Tenma 72-8710, 72-8705 Operating Manual

OPE RATIN G

MAN UAL

Introduction

Dear valued customer,

Thank you for purchasing a Tenma instrument. To use your new product correctly, make sure you read this User Manual

carefully and completely before operation and pay particular attention to the “Safety Instructions” section.

Please keep this User Manual in a safe place after reading it carefully. For easy reference during future operation, we

recommend putting it alongside your Tenma product or in an easily accessible place.

● products are protected by patents granted and pending in the People's Republic of China and other countries.

● The Company reserves the right to change product specifications and prices.

suppliers. They are protected by the national copyright law and international conventions.

Information contained in this manual supercedes all information in previously published versions.

is the registered trademark of Farnell.

DSO Series User Ma nual

If this product is sold or assigned by the original purchaser to a third is to be delivered to an address within the country where the

party within three years of purchase, the new owner should note maintenance centre operates, Tenma shall pay the cost of returning the

that warranty is available for a period of three years from the day product to the

the original purchaser acquired the product from Tenma or an

destination, all freight, custom duty, tax and other costs will be paid by

authorized dealer. The probe, other accessories and fuses are not

the customer.

covered by warranty.

This warranty does not apply to any defect, malfunction or damage

If any genuine defect is found during the valid warranty period, Tenma

caused by accident, normal wear and tear of mechanical parts, any

has the option to repair the defective product without any charge for

form of application other than the stated ones, improper use, improper

parts or labor, or replace it with another product (at the discretion of

maintenance or poor maintenance. Under the warranty terms and

Tenma). Tenma may use parts, modules and replacement products that

conditions, Tenma has no obligation to provide the following services :

are brand new or repaired to a good-as-new standard. All old parts,

modules and products that are removed during replacement become

a) Repairing any damage arising from installation, repair or

properties of Tenma.

maintenance carried out by a non Tenma service representative;

b) Repairing any damage arising from improper use or connection

In this User Manual, “ customer” means an individual or entity

to incompatible equipment;

vested with the rights hereunder. To enjoy the warranty service,

the “customer” must report any defect to Tenma during the valid

c) Repairing any damage or malfunction arising from using a power

warranty period and make appropriate arrangement to allow

source not provided by Tenma;

servicing. The customer should pack the defective product in a

d) Servicing a product that has been modified or integrated with other

container and deliver it to a maintenance centre specified by Tenma.

products (such modification or integration makes repair more

The customer should also prepay all freight cost and provide a copy of

time consuming and difficult).

the original sales receipt issued to the original purchaser. If the product

DSO Series User Ma nual

To avoid fire and personal injury :

supercedes all other p re vi ou s warranties, whether e xp re ss or

implied. Tenma and its dealers wil l not make any im pl ie d

Use a correct power cable : Use only the specified power cable which

guarantee on t he salability or suitability of this product for any specific

is authorized in the country of use.

purpose. In the event of breach of warranty terms and conditions, repair

Remove the plug correctly : Do not remove the probe or testing cable

or replacement of the defective product shall be the only remedial

when they are connected to power.

measure offered by Tenma. Notwithstanding any prior notification of

Ensure good grounding : This unit is grounded by the ground wire of

potential damage that is indirect, special, consequential or inevitable,

the power cable. To avoid electric shock, the grounding conductor must

Tenma and its dealers shall bear no liability for any such damage.

touch the ground. Before connecting the input or output terminal,

ensure the unit is properly grounded.

Safety Instructions

Connect the probe of the digital storage oscilloscope : The probe

This unit is designed and manufactured strictly in accordance with

ground cable is the same as ground potential. Do not connect the

GB4793 safety requirements for electronic testing meters and

ground cable to non ground voltage or high voltage.

IEC61010-1 safety standards. It fully meets CAT II 600V insulation and

Check the rated values of all terminals : To prevent fire and

overvoltage requirements and Grade II anti-pollution safety standards.

excessive current shock, please check all rated values and label data.

To prevent personal injuries and damage of this unit or any other

Read the manual carefully and check the rated values before

devices connected to it, please take note of the following safety

connecting the unit.

precautions. To avoid potential hazards, use this unit strictly as

instructed by this User Manual.

Do not operate the unit with the chassis cover open : Do not operate

this unit when the outer cover or front panel is open.

Maintenance should only be carried out by a trained professional.

