz

100Hz

200Hz

500Hz

1kHz

2kHz

5kHz

10kHz

20kHz

40kHz

Spectral

Lines

25600

12800

6400

3200

1600

800

400

200

100

For 2 Channels