Uni-Trend UT4000 Series, UT4042C, UT4062C, UT4102C, UT4082C User Manual

File : UTG-005
Date : March 20, 2009
Draft : 1

This product conforms with safety product design requirements of UL and CE standards.

UT4000 Series
Digital Storage Oscilloscope

User Manual

Introduction

Dear valued user,

Thank you for purchasing a Uni-Trend instrument. To use your new product correctly,
read this User Manual carefully and completely before operation and pay particular
attention to “Safety Instructions”.

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 Uni-Trend product or in
an easily accessible place.

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UT4000 User Manual

Copyright Information

z Uni-Trend Technology (Dongguan) Limited. All rights reserved.
z Products of the Company are protected by patents granted and pending in the

People’s Republic of China or other countries.

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

Uni-T all rights reserved. All licensed software products are properties of Uni-Trend
Technology (Dongguan) Limited and its subsidiaries or software providers. They are
protected by the national copyright law and international conventions. Information
contained in this manual supercedes all information in previously published versions.

Uni-T is the registered trademark of Uni-Trend Technology (Dongguan) Limited.

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UT4000 User Manual

If this product is sold or assigned by the original purchaser to a third party within three
years of purchase, the new owner should note that warranty is available for a period of
three years from the day the original purchaser acquired the product from Uni-T or an
authorized dealer. The probe, other accessories and fuses are not covered by warranty.

If any genuine defect is found during the valid warranty period, Uni-T has the option to
repair the defective product without any charge for parts or labor, or replace it with
another product (to be decided by Uni-T). For warranty purposes, Uni-T may use parts,
modules and replacement products that are brand new or repaired to a good-as-new
standard. All old parts, modules and products that are removed during replacement
become properties of Uni-T.

In this User Manual, “customer” means an individual or entity vested with the rights
hereunder. To enjoy the warranty service, the “customer” must report any defect to Uni-T
during the valid warranty period and make appropriate arrangement to allow servicing.
The customer should pack the defective product in a container and deliver it to a
maintenance centre specified by Uni-T. The customer should also prepay all freight cost
and provide a copy of the original sales receipt issued to the original purchaser. If the
product is to be delivered to an address within the country where the maintenance centre
operates, Uni-T shall pay the cost of returning the product to the customer. If the product
is to be delivered any other destination, all freight, custom duty, tax and other costs will
be paid by the customer.

This warranty does not apply to any defect, malfunction or damage caused by accident,
normal wear and tear of mechanical parts, any form of application other than the stated
ones, improper use, improper maintenance or poor maintenance. Under the warranty
terms and conditions, Uni-T has no obligation to provide the following services :
a) Repairing any damage arising from installation, repair or maintenance carried out by

a non Uni-T service representative;

b) Repairing any damage arising from improper use or connection to incompatible

equipment;

c) Repairing any damage or malfunction arising from using a power source not

provided by Uni-T;

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

modification or integration makes repair more time consuming and difficult).

This warranty is made available to this product specifically and supercedes all other
previous warranties, whether express or implied. Uni-T and its dealers will not make any
implied guarantee on the salability or suitability of this product for any specific purpose.
In the event of breach of warranty terms and conditions, repair or replacement of
defective product shall be the only and all remedial measure offered by Uni-T.
Notwithstanding any prior notification of potential damage that is indirect, special,
consequential or inevitable, Uni-T and its dealers shall bear no liability for any such
damage.

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UT4000 User Manual

General Safety Rules

This unit is designed and manufactured strictly in accordance with GB4793 safety
requirements for electronic testing meters and IEC61010-1 safety standards. It fully meets
CAT II 600V insulation and overvoltage requirements and Grade II anti-pollution safety
standards. To prevent personal injuries and damage of this unit or any other devices
connected to it, please take note of the following safety precautions. To avoid potential
hazards, use this unit strictly as instructed by this User Manual.

Maintenance should only be carried out by a trained professional.

To avoid fire and personal injury :
Use a correct power cable : Use only the specified power cable which is authorized in

the country of use.

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

connected to power.