This w ar ra nt y is ma de available to this p ro du ct specifically and

DSO Series User Ma nual

Use suitable fuses : Only use specified fuse types and rated

Messages on the product : The following messages may appear

specifications.

on the product :

Avoid exposing circuitry : When power is on, never make contact with

“Danger” means potential damage that is immediate.

exposed adaptor or components.

“Warning” means potential damage that is not immediate.

When fault is suspected, stop operation : If you suspect a fault, ask a

“ Caution” means possible damage to this product or other

qualified maintenance professional to carry out inspection.

properties.

Icons on the product : The following icons may appear on the

Maintain good ventilation.

product :

Do not operate in humid conditions.

Do not operate in combustible and explosive conditions.

High voltage Caution! Refer to manual

Keep the product surface clean and dry.

Safety Messages and Symbols

Safety terminology used in this manual. The following messages may

Protective Ground terminal Ground terminal

appear in this manual :

ground terminal for chassis for testing

Warning : Warning statements identify conditions or practices that

could result in injury or loss of life.

Caution : Caution statements identify conditions or practices that

could result in damage to this unit or other properties

DSO Series User Ma nual

Preface

DSO oscilloscopes offer user-friendliness, outstanding technical

indicators and a host of advanced features. They are your perfect tools

This manual provides information on the operation of the DSO digital

to complete testing tasks swiftly and efficiently.

storage oscilloscopes series. Guidance is given in several chapters

as follows :

This manual is a user guide for two models of the digital storage

oscilloscope series :

Chapter 1 User Guide : Simple guide to oscilloscope functions

and installation.

Model Bandwidth Real-time Sampling Rate Display

Chapter 2 Instrument Setups : Guide to operation of the DSO

72-8705 50MHz

digital storage oscilloscope series.

72-8710 10 0M Hz

Chapter 3 Practical Example Illustrations : Example illustrations

are provided to solve various testing problems.

Chapter 4 System Prompts and Trouble-shooting :

Chapter 5 Servicing and Support :

Chapter 6 Appendixes :

Appendix A : Technical Indicators

Appendix B : Accessories for DSO Series Digital Storage

Oscilloscopes

Appendix C : Maintenance and Cleaning

Appendix D: Chinese and English Cross Reference Table for the

Front Panel

The DSO Digital Storage Oscilloscopes Series

1GS/s Color

DSO Series User Ma nual

DSO Oscilloscopes offer a user-friendly front panel with clear Dual analog channels; width range : mV/div ~ 20V/div

indications to allow access to all basic functions for easy operation.

High definition color LCD system, 400 x 240 resolution

The scaling and position buttons for all channels are optimally

Supports plug-and-play USB storage device. Communication

arranged for intuitive operation. As design is based on the familiar

with and remote control of computer through the USB device

practices of traditional instruments, users can use the new units

Automatic waveform and status configuration

without spending considerable time in learning and familiarizing

Storage of waveforms, setups and interfaces; waveforms and

with operation. For faster adjustment to ease testing, there is a [AUTO]

setups reproduction

key to instantly display the appropriate waveform and range position.

Fine window extension; precise analysis of waveform details and

Apart from being extremely user-friendly, DSO Oscilloscope have the

overview

high performance indicators and superb functions required for

Automatic measurement of 28 waveform parameters

speedy execution of measurement tasks. Thanks to 1GS/s real-time

Automatic cursor tracing measurement function

sampling and 25GS/s equivalent sampling, you can observe higher

Unique waveform recording and replay function

speed signals with your DSO Oscilloscope. The strong trigger and

Built-in FFT

analytical functions make it easy to acquire and analyse waveforms,

Multiple waveform mathematics functions (including add,

while the sharp and clear LCD and mathematics functions ensure

subtract, multiply and divide)

clear observation and reliable analysis of signal conditions.

Edge, pulse width and alternate trigger functions

Multilingual menu displays

Help messages in English and Chinese

The performance features listed below will explain why the DSO series

can fully satisfy your testing and measurement requirements:

DSO Series User Ma nual

DSO accessories :

2 x 1.2m, : / : probe. For details refer to the probe

instructions. These accessories conform with

EN 1 01 0-0 1 :20 08 standards

Power line conforming to international standards applicable in

the country of use

User Manual

USB connecting cable :

UT-D05 (two-terminal USB/HOST plug)

DSO oscilloscope communication control software (USB-

device)

