ASTRO-MED Dash 16u Panduan Memulai Cepat - Halaman 12

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II. Data Capture

DISCUSSION

ACTION

Enter data capture setup

Format memory

Select capture of all channels

Set sample rate to 200 kHz

Set record size to 1 Ms

Set trigger window to 20%

Set capture for one record

Be sure auto triggering is OFF

Enter trigger setup

Enable waveform triggering

Set up the logic for triggering

Pick waveform(s) for triggering

Set up the level for triggering

Run the chart

Arm for capture

Set up one data capture for 0.582 seconds. The capture should be triggered when

the sine wave is applied. The data capture should be a total of 0.582 seconds .

Of the total capture time, 0.116 seconds of the capture should show what the

signal looked like before the sine wave was applied.

HOW TO

[SYS] [SETUP DATA CAPTURE]

[ADVANCED] [FORMAT CAPTURE MEMORY] Use encoder wheel to

select 4 records x 1024 Ks maximum. [BEGIN] [BEGIN] [EXIT] [EXIT]

[SET CHANNELS TO STORE] [DEFAULT]

[EVENT CHANNELS] Toggle to SAVED to include event markers with the

capture. [EXIT]

[SET SAMPLE RATE] The number of samples per second. In general, select

at least ten times the frequency of your signal or the frequency of any changes in

signal. Turn encoder wheel until sample rate is 200 kHz.

[SET RECORD SIZE] The Dash 16u will give you the amount of time that data

will be captured based on the record size and the sample rate. This is shown

under the duration field. Turn encoder wheel until record size is 1 Ms.

[SET TRIGGER WINDOW] Placing the trigger at any point other than the

start of the capture window will allow for pre-trigger data to be captured. Turn

encoder wheel until trigger window is 20%.

[SET OPERATION] You can capture one record or re-arm for more captures.

Turn encoder wheel to single capture.

[ADVANCED] [AUTO TRIGGER] If auto triggering is ON, toggle to OFF.

If toggled ON, auto-triggering is designed to immediately capture data once the

Dash 16u is armed.

[SYS] [SETUP TRIGGER]

[WAVEFORM] Waveform should be toggled to ON position.

[TOGGLE LOGIC] Insure that OR logic is chosen.

Turn encoder wheel so that only Channel #1 is selected.

[SETUP WAVEFORM] [SET CHANNEL] Turn encoder wheel to select

Channel #1.

[SET TYPE / CLASS] Use wheel to select window - outside for type of

trigger.[<<FIELD>>] Turn encoder wheel to set the High level to be 65%.

[<<FIELD>>] Turn encoder wheel to set the Low level to be 35%.

[RUN / HALT]

[ARM] This key is located near the encoder wheel. The Dash 16u is now

recording pre-trigger data, waiting for the trigger.