3. Trigger Coupling:
To decide to pass which kind of components through the trigger circuits. The types
include: DC, AC and Hf Reject.
■
DC:
passes through all components of the signal
■
AC:
blocks DC component and attenuate signals at
＜
10Hz
■
HF Reject:
attenuates high frequency component at
＞
80kHz
4.
Pretrigger/Delay Trigger:
Capture data before /after the trigger event.The trigger is usually located at
the horizontal center point on the screen, for example, you can observe 6div pretriger and delay
information, adjusting the waveform horizontally can let you view on more pretrigger information.
Pretrigger can indicate what the waveform is like before the trigger event. So this function can make it
easy, for instance, to find out the cause of glitches in start moment of circuits through observing and
analyzing pretrigger data.
6.5 Setting Acquisition Mode
Press ACQUIRE button to access acquisition mode, see the following table:
Table 6-8
Menu
Settings
Description
Mode
Normal
Peak Detect
AVG
Set to normal sampling
Set to Peak Detect mode,
Set to AVG sampling mode
AVG Number
(only displayed
under AVG mode)
2~256
To set AVG times, stepping in multiples of two,
that is from 2, 4, 8, 16, 32, 64, 128, 256 to 512,
turn Left and Right arrow buttons to change
average times in displayed menu.
Note:
1. Use normal mode when you observe single-shot signal.
2. Please select Peak mode if you want to observe signal envelope and also to avoid any mix-up
3. Use AVG mode if random noise in the signal is required to lower down. The Oscilloscope steps in
multiples of two, please select from 2
～
512 in AVG times
4. Model UTD1000DL can be able to offer fast acquisition function.
Term Explanation
Normal Mode:
The Oscilloscope samples the signals at equal time interval to create the waveform on the
display.
Peak Detect:
Under this mode, the Oscilloscope uses Max. and Min. values detected in each sampling
interval to form waveform on the display. It is suitable to capture and display narrow pulse which may
probably be neglected if using Normal mode. However the noise under Peak Detect sounds louder.
AVG Mode:
The Oscilloscope captures certain numbers of waveforms and calculates their average values
that will be used to form waveforms on the display. This mode can reduce random noise.
Fast Acquisition:
it only acquires points for Min. memory depth required for display, which can shorten the
hold-off time between each acquisition and realize superb capture rate. It can significantly increase the
possibility to find out rarely seen issue.
6.6 Setting the Display
Press DISPLAY button to access display menu, please refer to the follow table:
，
UTD1000L User Manual
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