Page 1
72-2650
72-8705A
72-8710A
72-8225A
72-10510
P/N: 110401105556X REV.0 DATE:2016-02-20
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If you have read through the manual, it is recommended that you keep it safe along with the instrument, or in a
place where it is easily accessible, should you require the information for future usages.
,
,
Page 3
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
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General Safety Overview
The instrument is designed and manufactured under
the safety requirement for GB4793 electric measuring
instrument and IEC61010-1 safety standards. It conforms
to insulation overvoltage standards CATII and safety
standards of pollution level II. The following safety
measures are set out to help avoid any personal injury or
product damage, or damage to any products that connect
with the instrument.
In order to avoid any potential
hazards, please be
sure to use the product as stipulated.
Ensure personnel receive training before using
the product.
Use correct power line: Only the dedicated power
lines for
the product recognized by host country can be
adopted.
Correct plugging and unplugging: Do not plug in
or unplug the unit while probes or testing leads are
connected to a voltage source.
Product grounding: The ground lead of power supply.
In order to avoid electric shock, the ground connection
must not be circumvented. Prior to connecting the
input or output terminal of the product, ensure the
product is grounded correctly.
Correctly connect the oscilloscope probe: The probe
ground lead and the ground are of the same potential.
Do not connect the ground lead with high voltage.
Check the rated values of all terminals: Check all
rated values and marking on the product match local
supply to avoid fire damage or electrical shock; check
the product manual before connecting the product to
view information on the rated values.
Do not open the cover plate of the case during operation:
Do not turn on or operate the product when the external
cover or panel is opened.
Use a proper fuse: Only fuse types and rated indexes
designated for the product.
Avoid circuit exposure: Do not contact exposed contact
or elements after powering on.
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
Page 5
Do not operate the product if it is suspected to
be malfunctioning: Seek qualified maintenance
personnel for inspection.
Ensure proper ventilation.
Do not operate in a humid environment.
Do not operate in an inflammable and explosive
environment.
Keep the surface of the product clean and dry.
Safety terms and symbols
The following terms may be present in the manual:
Warning: warning statements indicate conditions
and actions that may endanger life.
Attention: attention statements indicate conditions
and a c t ions that may cause damages to t h e
product and other properties.
Hazard: Indicates there is direct damage hazard close
to the marking.
Warning: Indicates there is potential damage hazard
close to the marking.
Attention: Indicates there is potential hazard to the
product and other properties.
Symbols on the product: Such symbols may appear
on the product.
High voltage
Please refer to
the manual
Protective
ground terminal
Shall ground
terminal
Measuring
ground terminal
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
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The Manual introduces information related to the operation of digital storage oscilloscopes 72-2650/72-10510/
72-8225A
/72-8705A/72-8710A. The manual comprises the following chapters:
Chapter I Introduction
Chapter II Instrument Setting
Chapter III System Message Example and Troubleshooting
Chapter IV Service and Support
Chapter V Technical Indexes
Appendix A: Technical Specification
Appendix B: Accessories of 72-2650/72-10510/72-8225A /72-8705A/72-8710A
Appendix C: Maintenance and Cleaning Maintenance
Appendix D: Chinese and English Panel Comparison Table
Preface
This user manual covers the following five models of DSO as shown in the table below:
Model
Bandwidth Real-time Sampling Rate
72-2650
72-10510
200MHz
100MHz
50MHz
50MHz
25MHz
1GS/s
1GS/s
1GS/s
250MS/s
500MS/s
72-8710A
72-8705A
72-8225A
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
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72-2650/72-10510/72-8225A /72-8705A/72-8710A
provide the users with simple operation and clear
functions to perform all the basic operations. Scale and
position knobs of each channel provide intuitive,controls
and use. In order to accelerate adjustment and facilitate
measurement, the users can press the AUTO key and
the instrument will then display applicable waveform and
gear position settings.
Apart from easy to use,72-2650/72-10510/72-8225A/
72-8705A/72-8710A DSO also has high performance
indexes and powerful funct ions required fo r fas t er
completion of measurement tasks. Faster signals can
be observed on 250MS/s (72-1050) or 500MS/s (72-10510)
or 1GS/s (72-8705A/72-8710A/72-2650) equivalent
sampling. Powerful trigger and analysis ability make it
easier to capture and analyse waveforms. Clear LCD
and mathematical operation functions make it easier for
users to observe and analyse signal problems in a faster
and clearer way.
From the following parameter features, you can
understand how this series of DSO can satisfy your
measurement requirements.
● Two analog channels.
●
High resolution LCD display
resolution:
72-2650: 320×240
72-1050/72-10510:400×240
72-8705A/72-8710A:800x400
●
Support plug and play USB storage equipment and
be capable of communicating with computer via USB
storage equipment.
● Automatic waveform and state settings.
● Waveform saving and replay feature.
●
Delicate window extension function and precise
analysis on waveform details and overview.
●
Automatic measurement of 28 waveform parameters.
● Automatic cursor tracking measurement function.
●
Unique functions of waveform recording and playback.
● Built-in FFT software function.
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
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●
Multi-waveform mathematical operation function
(including: addition, subtraction, multiplication and
division).
●
Edge, video, pulse width, alternating trigger and other
functions .
● Multi-language menu selection.
●
Simplified Chinese and English help information
display.
Accessories of 72-2650/72-10510/72-8225A/72-8705A/
72-8710A DSO
● Two of probes with 1:1/10:1 X selection.
● One power line.
● One User Manual .
● USB cable.
●
Oscilloscope communication
control software CD.
72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
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Chapter I Introductions ------------------------------------------------------------------------------------------------------------------ 1
1.1 Get to know the User Interface ----------------------------------------------------------------------------------------------------- 1
1.2 General Inspection --------------------------------------------------------------------------------------------------------------------- 5
1.3 Function Inspection -------------------------------------------------------------------------------------------------------------------- 5
1.4 Probe Compensation ------------------------------------------------------------------------------------------------------------------ 7
1.5 Automatic Settings of Waveform Display ----------------------------------------------------------------------------------------- 8
1.6 Introduction to The Vertical System ------------------------------------------------------------------------------------------------ 9
1.7 Introduction to The Horizontal System -------------------------------------------------------------------------------------------- 10
1.8 Introduction to The Trigger System ------------------------------------------------------------------------------------------------ 11
Chapter II Instrument Settings ------------------------------------------------------------------------------------------------------- 12
2.1 Set The Vertical System -------------------------------------------------------------------------------------------------------------- 12
2.2 Set The Horizontal System ---------------------------------------------------------------------------------------------------------- 12
2.3 Set The Trigger System -------------------------------------------------------------------------------------------------------------- 21
2.4 Set the Acquire System -------------------------------------------------------------------------------------------------------------- 24
2.5 Set The Display System ------------------------------------------------------------------------------------------------------------- 31
2.6 Set The Storage and Load System ----------------------------------------------------------------------------------------------- 35
2.7 Set The Utility System --------------------------------------------------------------------------------------------------------------- 41
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2.8 Set The Measurement Parameters ---------------------------------------------------------------------------------------------- 44
2.9 Set The Cursor Measurement ----------------------------------------------------------------------------------------------------- 46
Chapter III System Message Example and Troubleshooting -------------------------------------------------------------- 47
Chapter IV Technical Information --------------------------------------------------------------------------------------------------- 50
Appendix A: Technical Specification ---------------------------------------------------------------------------------------------- 50
Appendix B: Accessories of 72-2650/72-10510/72-8225A /72-8705A/72-8710A DSO ------------------------------ 68
Appendix C: Maintenance and Cleaning Maintenance ---------------------------------------------------------------------- 68
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Chapter I Introductions
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO is desk type DSO. It is designed with conventional
user interface design for intuitive DSO usage for
testing and measurement. This chapter will cover the
followi ng as the beginner guide to the 72-2650/72-10510
/72-8225A /72-8705A/ 72-8710A DSO:
△ 1.1 Get to know the User Interface
△ 1.2 General inspection
△ 1.3 Functional inspection
△ 1.4 Probe compensation
△ 1.5 Automatic settings of waveform display
△ 1.6 Introduction to the vertical system
△ 1.7 Introduction to the horizontal system
△ 1.8 Introduction to the trigger system
1.1 Get to know the User Interface
Gaining familiarity with the different parts of the user
interface of the 72-2650/72-10510/72-8225A /72-8705A/
72-8710A DSO is important for use and the operation
of the DSO. The user interface of 72-2650/72-10510/
72-8225A /72-8705A/72-8710A DSO consist of:
● Vertical control
● Horizontal control
● Trigger control
● LCD display area
● Function buttons (F1, F2, F3, F4, F5)
● User menu area
● Input terminal (CH1, CH2, EXT TRIG)
● Multi-purpose knob
● USB interface
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO are shown on the figure 1-1 and figure 1-2.
