RS ISR-6051 User manual

Instruction Manual
ISR-6051
Dual Channel Oscilloscope
EN

i
Dual Channel Oscilloscope
ISR-6051
OperationManual
© 2016 RS Components Ltd.
Thismanual containsproprietaryinformation,which isprotected bycopyrights.
All rights arereserved.No part of this manual may be photocopied,reproduced
or translated into another language without prior written consent of RS
Components.
The information in this manual was correct at the time of printing. Due to
product improvements, RS Components reserves the rights to change
specification, equipment, and maintenance procedures at any time without
notice.
82SR-60510MC1

ISR-6051 OSCILLOSCOPE
USER MANUAL

CONTENTS PAGE
1.PRODUCTINTRODUCTION .................................................................. 1
1-1. DESCRIPTION............................................................................................. 1
1-2. FEATURES .................................................................................................2
2.TECHNICAL SPECIFICATIONS............................................................ 4
3.PRECAUTIONSBEFOREOPERATION.............................................. 7
3-1. UNPACKING THEOSCILLOSCOPE.............................................................. 7
3-2. CHECKINGTHESUPPLYVOLTAGE............................................................ 7
3-3. ENVIRONMENT.......................................................................................... 8
3-4. EQUIPMENTINSTALLATION AND OPERATION.......................................... 8
3-5. CRT INTENSITY......................................................................................... 8
3-6. MAXIMUMWITHSTANDVOLTAGEOFINPUTTERMINALS........................ 8
4.FRONTAND REARPANELS................................................................... 9
4-1. FRONTPANEL..........................................................................................11
4-2. REARPANEL........................................................................................... 26
5.OPERATION............................................................................................... 28
5-1. READOUTDISPLAY ................................................................................. 28
5-2. CONNECTING INPUTSIGNALS.................................................................30
5-3.ADJUSTMENTSANDCHECKS...................................................................31
5-4. FUNCTION CHECK................................................................................... 33
5-5. BASICOPERATION...................................................................................36
5-6. MEASUREMENTAPPLICATIONS..............................................................45
6.MAINTENENCE........................................................................................ 47
6-1. FUSEREPLACEMENT .............................................................................. 47
6-2. LINEVOLTAGECONVERSION..................................................................47
6-3. CLEANING............................................................................................... 48
7.BLOCKDIAGRAM...................................................................................49
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ISR-6051 OSCILLOSCOPE
USER MANUAL

SAFETY TERMS AND SYMBOLS
Theseterms mayappearin thismanualorontheproduct:
WARNING.Warningstatementsidentifyconditionsorpractices
thatcould result ininjuryorloss oflife.
CAUTION. Caution statements identify conditions or practices
thatcould result in damagetothis productorother property.
Measurement category I is for measurements performed on circuits not directly
connectedtothe lowvoltageinstallation.
Measurement category IIis for measurements performed on circuits directly connected
to thelowvoltage installation.
Measurement categoryIIIisformeasurementsperformed inthebuildinginstallation.
Measurement category IV is for measurements performed at the source of the
low-voltage installation.
Thefollowingsymbols mayappearinthismanualorontheproduct:
DANGER ATTENTION Protective Earth(ground)
HighVoltage refertoManual Conductor Terminal
Terminal
ii

ISR-6051 OSCILLOSCOPE
USER MANUAL

FORUNITEDKINGDOM ONLY
NOTE:Thislead/appliance mustonly bewired by competentpersons
WARNING:THIS APPLIANCE MUSTBEEARTHED
IMPORTANT: Thewiresinthisleadarecoloured inaccordancewith
thefollowingcode:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in main leads may not correspond with the
colourmarkingsidentified inyourplug/appliance, proceedasfollows:
The wire which is coloured Green & Yellow must be connected to the
Earth terminal marked with the letter E or by the earth symbol or
colouredGreenorGreen &Yellow.
The wire which is coloured Blue must be connected to the terminal which
is markedwiththe letter Norcoloured BlueorBlack.
The wire which is coloured Brown must be connected to the terminal
marked with the letter LorP orcoloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or
contactthesupplier.
iii