1 1 10 1

6 3

DSO Series User Ma nual

Table of Contents

Item Page

Safety Instructions

Preface

Chapter 1 User Guide-------- --------- --------- --------- -- --------- --------- --------- --------- ------

General Inspection-- -- --------- --------- --------- --------- --------- -- --------- --------- -

Functional Check-- -- --------- --------- --------- --------- --------- -- --------- --------- ---

Probe Compensation-- --------- -- --------- --------- --------- --------- -- --------- --------

Automatic Setup for Waveform Display----- --------- --------- --------- -- --------- ------

Getting to Know the Vertical System------ --------- --------- -- --------- --------- --------

Getting to Know the Horizontal System------- -- --------- --------- --------- --------- -- --

Getting to Know the Trigger System------ --------- --------- -- --------- --------- --------

Chapter 2 Instrument Setups-------- --------- --------- --------- -- --------- --------- --------- -------

Setting the Vertical System-------- --------- --------- -- --------- --------- --------- -------

Setting the Horizontal System----------- --------- --------- --------- --------- -- --------- -

Setting the Trigger System-------- --------- --------- -- --------- --------- --------- -------

Alternate Trigger-- --------- --------- --------- -- --------- --------- --------- --------- -- ----

Setting the Sampling System---- --------- --------- --------- --------- -- --------- -------

Sett in g the Displ ay S ystem---- --------- --------- --------- -- --------- --------- -------

DSO Series User Ma nual

Item Page

Storage and Recall --- --------- --------- --------- -- --------- --------- --------- --------- --

Utility Function Setup-- --------- --------- --------- -- --------- --------- --------- --------- -

Au to matic Measu rement--- --------- --------- --------- -- --------- --------- --------- --

Cursor Measurement -- --------- --------- --------- -- --------- --------- --------- ---------

Using the Run Button--------- -- --------- --------- --------- --------- -- --------- --------- -

Chapter 3 Practical Example Illustrations------ --------- -- --------- --------- --------- --------- -----

Illustration 1 : Measuring simple signals------- -- --------- --------- --------- --------- ---

Illustration 2 : Observing the delay and time-lapse caused by a sine wave signal passes through the circuit ---------------------------------------------------

Illustration 3 : Acquiring single signals------ --------- --------- --------- -- --------- ------

Illustration 4 : Reducing random noise of signals----- --------- -- --------- --------- -----

Illustration 5 : Using the cursors for measurement----- -- --------- --------- --------- ---

Illustration 6 : Using the X-Y function-- --------- --------- --------- --------- ----------- ---

Illustration 7 : Using the USB upgrade programme----- ----------- --------- --------- ---

Illustration 8 : Screen copy----------- --------- --------- --------- --------- -- --------- -----

DSO Series User Ma nual

Item Page

Chapter 4 System Prompts and Trouble-shooting--------------------------------------------------------

Definitions of System Prompts--------------------------------------------------------------------

Troubleshooting--------------------------------------------------------------------------------------

Chapter 5 Technical Indicators---------------------------------------------------------------------------------

Appendix A : Technical indicators----------------------------------------------------------------

Appendix B : Accessories for DSO Series Digital Storage Oscilloscope ----- -

Appendix C : Maintenance and Cleaning------ --------- --------- --------- -- --------- ---

Index ---- --------- -- --------- --------- --------- --------- -- --------- --------- --------- --------- ---

DSO Series User Ma nual

front panel. The functions of knobs are similar to other Oscilloscopes.

Chapter 1 User Guide

On the right you will find the screen copy key (PrtSc) which enables you

Your DSO Series digital storage oscilloscope is a small and compact

to save the current screen in an external USB device in picture format

benchtop device. The user-friendly front panel enables easy operation.

and five menu operation keys (designated as [F1] to [F5] from top

This chapter will guide you through basic testing steps.

down). With these keys you can set up different options of the current

menu. The other keys are function keys. You can use them to enter

This chapter provides notes on the following :

different function menus or access particular functions directly.:

General inspection

Functional check

Probe compensation

Automatic setups for waveform display

Getting to know the vertical system

Getting to know the horizontal system

Getting to know the trigger system

When beginning to use your DSO oscilloscope first familiarize yourself

with the front panel. This chapter briefly describes the operation and

functions of the front panel, so you can get started with your DSO series

digital storage oscilloscope as quickly as possible.