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72-2650
200
Figure 1-1: 72-2650 DSO Panel Diagram - 5.7-inch TFT color LCD display
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72-10510
Figure 1-2: 72-10510/72-8225A/72-8705A/72-8710A DSO Panel Diagram -7-inch TFT color LCD display
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DSO User Interface Menu Display (72-10510 pictured)
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1.2 General Inspection
After purchasing a new 72-2650/72-10510/
72-8225A /
72-8705A/72-8710A DSO, we recommend you to inspect
the instrument according to the following steps.
1. Inspect w hether t here is a ny damage cau s ed
by
transit.
In case of damage to the packing box or foamed plastic
packaging materials, contact your point of purchase.
2. Accessories inspection.
For provided accessories details, description has been
made in aforesaid “accessories of 72-2650/72-10510/
72-8225A /72-8705A/72-8710A DSO” item of this user
manual. Please check whether there are any
accessories missing. If any of the items are missing
or damaged please contact your point of purchase.
3. Check the complete instrument.
In case of damages to the appearance of the instrument,
abnormal operation or failure to pass the performance
tests, please contact the Tenma product distributors or
local Tenma offices.
If the instrument is damaged due to transportation, please
pay attention to keeping the package, notify transportation
department and Tenma product distributors and Tenma
will make arrangement for repair or replacement.
Warning: Please ensure that the DSO has been safely
grounded to avoid hazard.
1.3 Function Inspection
Conduct a fast function inspection to verify whether
the instrument is in normal operation. Please take the
following steps:
Power on the instrument
Power on the instrument with a voltage supply of AC
100 to 240VAC and frequency of 45 to 440Hz.
After
powering on, press UTILITY menu and wait for
30min, and then press F1 auto calibration. At the next
menu level, press the F1 button again at the “factory settings”
as shown in Figure 1-4.
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72-10510
Warning: please confirm that the DSO has been safely
grounded to avoid hazard.
DSO accessing to signal
①. 72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO has two input channels with an additional external
trigger input channel. Please check the signal according
to the following steps. Connect DSO probe to CH1 input
terminal and set the attenuation rate switch on the probe
as 10× (Figure 1-5)
Figure 1-5 Setting of Probe Attenuation Rate Switch
②.
It is necessary to set probe attenuation coefficient on DSO.
Attenuation coefficient changes the vertical gear position
rate of the instrument, thus making the measurement result
correctly reflect the amplitude of measured signals. Probe
attenuation coefficients are set in the following ways:
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Press F4 to make the menu display 10×
Figure 1-6 Setting of attenuation coefficient on DSO
③. Connect the probe pin and ground clamp to the
corresponding terminal of the probe compensation signal.
Press AUTO key. Within several seconds, square wave
display (1kHz, about 3V, peak-to-peak value) is as shown
in Figure 1-7. Check CH2 in the same way; press OFF
function key to close CH1; press CH2 function key to
turn on CH2; repeat step 2 and step 3.
Figure 1-7 Probe Compensation Signal
1.4 Probe Compensation
When connecting the probe with any input channel for
the first time, it is required to make the adjustment each,
matching the probe with input channel. Probe use
without compensation will lead to measurement error.
In case of probe compensation, follow the following
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steps:
1. Set the probe menu attenuation coefficient as 10×,
place the switch on the probe at 10× and connect the DSO
probe with CH1. Connect the probe end and signal
output connector to the probe compensator, the ground
clamp and ground lead connector of the probe
compensator,
turn on CH1 and press
AUTO .
2. Observe displayed waveform
Over-
compensation
Correct
compensation
Under-
compensation
Figure 1-8a Probe Compensation and Correction
If the screen displays “under-compensation” or “over-compensation”
for waveform as shown in the above figures, use a screwdriver
with a nonmetal handle to adjust the variable capacitance
on the probe until the screen displays “correct compensation”
for the waveform as shown in the below figure.
Figure1-8b:Correct compensation
Warning: In order to avoid electric shock when
measuring high voltage with the probe, please ensure that
the insulation lead of the probe is in good condition and
do not touch the metal part of the probe when
connected to a high voltage power supply.
1.5 Automatic Settings of Waveform Display
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO has automatic setting function
. According to input
signals, the DSO automatically adjusts the
vertical
deflection factor, scanning time base and trigger
mode
until the most appropriate waveform is displayed.
To apply the automatic setting, the frequency of the measured
signal is required to be ≥ 50Hz and the duty ratio is > 1%.
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Apply automatic setting
1. Connect the measured signal to the signal input channel.
2. Press AUTO key. DSO will automatically set its vertical
deflection factor, scanning time base and trigger mode.
If further careful observation is required, adjustment can
be conducted again after automatic settings until the
waveform display reaches the required optimum effect.
1.6 Introduction to The Vertical System
As shown in the figure below, there are a series of keys
and knobs in the vertical control area. The instructions
below
will guide you with controlling
the vertical system.
72-2650 vertical
control panel (Left)
72-10510/72-8225A
/72-8705A/72-8710 A
vertical control panel
(Right)
Figure 1-9 Vertical Control Area on the Panel
1. Use the vertical position knob to move the vertical
position of the waveform display on the LCD screen. By
default, the waveform should be displayed at the centre of
the screen.
2. should see the waveform move vertically
upward and downward when the knob is rotated.
3. The user can also change the waveform scale by rotating
the Scale Knob on the vertical system. Please notice that
the “V/div” will be changed to indicate the corresponding
vertical scale level.
4. The user can enable/disable the input channel by pressing
the [CH1] and [CH 2] button on the vertical system
(For 72-10510/72-8225A/72-8705A/72-8710A
DSO).
Attention:
To disable the input channel for the 72-2650 DSO,
please press the [OFF] button on the vertical system.
All of the other vertical system settings will be
explained in greater detail in chapter II of this user
manual.
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The user
Page 20
1.7 Introduction to The Horizontal System
As shown in the figure below, there is one key and
two knobs within the horizontal control area. The
instructions
below will guide you with setting the
horizontal
time base.
72-2650 horizontal
control panel (Left)
72-10510/72-8225A/
72-8705A/72-8710A
horizontal control
panel (Right)
Figure 1-10 Horizontal Control Area on the Panel
1. Use the horizontal SCALE knob to change the gear
position
settings of the horizontal time base and observe
the changes
of state information. Turn the horizontal
SCALE knob to change the "s/div" time base gear
position, and you can find
that corresponding changes
have taken place in the time
base gear position display
of the corresponding channel in
the status bar.
Horizontal scanning rate steps up in multiples of
1,2 and t hen 5 , e.g . 1 ms/div- > 2 m s/div-> 5 m s / div-
>10ms/div…. etc.
*N o te: the hor i zontal t i me base ran g e of different
72-2650/72-105 10/72-8225A /72-8705 A/72-8710A
varies between 2ns/div to 50s/div.
Details are listed in
technical specification.
2.
Use the horizontal POSITION knob to adjust the horizontal
position of the signal in the waveform window. The horizontal
POSITION knob controls the trigger position of the input
signal. When applying to trigger position and turning
the horizontal POSITION knob, it is possible to observe
the
horizontal movement of the waveform along with
POSITION knob turning.
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1.8 Introduction to The Trigger System
As shown in Figure 1-11, there is one knob and three
(or two) keys in the trigger menu control area. The instructions
below
will guide you with the setting of the trigger system.
72-2650 trigger
control panel
72-10510/72-8225A/
72-8705A/72-8710A
trigger control panel
Trigger Menu
Display
Figure 1-11 Trigger Menu on the Panel
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All of the other horizontal system settings are explained
in greater detail in chapter II of this user manual.
All of the other trigger system settings are explained in
more detail in chapter II of this user manual.
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Un til n ow, a basic explanation has been given for
controlling 72-2650/72-10510/72-8225A/72-8705A/
72-8710A DSO at the vertical, horizontal, and
trigger
systems. We recommend you to
repeat Chapter
I if you are still not familiar with the basic control of the operations.
In this chapter, you will be learning about different
settings related to the 72-2650/72-10510/72-8225A /
72-8705A/72-8710A DSO:
Chapter II Instrument Settings
2.1 Set The Vertical System
( CH1 , CH2 , MATH , REF , OFF )
2.2 Set The Horizontal System
( MENU or HORI MENU )
2.3 Set The Trigger System
( MENU , TRIG MENU , 50% and FORCE )
2.4 Set The Acquire System ( ACQUIRE )
2.5 Set The Display System ( DISPLAY )
2.6 Set The Storage and Load System ( STORAGE )
2.7 Set The Utility System ( UTILITY )
2.8 Set The Measurement Parameters ( MEASURE )
2.9 Set The Cursor Measurement ( CURSOR )
It is advised that you to read this chapter carefully to
understand multiple measuring functions and system
operation methods of 72-2650/72-10510/72-8225A /
72-8705A/72-8710A DSO.
2.1 Set The Vertical System
Each channel fo r 72-2650/72-10510/72-8225A /
72-8705A/72-8710A DSO can be set independently
through the vertical system menu. After pressing CH1
or CH2 function key, the system shall display the function
menu of CH1 or CH2 channel. See Table 2-1 below
for description.
Function
Menu
Setting Description
Block the DC component of input
signal.
AC
Coupling
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Pass through DC and AC
components of input signal.