ISR-6051 OSCILLOSCOPE
USER MANUAL

This cable/appliance should be protected by a suitably rated and
approved HBC mains fuse: refer to the rating information on the
equipment and/or user instructions for details. As a guide, cable of
0.75mm2should be protected by a 3A or 5A fuse. Larger conductors
would normally require 13A types, depending on the connection method
used.
Any moulded mains connector that requires removal /replacement must
be destroyed by removal of any fuse & fuse carrier and disposed of
immediately, as a plug with bared wires is hazardous if a engaged in live
socket. Any re-wiring must be carried out in accordance with the
information detailedonthis labelandlocalregulations.
iv

ISR-6051 OSCILLOSCOPE
USER MANUAL
1
1. PRODUCT INTRODUCTION
1-1. Description
The ISR-6051 oscilloscope is a 50 MHz, two-channel, portable
oscilloscopes for general purpose use. A microprocessor-based operating
system controls most of the functions of the instrument, including cursor
readout and digitized panel setting. On-screen alphanumeric readout and
cursor functions for voltage, time and frequency measurement provide
operational convenience. It also has the function of auto measurement for
frequency and counter. Ten different user defined instrument settings can be
saved and recalled.
The vertical deflection system has two input channels. Each channel has 14
basic deflection settings from 1mV to 20V per division. The horizontal
deflection system provides sweep times from 0.5s to 0.2μs per division.
The trigger system provides stable triggering over the full bandwidth of the
vertical deflection system.

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USER MANUAL
2
1-2. Features
The oscilloscope offers several additional features:
1) High intensity and internal graticule CRT;
The oscilloscope employs a high intensity 6-inch rectangular screen
cathode-ray tube with red internal graticule. It displays clear readable
traces even at high sweep speeds. Internal graticule lines eliminate
parallax-viewing error between the trace and the graticule line.
2) Frequency counter:
An in-built 6-digit frequency counter is accurate to ±0.01% when
measuring frequencies between 1kHz to 50MHz and ±0.05% when
measuring 50Hz to 1kHz.
3) ALT-MAG function:
The primary sweep waveform together with the magnified sweep
waveform can be displayed simultaneously using the ALT-MAG
function. The magnification ratio can be selected from three levels of ×
5, ×10 or ×20 to allow detailed inspection of the displayed waveform in
the centre of the CRT.
4) Convenient VERT-MODE triggering:
The sync signal source is determined automatically when the vertical
axis mode is changed, thereby removing the need to change the trigger
source every time the VERT-MODE is changed.
5) TV triggering:
A TV sync-separator circuit permits stable TV signal measurements on
field, frame and line signals.
6) Hold-off:
The function allows the stable synchronization of complex waveforms
that are difficult to synchronize by adjusting the trigger level alone.

ISR-6051 OSCILLOSCOPE
USER MANUAL
3
7) CH1 Signal output:
The CH1 signal output is obtained by splitting the input signal in the
middle of the signal line. As the connector provides the input signal at a
level of 50mV/div, connecting a frequency counter makes it possible to
measure the frequency of a very low-level signal while observing its
waveform.
8) Z-axis intensity modulation:
For applying a blanking signal from an external source. The trace
displayed on the screen may be intensity-modulated where pulse signal
or time-scale marks are required.
9) LED indicator and buzzer alarm:
The LED’s located in the front panel assist operation and indicate
additional information. Incorrect operation and the electrical
end-of-travel of control knobs are indicated by a warning beep.
10) SMD manufacturing technology:
The instrument is built using advanced SMD technology to reduce the
amount of internal wiring and shorten the foil route on the printed
circuit boards. This increases the high frequency performance and the
reliability of the product.
11) Compact size (275W×130H×370D)mm and logically grouped front panel
controls provide ease of use.

