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50130 MHz DIGITAL STORAGE
OSCILLOSCOPE
GRS-605216032
User Manual
Good Will Instrument Co., Ltd.
GW Part No. 82RS-60520MA
Printed in Taiwan May 2002
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All Rights Reserved
This manual contains proprietary information, which is protected by copyrights. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 95-1 1, Pao-Chung Road, Hsin-Tien City, Taipei Hsien, Taiwan
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Declaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
No. 95-11, Pao-Chung Rd., Hsin-Tien City, Taipei Hsien, Taiwan declares that the below mentioned product
GRS-6052, GRS-6032 are herewith confirmed to comply with the requirements set out in the Council Directive on the Approximation of the Law of Member States relating to Electromagnetic
Compatibility (89/366/EEC, 92131/EEC, 93168EEC) and Low Voltage Equipment
Directive (73123lEEC).
For the evaluation ,regarding the Electromagnetic Compatibility and Low Voltage
Equipment Directive, the following standards were applied:
EN
61326-1:
Electrical equipment for measurement, control and laboratory use
EMC requirements
(1997+A1: 1998)
Conducted and Radiated Emission
I
Electrostatic Discharge
EN 5501 1 : 1998 Group I class B
Current Harmonic
I
EN 61000-4-2: 1995
I
Radiated Immunity
EN 61000-3-2: 2000 EN 61 000-4-3 : 1996
Voltage Fluctuation
EN 6 1000-3-3 : 1995
.........................
.........................
.........................
.........................
Electrical Fast Transients
EN 6 1000-4-4: 1995
Surge Immunity
EN 61 000-4-5: 1995
Conducted Susceptibility
EN 6 1000-4-6: 1996
Power Frequency Magnetic Field
EN 6 1000-4-8: 1993
Voltage Dips1 Interrupts
EN 6 1000-4-
1
1 : 1994
-
Low Voltage Equipment Directive 73/23/EEC
&
amended by 93/68/EEC
EN 61010-1: 1993+A2: 1995
IEC 1010-1. 1990+A1: 1992+A2: 1995
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
CONTENTS
PRODUCT INTRODUCTION
1.l.Description
1.2.Feature
PAGE
.................................................
.......................................................
1
1
............................................................
2
TECHNICAL SPECIFICATIONS
..............................
5
PRECAUTIONS BEFORE OPERATION
3.1.Unpacking the Oscilloscope
......................
9
............................
9
3.2.Checking the Line Voltage
3.3.Environment
.....................................
9
.....................................................
10
3.4.Equipment Installation and Operation
......................
10
3.5.CRT Intensity
...................................................
10
3.6.Withstanding Voltage of Input Terminals
..................
10
PANEL INTRODUCTION
.........................................
11
4.1.Front Panel
.......................................................
13
4.2.Rear Panel
........................................................
32
OPERATION METHOD
...........................................
34
5.1.Readout Display
..................................................
34
5.2.Connecting Input Signals
......................................
37
.......................................
38 5.3.Adjustment and Checks
5.4.Function Check
5.5.Basic Operation
..................................................
40
...................................................
42
5.6.Digital Storage Functions
......................................
51
5.7.Measurement Application
.....................................
59
5.8.RS.232 Interface Remote Control
...........................
61
MAINTENANCE
..................................................
91
6.l.Fuse Replacement
6.2.Line Voltage Conversion
.......................................
91
6.3.Cleaning
...............................................
91
..........................................................
92
BLOCK DIAGRAM
................................................
93
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SAFETY TERMS AND SYMBOLS
These terms may appear in this manual or on the product:
WARNING. Warning statements identify condition 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 product or other property.
The following symbols may appear in this manual or on the product:
DANGER ATTENTION Protective
High Voltage refer to Manual Conductor
Terminal
Earth(ground)
Terminal
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FOR UNITED KINGDOM ONLY
NOTE: This leadlappliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the following code:
Green1 Yellow:
Blue:
Brown:
Earth
Neutral
Live (Phase)
As the colours of the wires in main leads may not correspond with the colours marking identified in your pluglappliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the
Earth terminal marked with the letter
E
o r by the earth symbol
@ o r coloured Green or Green & Yellow.
The wire which is coloured Blue must be connected to the terminal which is marked with the letter N o r coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or coloured Brown o r Red.
If in doubt, consult the instructions provided with the equipment or contact the supplier.
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This cablelappliance 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
0.75mm2 should be protected by a 3A o r 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 detailed on this label.
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1.PRODUCT INTRODUCTION
1-1. Description
The GRS-6052 and GRS-6032 set a standard in performance and economy, each equips with two professional scopes in one. They can be operated as a real time
50 or 30MHz analog oscilloscope and become a full function digital storage oscilloscope by pressing a button. Now, you have the power for digital capture and analysis of elusive single shots with a full 20MSIs sample rate. The instruments provide with a high speed AID converter for each channel to enable the measurement. memory, and analysis of high-speed phenomena. A mi~roprocessor-based operating system controls most of the functions of the instrument, including cursor readout and digitized panel setting. On-screen alphanumeric readout and cursor function for voltage, time and frequency measurement provide extraordinary operational convenience. Ten different user defined instrument settings can be saved and recalled without restriction.
The vertical deflection system has two input channels. Each channel has 14 basic deflection factors from I m V to 20V per DIVision. The horizontal deflection system provides sweep time from 100s to trigger system provides stable triggering over the full bandwidth of the vertical deflection system.
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1-2.Features
Additionally, the oscilloscope offers several other features:
1) High intensity and internal graticule CRT
The oscilloscope employs a high intensity 6-inch retangular type 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) Multiple Digital Storage Functions
Digitizing repetitive waveform up to full bandwidth 50130MHz through the use of equivalent sampling (SOOMSIs).
2k-word acquisition memory per channel up to 10 sets
SAVEIRECALL reference memories (with back-up) are provided.
Pre-trigger function for observing waveforms before triggering. The trigger point can be selected from 0-1 0 DIV (in 0.02DIV steps).
Roll mode is ideal for observing flickering low-speed signals. The
TIMEIDIV range up to 100s.
The averaging function can be selected freely from 2 to 256. This effectively reduces noise from repetitive signals.
The smoothing (dot-join) function provides linear connections between the captured point, ensuring that digitized signals are displayed without gaps.
In the magnification mode, the DOT or LINEAR interpolation can be selected according to the waveform.
The built-in RS-232C interface enables remote control operation and signal processing via a PC.
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The X-Y mode is same as the real time mode. The X (horizontal) signal is connected to the input of C H I , the Y (vertical) signal is applied to the input of CH2, and the storage waveform bandwidth up to 5OMHz130MHz.