Your DSO oscilloscope comes with a front panel with at-a-glance

functions for easy operation. There are knobs and function keys on the

DSO Series User Ma nual

Figure 1-1 DSO Series Digital Storage Oscilloscope

DSO Series User Ma nual

External trigger

inputt

Probe compensation

signal output

Vertical controls

Horizontal controls

Trigger controls

Operation

controls

Frequently

Used Menus

Multifunction

control knob

Analog

signal input

USB Host interface

Figure 1-2 Schematic Diagram of the DSO Front Panel

DSO Series User Ma nual

Figure 1-3 Schematic diagram of the display interface

Tri gg er s ta tu s di sp la y

Displaying the horizontal trigger position

Displaying the central graticule time

Displaying the vertical graticule factor of the channel

Displaying main time base setup

Waveform display window

The menu varies with individual function keys

CH1 icon

Ch2 icon

DSO Series User Ma nual

General Inspection Functional Check

Carry out a quick functional check in the following steps to make sure

We suggest checking your new DSO oscilloscope in the following

your oscilloscope is operating normally.

steps.

1. Check the unit for possible shipping damages

1. Power on the unit

If the package carton or foam plastic protective lining is seriously

Power on the unit. AC power supply voltage range is 100V AC to 240V

damaged, please arrange for exchange immediately.

AC, frequency Hz- Hz. After connecting to power, start the

self calibration process on the optimal oscilloscope signal path at

2. Check the accessories

greatest measurement accuracy. Press the [UTILITY] button and

A checklist of accessories that come with your DSO oscilloscope is

[F1], then press F ] to go to the next page and press [F1]. To

provided in the section “ Accessories for DSO Series Digital

recall DEFAULT SETUP, see Figure 1-4.

Storage Oscilloscope” of this user manual. Please check any

After completing the above steps, press CH1] to enter the CH1 menu.

missing items against this list.

If any item is missing or damaged, please contact your Tenma dealer or

our local office.

3. Thorough inspection of the entire unit

If the exterior of the unit is damaged, or it is not operating normally, or it

fails to pass the performance test, please contact your Tenma dealer or

our local office.

In the event of any shipping damages, please retain the packaging and

notify our shipping department or your Tenma dealer. We will be glad to

arrange maintenance or repair.

45 44 0

[ 5

[

DSO Series User Ma nual

2. Accessing signals

Your DSO oscilloscope has dual input channels and an external

trigger input channel. Please access signals in the following steps :

① Connect the probe of the digital storage oscilloscope to the

CH1 input terminal, and set the attenuation switch of the probe to

10X (Figure 1-5).

Power switch

Figure 1-4

Warning : To avoid danger, ensure the digital

storage oscilloscope is safely grounded.

Figure 1-5 Setting the attenuation switch of the probe

Function

key

DSO Series User Ma nual

② You have to set the probe attenuation factor of the oscilloscope. ③ Connect the probe tip and ground clamp to the connection terminal

This factor changes the vertical range multiple to ensure the for the probe compensation signal. Press [AUTO] and you will see a

measurement result correctly reflects the amplitude of the signal square wave in the display (1kHz, approximately 3V, peak-to-peak

being tested. Set the attenuation factor of the probe as follows : value) in a few seconds, as shown in Figure 1-7. Use the same method

Press [F ] to show X on the menu.

to check CH2. Press function key [CH1] again to close CH1. Press

function key [CH2] to activate CH2 and repeat steps 2 and 3.

4 10

Figure 1-6 Setting the deflection factor of the oscilloscope probe

Figure 1-7 Probe compensation signal

Probe ration

DSO Series User Ma nual

3. If you see an “Undercompensation” or “Overcompensation”

Probe Compensation

waveform display, adjust the adjustable capacitance tab of the

When connecting the probe to any input channel for the first time,

probe with a screwdriver with non-metal handle, until a “Correct

perform this adjustment to match the probe to the channel. Skipping the

Compensation” waveform shown in the above figure is displayed.

compensation calibration step will result in measurement error or fault.

Please adjust probe compensation as follows :

1. Set the probe attenuation factor to 10X. Move the switch on the

probe to 10X and connect the probe to CH1. When using a hook-

tip, ensure it is well connected to the probe. Connect the probe tip

Automatic Setup for Waveform Display

to the output terminal of the probe compensator's signal

connector, and the ground clamp to the ground cable connector of

Your DSO oscilloscope features an auto setup function. It can

the probe compensator. Activate CH1 then press [AUTO].

automatically adjust the vertical deflection factor, scanning time

base and trigger mode based on the input signal, until the most

2. Observe the displayed waveform.

appropriate waveform is displayed. The auto setup function can only

be operated when the signal to be measured is 20Hz or above and

the duty ratio is larger than 1%.