ISR-6051 OSCILLOSCOPE
USER MANUAL
4
2. TECHNICAL SPECIFICATIONS
CRT
Type
6-inch rectangular type with internal graticule;
0%, 10%, 90% and 100% markers.
8 x10 DIV (1 DIV = 1 cm)
Accelerating potential
Approx. 10kV
INTEN and FOCUS
Front panel control.
Illumination
Provided
Trace rotation
Provided.
Z-axis Input
Sensitivity: at least 5V
Polarity : positive going input decrease intensity
Usable frequency range: DC to 2MHz.
Max. input voltage: 30V (DC +AC peak) at 1kHz
or less.
Input impedance: approx. 33kΩ
VERTICAL
SYSTEM
Sensitivity accuracy
1mV~2mV/DIV ±5%, 5mV~20V/DIV ±3%, 14
calibrated steps in 1-2-5 sequence.
Vernier vertical
sensitivity
Continuously variable to 1/2.5 or less of panel
indicated value.
Bandwidth(-3dB) and
rise time
Bandwidth(-3dB)
Rise time
5mV~20V/DIV
DC~50MHz
Approx. 7ns
1mV~2mV/DIV
DC~7MHz
Approx. 50ns
Maximum input
voltage
400V (DC + AC peak) at 1kHz or less.
Input coupling
AC, DC, GND
Input impedance
Approx. 1MΩ±2% // approx. 25pF
Vertical modes
CH1, CH2, DUAL (CHOP/ALT), ADD, CH2
INV.
CHOP frequency
Approx. 250kHz.
Dynamic range
6DIV at 50MHz,
HORIZONTAL
SYSTEM
Sweep time
0.2μs/DIV~0.5s/div, 20 steps selectable in 1-2-5
sequence, continuous variable control between
steps at least 1:2.5.
Accuracy
±3%, ±5% at ×5 and ×10 MAG, ±8% at ×20 MAG
Sweep magnification
×5, ×10, ×20 MAG
Maximum sweep time
(at MAG)
20ns/DIV (10ns/DIV uncalibrated)
ALT-MAG function
Available.

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5
TRIGGER
SYSTEM
Trigger modes
AUTO, NORM, TV
Trigger source
VERT-MODE, CH1, CH2, LINE, EXT.
Trigger coupling
AC, HFR, LFR, TV-V(-), TV-H(-).
Trigger slope
“+” or “- ” polarity.
Trigger sensitivity
CH1,
CH2
VERT-
MODE
EXT
20Hz~5MHz
0.5 DIV
2.0 DIV
200mV
5MHz~40MHz
1.5 DIV
3.0 DIV
800mV
40MHz~50MHz
2.0 DIV
3.5 DIV
1V
TV sync pulse more than 1 DIV (CH1, CH2,
VERT-MODE) or 200mV (EXT).
External trigger
input
Input impedance: Approx. 1MΩ//25pF
(AC coupling)
Max. input voltage: 400V
(DC + AC peak) at 1kHz.
Hold-off time
Variable.
X-Y OPERATION
Input
X-axis : CH1, Y-axis : CH2
Sensitivity
1mV/DIV~20V/DIV.
Bandwidth
X-axis: DC~500kHz (-3dB)
Phase difference
3°or less from DC to 50kHz
OUTPUT
SIGNAL
CH1 signal output
Voltage: approx. 20mV/DIV (with 50Ω
termination)
Bandwidth: 50Hz to at least 5MHz.
Calibrator output
Voltage: 0.5V±3%,
Frequency: approx. 1kHz, square wave.
CRT
READOUT
Panel setting display
CH1/CH2 sensitivity, sweep time, trigger
condition
Panel setting save &
recall
10 sets
Cursor measurement
Cursor measurement function: ΔV, ΔT, 1/ΔT.
Cursor resolution: 1/25 DIV.
Effective cursor range: Vertical:±3 DIV,
Horizontal: ±4DIV
Frequency counter
Display digits: Max. 6-digits decimal.
Frequency Range: 50Hz~50MHz
Accuracy: ±0.05%: 50Hz~1kHz.
±0.01%: 1kHz~50MHz.
Measuring sensitivity: The satisfied value of the
above-mentioned trigger sensitivity plus 1 DIV.
(measuring source selected from CH1 or CH2 as
synchronizing signal source).