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

To avoid electric shock, the grounding conductor must touch the ground. Before
connecting the input or output terminal, ensure the unit is properly grounded.

Connect the probe of the digital storage oscilloscope : The probe ground cable is the

same as ground potential. Do not connect the ground cable to high voltage.

Check the rated values of all terminals : To prevent fire and excessive current shock,

please check all rated values and label data. Read the manual carefully and check the
rated values before connecting the unit.

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

outer cover or front panel is open.

Use suitable fuses : Only use specified fuse types and rated specifications.

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

or components.

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

maintenance professional to carry out inspection.

Maintain good ventilation.

Do not operate in humid condition.

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UT4000 User Manual

Do not operate in combustible and explosive conditions.

Keep the product surface clean and dry.

Safety Messages and Symbols

Safety terminology used in this manual. The following messages may appear in this
manual :

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.

Messages on the product : The following messages may appear on the product :

“Danger” means potential damage that is immediate.
“Warning” means potential damage that is not immediate.
“Caution” means possible damage to this product or other properties.

Symbols on the product : The following symbols may appear on the product :

High voltage Caution! Refer to manual Protective ground terminal

Ground terminal for chassis Ground terminal for testing

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UT4000 User Manual

Preface

This manual provides information on the operation of the UT4000 digital storage
oscilloscope series. Guidance is given in several chapters as follows :

Chapter 1 ⎯ User Guide : Simple guide to oscilloscope functions and installation.

Chapter 2 ⎯ Instrument Setups : Guide to operation of the UT4000 digital storage

oscilloscope series.

Chapter 3 ⎯ Practical 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 UT4000 Oscilloscopes
Appendix C : Maintenance and Cleaning

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UT4000 User Manual

UT4000 Introduction

UT4000 oscilloscopes offer user-friendliness, outstanding technical indicators and a host
of advanced features. They are your perfect tools to complete testing tasks swiftly and
efficiently. This manual is a user guide for 7 models of this digital storage oscilloscope
series :

Model Bandwidth Single Channel

Sampling Rate
UT4042C 40MHz 2GS/s 1GS/s
UT4062C 60MHz 2GS/s 1GS/s
UT4082C 80MHz 2GS/s 1GS/s
UT4102C 100MHz 2GS/s 1GS/s
UT4152C 150MHz 2GS/s 1GS/s 50GS/s
UT4202C 200MHz 2GS/s 1GS/s 50GS/s
UT4302C 300MHz 2GS/s 1GS/s 50GS/s

Dual Channel

Sampling Rate

Equivalent

Sampling Rate

⎯
⎯
⎯
⎯

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UT4000 User Manual

UT4000 oscilloscopes offer a user-friendly front panel with clear indications to allows
access to all basic functions for easy operation. The scaling and position buttons for all
channels are optimally arranged for direct view operation. As design is based on the
controls of traditional instruments, users can use the new units without spending
considerable time in learning and familiarizing with operation. For faster adjustment to
ease testing, there is an [AUTO] key to instantly display the appropriate waveform and
range position.

The performance features listed below will explain why UT4000 series can fully satisfy
your testing and measurement requirements :

z 2GS/c real-time sampling rate (dual channel 1GS/s, single channel 2GS/s) and

50GS/s equivalent sampling rate (UT4152C/UT4202C/UT4302C)

z Dual time base function; unrivaled waveform detail observation and analysis

capabilities

z 6k storage depth; 60M equivalent storage depth; 1024k recording length
z 16-channel logic analyzer; 3½ digital multimeter
z Unique envelop sampling feature with direct visual display of carrier wave details

after amplitude modulation

z Quick waveform acquisition and colour change function that visually describes the

strength of waveform

z Scroll display in scan mode for continuous monitoring of signal variations
z HD colour LCD system at 320 x 240 pixel aspect ratio
z Unique XY mode that displays the waveform and Lissajous figure concurrently
z USB drive system software upgrade
z Supports plug-and-play USB storage devices and capable of communicating with a

computer through the USB storage device

z Automatic waveform and status configuration
z Storage of waveforms, setup and bit map; waveforms and setups reproduction
z Automatic measurement of 27 waveform parameters; parameters testing and

customization

z Automatic cursor tracing measurement
z Unique wave recording and replay function
z Built-in FFT
z Multiple waveform mathematics functions (including add, subtract, multiply and

divide)

z Edge, video, pulse width, slew rate and alternate trigger functions
z Visual system help messages