Using the Aut o Se tu p Fu nc ti on :

1. Connect the signal to be tested to the signal input channel.

2. Press [AUTO]. The oscilloscope will automatically set the vertical

deflection factor, scanning time base and trigger mode.

Overcompensation Correct Compensation Undercompensation

Figure 1-8 Probe compensation calibration

Warning : To avoid electric shock when measuring high

voltage with the probe, ensure the probe's insulation lead is in good condition. Do not touch the metal part of the probe when connected to HV power.

DSO Series User Ma nual

Should you require to make more detailed check, you can adjust 1. Turn the vertical position knob to display the signal in the centre of

manually after the auto setup process until you get the optimal the window. The vertical position knob controls the vertical

waveform display. display position of the signal.

When you turn the vertical position knob, the sign indicating the

Getting to Know the Vertical System

[GROUND] channel will move up and down with the waveform.

As shown in the figure below, there are a group of buttons and knobs in

the vertical control zone. The following exercise will guide you through

vertical setup.

Figure 1-9 Vertical control zone on the front panel

Measurement Tips :

If the channel coupling is DC, you can measure the signal's DC%

quickly by checking the difference between the waveform and

signal ground.

In the case of AC coupling, the DC% within the signal will be

filtered. With this coupling mode you can display the AC% of the

signal with higher sensitivity.

Shortcut key for resetting to zero : [SET TO ZERO]

This shortcut key can reset vertical shift, horizontal shift and holdoff to the zero position (center point), and set the trigger level to 50%.

DSO Series User Ma nual

2. Change the vertical setup and observe changes of status

Getting to Know the Horizontal System

information.

As shown in the figure below, there are one button and two knobs in the

You can identify changes of any vertical range by reading the

horizontal control zone. The following steps will get you familiar with

status display column at the lower corner of the waveform

horizontal time base setup.

window. Turn the vertical SCALE knob to change the vertical

VOLT/DIV range. You will find that the range in the

corresponding channel has changed accordingly. Press [CH1],

[CH2] or [MATH] and the screen will show the corresponding

operation menu, sign, waveform and range status information.

Press the corresponding button for the currently activate channel

again to close the selected channel.

Figure 1-10 Horizontal control zone on the

front panel

DSO Series User Ma nual

1. Use the horizontal SCALE knob to change the horizontal time

base range setup and check any changes in time base range.

Turn the horizontal SCALE knob to change the SEC/DIV time

base range. You will find that the time base range in the current

status column has changed accordingly. Range of horizontal

scanning rate is 2ns~50s, in steps of 1-2-5.

* Note : Horizontal scanning time base range of the DSO

Series varies from model to model.

2. Use the horizontal POSITION knob to adjust the signal's

horizontal position of the waveform window. The horizontal

POSITION knob controls trigger shift of the signal. When this

function is used for trigger shift and the horizontal POSITION

knob is turned, you can see that the waveform moves

horizontally with the knob.

3. Press [HORI MENU] to display the ZOOM menu. In this menu

press [F3] to activate window expansion. Then press [F1] to quit

window expansion and return to the main time base. You can

also set the holdoff time with this menu.

Shortcut key for resetting trigger point displacement to horizontal zero :

The shortcut key [ SET TO ZERO] can quickly reset the trigger point to the vertical centre point. You can also turn the horizontal POSITION knob to adjust the horizontal position of the signal in the waveform window.

Definition

Trigger point means the actual trigger point relative to the centre

point of the storage device. By turning the horizontal POSITION

knob, you can move the trigger point horizontally.

Holdoff means reactivating the time interval of the trigger circuit.

Turn the multifunction control knob to set the holdoff time.

DSO Series User Ma nual

1. Use the trigger level knob to change the trigger level. You will see

Getting to Know the Trigger System

a trigger sign on the screen that indicates the trigger level. The

As shown in Figure 1-11, there is one knob and three buttons in the

sign will move up and down with the knob. While you move the

trigger menu control zone. The following steps will get you familiar with

trigger level, you will find the trigger level value at the bottom of

trigger setup.

the screen changing accordingly.

2. Open the [TRIGGER MENU] (see Figure 1-12) to change trigger

setup.