3) ALT-MAG Function (both Real Time Mode and Storage Mode)
The primary sweep waveform along with the magnified sweep waveform can be displayed simultaneously using the ALT-MAG function. The magnification ratio can be selected from among three stages of X 5. X 10,
X
20
for magnifying the displayed waveform in the center of the CRT.
4) Convenient VERT-MODE Triggering
The sync signal source is decided automatically when vertical axis mode is switched. This means that you need not change the trigger source every time you switch the VERT-MODE.
5) TV triggering
Exclusive T V sync separator circuit technology provides stable TV signal measurements on fields. frames and lines.
6 ) Hold Off (Real Time Mode only)
The function allows the obtaining of stable synchronization for even complex waveforms that are difficult to synchronized by adjusting the trigger level alone.
7) CH 1 Signal Output
The CHI signal output is obtained by branching the input signal in the middle o f the signal line. A s the connector outputs the input signal at a rate o f SOmVIDIV, connecting a frequency counter makes it possible to measure the frequency of a very low signal while observing its waveform
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8) Z-axis intensity modulation (Real Time Mode only)
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 indicated additional information. Incorrect operation and the electrical end position of control knobs are indicated by a warning beep.
10) SMD manufacturing technology
The instrument is built by using the most advanced SMD technology so as to reduce the number of internal wiring and shorten the foil route on the pc board. This will also greatly increase the high frequency performance and the reliability of the product.
1 1 ) Compact size (275W X 130H >: 370D) mm and froni panel layout groups for easy-to-use.
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2.TECHNICAL SPECIFICATIONS
:RT
JERTICAL iYSTEM
Ty pe
Accelerating Potential
INTEN and FOCUS
Illumination
Trace Rotation
Z-axis Input
(REAL TIME mode only)
\sensitivity Accuracy
6-inch rectangular type with internal graticule;
0%. 10%,90% and 100% markers.
8 x 1 0 D I V ( I D l V = 1 cm)
Approx. l0kV (GRS-6052),
2kV (GRS-6032)
Front panel control.
Provided
Provided.
Sensitivity: at least 5V
Polarity : positive going input decrease intensity
Usable frequency range: DC to 2MHz.
Max. input voltage: 30V (DC +AC peak) at lkHz or less.
Input Impedance: approx. 3 3 k R (GRS-6052)
47k12 (GRS-6032)
/
ImV-2mVIDIV i calibrated steps in 1-2-5 sequence.
Continuously variable to 112.5 approu. of pane indicate value.
Vernier Vertical
Sensitivitv
Bandwidth(-3dB) and
Rise Time
GRS-6052
5mV-20VlDIV
ImV-2mVIDIV
Bandwidth(-3dB)
DC-50MHz
DC-7MHz
Rise Time
Approx. 7ns
Approx. 5011s
Maximum Input Voltage
. - input impedance
GRS-6032 Bandwidth(-3dB) Rise Time
5mV-20VlDIV
I mV-2mVIDIV
DC-30MHz
I 1
DC-7MHz
, Aonrox. 1 1.7n5
I .
1
Approx 50ns
400V (DC + AC peak) at IkHz or less
AC. DC. . GND
Approx. i M R 1 2 % 11 approx. 25pF
Vertical Modes
. d
Dynamic Range
C H I , CH2, DUAL(CHOP/ALT), ADD. CH2 INV.
(REAL nnlv)
GRS-6052: SDIV at 40MHz, 6DIV at 50MHZ
GRS-6032: SDIV at 20MHz, 6DIV at 30MHz
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-- -
HORIZONTAL
;weep Time
SYSTEM
:REAL T l M E mode)
TRIGGER
SYSTEM
;weep Magnification blaximum Sweep Time at MAG)
$LT-MAG Function
-- rrigger Coupling rrigger Slope
Trigger Sensitivity
External Trigger Input equence, continuous variable control between step
.t least 1:2.5.
:3%, 1 5 % at x5 and x 10 MAG, +8% at x20 MAG
:5. x10, x20 MAG iRS-6052:20ns/DIV (10nsIDIV uncalibrated) iRS-6032:50ns/DIV(l 0nsIDIV-40nsIDIV
~ncaiibrated. ivailable.
IUTO, NORM, TV
JERT-MODE, CHI, CH2, LINE, EXT.
I\C, HFR, LFR, TV-V(-), TV-H(-).
'+" or "- " polarity
GRS-6052
C H I ,
CH2
VERT-
MODE
EXT
20Hz-5MHz
5MHz-40MHz
40MHz-50MHz
GRS-6032
I
0.5 DIV 2.0 DIV 200mV
I I I I
I .5 DIV
I
3.0 DIV
I
800mV
1
2.0 DIV
1
3.5 DIV
I
1V :>
- - --
1
VtKI-
MOnF
.
I
EXT
I
0.5 DIV
1
2.0 DIV
I
200mV 20Hz-2MHz
2MHz-20MHz 1.5 DIV 3.0 DIV 800mV
20MHz-30MHz 2.0 DIV 3.5 DIV 1V
TV sync pulse more than 1 DIV (CHI, CHI
VERY-MODE) or 200rnv (EXT).
Input impedance: Approx. I MR//25pF(AC
.
-,
Max. input voltage: 400V (DC + AC peak) at lkHi
X-Y
OPERATION
(REAL T l M E mode)
Hold-off Time
Inout
Sensitivity
Bandwidth
Phase Difference
X-axis : CHI, Y-axis : CH2
1 mVlDlV-20VlDIV.
X-axis: DC-5OOkHz (-3dB)
3" or less from DC to 5OkHz
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-
IIJTPUT iIGNAL
IIGITAL iTORAGE
WNCTIONS l~cquisition 18 bit ADC
Max. Sampling Rate
Storage
Bandwidth(-3dB)
Dynamic Range x 2
SOOMSls for equivalent time sampling.
20MSIs for normal sampling.
Single shot: DC to 5MHz.
Repetitive : DC to 5OMHz (GRS-6052)
1 r
DC to 30MHz (GRS-6032)
Memory Length
Acquisition Memory 2k words1CH X 2, 1 k wordslCH (equivalent)
Save REF Memory
Display Melnory
I k words1CH X .