UT4000 accessories :

z 2 x 1.5m, 1:1/10:1 probe. For details refer to the probe instructions. These

accessories conform with EN61010-031: 2002 standards

z Power line conforming to international standards applicable in the country of use
z User Manual
z Product Warranty Card
z USB connecting cable : UT-D04
z UT4000 communication control software (USB-DEVICE)
z 2 x multimeter pen; 2 x current-to-voltage converter module; UT-M03/UT-M04
z UT4000 logic analyzer probe (including clamps and cable, flex cable) : UT-P06

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UT4000 User Manual

Table of Contents

Item

General Safety Rules
Preface
Chapter 1 User Guide 1
General Inspection 5
Functional Check 5
Probe Compensation 8
Automatic Setups for Waveform Display 8
Getting to Know the Vertical System 9
Getting to Know the Horizontal System 10
Getting to Know the Trigger System 12
Chapter 2 Instrument Setups 14
Setting Up the Vertical System 15
Setting Up the Horizontal System 24
Setting Up the Trigger System 27
Setting Up the Sampling System 34

Setting Up the Display System 37

Storage and Recall 39
Setting Up Utility Functions 41
Automatic Measurement 44
Cursor Measurement 47
Using the Run Button 48
Logic Analyzer (LA) Measurement 49
Multimeter Measurement 51
Chapter 3 Practical Example Illustrations 54

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Item

Illustration 1 : Measuring simple signals 52
Illustration 2 : Observing the delay caused by a

Illustration 3 : Acquiring single signals 54
Illustration 4 : Reducing random noise of signals 55
Illustration 5 : Using cursors for measurement 56
Illustration 6 : Using the X-Y function 57
Illustration 7 : Video signal triggering 59
Illustration 8 : Pass/fail check 61
Illustration 9 : Quick acquisition 62
Illustration 10: Using the dual time base function 62
Illustration 11: Using the Logic Anaylzer 63
Illustration 12: Using the multimeter 64
Chapter 4 System Prompts and Trouble-shooting 65
Definitions of System Prompts 65
Troubleshooting 65
Chapter 5 Service and Support 67
Warranty 67
Using the USB Upgrade Program 67
Contact Us 74
Chapter 6 Technical Indicators 75

Appendix A : Technical indicators 75

Appendix B : Accessories for UT4000 Oscilloscopes 81
Appendix C : Maintenance and Cleaning 81
Index 83

sine wave signal passes through the circuit

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Chapter 1 ⎯ User Guide

UT4000 Series digital storage oscilloscopes are small and compact portable devices. The
user-friendly front panel enables easy operation for basic testing and measuring tasks.

This chapter provides notes on the following :

U General inspection
U Functional check
U Probe compensation
U Automatic setups for waveform display
U Getting to know the vertical system
U Getting to know the horizontal system
U Getting to know the trigger system

When beginning to use your UT4000 oscilloscope, first familiarize yourself with the
operation front panel. This chapter briefly describes the operation and functions of the
front panel, so you can get started with your UT4000 series digital storage oscilloscope as
quickly as possible.

Your UT4000 oscilloscope comes with a front panel with at-a-glance functions for easy
operation. There are buttons and function keys on the front panel. The functions of knobs
are similar to other oscilloscopes. The row of 5 keys on the right of the display panel are
menu operation keys (designated as [F1] to [F5] from top 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 different function menus or access particular functions directly.

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Figure 1-1 Front panel of UT4000 Oscilloscopes

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Figure 1-2 Schematic diagram for operating the UT4000 front panel

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Figure 1-3 Schematic diagram for the display interface

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General Inspection

We suggest checking your new UT4000 oscilloscope in the following steps.

