Agilent Technologies HP 54601B Podręcznik Użytkownika Pobierz pdf (Strona 29)

To create a mask template using Automask

A mask template contains two limit lines: minimum and maximum. The Test

Automation Module provides an easy way to create a mask. Automask allows

you to generate a mask with tolerances from a signal on the screen.

1 Connect a known good signal to the oscilloscope.

2 Set up the oscilloscope with the settings that are required to test the

signal.

3 Press Display , then toggle the Grid softkey to the off position.

4 Press Print/Utility twice.

5 Press the Sequence Admin softkey.

6 Press the Define Automask softkey.

7 Turn the knob closest to the Cursors key to select the mask number.

8 Press the Tolerance softkey, then turn the knob closest to the

Cursors key to set the tolerance.

9 Press the Create Mask softkey to create the mask with the specified

tolerance.

Tolerance operating hint

The tolerance used in Automask is expressed as a percentage of the full-scale

time and voltage of the lowest number of all active channels. It does not

represent the tolerance of the actual size of the input signal. To specify the

tolerance as a percentage of the actual size of the input signal requires some

additional calculations.

For example, a signal of 1 volt peak-to-peak is tested at a vertical sensitivity of

500 mV/div. The full-scale voltage equals the volts/div times the number of

full-scale divisions (500 mV × 8 = 4 V). To specify a 4% tolerance on a 1 V

peak-to-peak signal requires a 40 mV tolerance, but to specify a 40 mV

tolerance on a full-scale voltage of 4 volts requires a 1% tolerance. Therefore,

a 1% tolerance should be specified to generate the mask template.

Operating the Test Automation Module

To create a mask template using Automask

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Agilent Technologies HP 54601B Podręcznik Użytkownika Strona 29