ISR-6051 OSCILLOSCOPE
USER MANUAL
6
LINE POWER
REQUIREMENT
Voltage
AC100V, 120V, 230V ±10% selectable.
Frequency
50Hz or 60Hz.
Power Consumption
Approx. 60VA, 50W(max).
MECHANICAL
SPEC.
Dimensions
275(W)×130(H)×370(D) mm.
Weights
8 kg
OPERATING
ENVIRONMENT
Indoor use
Altitude up to 2000 m
Ambient temperature :
To satisfy specifications : 10℃to 35℃( 50F to 95F )
Maximum operating ranges: 0℃to 40℃( 32F to 104F )
Relative humidity: 85% RH(max.) non-condensing
Installation Category : II 300V
Pollution degree 2
STORAGE
TEMPERATURE
& HUMIDITY
-10to 70℃, 70%RH(maximum)
ACCESSORIES
Power cord….............……1
Instruction manual………..1
Probe (×1/×10)…………....2

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7
3. PRECAUTIONS BEFORE OPERATION
3-1. Unpacking the oscilloscope
The product has been inspected and tested before shipment from the factory.
Upon receiving the instrument, please unpack and inspect it to check for any
damage caused during transportation. If any sign of damage is found, notify
the bearer and/or the supplier immediately.
3-2. Checking the supply voltage
The oscilloscope can be powered by any supply voltage listed in the table
below. Before connecting the power plug to an AC supply, ensure the voltage
selector on the rear panel is set to the correct position corresponding to the
supply voltage. The instrument may be damaged if connected to an incorrect
supply voltage.
WARNING. To avoid electrical shock the power cord protective
ground conductor must be connected to ground.
When supply voltages are changed, replace the fuses with the as shown as below:
Line
voltage
Range
Fuse
Line voltage
Range
Fuse
100V
120V
90-110V
108-132V
T 1A 250V
230V
207-250V
T 0.4A 250V
WARNING. To avoid the risk of electric shock, disconnect the power
cord before removing the fuse holder.

ISR-6051 OSCILLOSCOPE
USER MANUAL
8
3-3. Environment
The normal operating ambient temperature range of this instrument is from
0to 40C (32to 104F). Operation outside this temperature range may
cause damage to the instrument.
Do not use the instrument where strong magnetic or electric fields exist, as it
may disturb the operation and measurement. Do not use the instrument in a
place where it is subject to direct sunlight.
3-4. Equipment installation and operation
Ensure there is proper ventilation for the vents in the oscilloscope case.
If this equipment is used in a manner not specified in these instructions, the
protection afforded by the equipment may be impaired.
3-5. CRT intensity
To prevent permanent damage to the CRT phosphor, do not make the CRT
trace excessively bright or leave the spot in the same place on the screen for
a long time.
3-6. Maximum withstand voltage of input terminals
The maximum input voltages which can be applied to the instrument input
terminals and probe input terminals are shown in the following table. Do not
apply voltages higher than these limits.
Input terminal
Maximum input voltage
CH1, CH2, inputs
400V (DC + AC peak)
EXT TRIG input
400V (DC + AC peak)
Probe inputs
600V (DC + AC peak)
Z AXIS input
30V (DC + AC peak)
CAUTION. To avoid damaging the instrument, do not apply
input voltages at a frequency above 1 kHz to the instrument.

ISR-6051 OSCILLOSCOPE
USER MANUAL
9
4. FRONT AND REAR PANELS
When the instrument is switched on, all significant settings are displayed on
the CRT screen. The LED’s located on the front panel assist operation and
indicate additional information. Incorrect operation and the electrical end
position of control knobs is indicated by a warning beep.
All of the buttons, the VOLTS/DIV and TIME/DIV control knobs have
electronic operation and their functions and settings can be stored in the
internal memories.
The front panel is subdivided into four sections as follows:
Display controls
Vertical controls
Horizontal controls
Trigger controls

ISR-6051 OSCILLOSCOPE
USER MANUAL
10 
Front panel





 




 Ω


























Ω

 

 


µ
Ω















  











 


 
 