1. Check the unit for possible shipping damages

If the package carton or foam plastic protective lining is seriously damaged, do not
discard until you have carried out an electrical and mechanical check and found the
product and accessories performing satisfactorily.

2. Check the accessories

A checklist of accessories that come with your UT4000 oscilloscope is provided in the
section “UT4000 Accessories” of this user manual. Please check for any missing items
against this list.
If any item is missing or damaged, please contact your UNI-T 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 UNI-T dealer or our local office.

Functional Check

Carry out a quick functional check in the following steps to make sure your oscilloscope
is operating normally.

1. Power on the unit

Power on the unit. Power supply voltage is 100-240V AC, 45-440Hz. After connecting to
power, start the self calibration process by pressing the [UTILITY] button (utility
function) once and [F1] twice. Then press [SELECT] to run.

To go to the next page press [UTILITY], [F1], THEN [F5]. To run the factory default
setup, press[F1] then [SELECT], as shown in Figure 1-4.

When the above procedure is complete, press [CH1] to enter the CH1 menu.

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UTILITY button

Figure 1-4

Warning : To avoid danger, ensure the digital storage oscilloscope is safely grounded.

2. Accessing signals

Your UT4000 oscilloscope has dual input channels and one external trigger input channel.
Please access signals in the following steps :

c Connect the probe of the digital storage oscilloscope to the CH1 input, and set the
attenuation switch of the probe to 10X (Figure 1-5).

Figure 1-5 Setting the attenuation switch

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d You have to set the probe attenuation factor of the oscilloscope. This factor changes the
vertical range multiple to ensure the measurement result correctly reflects the amplitude
of the signal being tested. Set the attenuation factor of the probe as follows : Press [F4]
then [F2] to display 10X on the menu.

Probe ration

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

e Connect the probe tip and ground clamp to the corresponding probe compensation
signal terminals. Press [AUTO] and you will see a square wave in the display (about 3V
peak-to-peak at 1kHz) in a few seconds, as shown in Figure 1-7.

4 Repeat these steps to check CH2. Press the [OFF] function button to close CH1, then
press [CH2] function button to open CH2. Repeat steps 2 and 3.

Figure 1-7 Probe compensation signal

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Probe Compensation

When connecting the probe to any input channel for the first time, perform this
adjustment to match the probe to the channel. Skipping the compensation calibration step
will result in measurement error or fault. Please adjust probe compensation as follows :

1. In the CH1 menu set the probe to 10X. Move the switch on the probe to 10X and
connect the probe to CH1. Connect the probe tip to the probe compensator’s signal
output connector, then connect the ground clamp to the ground wire connector of
the probe compensator. Display CH1 and press [AUTO].

2. Observe the shape of the displayed waveform.

Overcompensation Correct Compensation Undercompensation

Figure 1-8 Probe compensation calibration

3. If you see an “Undercompensation” or “Overcompensation” waveform display,
adjust the adjustable tab inside the adjustment hole at the tip of the probe with the
adjusting rod in the probe accessory pack, until a “Correct Compensation”
waveform shown in Figure 1-8 is displayed.

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.

Automatic Setups for Waveform Display

Your UT4000 oscilloscope features an autoset function. It can automatically adjust the
vertical deflection factor, scanning time base and trigger mode based on the input signal,
until the most appropriate waveform is displayed. The autoset function can only be
operated when the signal to be measured is 50Hz or above and the duty ratio is larger than
1%.

Using the Autoset Function :

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. Should you require to make more detailed
check, you can adjust manually after the autoset process until you get the optimal
waveform display.

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Getting to Know the Vertical System

As shown in the figure below, there are a series of buttons and knobs in the vertical
control zone. The following steps will get you familiar with the use of these controls.

Figure 1-9 Vertical controls

1. Turn the vertical position knob [POSITION]

signal in the centre of the window. The vertical position knob controls the vertical
display position of the signal. When you turn the vertical position knob, the sign
indicating vertical reference of the [GROUND] channel will move up and down with
the waveform.

Measurement Tips

If the channel coupling is DC, you can test the signal’s DC% quickly
the difference between the waveform and signal ground.
In the case of AC coupling, the DC% within the signal will be intercepted. In this
coupling mode you can display the AC% of the signal with higher sensitivity.

Shortcut key for resetting the vertical
zero [SET TO ZERO]

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

to enable the waveform to display the

y checking

osition of the dual analog channel to

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2. Change the vertical setups and check changes of status information. You can
identify changes of any vertical range by reading the status display column at the
lower corner of the waveform window. Turn the vertical VOLTS/DIV
change the vertical VOLT/DIV range. You will find that the range in the current
status column changes accordingly. Press [CH1], [CH2], [MATH] or [REF] and the
screen will show the operation menu, icon, waveform and range status information
of the corresponding channel. Press [OFF] to close the selected channel.

knob to

Getting to Know the Horizontal System

Horizontal controls are shown in the figure below. The following steps will get you
familiar with horizontal time base setups.

Figure 1-10 Horizontal controls

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1. Use the horizontal SEC/DIV knob to change the horizontal time base setup. Turn
the horizontal SEC/DIV
find that the time base range in the current status column of the corresponding
channel changes accordingly. Range of horizontal scanning rate is 5ns~50s/div
(UT4102C), in steps of 1-2-5.

* Note : Minimum time base range of the UT4000 Series varies from model to

model.

2. Use the horizontal [POSITION]

in the waveform window. When the horizontal POSITION
see that the waveform moves horizontally with the knob.

3. Press [MENU] to display the ZOOM and dual time base menu. In this menu press

[F1] to activate window expansion. Then press [F1] again to quit window expansion
and return to the main window. To access dual time base setup, press [F3]. You can
also set the holdoff time with the multifunction control knob [¯].

Shortcut key for resetting the trigger point shift to horizontal zero position
When trigger point has moved from the horizontal centre point considerably by way
of horizontal shift, pressing the shortcut key [SET TO ZERO] can quickly reset the
trigger point to the vertical centre point. You can also turn the knob to make
adjustments.

Definition
Trigger point means the actual trigger point relative to the centre point of the

storage device. When it is at the horizontal centre point, it is also at the centre point
of the storage device. By turning the horizontal knob, you can move the trigger
point horizontally.

Holdoff means the time interval until the trigger circuit is next reactivated. Turn the

multifunction control knob to set the holdoff time. By adjusting the holdoff time,
you can observe combination or complex signals more effectively.

knob to change the SEC/DIV time base range. You will

knob to adjust the horizontal position of the signal

knob is turned, you can

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Getting to Know the Trigger System

Trigger controls are shown in the figure below. The following steps will get you familiar
with trigger setups.

Figure 1-11 Trigger controls

1. Use the trigger level knob to change the trigger level. The trigger level line on the

screen will move up and down with the knob. While you move the trigger level, you
will find the trigger level value at the bottom of the screen changing accordingly.

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

setups are as follows :
Press [F1] twice to select the edge as [TRIGGER TYPE].
Press [F2] to select CH1 as [TRIGGER SOURCE] (Select with the multifunction

control knob then press [SELECT] to confirm).
Press [F3] then [F1] to set [TRIGGER COUPLING] as DC.
Press [F4] then [F1] to set [TRIGGER MODE] as AUTO.
Press [F5] to set [EDGE TYPE] as RISING.

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Figure 1-12 Trigger menu

3. Press the [50%] button and 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.

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Chapter 2 ⎯ Instrument Setups

You should be familiar with basic operation of the vertical controls, horizontal controls
and trigger system menu of your UT4000 oscilloscope by now. After reading the last
chapter, you should be able to use the menus to set up your digital storage oscilloscope. If
you are still unfamiliar with these basic operation steps and methods, please read Chapter

1.

This chapter will guide you through the following :

 Setting up the vertical system ([CH1], [CH2], [MATH], [REF], [OFF], [VERTICAL

POSITION], [VOLTS/DIV])

 Setting up the horizontal system ([MENU], [HORIZONTAL POSITION

[SEC/DIV

 Setting up the trigger system ([TRIGGER LEVEL
 Setting up the sampling method ([ACQUIRE])
 Setting up the display mode ([DISPLAY])
 Save and transfer ([STORAGE])
 Setting up the utility function ([UTILITY])
 Automatic measurement ([MEASURE])
 Cursor measurement ([CURSOR])
 Using the auto setup, run/stop buttons ([AUTO], [RUN/STOP])
 Logic analyzer [LA]
 Digital multimeter [DMM]

It is recommended that you read this chapter carefully to understand the various
measurement functions and system operation steps of your UT4000 Series Oscilloscope.

]

], [MENU], [50%], [FORCE])

],

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Setting Up the Vertical System

CH1, CH2 and setups

Each channel has its own vertical menu. You should set up each item for each channel
individually. Press the [CH1] or [CH2] function button and the system will display the
operation menu for CH1 or CH2. For explanatory notes please see Table 2-1 below :

Table 2-1 Explanatory notes for channel menu

Function Menu Setup Explanatory Note

Coupling DC

AC

Ground

Bandwidth limit Full bandwidth

20MHz

VOLTS/DIV Coarse tune

Fine tune

Probe 1X

10X
100X
1000X

Invert On

Off

AC and DC quantities of input signal is allowed
to pass.
DC quantities of the input signal are intercepted.
DC level of the channel input terminal upon
equivalent grounding is displayed.
Full bandwidth.
Limit bandwidth to 20MHz to reduce noise
display.
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 one of the values based on the probe
attenuation factor to keep the vertical deflection
factor reading correct. There are four values :
1X, 10X, 100X and 1000X.
Waveform invert function on.
Normal waveform display.

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1. Setting up channel coupling

Take the example of applying a signal to CH1. The signal being tested is a sine signal that
contains DC %.

Press [F1] then [F2] 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 :

AC coupling setup

Figure 2-1 DC quantities of the signal are intercepted

Press [F1] twice to select DC. Both DC and AC quantities of the testing signal being
inputted to CH1 can pass through. The waveform display is as follows :

DC coupling setup

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

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Press [F1] then [F3] to select ground. It is now set up as ground. The waveform display is
as follows :

(Note : In this mode, although waveform is not displayed, the signal remains
connected to the channel circuit)

Ground coupling setup

Figure 2-3 Screen display for the

ground mode

2. Setting up the channel bandwidth

Take the example of applying a signal to CH1. The signal being tested is a signal stacked
with high frequency quantities.

Press [CH1] to turn CH1 on. Next press [F2] then [F1] to set channel bandwidth to full
bandwidth. The signal being measured can pass through even if it contains high frequency
quantities. The waveform display is as follows :

Full bandwidth

Figure 2-4 Waveform display at full bandwidth

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Press [F2] then [F3]. All high frequency quantities higher than 20MHz in the signal being
tested will be limited. The waveform display is as follows :

Bandwidth limit 20MHZ

Bandwidth limit icon

Figure 2-5 Waveform display when bandwidth limit is on

3. Setting up the probe rate

To match the probe attenuation factor setup, it is necessary to set up the probe attenuation
factor in the channel operation menu accordingly. For example, when the probe
attenuation factor is 10:1, set the probe attenuation factor at 10X in the menu. Apply this
principle to other values to ensure the voltage reading is correct.

The figure below shows the setup and vertical range display when the probe is set at 10:1.

Probe attenuation factor

Vertical range movement

Figure 2-6 Setting up the probe attenuation factor in the channel menu

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4. Vertical VOLTS/DIV adjustment setup

You can adjust the VOLTS/DIV range of the vertical deflection factor either in the coarse
tune mode or fine tune mode. In coarse tune mode, the VOLTS/DIV range is
1mV/div~10V/div. Tuning is in steps of 1-2-5. In fine tune mode, you can change the
deflection factor in even smaller steps within the current vertical range, so as to
continuously adjust the vertical deflection factor within the range of 1mV/div~10V/div
without interruption.

Fine tune setup

Figure 2-7 Coarse tuning and fine tuning the vertical deflection factor

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