Press [F1] and select RISING for {TYPE}.

Press [F2] and select CH1 for {TRIGGER SOURCE}.

Press [F3] and set RISING for {SLEW RATE}.

Press [F4] and set AUTO for {TRIGGER MODE}.

Press [F5] and set AC for {TRIGGER COUPLING}.

Figure 1-11 Trigger menu control zone on the front panel

DSO Series User Ma nual

3. Press [SET TO ZERO] to set the trigger level at the vertical centre

point of the trigger signal amplitude.

4. Press [FORCE] to generate a compulsory trigger signal that is

mainly used in the normal and single trigger modes.

Figure 1-12 Trigg er Menu

DSO Series User Ma nual

n Setting the help system ([UTILITY])

Chapter 2 Instrument Setups

n Automatic measurement ([MEASURE])

You should be familiar with basic operation of the vertical controls,

n Cursor measurement ([CURSOR])

horizontal controls and trigger system menu of your DSO Series

oscilloscope by now. After reading the last chapter, you should be

n Using the execution buttons ([AUTO], [RUN/STOP])

able to use the menus to set up your digital storage oscilloscope. If

It is recommended that you read this chapter carefully to understand

you are still unfamiliar with these basic operation steps and methods,

the various measurement functions and system operation steps of your

please read Chapter 1.

DSO Series oscilloscope.

This chapter will guide you through the following :

n Setting the vertical system ([CH1], [CH2], [MATH],

[VERTICAL POSITION], [VERTICAL SCALE])

n Setting the horizontal system ([HORI MENU],

[HORIZONTAL POSITION], [HORIZONTAL SCALE])

n Setting the Trigger system ([TRIGGER LEVEL], [TRIG MENU],

[FORCE])

n Setting the sampling method ([ACQUIRE])

n Setting the display mode ([DISPLAY])

n Storage and recall ([STORAGE])

DSO Series User Ma nual

Setting the Vertical System

CH1, CH2 and setups

Each vertical channel has its own vertical menu. You should set up each

item for each channel individually. Press the [CH ] or [CH ] function

button and the system will display the operation menu for CH1 or

CH2. For explanatory notes please see Table 2-1 opposite:

1 2

Table 2-1：Explanatory notes for channel menu

Function Menu Setup Explanatory Note

Coupling

GND

Intercept the DC quantities of the input signal Pass AC and DC quantities of input signal Disconnect input signal

Limit bandwidth to 20 MH z to reduce noise display Full bandwidth

Open

Clos e

BW Limit

Volts/Div

Coarse

Fine

Coarse tune in steps of 1-2-5 to set up the deflection factor of the vertical system Fine tune means further tuning within the coarse tune setup range to improve the vertical pixel aspect ratio

Select either one value based on the probe attenuation factor to keep the vertical deflection factor reading correct. There are four values : 1x, 10x, 100x and 1000x

1x 10x 100x 1000x

Probe

Invert Open

Waveform invert function on Normal waveform display

DSO Series User Ma nual

Press [F1] to select DC. Both DC and AC quantities of the testing signal

1. Setting the channel coupling :

being inputted to CH1 can pass through. The waveform display is as

Take an example of applying a signal to CH . The signal being

follows :

tested is a sine signal that contains DC quantities.

Press [F1] to select AC. It is now set up as AC coupling. DC quantities of

the signal being tested will be intercepted. The waveform display is as

follows :

Figure 2-1 DC quantities of the signal are intercepted

Figure 2-2 Both DC and AC quantities of the signal are

displayed

AC coupling setup

DC coupling setup

DSO Series User Ma nual

Press [F1] to select GROUND. It is now set up as ground. The display is

2. Setting channel bandwidth suppression :

as follows :

Bandwidth suppression can suppress high frequency quantities over

20MHz or noise in the signal being tested. Application is as follows :

(Note:in this mode, although waveform is not displayed, the

signal remains connected to the channel circuit)

Press [CH1] to turn CH1 on. Then press [F2] to set BANDWIDTH

SUPPRESSION OFF. It is now set up as full bandwidth. The signal

being measured can pass through even if it contains high frequency

quantities. The waveform display is as follows :

Figure 2-3 Screen display in ground mode

Fi gure 2-4 Wav eform di splay wh en

bandwidth suppression is off

Ground coupling setup

Bandwidth suppression off

DSO Series User Ma nual

+ 65 hidden pages

Tenma 72-8710, 72-8705 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual