ZEEWEII DSO1511G User manual

ZEEWEII
DSO1511G
User’s Manual
Designed by zeeweii
DSO1511G
HANDHELD OSCILLOSCOPE

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① Current trigger mode: Auto/Normal.
② A thumbnail view of the current window and memory.
③ Trigger edge: rising/falling.
④ Battery remaining power.
⑤ The position of the trigger level.
⑥ The waveform type of the generator. When it is closed, no display.
⑦ Time base, which means the time of a grid in the horizontal direction.
Click the “ns” and “s” buttons to adjust.
⑧ Coupling: DC/AC. Probe attenuation: x1/x10/x100.
⑨ Vertical sensitivity, which means the voltage of a grid in the vertical
direction. Click the “mV” and “V” buttons to adjust.
⑩ Zero voltage arrow. Indicates the position on the screen where the
vertical voltage is zero.

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Button Function
1.Normal function
OK/Auto 1.When the menu is opened, it acts as the "OK" function.
2.When the menu is not open, it acts as an "automatic"
function.
Run/Stop 1.Short press once to stop sampling, click again to run.
2.Long press to open the square wave generator window.
Xkey/Power 1. Long press as a power on/off function.
2. Short press as a "multi-function" options.
s Increase “time base”.
ns 1. Reduce “time base”.
2. When the menu is switched to "set", long press this
button to enter the usb connection state.
V Increase “vertical sensitivity”.
mV Reduce “vertical sensitivity”.
Menu Open or close the menu.
↕ ↔ Move waveform or switch menu.
2. Second function(Power + other buttons)
Power+OK
(short press)
Press and hold Power and short press Ok to switch the
trigger edge: rising or falling.
Power+OK
(long press)
Press and hold Power and long press Ok to switch the
trigger mode: auto or normal.
Power+Run Switch trigger level: optional automatic adjustment or
manual adjustment.
Power+s Turn on/off "horizontal cursor"
Power+ns Turn on/off "Vertical Cursor"
Power+V Turn on/off "all measurements"
Power+mV Select probe attenuation: 1X/10X/100X
Power+ Menu Select coupling mode: DC/AC
Power+ ↕ Adjust the trigger level line.
About cursor:
Use the direction buttons to move cursor 1, hold down the Power button and click
the direction buttons to move cursor 2.
About trigger level:
If you want to adjust the trigger level manually, you need to set the trigger level to
"Manual" in the menu (you can also use Power+Run to quickly switch between
manual/auto).

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TABLE OF CONTENTS
1 SAFETY PRECAUTIONS ............................................................. 5
2 PROBES ................................................................................... 6
2.1 PROBE CALIBRATION ............................................................................................................... 6
2.2 PROBE BANDWIDTH ........................................................................................................... 6
2.3 PROBE WITHSTAND VOLTAGE ............................................................................................. 6
2.4 USE TIPS .............................................................................................................................. 7
3 VERTICAL SYSTEM ........................................................... 7
3.1 VERTICAL SENSITIVITY ...................................................................................................... 7
3.2 VERTICAL POSITION ........................................................................................................... 8
4 HORIZONTAL SYSTEM .............................................................. 8
4.1 TIME BASE ............................................................................................................................ 8
4.2 HORIZONTALLY MOVING WAVEFORM .......................................................................................... 8
5 TRIGGER SYSTEM .................................................................... 9
5.1 TRIGGER LEVEL ...................................................................................................................... 9
5.2 TRIGGER POSITION ................................................................................................................. 9
6 OPERATION GUIDE .......................................................... 10
6.1 POWER ............................................................................................................................ 10
6.2 CHARGING.......................................................................................................................... 10
6.3 VERTICAL / TIME BASE SCALE ................................................................................................. 10
6.4 TRIGGER LEVEL .................................................................................................................... 10
6.5 AUTO ................................................................................................................................ 10
6.6 RUN/STOP .......................................................................................................................... 11
6.7 50% ................................................................................................................................. 11
6.8 SINGLE .............................................................................................................................. 11
6.9 REFERENCE WAVEFORM ........................................................................................................ 11
6.10 SCREENSHOT .................................................................................................................. 11
6.11 VIEW IMAGES ................................................................................................................. 11