Disconnect input signal.
DC
Grounding
Coupling
Bandwidth
Limited
Limit bandwidth to 20MHz to reduce
displayed noise. Full bandwidth.
Turn off bandwidth limited.
On
Off
On
Off
V/div
Rough
adjustment
Fine
adjustment
Set vertical deflection factor by
coarse adjustment based on 1-2-5
scale. Rough adjustment setting
range is further subdivided for fine
adjustments to improve vertical
resolution.
Probe
1×
10×
100×
1000×
Please set the probe compensation
system ratio to match the probe
attenuation coefficient of the probe
to be used.
Inverting
Activate reverse function of
waveform. Waveform will be
displayed reversely.
Waveform is displayed normally.
Setting coupling channel
The following example shows how to
change the coupling
of the input channel. If the measured
signal connected to the
CH1 channel is a sinusoidal signal containing DC component,
press F1 to select
AC coupling, to set the CH1
into AC
coupling mode. The DC component of the measured
signal is blocked.
The
Waveform display is shown in the figure below.
If you press F1 to select DC coupling, setting
both
the DC and AC components of measured signals at
Figure 2-1 Blocked DC Component of Signal
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Page 24
the CH1 channel as shown in the figure below.
Figure 2-2 Simultaneous Display of Signal DC and AC
Components
If you press F1 to select as grounding , to set CH1
to connect to the internal ground of the instrument, both
DC and AC components of the input signal are blocked.
The waveform display is shown in the figure below.
(Note: although no waveform is displayed on the screen
in this mode, the input signal is still connected with the
channel circuit.)
Figure 2-3 Simultaneous Blocking of Signal DC
and AC Components
Setting channel bandwidth Limited
The following example shows how to change th e
bandwidth limited of the input channel.
Assuming that the input signal is a 40MHz sinusoidal
signal, connect to CH1. If you press F2 to set bandwidth
limited as OFF, there will not be any bandwidth limited to
CH1. You can see all the high-frequency components
in
measured signal as the waveform display is shown in
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the figure below.
Figure 2-4 Waveform Display When Setting
Bandwidth Throttling in OFF Position
If you press F2 again to set the bandwidth limited
as ON, the noises or high-frequency component over
20MHz in measured signal shall be attenuated,
as the waveform display shows in the figure below.
Figure 2-5 Waveform Display When Setting
Bandwidth Throttling as ON
Setting probe Rate
In order to function with the attenuation coefficient
setting of probe, it is required to set the probe attenuation
coefficient in the channel f unct ion menu . If the pr obe
attenuation coefficient is 10:1, the probe coefficient in the
chann e l funct i on men u shall b e set t o 1 0× and
vice-versa.
You can press the F4 function key to select a different
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Page 26
probe coefficient for the input channel as shown in
the figure below.
Figure 2-6 Probe Attenuation Coefficient
Setting in Channel Menu
Vertical V/div adjustment setting
Adjustments of vertical deflection factor V/div gear
po sitio n can be se t to c oarse adjustmen t and fine
adjustment by pressing the F3 function key.
Coarse adjustment, V/div can be adjusted in steps
of 1,2 and 5,
e.g. 10mV/div->20mV/div ->50mV/div…. etc.
Fine adjustments refer to changing the deflection factor
with smaller stepping within the current vertical gear
position range.
Figure 2-7 Coarse and Fine Adjustment of
Vertical Deflection Factors
Settings of waveform inverting
Waveform inverting can be set by the F5 function button.
The measured input signal will display with 180
degrees difference (vertically inverted) if the waveform
inverting is ON. Please see Figure 2-8 for a non-inverted
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Page 27
waveform and Figure 2-9 for an inverted waveform.
Figure 2-8 Vertical Channel Inverted
Settings (Invert: OFF)
Figure 2-9 Vertical Channel Inverted
Settings (Invert: ON)
Mathematical operation function
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO support mathematical operation function for the
input signals. Figure below show the match result for
CH1 + CH2 as an example.
Figure 2-10 Mathematical Operation
After pressing the MATH button at the menu area the
By pre ssing F1 on t he math menu , you can
s elect mathematic operation or FFT operation.
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mathematic operations will be enabled.
Page 28
Table 2-2: Math Menu
Function Menu Se tting s De scrip tion
Type Mathematic operation
Signal
source 1(F2)
Ma th
CH 1
CH 2
You can select signal source
1 as CH1 or CH2
+
–
×
÷
Operator (F3)
Signal source 1 + signal source 2
Signal source 1 - signal source 2
Signal source 1 × signal source 2
Signal source 1 ÷ signal source 2
Signal source 2 (F4)
CH1
CH2
You can select signal source
1 as CH1 or CH2
Function Menu Settings Description
Type FFT
FFT spectral analysis
By pressing the F1 button again in mathematical
operation
mode to enter FFT (fast fourier transform)
operation, the
time domain (YT) signal can be converted
into frequency
domain signal.
At FFT operation, it is convenient to observe signals
of the following types:
● Measure harmonic content and distortion in the system.
● Display noise characteristic in DC power supply.
● Analyse vibration.
Table 2-3: FFT Menu Description
FFT mathematical operation
Signal source (F2)
CH1
CH2
Set to select CH1 or CH2 as
waveform to be transform
Window (F3)
Hanning
Hamming
Blackman
Rectangle
Set t o sele ct Hannin g ,
Hamming , Bl ackm an, or
Rectangle window function
Vertical unit (F4)
Vrms
dBVrms
Set vertical units as Vrms
or dBVrms
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FFT operation skills
Signal with DC component or deflection will lead to
error or deviation of FFT waveform component. AC
coupling mode c an be selected to reduce DC
component. In order to reduce random noise of
repeated or single pulse events and aliasing frequency
components, the acquiring mode of DSO is set to be
average acquiring.
Select FFT window
Assuming that YT waveform is continuously repeated,
DSO shall conduct FFT conversion for time record with
finite length. In this case, when the cycle is an integer,
YT waveforms are of the same amplitude at the starting
and ending positions, without interrupting. However, if
the cycle of YT waveform is not an integer, the waveform
amplitudes shall be different at starting and ending
positions. Therefore, high-frequenc y t rans ient
interruption shall occur at the joints. In frequency domain,
this effect is called leakage. Therefore, in order to avoid
the generation of leakage, by multiplying original waveform
by a window function, the value at forced starting and
ending positions is 0. See the table below for window
function application:
Table 2-4 FFT window function
FFT
Window
Features
The most suitable
measurement content
Rectangle
The best frequency
resolution and the
worst amplitude
resolution. It is
basically similar to
the condition
without window.
Signal levels, before and
after transient state or
short pulse, are basically
equal. Constant amplitude
sinusoid with very similar
frequency possesses
bandwidth random noise
with slow spectrum change.
Compared with rectangular
window, it has better
frequency resolution and
worse amplitude resolution.
Random noise of sine,
cycle and narrow-band.
Hanning
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The frequency resolution
of Hamming window is
slightly superior to
Hanning window.
Signal levels, before and
after transient state or short
pulse, are of large difference.
Hamming
The best amplitude
resolution and the
worst frequency
resolution.
Mainly used for single
frequency signal seeking
for higher subharmonic.
Blackman
Explanation of nouns
FFT resolution: defined as the quotient of sampling
and operation point. When the number of operation
points
are fixed, the lower the sampling rate is, the
better the FFT resolution will be.
Nyquist frequency: for waveform with maximum
frequency of f, at least 2f sampling rate is required to
reconstruct original waveform. It is also called Nyquist
rule, where f refers to Nyquist frequency, while 2f
refers to Nyquist sampling rate.
Load a Reference Waveform
Any of the pre-saved can be loaded by
p
ressing the REF button on the 72-2650 DSO. For
72-10510/72-8225A/72-8705A/72-8710A, pressing the
STORAGE button will load the pre-saved waveform.
Please see the “Storage and Load” section for how to
save a waveform.
After pressing the REF button, the user should be able
to select two of the RefA F1 and RefB F2 on the
function menu to load the pre-saved waveform.
Assume that you select RefA, you will be able to see
the load function menu as below.
Table 2-5 Load function menu
Function
Menu
Settings
Description
Destination (Position of the internal
memory) where the waveform will be
loaded.
There are 20 sets of internal memory
available to storewaveforms
navigated by the multipurpose knob.
1～20Source (@)
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Select to load a pre-saved waveform
from the internal memory of the DSO
Select to load a pre-saved waveform
from the external USB device
(selection can only be available after
inserting USB)
Disk (F2)
DSO
USB
OFF (F3)
Turn off reference waveform
Press to load a pre-saved waveform
Load (F4)
Assuming that the user has already stored a waveform
into DSO internal memory location 3. To load this
waveform back to RefA, the user should do the
following at the Load function menu.
Select the memory location 3 by using the multi-purpose
knob.
Press F4
A loading progress bar will be shown on the screen.
If loading successfully, a white waveform should be
displayed on the screen label with RefA.
If there is no waveform stored at the selected memory
location, you will see a system message showing “no
data
in the position”.