ISR-6051 OSCILLOSCOPE
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11 
4-1. Front panel
Display controls
The display controls adjust the on-screen appearance of the waveform and
provide a probe compensation signal source.
(1) POWER –Button
When the oscilloscope is first switched on, all LEDs light as the
instrument carries out a self-test routine. After a few seconds, most
LEDs will extinguish and the instrument will enter normal operation
mode. The instrument will revert to its last used state.
(2) TRACE ROTATION
The TRACE ROTATION allows alignment of the horizontal trace
parallel with the graticule lines. Use a small screwdriver to adjust this
potentiometer.
10
1
2
3
4
5
6
7
8
9











  




 


 
 

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12 
(3) INTEN—Control knob
This control knob is used for adjusting the intensity of the traces. Turn the
knob clockwise to increase the intensity and turn it anti-clockwise to
decrease the intensity.
(4) FOCUS
This control knob allows the trace and other information on the CRT to be
focussed for best resolution. Turn the knob clockwise or anti-clockwise to
obtain the sharpest image.
(5) CAL
The terminal provides a square-wave reference signal of 0.5Vp-p at 1kHz
for probe adjustment.
(6) Ground Socket—Banana socket galvanically connected to safety and
chassis earth
This socket can be used as a reference potential connection for DC and low
frequency signal measurement purposes.
(7) TEXT/ILLUM—Double function control knob.
This button is for alternately selecting the text readout intensity function
or scale illumination function. Either “TEXT” or “ILLUM” will appear on
the CRT.
The TEXT/ILLUM function can be adjusted with the VARIABLE(9)
control knob. Turn the knob clockwise to increase the text intensity or
scale illumination, or turn the knob anti-clockwise to decrease it. Press the
knob to switch the TEXT/ILLUM on or off.
(8) CURSORS MEASUREMENT FUNCTION
Two button and the VARIABLE(9) control knob are used to select and
adjust the cursors and their positions on the CRT screen.
△V—△T—1/△T—OFF Button
When the button is pressed, the three measurement functions will be
selected in the sequence as follows:

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13 
△V: Two horizontal cursors appear. The voltage between the two cursors
is calculated according to the setting of VOLTS/DIV, and displayed
with △V at the top of the CRT.
△T: Two vertical cursors appear. The time difference between the two
cursors is calculated according to the setting of TIME/DIV, and
displayed with △T at the top of the CRT.
1/△T: Two vertical cursors appear. The reciprocal of the time difference
(frequency) between the two cursors is calculated and displayed
with 1/△T at the top of the CRT.
C1—C2—TRK Button
Cursor 1, cursor 2 and tracking can be selected. Press the button to select the
functions in the following sequence:
C1: Moves cursor 1 on the CRT(▼or ►symbol is displayed)
C2: Moves cursor 2 on the CRT(▼or ►symbol is displayed)
TRK: Simultaneously moves both cursor 1 and cursor 2 with the interval
between the two cursors unchanged (both symbols are displayed
above the two cursors.)
(9) VARIABLE—
Turn or press the VARIABLE knob to set the cursor position,
TEXT/ILLUM level etc.
In cursor mode, press the VARIABLE control knob to select the cursor
position between FINE and COARSE adjustment mode. When FINE
adjustment is selected, the cursor lines will move slowly when turning
the VARIABLE control. Conversely, if COARSE adjustment mode is
selected, the cursor will move fast.
In TEXT/ILLUM mode, this control knob can be used to set the text
intensity or illumination. Please refer to TXT/ILLUM (7) for details.

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USER MANUAL
14 
(10) ◄MEMO- 9►—SAVE/RECALL
The instrument contains 10 non-volatile memories which can be used to
save instrument setting and to recall them. The memories will store all
controls settings that are electronically selected.
Press the ◄or ►button to select the required memory location. The
display then indicates the letter “M” followed by a digit between 0 and 9.
Each time the button ►is momentarily pressed, the memory location
digit increases until the number 9 is reached. The ◄button operates in a
similar manner, but decreases the memory location digit until the number
0 is reached.
Press and hold SAVE for approx. 3 seconds to write the instrument
settings into the selected memory location and indicate the associated
readout information with “ ”.
To recall a front panel setup, select a memory location as described above.
Recall the settings by pressing and holding the RECALL button for
approx. 3 seconds. The readout then indicates the associated readout
information with “ ”.