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6.12 GENERATOR ................................................................................................................... 12
6.13 VIDEO OUTPUT ............................................................................................................... 12
6.14 CONNECT TO PC ............................................................................................................. 12
6.15 CURSOR ........................................................................................................................ 13
7 MENU INTRODUCTION .......................................................... 13
7.1 CHANNEL ........................................................................................................................... 13
7.2 MEASUREMENT ................................................................................................................... 13
7.3 TRIGGER ............................................................................................................................ 14
7.4 DISPLAY ............................................................................................................................. 14
7.5 AUX .................................................................................................................................. 14
7.6 SETTINGS ........................................................................................................................... 15
1 Safety Precautions
Learn about the following safety precautions to avoid injury and prevent damage
to this product or any products connected to it. To avoid possible danger, be sure to
use this product as specified.
 Only authorized personnel should perform maintenance procedures.
 Avoid fire and personal injury。Use the probe correctly and ensure that the
measured voltage does not exceed the maximum withstand voltage.
 Connect the probe correctly.Before measuring voltage greater than 40V, please
switch the probe to the 10X position first.
 Charge the battery correctly.The ideal charging voltage is 5V, and the highest
cannot be higher than 6V.
 Do not operate in a humid environment.
 Keep the surface of the product clean and dry.

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2 Probes
2.1 Probe calibration
The probes delivered with this machine have been compensated and do not need
to be calibrated again. If you use another new probe before the first use, it must be
calibrated before it can be used normally, otherwise the measurement will be
inaccurate (only for the 10X/100X). The calibration method is as follows:
1. Switch the probe to 10X.
2. Connect the probe to a 1KHz square wave with an amplitude of about 3V. Note
that the square wave must be standard without overshoot.
3. Adjust the horizontal and vertical scales of the oscilloscope so that the waveform
is displayed stably at a suitable position on the screen.
4. Use a screwdriver to rotate the adjustable capacitor on the probe until you get the
waveform in the middle of the figure below. The left and right waveforms below
are references for incorrect calibration.
Figure1.1 Probe calibration
2.2 Probe bandwidth
Because the 1X probe has a large input capacitance, the bandwidth of the 1X is
usually within 5MHz; while the bandwidth of the 10X is the standard bandwidth of
the probe.
2.3 Probe withstand voltage
The maximum withstand voltage of the probe is generally marked on the probe,

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which is usually 600V(dc+ac).
2.4 Use tips
2.4.1 Large input capacitance
Because the probe 1X has a large input capacitance (usually more than 100 pf), it
is not suitable for measuring some capacitively sensitive circuits. For example, when
measuring a passive crystal of MCU, the large capacitor may cause the crystal to fail
to vibrate. As for the output of a high-speed op amp, a capacitive load may cause the
op amp to overshoot or oscillate. For circuits with large capacitances that are not
suitable for measurement, please use 10X. The input capacitance of the 10X is usually
several pf.
2.4.2 Measuring high voltage
The oscilloscope's measurement voltage range is -40V ~ + 40V (80Vpp). Please
use the 10X probe to attenuate the signal by 10 times beyond this range. The
measurable voltage range of 10X range is 600V(DC+AC). Please note that you must
first switch the probe to the 10X position before connecting the high voltage signal,
otherwise the high voltage may break down the internal circuit of the oscilloscope。
2.4.3 High bandwidth
Because the 1X probe has a large input capacitance, the bandwidth of the probe
1X is usually within 5MHz, so please use the 10X position when the measured signal
bandwidth is greater than 5M.
Summary: 10X is usually used in most applications.
3 Vertical system
3.1 Vertical sensitivity
Oscilloscope vertical sensitivity refers to the voltage represented by a grid in the
vertical direction of the screen. There are 8 divisions in the vertical direction of the
oscilloscope. You can estimate the amplitude of the signal by observing how many
divisions the waveform occupies on the screen.
The scope's vertical sensitivity range is 10mV / div ~ 10V / div (1X range). In
the oscilloscope button panel, the keys for adjusting the vertical sensitivity are 'mV'
and 'V' button. Pressing the 'mV' button decreases the vertical sensitivity, which is
used to measure signals with smaller voltage amplitude. Press the 'V' button to
increase the vertical sensitivity for measuring signals with larger voltage amplitudes.

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3.2 Vertical position
The method of moving the waveform up and down: directly press the up and
down keys to move the waveform up and down.
In addition: By default, the up and down keys move the waveform. If you need
to move the trigger level, you need to hold down the “Power” key and then click the
up and down keys to move the trigger level.
One-handed operation (not recommended). You can also long press the "mV"
buttons to switch between the "Waveform" or "Trigger Level". Pay attention to the
change of the arrow in the upper left corner, as shown below:
4 Horizontal system
4.1 Time base
The time base refers to the time represented by each grid in the horizontal
direction on the oscilloscope screen. There are 12 grids in the horizontal direction of
the oscilloscope. The sampling time that can be observed on the screen = " time base"
* 12.The user can estimate the signal period by observing how many grids a
waveform period occupies. For example, the current time base is 500us, and one cycle
of the signal occupies 2 grids,so the signal period is 1ms (1KHz).
The oscilloscope time base range is 5ns ~ 10s. The buttons for adjusting the time
base in the oscilloscope button panel are 'ns' and 's' button. When observing
high-frequency signals, you should press the 'ns' button to decrease the time base.
When observing low-frequency signals, you should press the 's' button Increase the
base gear.
What you need to know is that the sampling process of the oscilloscope is:
"Sampling">>"Processing" >> "Display"
When adjusted to a large time base, the screen waveform refresh will be slow
due to the longer time taken by the oscilloscope to sample the waveform. For example,
if the user adjusts to the 50ms time base, that is, the entire sampling time is at least
50msx12 = 600ms, the oscilloscope waveform refresh speed is reduced to less than 2
frames of waveform per second, which is normal.
4.2 Horizontally moving waveform
In the stop mode, the user can move the waveform left and right.

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5 Trigger system
About trigger
The oscilloscope will capture a frame of waveform only after the waveform
meets the pre-set conditions. This action of capturing the waveform according to the
conditions is the trigger.
What does trigger do?
1. Trigger can stabilize the waveform on the screen.
2. Capture the segment of the waveform you want to observe.
The trigger supported by the oscilloscope is edge trigger, including rising edge
trigger and falling edge trigger.
5.1 Trigger level
In edge trigger mode, a trigger condition occurs only when the waveform crosses
the trigger level. To adjust the trigger level:
1. Change "Trigger Level" to "Manual" in the menu.
2. Method 1:
Press and hold the Power key, and then click the up and down direction
buttons to adjust the trigger level.
Method 2:( Not recommended)
In the main window, make sure that the mark in the upper left corner of the
screen is the trigger level arrow(Thin left arrow), as shown in the figure:
If it is not this arrow, long press the “mV” button to switch.
Press the ↑↓buttons to move the trigger level up and down.
5.2 Trigger position
The default trigger position of the oscilloscope is in the middle of the screen. In

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the running state, the user can move the trigger position by pressing the left and right
buttons.。The trigger position is shown on the screen as an arrow.
6 Operation Guide
6.1 POWER
In the shutdown state, long press the "POWER" button to turn on the machine,
and then release the button when the screen is on.
In the power-on state, long press the "POWER" button to shut down(about 4
seconds), and release the button after the screen goes out.
6.2 Charging
The upper right corner of the oscilloscope displays the current remaining
power. When the power is insufficient, use a USB cable to connect a
5V/1A/2A/4A adapter for charging, computer or mobile phone adapter is the best
choice.The charging current is about 700ma.
The LED at the bottom of the charging process is bright red, and the led turns
green when fully charged.
6.3 Vertical / Time base scale
Press the "mV" and "V" buttons to adjust the vertical sensitivity.
Press the "ns" and "s" buttons to adjust the time base.
6.4 Trigger Level
method 1:
Press and hold the Power key, and then click the up and down direction keys to
adjust the trigger level.
Method 2: (not recommended)
Long press the "mV button, when the arrow is a thin leftward arrow, it means
that the ↑↓ button can move the trigger level.
6.5 Auto
The auto function is a more common function in the oscilloscope. After the user
presses the "Auto" button, the oscilloscope will automatically adjust the time base and
vertical sensitivity so that the waveform is displayed in the middle of the screen.
Beginners can try to press the "Auto"button when they don't know how to adjust.