The user can turn off the RefA reference waveform by
pressing the OFF F3 button on the load function menu.
Attention:
Loading the pre-saved waveform into RefB follows
the same procedure as above.
If waveform is stored to the USB device, there should
be 200 available memory locations to be selected. Please
see the “Storage and Load” sec tion for how to save a
waveform to the USB device.
2.2 Set The Horizontal System
Horizontal control knob
Using the horizontal control knob can change the
horizontal scale (time base) and trigger horizontal
position (trigger position) in internal storage. The vertical
midpoint in screen horizontal direction is the time reference
point of waveform. Changing of the horizontal scale can lead
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Function Menu Settings Description
to expansion or contraction of the waveforms relative to the
screen
centre. When the horizontal position changes, the
position
relative to waveform trigger point will be changed.
The horizontal system can be controlled by the
following panel of buttons/knobs.
72-2650 horizontal
control panel (Left)
72-10510/72-8225A/
72-8705A/72-8710A
horizontal control
panel (Right)
Figure 2-11 Horizontal System Interface
The horizontal position control knob is used to adjust
the horizontal position of channel waveform (including
mathematical operation). The resolution of the horizontal
position control knob varies at different time bases.
The horizontal scale control knob is used to change
the time base of the channel waveform, by shown as s/div.
If the extension time base is turned on, the window
width will be changed due to the delay in the scanning
time base through turning the horizontal scale knob.
Horizontal menu button: the user can press to enter
the
horizontal menu function. (See table below)
Table 2-6 HORI MENU / MENU
Main time base (F1)
Press to turn on the main
time base
Window extension (F3)
Press to turn on the
extension time base
Trigger hold-off (@)
To adjust the trigger hold-off
time by multi-purpose knob
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The Window extension time base function is used to
observe the waveform detail for a given window of the
waveform. The user can enable this function by pressing
the F3 button at the horizontal function menu.
Figure 2-12 Screen Display under Window Extension
Under Window extension time base, there are two
display areas, as shown in the figure above. The original
waveform is displayed in the upper part, this area can be
moved left and right by turning the horizontal POSITION
knob or can be enlarged and reduced by turning the
horizontal
SCALE knob.
The waveform generated through horizontal extension
time base of the selected original waveform area shall be
displayed in the lower part. As the waveform displayed
in the whole lower part corresponds to the selected area
in the upper part, the extension time base can be enhanced
by turning the horizontal SCALE knob to reduce the
selected
area of the waveform.
Trigger hold-off time adjustment
Trigger hold-off time is the time interval between two
trigger events (100ns by default).
Trigger hold-off time can be adjusted by using the
multi-purpose knob at the horizontal function menu.
During trigger hold-off, DSO will not be triggered by any
new events until the hold-off time is over. For example, if
a set of pulse train shall be triggered from the first pulse
upon request, then the hold-off time can be set as the
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pulse train width. As shown in Figure 2-13.
Figure 2-13 Trigger Hold-off for Synchronization
of Complex Waveform
The trigger setting of a DSO decides when the data
of the waveform starts to be collected and displays on
the screen. Once the trigger is correctly set, it can convert
unstable display into meaningful waveform display. Data
acquisition of a DSO starting trigger conditions satisfied.
After a signal trigger is detected, DSO will continuously
collect data and display the waveform on the right of the
trigger point. The trigger control area of the DSO operation
panel includes: trigger level adjustment knob; trigger
menu key: TRIG M ENU fo r 72-10510/72-8225A /
72-8705A/72-8710A and [MENU] for 72-2650. For the
72-10510/72-8225A/72-8705A/72-8710A DSO, it can
set the trigger level to be at 50% of signal vertical midpoint
by the 50% button. For the 72-10510/72-8225A DSO, it
is achieved by pressing SET TO ZERO key. Forcing
trigger shall be achieved by pressing FORCE button.
FORCE trigger is a trigger signal generated by
force
and is mainly applied in trigger mode and “normal” and
“single” mode.
2.3 Set The Trigger System
Trigger level knob: trigger knob is used to adjust the
t
rigger level (t o set the voltage level corresponding to
trigger point).
Trigger Type
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO support: edge, pulse width, video trigger and alternative trigger;
Edge Trigger: Edge trigger mode refers to the triggering
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of the trigger threshold on the input signal edge.
Pulse Width trigger: trigger produces when the pulse
width of the trigger signal satisfies some set trigger >, <
or = condition.
Video Trigger:
conduct field or line trigger for standard
video signal. The triggering can be enabled by pressing
the [F1] button at the [TRIG MENU] for the 72-10510/
72-8225A/72-8705A/72-8710A DSO, by pressing [F1]
button at the [MENU] for the 72-2650 DSO;
Alternating trigger: applicable to trigger signals without
frequency correlation.
All kinds of trigger menus shall be respectively
described as follows.
The user can enable the alternating trigger by pressing [F2]
button at the [TRIG MENU] for the 72-10510 /72-8225A/
72-8705A/72-8710A DSO, or by pressing [F2] button at
the [MENU] for the 72-2650 DSO.
Edge trigger
Edge trigger mode refers to the triggering of trigger
threshold on the input signal edge. When selecting “edge
trigger”, trigger on the rising edge or falling edge of input
signal shall be completed.
Function Menu Settings Description
Type
Table 2-7
Edge
CH1
CH2
Set CH1 as the triggering
signal source
Set CH2 as the triggering
signal source
Set external trigger input
channel as the triggering
signal source
EXT
Set external trigger source
(divided by 5) as trigger level
range (Only for 72-2650)
EXT/5
Set AC power line as
trigger source
AC Line
Set to Alternative trigger
between CH1 and CH2 as
signal source
Alter
Source (F2)
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Function Menu Settings Description
Reject high-frequency
components of the triggering
signal (over 80kHz signals)
High-frequen
cy
rejection
Reject low-frequency
components of the triggering
signal (below 80kHz signals)
Trigger coupling (F5)
Low-frequency
rejection
Set trigger on the signal
rising edge
Set trigger on the signal
falling edge
Set trigger on the signal both
rising and falling edge
Rising
Falling
Rise/fall
Slope (F3)
Set to automatic trigger. The
DSO will continuously
perform data acquisition
without triggering signal.
Set to normal trigger. The
DSO will only perform data
acquisition when there is a
triggering signal.
Set to single trigger. The
DSO will only perform 1
cycle of the data acquisition
when there is a triggering
signal.
Mode (F4)
Automation
Normal
Single
Block the DC component of
the triggering signal
Pass through DC and AC
components of the triggering signal
DC
AC
Trigger
coupling (F5)
Pulse width trigger
For pulse width trigger, the trigger time shall be subject
to the pulse width of the triggering signal. You can capture
abnormal pulse by setting pulse width conditions.
Table 2-8
Type
Pulse width
Set CH1 as the triggering
signal source
Set CH2 as the triggering
signal source
Set external trigger input
channel as the triggering
signal source
Source (F2)
EXT
CH2
CH1
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Source (F2)
Set external trigger source
(divided by 5) as trigger level
range (Only for 72-2650)
EXT/5
Set AC power line as trigger
source
AC Line
Set to Alternative trigger
between CH1 and CH2 as
signal source
Alter
Trigger when pulse width is
greater than pulse width
setting values
>
>
Trigger when pulse width is
less than pulse width
setting values
Trigger when pulse width is
equal to pulse width
setting values
=
Pulse width
conditions (F3)
Set the pulse width to
between 20ns~10s by using
the multi-purpose knob on
the front panel
Pulse width
setting (@)
Go to next page
Next page 1/2
Type
Pulse width
Set the positive pulse width
as trigger signal.
Set the negative pulse width
as trigger signal.
Set the positive pulse width
as trigger signal
Set the negative pulse width
as trigger signal
Positive
Negative
Trigger polarity (F2)
Set to automatic trigger.
The DSO will continuously
perform data acquisition
without a triggering signal.
Set to normal trigger. The
DSO will only perform data
acquisition when there is a
triggering signal.
Normal
Automation
Set to single trigger. The
DSO will only perform 1
cycle of the data acquisition
when there is a triggering
signal.
Single
Mode（F3）
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Function Menu Settings Description
Type Video
Block the DC component of
the triggering signal
Pass through DC and AC
components of triggering
signal
Reject high-frequency
component of the triggering
signal (over 80kHz signals)
Reject low-frequency
component of the triggering
signal (below 80kHz signals)
Lowfrequency
rejection
Highfrequency
rejection
AC
DC
Trigger
coupling (F4)
Go to previous page
Previous
page 2/2
Video trigger
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO support video trigger compactable to NTSC or
PAL standard video signals.
Trigger coupling will
automatically preset to DC coupling if the video trigger is
active. Video trigger menus are shown in the table below:
Table 2-9 Video Trigger S e t ting
Set CH1 as the triggering
signal source
Set CH2 as the triggering
signal source
Set external trigger input
channel as the triggering
signal source
Set external trigger source
(divided by 5) as trigger level
range (Only for 72-2650)
Set AC power line as trigger
source
AC Line
EXT/5
EXT
CH2
CH1
Source (F2)
Select to PAL video standard
Select to NTSC video standard
PAL
NTSC
Standards (F3)
Set trigger synchronize to
video line
Set trigger to synchronize in
designated video line
number. Adjust video line
number by using the
multipurpose knob in the
upper part of front panel.
All lines
Designated
line
Synchronization (F4)
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Figure 2-14 is an example screen display when PAL
video trigge r model is s e l e cted a s s t andard an d
synchronization mode is All Line Synchronization.
Figure 2-14 Video Trigger: Line Synchronization
Figure 2-15 is an example screen display when PAL
video trigge r model is sel e c ted as s t andar d and
synchronization mode is set to field synchronization.
Figure 2-15 Video Trigger: Field Synchronization
Alternating trigger
During alternating trigger, the trigger signal comes
from two input channels, CH1 and CH2 alternatingly.
Alternating trigger is useful for observing two signals with
different frequency. See the figure below for display of
triggered alternating waveform example and Table 2-10
for triggered alternating menu setting:
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Figure 2-16 Observing Signals with Two
Different Frequencies by Alternating
Trigger Mode
Table 2-10 Alternating Trigger Mode Setting
Function Menu
Settings Description
Type
Edge
Edge-triggered mode is set
Trigger source Alternating
CH1 and CH2 alternating trigger
Rising edge is set for trigger slope
Ascending Slope
Auto-triggered mode is set
Automation
Trigger mode
Trigger coupling AC
AC trigger coupling mode is set
Force trigger
Force trigger can be understood as forcing the DSO to
refresh the data acquisition process, so the user can
observe the
waveform being captured. To enable the force
trigger,
press the FORCE button. One of the very
useful
applications for force trigger is at the “normal” and
“single”
triggering mode. When the triggering signal
does not present, DSO will stop data acquisition. You can
press
the force trigger to re-enable the data acquisition of
the
DSO to see the current input signal.
Explanation of nouns
1
. Trigger source: trigger can be achieved from several
signal sources: input channels (CH1 and CH2), external
triggers (EXT and EXT/5) and AC line.
■External trigger (EXT TRIG): meaning to set the
triggering source base on given external connection to
the “EXT TRIG” input channel. This can be a significant
applic a t ion for 72-2650/72-10510/72-8225A /72-8705A/
72-8710A to perform d a t a acquisition using
CH1 and
CH2 based on an external clock signal connects to the
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“EXT TRIG” input channel. Ex ternal trigger signal
connects to “EXT TRIG” input terminal is used for EXT
and EXT/5 trigger source selection. When selecting EXT
as trigger source, the external trigger levels voltage range
is limited to -3V and +3V. Whereas, if EXT/5 is selected
as
trigger source, external trigger level voltage range
can be expanded to -15V-+15V. (EXT/5 is only available
for 72-2650)
■AC line trigger: use AC line power as trigger source.
This can be significant application to observe the signals
correlated to AC line power for applications in lighting
equipment and power supply equipment R&D development.
2. Trigger mode: deciding the behavioural pattern of DSO
under no trigger event conditions. Three trigger modes
are provided for DSO: auto, normal and single.
■Auto trigger: Set to automatic trigger mode. The DSO
will continuously perform data acquisition without
triggering signal. When there is trigger signal, DSO will
automatically synchronise with the trigger signal.
Attention: when scanning, the waveform is set as 50ms/div
or slower time base, no trigger signal is allowed under “auto
trigger” mode.
■Normal trigger: Set to normal trigger mode. The DSO
will only perform data acquisition when trigger
conditions are satisfied. When the trigger condition is
not satisfied, DSO stops data collection.
■Single trigger: Set to single trigger mode. The DSO
will only perform one cycle of data acquisition when
trigger conditions are satisfied. When the trigger condition
is
not satisfied, DSO stops data collection.
2.4 Set the Acquire System
The user can change the data acquisition setting of the
DSO by pressing the ACQUIRE button as shown in the
figure below 72-2650/72-10510/72-8225A /72-8705A/
72-8710A DSO.
72-2650 DSO
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72-10510/72-8225A/72-8705A/72-8710A
Figure 2-17 Function Key of Sampling System
While ACQUIRE button is pressed, the function menu
will change to set the data acquisition setting for the DSO.
Table 2-11 Acquire Menu
Function
Menu
Settings
Description
Set to sampling acquisition mode.
Set to peak value acquisition mode.
Set to average acquisition mode.
Average
Peak value
Sampling
Acquisition
Mode (F1)
At the average sampling mode, set
average number by using the
multipurpose knob (Average number
can be set to 2,4,8,16,32,64,128,256)
2~256
Averages
(@)
Set to Real-time sampling.
Set to Equivalent sampling.
Real-time
Equivalence
Sampling
（F3）
Turn on fast acquiring. Waveform
capturing rage up to at 2k
waveform/second.
Turn off fast acquiring.
ON
OFF
Fast Acq
（F4）
By changing the acquisition setting of the DSO, the user
can observe the input signal in a different manner. The
example below is a noise waveform acquired by different
acquisition setting of the 72-2650/72-10510/72-8225A /
72-8705A/72-8710A DSO.
Figure 2-18 shows the original signal using sampling
acquisition, the user can see that the waveform display is
very noisy.
Figure 2-19 shows the same signal with average
acquisition of a 32 number, please observe that the
waveform display becomes much smoother.
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Figure 2-18 Waveform using sampling method
Figure 2-19 Waveform using average
acquisition of 32 number
Notice:
1. Select real-time sampling mode when observing
single
signal.
2. Select equivalent sampling mode when observing
high
frequency periodic signal.
3. Select peak detection mode when hoping to observe
the signal envelope for any modulation signal.
4. Select average sampling mode when hoping to
reduce
the random noise in displayed signals.
Explanation of nouns
Real-time sampling mode:
Data sampling at the real-time sampling rate of the
system. This is used to observe any waveform
within the sampling rate of the system.
Equivalent sampling mode:
Data sampling at higher than maximum sampling
rate of the system. This is used to observe any
periodical waveform at beyond the maximum
sampling rate.
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2.5 Set The Display System
The user can change the display setting of the DSO by
pressing the DISPLAY button of the 72-2650/72-10510/
72-8225A /72-8705A/72-8710A DSO as the figure shows below.
72-2650 DSO
72-10510/72-8225A/72-8705A/72-8710A DSO
Figure 2-20 Function Keys of Display System
After pressing the DISPLAY button, the function
Table 2-12 Display Menu
Function
Menu
Settings
Description
Display as vector of sampled data points
Display any of the sampled data points
Vector
Dots
Types (F1)
Display Y-axis as voltage level of
input signal and X-axis as time
YT
Display Y-axis as CH2 voltage level
of input signal and X-axis as CH1
voltage level of input signal
Format (F2)
XY
Real-time updating (Display) of the
acquired signal
Display the acquired signal every 1s
Display the acquired signal every 2s
Display the acquired signal every 5s
Accumulate display all the acquired
Infinite
5s
2s
1s
Off
Persist (F3)
Set the brightness of the waveform
by multi-purpose node between
1%-100% brightness
1 % 100%
Waveform
Brightness
(@)
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menu will change to the display setting for the DSO.
Page 45
XY Mode
The user can enter the X-Y mode by pressing the
Display button
and select F2. In this mode, CH1
and CH2 are required to be applied simultaneously.
The figure below shows an example for the XY mode display
Figure 2-21 Waveform Display in XY Mode
Attention:
The following functions will be disabled in XY display mode:
●
Automatic measurement
●
Cursor measurement
2.6 Set The Storage and Load System
The
user can enter the storage and load menu by
pressing
the STORAGE button.
72-2650 DSO (Top)
72-10510/72-8225A/72-8705A/72-8710A DSO (Down)
Figure 2-22 Function Key of
Sampling System (STORAGE)
The below steps will guide you to store a waveform
in
the internal memory of the DSO:
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Pres s the Storage bu tton and you will see t he
following menu:
Table 2-13 Waveform Storage Menu
Function
Menu
Settings
Description
Type (F1)
Wave Select to store an acquired waveform
Select waveforms from CH1 channel
to be saved
Select waveforms from CH2 channel
to be saved
CH1
CH2
Source(F2)
Destination (Position of the internal
memory) where the waveform will be
saved. There are 20 sets of internal
memory available to storage
waveform navigated by the
multipurpose knob.
1～20Dest (@)
Store waveform
Go to the next page
Save
Next page
1/2
Press F2 to select the waveform source to be saved.
Use the multi-purpose knob to select the storage memory
destination.
Press F4 to store the waveform.
Attention:
Any storage of the waveform will overwrite previous
memory space in the same memory location.
To load a waveform from the internal memory of the
DSO, please refer to Chapter 2 of this user manual.
The below steps will guide you to store a waveform
to a USB device:
Insert a USB disk into the “USB Host” interface. If
the USB is connected successfully, you should see the
system message “USB device install successful”
shown on the screen.
Press the Storage button and you will see the following
menu:
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Table 2-14 Waveform Storage Menu (Page 1)
Function
Menu
Settings
Description
Type (F1)
Wave Select to store an acquired waveform
Select waveforms from CH1 channel
to be saved
Select waveforms from CH2 channel
to be saved
CH1
CH2
Source(F2)
Destination (position of the internal
memory) where the waveform will be
saved. There are 20 sets of internal
memory available to storage
waveform navigated by the
multipurpose knob.
1～20Dest (@)
Store waveform
Go to the next page
Save
Next
1/2 [F5]
Function
Menu
Settings
Description
Press F5 to go to next function menu.
User should see below function menu.
Table 2-14 Waveform Storage Menu (Page 2)
Select to store an acquired waveform
into the internal memory of the DSO
Select to store an acquired waveform
onto the USB device
DSO
USB
Desk (F1)
Select normal data length (Same
data number as display)
Select long data length (Same as
data number as data buffered in the
DSO FIFO)
Long
Normal
Length (F2)
Previous
2/2 [F5]
Go to the previous page
Press F1 to select USB as storage destination.
Press F2 to select normal storage.
Press F5 to go to the first page of the function menu.
Use the multi-purpose knob to select the storage
memory destination (please note that there will be 200) .
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Function
Menu
Settings
Description
Select to store an acquired waveform
Select to store a DSO setting
Wave
Setup
Types (F1)
Press F4 to store the waveform
Remove the USB stick.
Attention:
Any storage of the waveform will overwrite previous
memory space at the same memory location. If “Long”
length data is selected, the data cannot be loaded
back to the DSO display and is only able to load through
Software Application. To load a waveform from the USB
desk, please refer
to Chapter 2 of this user manual.
The below steps will guide you on how to store DSO
setting to the internal memory of the DSO:
Press the Storage button and you will see the following
menu.
Table 2-15 Waveform Storage Menu (Page 1)
Select waveforms from CH1
channel to be saved
Select waveforms from CH2 channel
to be saved
CH1
CH2
Source(F2)
Dest (@)
Destination (position of the internal
memory) where the waveform will be
saved. There are 20 sets of internal
memory available to store
waveform navigated by the
multipurpose knob.
1～20
Store waveform
Save [F4]
Next page
1/2
Go to the next page
Press F1 to select Setup.
Use the multi-purpose knob to select the storage
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memory location.
Press F4 to store the DSO setting
Attention:
Any storage of the DSO setting will overwrite previous
memory space at the same memory location.
Table 2-15 DSO Setting Storage Menu (Page 2)
Function
Menu
Settings
Description
Select to store a DSO settingSetup
Types (F1)
Setup(@)
Destination (position of the internal
memory) where the Setup will be
saved. There are 20 sets of internal
memory available to storage Setup
navigated by the multipurpose knob.
1～20
Press to store a Setup into the
selected storage memory destination
Press to load a Setup from the
selected storage memory destination
Save[F3]
Load[F4]
Function
Menu
Settings
Description
Select to store an acquired waveformWave
Types (F1)
From the DSO setting storage menu (Page 1)
Use the multi-purpose knob to select the storage memory
location.
Press F4 to load the pre-stored DSO setting.
If there is not a pre-stored DSO setting at the memory
location, there will be a warning “no data in the position”
Below step will guide you to store a bitmap to USB
device:
Insert a USB disk into the “USB Host” interface. If the
USB is connected successfully,you should see the “USB
device install successful” notification on the screen.
Press the Storage button and you will see the following
menu:
Table 2-16 Bit Map File Storage Menu (Page 1)
Select to store a DSO setting Setup
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Function
Menu
Settings
Description
Select to store a Bit Map file into
the USB disk only
Bit Map Types (F1)
Types (F1)
Select to store a Bit Map file into
the USB disk only
Bit Map
Select waveforms from CH1 channel
to be saved
Select waveforms from CH2 channel
to be saved
CH1
CH2
Source(F2)
Destination (position of the internal
memory) where the waveform will be
saved. There are 20 sets of internal
memory available to store a
waveform navigated by the
multipurpose knob.
1～20
Dest (@)
Store waveform
Go to the next page
Save
Next
1/2 [F5]
Press F1 to go to Bit Map selection.
The user should see the below function menu.
Table 2-16 Bit Map File Storage Menu (Page 2)
Destination (position of the USB
desk memory) where the bit map file
will be saved. There are 200 sets of
USB disk memory available to
store a bitmap file navigated by the
multipurpose knob.
Dest (@) 1～200
Press to store bitmap fileSave[F4]
Use the multi-purpose knob to select the storage memory
destination (please note that there will be 200 memory
locations available).
Press F4 to store the bitmap file into a USB disk;
Remove the USB stick.
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2.7 Set The Utility System
By pressing the UTILITY function button on the menu
area, the user can set a different utility setting, where the
button locations are shown in the figure below.
72-2650 DSO (Top)
72-10510/72-8225A/72-8705A/
72-8710A DSO (Down)
Figure 2-23 Function Key of
Sampling System (Function)
There are three function menu pages at the Utility menu,
all of which are shown in Tables 2-17, 2-18 and 2-19.
Function
Menu
Settings
Description
Table 2-17 Utility menu page 1
Self-Adj
(F1)
Press to execute self- calibration
function
Leave self-calibration
Execute
Close
Set waveform pass/fail operation
See Table
2-22.
Pass/Fail
(F2)
Recorder
(F3)
Set waveform recording operation
See Table
2-20.
Press to change to different system
language
Language
Language
(F4)
Press to go to next utility function
menu page
Next(1/3)
(F5)
Function Menu
Settings Description
Change the skin for the function menu
Table 2-18 Utility menu page 2
Reset to factory default settingReset (F1)
Adjust the grid brightness by
using the multi-purpose knob
Skin (F3)
Grid Bright(@)
1%-100%
Next 2/3 Go to the next page
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Function
Menu
Settings
Description
Table 2-19 Utility menu page 3
Version (F1)
Press to view the system version.
Press to enter the LAN address
setting. Notice that LAN is an option
for 72-2650 DSO.
LAN (F2)
To turn ON frequency counter
To turn OFF frequency counter
Frequency
Counter *
(F4)
ON
OFF
First 3/3(F5)
Back to page 1
Function
Menu
Settings
Description
The waveform recorder function at the 72-2650/72-10510/
72-8225A /72-8705A/72-8710A DSO is
generally easy to operate.
The user should set up Source and Operation as shown
in the below table.
Table 2-20 Waveform Recorder Menu
Select CH1 as recording signal source
Select CH2 as recording signal source
Select CH1and CH2 as recording
signal sources
CH1+CH2
CH1
CH2
Source (F1)
Sub-menu for operation
See Table
2-21 for
detail
Save waveform recording into USB
memory.
Select from 1-200 memory location.
Press F3 to save.
Operation
(F2)
Save (@)
(F3)
Load the waveform recording into
USB memory.
Select from 1-200 memory location.
Press F3 to load.
Load (@)
(F4)
Press to return to Utility function menuReturn (F5)
After pressing the F2 button on the waveform recorder
menu, you should see the waveform recorder operation
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menu below.
Table 2-21 Waveform Recorder Operation Menu
Function
Menu
Settings
Description
One of the very useful functions for the 72-2650/
72-10510/72-8225A /72-8705A/72-8710A DSO is the
pass/fail detection function.You can create a template
of pixels area to compare with the input signal.
The user can also select the output condition for the logical
result between the templates of area and the input source.
You can enable the PASS/FAIL function by pressing
F1 on the PASS/FAIL function menu. After turning on
this function, you can see the total number of waveforms
being processed, the number of waveforms that pass and
the number of waveforms that fail on the LCD screen.
Table 2-22 Pass/Fail function menu
Press to turn on the PASS/FAIL function
Press to turn off the PASS/FAIL function
ON
OFF
Status (F1)
Select CH1 as the detection signal source
Select CH2 as the detection signal source
Select MATH result as the detection
signal source
Select RefA as the detection signal
source
Select RefB as the detection signal
source
CH1
CH2
MATH
RefA
RefB
Source (F2)
Function
Menu
Settings
Description
Select the logical result as input signal
within the template of pixels area
Select the logical result as input signal
outside of the template of pixels area
Same as Pass output condition; stop
once detected
Same as Fail output condition; stop
once detected
Fail/Halt
Pass/Halt
Fail
Pass
Output (F3)
Press to start waveform recording;
the number waveform being
recorded is show on the screen.
Record (F1)
Press to start waveform replay.
RePlay (F2)
Press to stop waveform recording.Stop(F3)
Return (F4)
Go back to previous menu
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Function
Menu
Settings
Description
See Table
2-23.
Press to create template of pixel area.
Return to Utility Function Menu
Template
(F4)
Back (F5)
After pressing the F4 on the Pass/Fail function menu,
you will be able to create a t emplate of pixels to be
compared.
Table 2-23 Template Setting
According to adjustment, build
horizontal and vertical Pass/Fail
tolerance range.
Create
(F1)
/
/
Press [F2] to select horizontal
length and use the multi-purpose
knob to set the pixel length for the
horizontal length.
1-200
Pixel
Horizontal
(F2 and @)
Press [F3] to select vertical length
and use the multi-purpose knob to
set the pixel length for the vertical
length.
1-100
Pixel
Vertical
(F3 and @)
Return (F4) Return to pass detection menu.
You will need to press F1 to confirm creating the
pixel template after setting the horizontal and vertical
length of the pixels.
2.8 Set The Measurement Parameters
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO support u p to 2 8 of the aut omatic wavef orm
measurement parameters. You can view at most
five of the
measurement parameters at the same time on F1-F5
function menu. To s ee measurement parameters,
please press MEASURE on the control
panel.
72-2650 DSO(Top) ,
72-10510/72-8225A/72-8705A/72-8710A DSO (Down)
Figure 2-24 Function Key of (Auto measurement parameter)
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Function
Menu
Settings
Description
For each of the measurement parameters located on
the F1-F5 function menu, you can press F1-F5 to set the
view of the parameter (Measurement sub menu)
Table 2-24 Measurement Sub Menu
Return to measurement
parameter function menu
Back (F1)
Select the CH1as source
Select the CH2 as source
CH1
CH2
Source (F2)
Select different Voltage parameters
Select different Time parameters
Press to display all of the measurement
parameter of the input source. Or,
press to turn off the parameter display.
Parameters
(F5)
Volt (F3)
Source (F2)
Voltage Parameter
B elow are th e aut oma tically measured vo ltage
parameters f or the 72-2650/72-10510/72-8225A /
72-8705A/72-8710A and its definitions:
Vpp: Peak-to-peak voltage.
Vmax Maximum voltage level.
Vmin: Minimum voltage level.
Vmid: Medium voltage level.
Vamp: The voltage amplitude from waveform top to
bottom.
Vtop: The voltage value from waveform top level to
GND (Ground).
Vbase: The voltage value from waveform base level to
GND (Ground).
Over-shoot: The ratio between (Vmax – Vtop) and
voltage amplitude (Vamp) in percentage.
Pre-shoot: The ratio between (Vmin – Vbase) and
voltage amplitude (Vamp) in percentage.
Average:
The average amplitude of signal within 1 cycle.
Vrms: Root-mean-square value (effective value).
Time parameter
RiseTime: The time of waveform amplitude rising from
10% to 90%.
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FallTime: The time of waveform amplitude falling from
90% to 10%.
+Width:
The width of positive pulse at amplitude of 50%.
-Width:
The width of negative pulse at amplitude of 50%.
Delay (rising edge): The delay time between rising
edges. Delay (falling edge): the
delay time between falling edges.
+Duty: The specific value of positive pulse width and
cycle.
-Duty: The specific value of negative pulse width and
cycle.
2.9 Set The Cursor Measurement
The user can press the CURSOR button to enable the
cursor measurement function for 72-2650/72-10510/
72-8225A /72-8705A/72-8710A DSO, where the location
of the CURSOR button can be found on the figure below.
72-2650DSO (Top),
72-10510/72-8225A/72-8705A/
72-8710A DSO (Down)
Figure 2-25 Function Key of
Sampling System (CURSOR)
72-2650/72-10510/72-8225A /72-8705A/72-8710A
DSO supports 3 different types of cursor measurements.
Volt: Voltage (Vertical System)
Time: Time (Horizontal System)
Track: Volt and Time working at the same time.
At the Volt cursor measurement, the user should be able
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to see the ΔV, Va, and Vb parameters on the display
screen, where
ΔV is the difference between Va and Vb.
The user can move the Va cursor by rotating the multi-
purpose knob by default. Once the location of the Va
cursor is moved to the ideal location, the user can press the
multi-purpose knob (the SELECT button on the 72-2650
DSO) to switch to Vb; the user can move the Vb cursor by
rotating the multi-purpose knob in the same way as
moving the Va cursor.
At the Time cursor measurement, the user can repeat
the similar operation as Volt cursor measurement by
using the multi-purpose knob and the SELECT
button on the 72-2650 series DSO.
The Track cursor measurement mode is similar to the
Time cursor measurement except, it will automatically track
any of the voltage level where the time cursor is pointing
at the screen.
After activating the COARSE button, there will be
a quicker response for the cursor movement.
Chapter III System Message
Example and Troubleshooting
System Message Examples
“Operation at limit”:
System will show “Operation at limit” when the user
example, setting the horizontal scale to more than 50.00s.
“Saving” Progress Bar
When the user is performing saving bitmap file, waveform
and setup file, the system will show the “Saving” progress
bar. Please be patien t until the end of the saving
progress complete.
“Loading” Progress Bar
When the user is loading a waveform file or setup
file, system will show the “Load” progress bar.
Please be patient until the end of the loading progress
is complete.
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attempts to operate any activity beyond the system limit; for
Page 58
Troubleshooting :
1. After pressing the power button of the DSO, the
screen
is dark and will not display:
①. Check if the power connector is properly connected
to power socket
②. Check if the power button is pre ssed to the ON
position.
③. Restart the instrument after completing the above
checks.
④. If the product still does not work normally, please
contact Tenma.
2. Cannot acquire signal waveform
①.Check if the BNC connector of the probe is properly
connected to DSO
②.Check if the probe is working properly by connecting
the probe to “Probe compensation signal output” and
check for any signal waveform;
③. Check if the probe is properly connected to the device
under test.
④. Try to acquire signal again.
3. The voltage amplitude measured is 10 times higher
or lower than the actual value:- Check if the attenuation
coefficient of the channel matches with the attenuation
rate of the probe used.
4. The signal waveform is not stable:
①. Check if the trigger source setting in the trigger menu
is matched with the actual channel input of the signal.
②. Check the trigger type: Most of the signal can be
triggered by edge trigger mode; while video signal can
be triggered by video trigger mode. Only in the correct trigger
mode can the waveform be stably displayed.
③. Change the coupling to “high frequency rejection” or
“low frequency rejection” display to filter out the high
frequency or low frequency noise that maybe interfering
with the trigger.
5. No waveform display after pressing RUN/STOP key
①. Check if the trigger level exceeds the waveform range
and the trigger mode is “Normal” or “Single”, if yes,
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manually set the trigger level to the centre; or change
the trigger mode to AUTO
②. Or press AUTO button next to the RUN/STOP
button, the above setting will be completed automatically.
6. The waveform is refreshing slowly:
①
. Check if the Acquire mode is in “Average” mode
②. In “Average” mode, waveform is refreshing slowly
because it displays the average value of the waveform
to reduce the random noise in displayed signal.
③. Change to “Sample” mode or “Peak” mode for the
desired display.
7. The waveform display does not smooth out.
①. The horizontal time division value may be too small,
increase the horizontal time base division to improve
the waveform smoothness.
②. If the display type is “Vector”, the signal waveform may
not smooth between the dots. This can be improved by
setting the display type to “Dot” mode.
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Chapter IV Technical Information
Appendix A: Technical Specification
Unless otherwise specified, all technical specifications are applicable to the probes with the attenuation switch set
as 10× as well as 72-2650/72-10510/72-8225A /72-8705A/72-8710A DSO. DSO must first meet the following two
conditions to meet those
specification standards:
The instrument must continuously operate for over half an hour within the operating temperature.
Technical Specification
Sampling System Specification
Sampling rate
Sampling rate
72-2650
72-10510
Real-time
Equivalence
1GS/s
250MS/s
50GS/s
1GS/s
50GS/s
1GS/s
50GS/s
500MS/s
25GS/s
N can be chosen among 2, 4, 8, 16, 32, 64, 128 and 256; N is the number of average samples.Average
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Input Channel Specifications
Input coupling
Input impedance
Probe attenuation coefficient
Maximum input voltage
Time Delay between Channels (Typical)
DC, AC and GND
72-2650
72-10510/U72-8225A/
72-8705A/72-8710A
1±2% MΩ with 21±3pF
1±2% MΩwith24±3pF
1×，10×，100×，1000×
400V (DC+AC peak value, 1MΩ input impedance)
150ps
Horizontal System Specification
Waveform interpolation
Horizontal resolution
Record length
Storage depth
Scanning scope
Sin（x）/x
25p/div
2×512k sampling point
25k
72-8705A/72-8710A
72-10510
51
2ns/div-50s/div
10ns/div-50s/div
72-8225A
5ns/div-50s/div
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Sampling rate and delay time accuracy
Measurement accuracy of time interval
(△T) (full bandwidth)
±50ppm (any time interval≥1m)
Single time: ± (1 sampling time interval+50ppm×reading+0.6ns)
>16 average values: ± (sampling time interval+50ppm×reading+0.4ns)
Vertical System Specifications
Analog-to-digital converter (A/D)
8-bit resolution, sampling at two channels at the same time
72-2650
72-10510/72-8225A/
72-8705A/72-8710A
Deflection coefficient (V/div) range
(at input BNC)
2mV/div-5V/div
1mV/div-20V/div
Vertical range
Selectable bandwidth limitation (Typical)
±10div (wherein 72-2650 is ±5div)
20MHz
Low frequency response (AC coupling, -3dB)
≤10Hz (at BNC)
72-2650 ：
±4% （When vertical sensitivity is 2mV/div or 5mV /div）
±3% （When vertical sensitivity is 10mV/div- 5V /div）
DC gain accuracy
(sampling or average sampling mode)
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72-10510/72-8225A72-8705A/72-8710A：
±5% (When vertical sensitivity is 1mV/div or 2mV /div)
±4% (When vertical sensitivity is 5mV/div)
±3% (When vertical sensitivity is 10mV/div -20mV /div)
DC gain accuracy
(sampling or average sampling mode)
72-2650：
When vertical position is 0 and N≥16:
± (4%×reading + 0.1div + 1mV) at 2mV /div and 5mV /div;
± (3%×reading + 0.1div + 1mV) from 10mV /div to 5V /div;
When vertical position is not at 0 and N≥16:
±[3%×(reading + vertical position reading) + (1%×vertical position reading)]+0.2div)
from 2mV/div to 200mV/div + 2mV
The setting value from 200mV/div to 5V/div plus 50mV
72-10510/72-8225A/72-8705A/72-8710A：
When vertical position is 0 and N≥16:
± (5%×reading+0.1div+1mV) and selects 1mV /div or 2mV /div;
± (4%×reading+0.1div+1mV) and selects 5mV /div;
± (3%×reading+0.1div+1mV) and selects 10mV /div or 20mV /div;
When vertical position is 0 and N≥16:
±(3%×(reading + vertical position reading) + (1%×vertical position reading)]+0.2div)
The setting from 5mV/div to 200mV/div plus 2mV; the setting value from
200mV/div to 20V/div plus 50mV
DC measurement accuracy
(average sampling mode)
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Under the same setting and environmental conditions and after averaging the
captured waveforms with a quantity of ≥16, the voltage difference (ΔV)
between any two points on the waveform: ± (3%×reading+0.05div)
Measurement accuracy of voltage difference
(△V) (average sampling mode)
Note: the range of deflection factor for UTD 2025C is 2mV/div-10V/div (in the place of input BNC)
Bandwidth For Each Model
Model
72-2650
72-10510
Analog Bandwidth Real-Time Bandwidth Rise Time
200MHz
100MHz
50MHz
25MHz
100MHz
100MHz
50MHz
25MHz
1.8ns
3.5ns
7ns
50MHz
50MHz
7ns
14ns
Trigger System Specifications
Trigger sensitivity
≤1div
Interior
EXT)
EXT/5*
±15V
±3V
From the screen centre ±5div
Range of trigger level
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Interior
EXT
EXT/5*
±(0.3div×V/div) (within±4 div from the screen centre)
±(6% setting value+40mV)
±(6% setting value +200mV)
Trigger level accuracy (Typical) applicable for
the signal with rising and falling time ≥20ns
Pre-trigger capacity
Normal mode/scan mode, pre-trigger/delay trigger, the pre-trigger depth adjustable
72-2650
72-10510/72-8225A/
72-8705A/72-8710A
100ns - 1.5s
80ns - 1.5s
Hold-off range
Operate under the condition of input signal frequency of ≥50Hz
Set the level to 50% (Typical).
Edge trigger
Edge type
Rise, fall, rise and fall
Pulse width trigger
Trigger mode
Pulse width range
20ns - 10s
(>, <, and =) positive pulse width and (>, <, and =) negative pulse width range
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Video trigger*
Interior
EXT)
EXT/5*
2div Vpp
400mV
2V
Trigger sensitivity (video trigger, Typical)
Support standard NTSC and PAL, and the line number scope is respectively
1-525 (NTSC) and 1-625 (PAL).
Signal model and line/field frequency
(video trigger type)
Alternating trigger
Edge, pulse width, and video
Edge, pulse width, and video
CH1 trigger
CH2 trigger
Note*: EXT/5 function only for 72-2650, and video trigger function only for 72-2650/72-10510.
Measurements
Voltage difference between cursors (△V),
Time difference between cursors (△T),
Reciprocal of △T (Hz) (1/△T))
Voltage value and time value of point of waveform
Cursor
Cursor Parameters
Track
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Vpp, Vamp, Vmax, Vmin, Vtop, Vbase, Vmid, Average, Vrms, Overshoot,
Preshoot, Frequency, Period, RiseTime, FallTime, +Width, -Width, +Duty,
-Duty, Delay
Automatic measurement
Math operation
+, -, ×, ÷
Store (waveform and setting)
20 groups of waveforms, and 20 kinds of settings
Window
Sampling size
Hanning, Hamming, Blackman, Rectangle
1024 points
FFT
±3degrees
Phase difference
Lissajous figure
Trigger frequency meter
Reading resolution
Trigger sensitivity
Accuracy (Typical)
6 bits
≤30Vrms
±51ppm (+1 character)
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General Technical Specification
Display
72-2650
72-10510/72-8225A
LCD with diagonal
of 178mm (7-inch)
400 horizontal×RGB×240
vertical pixels
LCD with diagonal of
145mm (5.7-inch)
Displays types
Display resolution
320 horizontal×RGB×240
vertical pixels
Display colour
Colour
Waveform luminance
Backlight intensity (Typical)
300nit
Adjustable (colour)
Probe compensator output
Output voltage (Typical)
Frequency (Typical)
About 3Vpp, when the load≥1MΩ
1kHz
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72-8705A/72-8710A
LCD with diagonal of 178mm(7-inch)
800 horizontal×RGB×480 vertical pixels
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Interface function:
72-10510/72-8225A/72-8705A/72-8710A
72-2650 1 USB Device; 1 USB Host
1USB OTG
Standard configuration
Optional components
72-2650 has optional LAN communication port
Power Source
Power voltage
Power consumption
Fuse
100-240VAC RMS，45-440Hz CAT II
Less than 30 VA
F1.6AL 250V（Fuse is located inside the instrument housing）
Environment Specifications
Temperature Range
Operating Temperature Range:0℃～+40℃
Storage Temperature Range: -20℃-+60℃
Cooling
Operating Humidity Range:
<35℃: ≤90%RH , 35℃-40℃: ≤60%RH
Built-in cooling fan
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Operating Altitude
Below 3,000m
Mechanical specifications
72-2650
72-10510/72-8225A
72-8705A/72-8710A
W
H
D
Excluding package
Including package
320mm
150mm
130mm
2.5kg
4.0kg
306mm
147mm
122mm
2.2kg
3.3kg
Size
Weight
IP protection
IP 2x
Recommended calibration Interval:The recommended calibration interval is every one year
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Appendix B: Accessories of
72-2650/72-10510/72-8225A
72-8705A/72-8710A DSO
Standard accessories:
● Two probes (selectable for 1:1 and 10:1).
Please refer to instructions on probe accessories for
details.
ll probe conforming to EN61010-031 standards.
-When the switch is at 1× position, it belongs to
150V CAT II.
-When the switch is located in 10× position, it
belongs to 300V CAT II.
● One power cable
● One User Manual
● Oscilloscope communication
control software CD
● One USB Cable
Appendix C: Maintenance
and Cleaning Maintenance
General Maintenance
Please do not store or place the instrument in any
places where the LCD of the instrument is exposed to
sunlight directly.
Caution: Please do not stain the instrument or probe
with spray, liquid or solvent, so as to avoid damaging the
instrument or probe.
Clearing
Check the instrument and probe frequently. Clean the
surface of the instrument according to the following
steps:
1. Please wipe the surface of the instrument and probe
with a soft cloth. Do not to scratch the LCD screen.
2. Wipe the instrument with a wet cloth after disconnecting
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Page 72
the power supply. Use detergent or clear water to clean.
Do not use any abrasive chemical cleaning agent to
avoid damaging the instrument or probe.
Warning: Please make sure that the instrument is
completely dry before powering on again, to avoid
electrical short circuit or injury.
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72-2650/72-10510/72-8225A /72-8705A/72-8710A user manual
INFORMATION ON WASTE DISPOSAL FOR
CONSUMERS OF ELECTRICAL & ELECTRONIC
EQUIPMENT.
When this product has reached the end of its life it
must be treated as Waste Electrical & Electronics
Equipment (WEEE). Any WEEE marked
products must not be mixed with general
household waste, but kept separate for the
treatment, recovery and recycling of the
materials used. Contact your local authority for
details of recycling schemes in your area
Page 73
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Page 74
序号 项目 内容
1
2
3
4
5
6
7
尺寸 尺寸：210X148mm
材质 封面用230克铜版纸,内页用80g书纸
颜色 单黑印刷
外观要求
装订方式 两枚大钉钉装
表面处理 无
印字完整清晰、版面整洁，无斑墨、残缺破损、毛边、装钉不齐等缺陷。
修改
DWH
设 计
MODEL
机型:
物料编号:110401105556X
Part NO.
CHK
审 核
APPRO.
批 准
说明书菲林做货要求：
8
REV.
0
韦英锁2016-03-15
UTD2000CL/
CEX/CE系列
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