~ I
1 k wordsICH X 4 waveform (max.) l~quivalent: 0.2
u
slDIV
-
2 u s1DIV
Normal: 5 /L slDIV
Roll Mode: 0.2sIDIV
-
0. ls/DIV
-
100sIDIV x 5, X 10, x 20
1 OnsIDIV
Sweep Time
Sweep Magnification
Max. Sweep Time
MAG Interpolation
ALT-MAG Function
Dots, Linear
Available
Operation Mode
Smoothing Function
Pre-trigger
Auto, Norm. Single, Single-roll, Roll,
Average (2
-
256), RunIStop
X-Y
Dot Joint ONIOFF selectable
0
-
IODIV in 0 02DIV steps (at 5 ,u slDIV
-
0.1 s/DIV)
X-axis: CHI, Y-axis: CH2
X-Y Operation Storage Bandwidth : DC-50MHz (GRS-6052)
DC-20MHz (GRS-6032)
H : 100 points1DIV
ispl play
Resolution ( V : 25 p b i n t s l ~ ~ ~
. .
-
Waveform
X-Y: 25 x 25 points1DIV
10 sets (REF0
-
REF9) with back-up memory.
SAVEIRECALL f
I
Voltage : approx. 20mVIDIV (with 5 0 R terminal.)
Bandwidth: 50Hz to at least 5MHz.
Voltage : 0.5V*3%,
Frequency: approx. I kHz. square wave.
CH1 Signal Output
Calibrator Output
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Panel Setting Display
C H l i C H 2 sensitivity, sweep time, trigge condition, digital storage function
Panel Setting Save &
Recall sets
CURSOR
READOUT &
CONTROL
INTERFACE
Cursor Measurement
Cursor Measurement Function:
Cursor Resolution: 1125 DIV.
A
A T .
I I
Text Readout Intensity
Adjustable
Remote control via a PC.
RS232 Interface
Voltage
LINE POWER
REQUIREMENT
Frequency
Power Consumption
ACIOOV, 120V. 230V 1 1 0 % selectable.
50Hz or 60Hz.
Horizontal:
Approx. 70VA, 60W(max).
MECHANICAL
SPEC.
Dimensions
Weights
Indoor use
275(W) X 130(H) X 370(D) mm.
8 . 5 kg
I 1
Altitude up to 2000 m
Ambient temperature :
To satisfy specifications : I O t to 3 5 T ( 50' F to 95.F )
~ ~ : ~ , * ~ ~ , " E N T
Maximum operating ranges: 0°C to 40°C ( 32'F to 104°F
Relative humidity: 85% RH(max.) non condensing
)
Installation Category : I1
Pollution degree 2
STORAGE
TEMPERATUR
E & HUMIDITY
-10" to 70°C, 70%RH(maximum)
ACCESSORIES
Power cord.. ....................... 1
Instruction manual.. . . . . . . . . . . . . . 1
Probe ( X l i x 10) 2
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3.PRECAUTIONS BEFORE OPERATION
3-1.Unpacking the Oscilloscope
The product has been fully inspected and tested before shipping from the factory. Upon receiving the instrument, please unpack and inspect it to check if there is any damages caused during transportation. If any sign of damage is found, notify the bearer and/or the dealer immediately.
3-2.Checking the Line Voltage
The oscilloscope can be applied any kind o f line voltage shown in the table below. Before connecting the power plug to an AC line outlet, make sure the voltage selector of the rear panel is set to the correct position corresponding to the line voltage. It might be damaged the instrument if connected to the wrong AC line voltage.
WARNING.
To avoid electrical shock the power cord protective grounding conductor must be connected to ground.
When line voltages are changed, replace the required fuses shown as below:
Line voltage
1 OOV
120V
Range
90- 1 1 OV
108-132V
T
Fuse
1A 250V
WARNING.
To avoid personal injury, disconnect the power cord before removing the fuse holder.
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3-3.Environment
The normal ambient temperature range of this instrument is from 0" to 40°C
(32" to 104°F). To operate the instrument over this specific temperature range may cause damage to the circuits.
Do not use the instrument in a place where strong magnetic or electric field exists as it may disturb the measurement.
3-4.Equipment Installation, and Operation
Ensure there is proper ventilation for the vents in the oscilloscope case. If the equipment is used not according to the specification, the protection provided by the equipment may be impaired.
3-5.CRT Intensity
To prevent permanent damage to the CRT phosphor, do not make the CRT trace brighten excessively or leave the spot stay for an unreasonably long time
3-6.Withstanding Voltages of Input Terminals
The withstanding voltages of the instrument input terminals and probe Input terminals are shown in the following table. Do not apply voltages higher than these limits.
I n p u t terminal
C H I , CH2, inputs
EXT TRIG input
Probe inputs
Z AXIS input
1
M a x i m u m i n p u t voltage
400V (DC + AC peak)
400V (DC
+
AC peak)
600V (DC + AC peak)
30V (DC
+
AC peak)
1
CAUTION.
To avoid damaging the instrument, do not apply input voltages of the frequency over
1
kHz to the instrument.
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4.
PANEL INTRODUCTION
After the instrument is switched on, all the important settings are displayed in the readout. T h e LED'S located o n the front panel assist operation and indicate additional information. Incorrect operation and the electrical end positions of control knobs are indicated by a warning beep.
All of the pushbuttons, VOLTSIDIV control knobs, TIMEIDIV control knobs are electronically selected, and their functions and settings can therefore be stored and remotely controlled as well. Some controls are only operated in the digital storage mode or have a different function. Explanation pertaining to them are indicated with the hint o f "storage mode only".
The front panel is subDIVided into five sections:
Display controls
Vertical controls
Horizontal controls
Trigger controls
Digital storage functions
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Front panel of GRS-6052
-
12 -
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4-1.Front Panel
Display controls
The display controls ad.just the on-screen appearance of the waveform and provide a probe compensation signal source.
( I ) POWER -
When switch on the oscilloscope to have all LEDs lighted and wait a few seconds, the normal operation mode is present. Then the last settings become activated and the LED indicates "ON" condition.
(2) TRACE ROTATION
The TRACE ROTATION is for aligning the horizontal trace in parallel with graticule lines. This potentiometer can be adjusted with a small screwdriver.
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(3)
INTEN-Control k n o b ( R E A L T I M E M o d e only)
The control knob is used for adjusting the traces intensity in the real time mode. Turning the knob clockwise to increase the intensity while turning it counterclockwise to decrease the intensity.
(4) F O C U S
The control knob effects both the trace and the readout sharply.
(5) C A L
The terminal provides a reference signal of O.5Vp-p at ] k H z for probe adjustment.
( 6 ) G r o u n d Socket-Banana Socket galvanically connected to safety e a r t h
This socket can be used a reference potential connection for DC and low frequency signal measurement purpose.
(7) TEXTIILLUM-Control k n o b with a d o u b l e function.
The pushbutton is for selecting the text readout intensity function or scale illumination function, and indicates the letter "TEXT" or "ILLUM" in the readout. Press the pushbutton for the following sequences:
"TEXT" - "TEXT"
The TEXTIILLUM function is associated the VARIABLE (9) control knob. Turning the knob clockwise to increase the text intensity o r scale illumination, while turning the knob counterclockwise to decrease it.
Pressing the knob to switch the TEXTIILLUM on o r off.
In the STORAGE mode, the brightness o f the waveform on the screen can be controlled by the "TEXT".
(8) C U R S O R S M E A S U R E M E N T F U N C T I O N
There are two pushbutton and associated the VARIABLE (9) control knob.
When the pushbutton is pressed, the three measurement functions will be selected in the sequence as follows.
AV-AT-llAT-OFF
A V : T w o horizontal cursors appear. T h e voltage between the two cursors
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USER MANUAL is calculated according t o the setting of VOLTSIDIV. and displayed with A V on the upper side of the CRT.
Single channel mode (CHI o r CH2):
The A V measuring result is automatically related to the deflection coefficient of the active channel. The readout displays " A V l ...'. or
" A V 2 ...".
Dual channel mode:
The cursor lines must be set on the C H I or CH2 signal. As the deflection coefficients may be different, it will be required to select between the deflection coefficient of CHI and CH2.
ADD mode:
In ADD (addition) mode, normally two input signals are displayed as one signal (sum or difference). As the result can only be determined if both (calibrated) deflection coefficients are equal, the readout indicates
"
A information. Different deflection coefficient settings or uncalibrated deflection coefficients are indicated in the readout as
V=. .
. DIV".
X-Y mode:
" A
In the X-Y mode, the instrument is automatically set to A V measurement. The deflection coefficient selected for each channel may be different, thus as in DUAL mode the A V cursor measurement requires a channel selection. Under channel 1 (X signal) measuring condition the cursor lines are displayed as vertical lines and the readout displays " A V X ...". Pressing the pushbutton, select channel 2 ( Y signal) measuring, then the cursor lines are displayed as horizontal lines and the readout indicates " A V Y . . ."
AT: Two vertical cursors appear. The time between the two cursors is calculated according to the setting of TIMEIDIV, and displayed with
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A T on the upper side of the CRT. l / A T : Two vertical cursors appear. The reciprocal of the time (frequency) between the two cursors is calculated with I I A T on the upper side of the CRT.
Cl-C2-TRK Pushbutton
The cursor 1. cursor 2 and tracking can be selected by this button.
Pressing the pushbutton to select the cursors in sequence as follows:
C1: Moves the cursor 1 on the CRT.
C2: Moves the cursor 2 on the CRT.
TRK: Simultaneously moves the cursor 1 and cursor 2 with the interval between the two cursors unchanged.
(9) VARIABLE-
Set the cursor position, TEXTIILLUM, etc. by turning or pressing the
VARIABLE knob.
In the cursor mode, pressing the VARIABLE control knob to select the cursor position between FINE and COARSE adjustment. When select
FINE adjustment by turning the VARIABLE, the cursor lines will move slowly. If select COARSE adjustment, he cursor will move fast.
In TEXTIILLUM mode, this control knob can be used to set the text intensity or illumination. Please refer to TEXTIILLUM(7) for details.
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(1 0 ) . q SAVE-RECALL
USER MANUAL
,
The instrument contains I 0 non-volatile memories, which can be used by the operator to save instrument setting and to recall them. It relates to all controls which are electronically selected.
, pushbutton to select the memory location. The readout Press
4 or
"M" followed by a cipher between 0 and 9. Each then indicates the letter time the
, pushbutton is briefly pressed the memory location cipher increases until the number 9 is reached. he
4 pushbutton is similar but decreases the memory location cipher until the number 0 is reached.
Pressing and holding SAVE for approx. 3 seconds to write the instrument settings in the memory and indicate the associated readout information of
'To recall a front panel setup, select a memory location as described above.
Recall the settings by pressing and holding the RECALL pushbutton for approx. 3 seconds. the readout then indicates the associated readout information o f " ".
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Vertical controls
The vertical controls select the displayed signals and control the amplitude characteristics.
Q QQ
Pressing briefly the C H I (CH2) button to set the channel 1 (channel 2) of the instrument on, the deflection coefficient will be displayed in the readout indicating the current conditions.
( 1 3 )
CHI
POSITION-Control knob
The vertical trace position o f channel 1 can be set with the control knob.
When X-Y operation in the Storage mode, CHI POSITION control knob is used for the X deflection.
(14) CH2
POSITION-Control knob
The vertical trace position of channel 2 can be set with the control knob.
In X-Y operation, CH2 POSITION control knob is used for the Y deflection.
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( IS) A L T I C H O P
In the REAL TIME mode, the pushbutton has two functions, which are required and available only when both channels are active.
ALT-Displays in the readout, indicates alternate channel switching.
After each time base sweeps the instrument internally, switches over from channel 1 and channel 2 and vice versa.
CHOP-Indicates chopper
The channel switching occurs constantly between channel 1 and channel 2 during each sweep.
In the STORAGE mode, A L T or C H O P mode is automatically selected by
TIMEIDIV range. The A L T mode is established for the sweep range of
O.Sms/DIV or faster. The C H O P mode is established for the sweep range of I msIDIV or slower.
(16) ADD-INV-Pushbutton with double functions.
ADD- Displays the "+" symbol in the readout, indicates additional mode.
Whether the algebraic sum (addition) or the difference (subtraction) o f both input signals is displayed, depends on the phase relationship and the
1NV setting. A s a result, both signals are displayed as one signal. For correct measurements, the deflection coefficients for both channels must be equal.
INV-Pressing and holding the pushbutton to set the channel 2 invert function on or off. The invert on condition is indicated by the
"
G " symbol in the readout. The invert function causes the signal display of channel 2 to be inverted by 180'.
(17)
CHI
VOLTSIDIV
(18)
CH2
VOLTSIDIV- Control knob for channel Ilchannel 2 has double functions.
Turning the knob clockwise to increase the sensitivity in 1-2-5 sequence
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USER MANUAL and turning it in the opposite direction (CCW) to decrease. The available range is from ImVIDIV up to 20VlDIV. The knob is automatically switched inactive if the related channel is switched off.
The deflection coefficients and additional information regarding the active channels are displayed in the readout.
V AR
Pressing the VOLTSIDIV control knob to select the VOLTSIDIV function between attenuator and vernier (variable). The current setting is displayed by the ">" symbol in the readout.
After switching on the VAR, turn the VOLTSIDIV control knob counterclockwise to reduce the signal height, and the deflection coefficient becomes uncalibrated.
(19) CHI AClDC
(20) CH2 AClDC
Pressing the pushbutton briefly to switch over from AC (- symbol) to DC
(= symbol) input coupling. The setting is displayed in the readout with the deflection coefficient.
(21) CHI GND-PXlO
(22) CH2 GND
-
P
X 10 -Pushbutton of two functions.
GND
Each time when the pushbutton is pressed briefly, the input of the vertical amplifier is grounded. It is displayed in the readout as an earth
(ground) symbol ".
P X 10
Pressing and holding the pushbutton to select the indicated deflection coefficient of the channel displayed in the readout between 1 : 1 and 10: 1.
The probe factor of 10:l is displayed in the readout with the probe symbol " P X 10" in front of channel indication. When proceed cursor voltage measurement, the probe factor will be automatically included.
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The symbol must not be activated unless a 10:l attenuator probes are used.
(23) CHI-X-Input BNC socket
This BNC socket is the signal input for channel 1 . In X-Y mode, signals at this input are used for the X deflection. The outer (ground) connection is galvanically connected to the instrument ground and consequently to the safety earth contact o f the linelmains plug.
(24) CH2-Y-Input BNC socket
This BNC socket is the signal input for channel 2. In X-Y mode, signals at this input are used for the Y deflection. The outer (ground) connection is galvanically connected to the instrument ground and consequently to the safety earth contact of the lindmains plug
Horizontal controls:
The horizontal controls select the time base operation mode and adjust the horizontal scale, position and magnification o f the signal.
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(25)
H POSITION (Real Time mode only)
The control knob enables a horizontal position shift of the signals. In combination with MAG the function makes it possible to shift any part of the signal on the screen.
In X-Y mode, the control knob are used for the X deflection.
(26)
TIMEIDIV-VAR-
Control knobs
Turning the knob clockwise to reduce the deflection coefficient in a
1-2-5 sequence and turning it in the opposite direction (CCW) to increase. The time coefficient(s) will be displayed in the readout.
In the REAL TIME mode, the time deflection coefficients between
0.SsIDIV and 0.20 sJDIV can be chosen in 1-2-5 sequence, if the MAG function is not activated.
In the STORAGE mode, the sampling method is changed automatically by the TIMEIDIV range.
Equivalent sampling (EQU): 0.2 p s1DIV to 2 y s/DIV.
Only a repetitive signal can be stored.
Normal sampling (SMPL): 5 y sJDIV to 0 . lslDIV.
Single slot and repetitive signal can be stored.
Roll mode: 0.2slDIV to 100s/DIV.
For observing flickering low-speed signals.
VAR (Real Time mode only)
Pressing the pushbutton to select the TIMEJDIV control knob function between time base switch and vernier (variable). In the Real Time mode, after switching on the VAR, the time deflection coefficient is still calibrated until further adjustments are made. Turn the TIMEIDIV control knob counter clockwise to increase the time deflection coefficient (reduce the deflection speed) and the deflection coefficient becomes uncalibrated.
The current setting is displayed by the ">" symbol in the readout.
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(27) X-Y
Pressing the pushbutton when using the instrument as an X-Y oscilloscope. The time deflection coefficient is replaced by the "X-Y" symbol in the readout.
In this mode. the X (horizontal) signal is connected to the input of C H I ; the Y (vertical) signal is applied to the input o f CH2 and has a deflection range from less than I m V to 20VlDIV at a reduced band-width of
5OOkHz (Real Time mode).
In the Storage mode, the X-Y operation is same as the REAL TIME mode. T h e storage waveform bandwidth of both X and Y signal are up to
5OMHz/30MHz.
(28)
X l/MAG
Pressing the pushbutton the select the sweep time between X 1 (normal) and MAG (magnify). If the MAG function, the signal display will be expanded and consequently only a part of the signal curve is visible. The interesting part of the signal can be made visible with the aid of the H
POSITION control in the REAL TIME mode.
(29) MAG FUNCTION
X 5 - X l O - X 2 0 MAG
When MAG has been done, the displayed waveform will be expanded to the right and left with the center o f the CRT. The magnification ratio can be selected from among three stage of X
5 -
X 10- X 20 MAG by pressing this pushbutton.
ALT MAG
Pressing the pushbutton, the primary sweep waveform along with the magnified sweep waveform. The magnified can be displayed simultaneously using the ALT-MAG function. The magnified sweep waveform appears 3 DIVisions below the primary sweep waveform.
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Trigger controls
The trigger controls determine the sweep start timing for both signals.
HOLDOFF
30aV CAT
11
MAX 400Vpk
(30) ATOlNML
-
Pushbutton and indicator LEDs.
Pressing the pushbutton to select auto or normal trigger mode. The actual setting is indicated by a LED.
Each time when the pushbutton is pressed the trigger mode changes in the sequence:
ATO-NML-AT0
A T 0 (Auto)
Select the automatical mode, the sweep free-runs will display a baseline trace when there is no trigger signal. The setting of triggering level changed only when the TRIGGER LEVEL control is adjusted to a new level setting.
NML (Normal)
Select the normal mode, the input signal will trigger the sweep when the
TRIGGER LEVEL control is set within the peak-to-peak limits of an adequate trigger signal. When the sweep is not triggered, no baseline trace will be displayed.
Use this mode when effecting synchronization to a very low frequency signal (25Hz or less).
- 24 -
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(31) SOURCE-Pushbutton
Pressing the pushbutton to select the trigger signal source. The actual setting is indicated by the readout ("SOURCE", slope, coupling).
Each time when the pushbutton is pressed, the trigger source change in the sequence:
VERT-CH 1 -CH2-LINE-EXT-VERT
VERT (Vertical Mode)
For observing two waveforms, the sync signal changes alternately corresponding to the signals on CHI and CH2 to trigger the signal.
CHI
The signal applied to the channel 1 input connector is the source of the trigger signal.
CH2
The signal applied to the channel 2 input connector is the source of the trigger signal.
LINE
The triggering signal is obtained from a sample of the AC power source waveform. The trigger source is useful when the displayed waveform frequency is time related to the AC power source frequency.
EXT
The external signal applied through the EXT input connector is used for the external triggering source signal.
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(32) TV-Pushbutton for video sync signal selection
Separate the video sync signal from the composite waveform and direct it to the triggering circuit. The horizontal or vertical sync signals are selected by TV pushbutton. The current setting is displayed in the readout under item (source. video polarity, "TVV or TVH"). Each time when the pushbutton is pressed, the video sync signal is displayed in the sequences as follows:
TV-V-TV-H-OFF-TV-V
TV-V
Start the main trace at the beginning of a video signal field. The polarity must match the composite sync polarity (i.e,
' ' X - " for negative sync) to obtain TV field triggering on the vertical sync pulse
TV-H
Start the main trace at the beginning of a video signal line. The polarity must match the composite sync polarity to obtain TV line triggering on the horizontal sync pulse.
(33) SLOPE-Pushbutton for the triggering slope.
Briefly pressing the pushbutton to select the slope of the signal which is used for triggering the time base generator. Each time when the pushbutton is briefly pressed, the slope direction will switch from falling edge to rising edge, and vice versa.
The current setting is displayed in the readout under item "source,
SLOPE, coupling".
If in the TV trigger mode, it is synchronized only when the sync signal is negative. A
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(34) COUPLING-
Pressing the pushbutton to select the trigger coupling. The actual setting is indicated by the readout (source, slope "COUPLING'').
Each time when the COUPLING pushbutton is pressed the trigger coupling changes in the sequence:
AC-HFR-LFR-AC
AC
Attenuates trigger signal frequency components below 20Hz and blocks the DC component of the signal.
AC coupling is useful for triggering on AC waveforms that have a large
DC offset.
H F R (High Frequency Reject)
Attenuates high-frequency triggering signal components above 5OkHz.
HFR coupling is useful for providing a stable display of low-frequency components of complex waveforms and eliminates high-frequency interference from the trigger signal.
L F R (Low Frequency Reject)
Attenuates low-frequency triggering signal components below 30kHz and blocks the DC component of the trigger signal.
LFR coupling is useful for producing stable triggering on the high-frequency components of complex waveforms and rejecting low-frequency interference or power supply hum from the trigger signal.
( 3 5 ) T R I G G E R LEVEL-Control knob with TRG LED
Turning the control knob causes a different trigger input setting (voltage), and set to a suitable position for the starting of triggered sweep of the waveform. When rotate clockwise the control knob, the trigger point moves toward the positive peak of the trigger signal and rotate it
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When the setting (voltage) value is out of the changing portion of the observation waveform, the synchronization sweep stops.
TRG L E D
The TRG LED is lit if the triggering conditions are met. Whether the LED flashes or is lit constantly depends on the frequency of the trigger signal.
(36) HOLD-OFF-Control knob (REAL TIME mode only)
Used when the signal waveform is complex and stable triggering cannot be attained with the TRIGGER LEVEL(35) knob alone, rotate this control knob to adjust hold-off time(trigger inhibit period beyond sweep duration).
When control is rotated fully clockwise, the hold-off period is at
MINimum (normal). The hold-off period increases progressively with counterclockwise rotation.
(37) TRIG EXT-This BNC socket is the external trigger signal input.
Pressing the TRIG. SOURCE (3 1 ) pushbutton until the information of
"EXT, slope, coupling" is shown up in the readout switches the input on.
The outer (ground) connection is galvanically connected to the instrument ground and consequently to the safety earth contact of the linelmains plug.
The maximum input voltages of the input terminal are shown in the section of 3-6. "Withstanding voltage of Input terminals". Do not apply voltage higher than the limit.
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Storage Control
The Storage Control select the digital storage function.
STORAGE MENU (RUNI SINGLE UTILITY
(38) STORAGEIREAL TIME mode
Switch the REAL TIME mode to (digital) STORAGE mode by pressing the button. In this case, all the switches from (39) to (42) are valid.
When the switch is pressed again in the STORAGE mode, the REAL TIME mode is established again. In the STORAGE mode, the RUN LED blinks in synchronism with sampling.
(39) MENU
Press the pushbutton to change the ON-OFF of smoothing, the number of average, the interpolation method and the selection of SAVEIRECALL waveform memory. Each pressing changes the setting mode and the present setting mode is displayed at the top right on the CRT. The settings in each mode are changed by the VARIABLE (9) control knob. Please refer to section 5-7 for details.
(40)
RUNISTOP-Pushbutton and indicator LED
Pressing this pushbutton to stop sampling, resulting in the hold state, and the RUN LED is off. The current setting is indicated by the readout
("STOP").
Further pressing the pushbutton lo release hold state and start sampling states.
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(41) SINGLE
Pressing the pushbutton to set the SINGLE mode and the "SINGLE" message will be indicated in the readout.
In this operation mode, a single signal acquisition process or sweep can be started with a trigger. Providing the trigger circuit has been previously activated with reset function, SINGLE is automatically switched to normal triggering (NML LED lights up). Otherwise the trigger automatic would start the signal acquisition processes without an input (trigger) signal.
Pressing the RUNISTOP pushbutton (reset function) again to resume a new single event capture which then overwrites the previously recorded display.
(42) UTILITY
The instrument software contains several utility setting. Each time when the
UTILITY pushbutton is pressed, the readout displays the following message in the sequence at the top right of the CRT:
RS232 baud rate
BEEP ONIOFF
FACTORY DEFAULT loading
RS232 Baud Rate
The setting of baud rate and data format on the instrument must be the same as the one on the computer. The baud rate of the RS-232 interface can be selected by turning the VARIABLE control knob according to the list as follows:
300-900-1200-2400-4800-9600
Press the VARIABLE control knob to set RS-232 baud rate, the screen will display "RM" in the upper left corner to show GRS-605216032 in the
Remote Control mode.
Note: When the baud rate is set, the front panel control will be locked.
Press UTILITY can unlock the front panel control and disable remote control.
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BEEP ONlOFF
When the "BEEP" is displayed, turning the VARIABLE control knob to set the beep on or off. In the "OFF" condition, the acoustic signals actuated by the control limits are switched off.
FACTORY DEFAULT loading
When the "FACTORY DEFAULT" is displayed, pressing the VARIABLE control knob to overwrite all panel setting memories (MEMO-MEM9), please refer to the setting as follows:
REAL TIME mode : ON
VERTICAL : CHI : ON, CH2: ON
VOLTSIDIV: 0.5V
COUPLING: AC
HORIZONTAL
TRIGGER
: TIMEIDIV: 100 ,g s
: MODE: A T 0
SOURCE: CHI
COUPLING: AC
SLOPE:
1
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4-2.Rear Panel
The rear panel provides input power and additional signal connections
(43)Line voltage selector a n d i n p u t fuse holder-Select power source and contain the primary power fuse
The fuse rating is shown in the section of 3-2 Checking the line voltage.
(44)AC power i n p u t connector
Connect the AC power cord to the power supply of instrument, the power cord protective-ground connection is connected to the exposed metal part of the instrument. The power cord must be connected to a proper grounded source for electrical-shock protection.
(45)CHl
Output-BNC socket
This output may be used to connect to a frequency counter or other instrument.
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(46)Z-Axis Input-BNC socket
Connect external signals to the Z-axis amplifier for intensity modulating the CRT display. This terminal is DC-coupled. The intensity is lowered by a positive signal, while it is increased by a negative signal.
(47)RS-232-Connector
Connect to other equipment with the RS-232 interface.
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5.
OPERATION METHOD
This section contains basic operation information and techniques that should be considered before proceeding any measurement. A s for the location and function of instrument controls, connectors, and indicators, refer to the
"Instruction of Front Panel and Rear Panel" of this manual.
5-1.Readout Display
The CRT readout display indicates how to set up the instrument controls. N o physical marking shown on the rotating switches indicates the control setting.
A key to the location and type of readout information display are illustrated in figure 5- l (a) and 5- l (b):
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MEASUREMENT
FUNCTION AND VALUE
SAVE OR RECALL MESSAGE
NO. OF MEM:MO-M9
Q:S~VE
-
TEXT INTEN OR ILLUM
I
CHI VAR
UNCAL: z
C H I
VOLTSiDlV
C H I
INPUT COUPLING
AC: 'L
DC: r=
GND: ., ,j
PROBE XI0 x20
I
My
TRIGCWPLINO
AC
HFR
CH2
I w
ADD
CH2
VOLTSlDlV
1
SWEEP VAR
UNCAL.>
SWEEP TIME
S.'DIV
-
CH2
INPUT COUPLING
AC: 2,
DC: x
TRIG SOURCE
VERT cn.1
CH2
LINE
EXT
LFR f t o r l V POL u
Figure 5-l(a) REAL TIME mode Readout Layout
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TRIGGE POINT P
SAMPLII*IG MODE
EQU
'
-
2usIdlv
SMPL 5us
-
0 lsldiv
ROLL 0 25
-
100sIdiv
PRE TRIGGER OR
CURSOR MEASUREMEINT
FUNCTION AND VALUE RATE
140 OF AVERAGE
OR SII4GLE MODE
REFEREIJCE
MEMORY -
REFO-REF9
REFERENCE
MEMORY
VOLTSIDIV
Figure 5-l(b)
Storage Mode Readout Layout
1
REFERENCE
MEMORY
TIMEJDIV
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5-2.Connecting Input Signals
G r o u n d i n g
The most reliable signal measurements are made when the oscilloscope and the unit under test are connected by a common reference (ground lead) in addition to the signal lead or probe. The ground lead of the probe provides the best grounding method for signal interconnection and ensures the maximum amount of signal-lead shielding in the probe cable. A separate ground lead (with a banana plug) can also be connected from the unit under test to the oscilloscope ground jack on the front panel.
Probes
A probe provides the most convenient way to connect an input signal to the oscilloscope. The standard x l / x 10 probes supplied to the oscilloscope are shielded against electromagnetic interference and have a high input impedance for low circuit loading.
CAUTION. To get t h e best waveform precisely, keep probe ground a n d signal leads a s short as possible.
Misadjust probe compensation can cause measurement error. Check and adjust probe compensation whenever a probe is moved to a different channel or oscilloscope. As for the probe compensation adjustment procedure, refer to the "Probe Compensation".
Coaxial Cables
Signal input cable can greatly affect the accuracy of a displayed waveform.
To maintain original frequency characteristics of the input signal, use only high-quality, low-loss coaxial cables. Coaxial cables must be terminated at both ends in their characteristic impedance to prevent signal reflections within the cable. Use suitable impedance-matching devices.
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5-3.Adjustments and checks
Trace Rotation Adjustment
Normally, when the trace is in parallel with the center horizontal graticule line, there will be no need to adjust the TRACE ROTATION. If necessary, adjust the TRACE ROTATION to make the baseline trace parallel to the center horizontal graticule line by using a small straight-blade screwdriver or alignment tool.
Probe Compensation
To minimize the distortion of measured waveforms, check the compensation of your probes before using them. The probe compensation should be checked periodically whenever the probes are moved to different input channels.
1. Install the probes onto the oscilloscope (Press the BNC connector onto the channel input and rotate the connector to lock it into place).
2. Set the probe slide switches to the x 10 position.
3. Briefly pressing the CHIICH2 button to set the oscilloscope to channel 1 and channel 2
4. Pressing and holding the PxlO button to set the indicated deflection coefficient of the channel displayed in the readout as a symbol "P10"
5. Attach the probe tips to the CAL connection in the front of the oscilloscope.
6. Set the oscilloscope controls to display both channels:
VERTICAL: VOLTSIDIV
COUPLING
ALTICHOP
0.2V
DC
CHOP
HORIZONTAL:
TRIGGER:
TIMEIDIV
MODE
SOURCE
COUPLING
SLOPE
0.5ms
A T 0
VERT
AC
=k
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7. Observe the displayed waveform and compare them with the waveforms shown in figure 5-2. If either probe needs to be adjusted, proceed the step 8.
If either probe does not need to be adjusted, proceed the "Function Check". m c m
Figure 5-2 Typical Compensation Waveform
8. Adjust the probe by using a small insulated screwdriver. Slowly rotate the adjustment control until the probe is properly compensated.
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5-4.Function Check
When you start to check the operation of your oscilloscope, proceed the following instruction:
1. Install the x 10 probes onto CH 1 and CH2 inputs.
2. Connect the probe tips to the CAL test point of the oscilloscope.
3. Set the oscilloscope controls to display both channels:
VERTICAL: VOLTSIDIV
COUPLING
ALTICHOP
0.2V
DC
CHOP
HORIZONTAL:
TRIGGER:
TIMEIDIV
MODE
0.5ms
A T 0
SOURCE VERT
COUPLING
SLOPE
AC
=k
The figure 5-3 below illustrates a satisfactory display. The waveform should be approximately O.5Vp-p at a frequency o f 1kHz that confirms the vertical and horizontal deflection function of the oscilloscope.
Figure 5-3 Function Check
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4. Set both CHI and CH2 COUPLING to GND.
5.Use the CHI and CH2 POSITION controls to align both traces on the center graticule.
6. Open the CH2 INV by pressing and holding the pushbutton.
7. Set to the ADD mode by pressing the ADD pushbutton briefly.
8. Set both CH 1 and CH2 COUPLING to DC.
9.The figure 5-4 below shows a satisfactory display. The display will show a flat trace located on the center graticule that confirms the channel balance and ADD offset function
Figure
5-4
ADD mode
10. Turn off the ADD mode by pressing the ADD pushbutton briefly.
1 1. Turn off the CH2 INV by pressing and holding the pushbutton.
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5-5.Basic Operation
Displaying CHI or CH2
To display the signal from a signal channel, pressing briefly the CHI or CH2 pushbutton to set the oscilloscope to channel 1 or channel 2.
Displaying CHI and CH2
To display both signals at the same time, proceed the following steps:
1.Set the CHI and CH2 on. The figure 5-5 below shows two synchronous waveforms in the both modes.
2.Adjust the CHI or CH2 POSITION control to position the two waveforms.
3.Set the ALTiCHOP button to CHOP mode if the waveforms are flickering.
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Displaying the sum or difference o f CHI and CH2
To display the algebraic sum or difference of CHI and CH2, proceed the following steps:
1 .Set the ADD button to ADD mode. The figure 5-6 below shows the sum of the waveforms from figure 5 - 5 .
2.Set the CH2 INV on by pressing and holding the button, if necessary, to display the different waveform.
3. Pressing and holding one of the VOLTSIDIV control knob to set it to vernier (variable). Then adjust one channel to the other in the event of gain difference.
Figure
5-6
Typical ADD waveform
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Comparing Frequency and phase (X-Y Operation)
To compare the frequency and phase between two signals by using the X-Y mode. The X-Y waveform displays different amplitude, frequency, and phase. The figure 5-7 shows a typical waveform made up of two signals that are of the same frequency and amplitude, but approximate 45' out of phase.
To use the oscilloscope in the X-Y mode, proceed the following steps:
1. Connect the horizontal or X-axis signal to the CHI input.
2.Connect the vertical or Y-axis signal to the CH2 input.
3. Set the X-Y button to X-Y operation (shown as Fig. 5-7 below).
Use the HORIZONTAL POSITION control to adjust the X-axis.
Note: When high frequency signals are displayed in the X-Y Operation, note the frequency bandwidths and phase difference between X and Y axis. Refer to "2. SPECIFICATION" section for details.
Figure 5-7 Typical single X-Y display.
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Magnifying Waveform Events
Use the MAG pushbutton to view small portions of a waveform as which is too far back from the starting point to view by using the TIMEIDIV control.
T o use the MAG button, proceed the following steps:
1.
2.Rotate the HORIZONTAL, POSITION control to move the event to display on the center of screen.
3. Press the MAG button.
4.Select MAG X 5. MAG X 10, or MAG X 20 for MAG function.
When above procedures have been done, the displayed waveform will be expanded 10 times to the right and left from the center of screen as center of expansion.
Figure 5-8 Magnified Waveform
45 -
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MAG-ALT
Function
The input Signal is displayed by pressing MAG(magnify) and
MAG-ALT(LED light) buttons:
1.Set the wished portion of the waveform to the center of the screen for magnification.
2.The magnified waveform spreads about 3 DIVisions below the normal ( X
I ) waveform.
3.It is a normal function when the MAG-ALT button is pressed, the characters will be vanished from the screen.
Figure 5-9(a) Mag. X 1 Waveform Figure 5-9(b) Mag. X 10 Waveform
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Operating H o l d off time Control (REAL TIME mode only)
When the measured signal is a complex waveform with two or more repetition frequencies (period), triggering with the LEVEL control alone may not be sufficient to attain a stable waveform display. In such a case, the sweep can be stable synchronized to the measured signal waveform by adjusting the Hold off time of the sweep waveform.
Figure 5-10(a) shows several different waveforms which overlapped on the screen, marking the signal observation unsuccessful when the hold off is set to minimum.
Figure 5-10(b) shows the undesirable portion of the signal is held off. The same waveforms are displayed on the screen without overlapping.
Sweep waveform
Figure 5-10(a) Hold-off Time Control
Figure 5-10(b) Hold-off Tim e Control
47
-
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Observing the Synchronization of two Waveforms
When two signals of the CHI and CH2 have the same frequencies with an integral number, or a specific time difference, the SOURCE selects either
CHI or CH2 as a reference signal. Select CHI signal from CHI position and select CH2 signal from CH2 position as a reference.
Set the SOURCE to VERT-MODE for observing the signal of different frequencies. Switch the sync signal alternately to each channel, the waveform of each channel will be triggered stably.
When set the SOURCE to VERT-MODE and set the ALTICHOP to ALT, the input signals applied to CHI and CH2 will become trigger source alternately during sweep. Consequently, even the waveforms of different frequency of each channel can be triggered stably.
Apply a sine wave to CHI and a square wave to CH2, "A"s shown in Figure
5-1 1 are at the level possible for synchronization. lnpui coupllng DC Input coupllng A C
Figure 5-11 Trig. Source on VERT
Apply AC coupling to CH2 in order to expand the synchronization range.
If the input signal of CHI or CH2 becomes small, adjust VOLTIDIV control knob to obtain sufficient amplitude.
The VERT-MODE triggering required 2.0 DIV which is larger than the amplitude of CHI or CH2.
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The VERT-MODE triggering is not possible when the signal is applied only to one channel as shown in Figure 5-12 below:
Figure 5-12 Trig. Source on VERT. one channel
ALTERNATE TRIGGER
The Jittering wave as shown in Figure may appear on the screen when a gently-slopping signal is displayed 10 cycles or less approximately by setting
VERT-MODE to SOURCE, and setting ALTICHOP pushbutton to ALT. For detailed and clear observation of each signal, set VERTICAL mode to CHI or
CH2.
Figure 5-13 Alternate Trig.
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Triggering of Video signal
In the work concerned with TV, complex signals and containing video signal, blanking pedestal signal, and synchronizing signal are often measured.
Press the TV pushbutton to set the T V position. The built-in active
TV-Sync-separator provides the separation of frame or line sync pulses from the video signal. To trigger the oscilloscope at the vertical (frame) rate, press the TV pushbutton to set TV-V and TV-H triggering. The figure 5-14(a) shows vertical signal of TV-V and Figure 5-14(b) shows horizontal signal of TV-H.
Figure
5-14(a)
TV-V Figure
5-14(b)
TV-H
The figure 5-15 shows the examples of TV polarity synchronization signals.
Note: This oscilloscope synchronizes with only ( -U-) synchronizing signal
REFERENCE:
Vidso rtgnal
Figure
5-15
TV Signal
-
50
-
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5-6. Digital Storage Functions
The operation procedure of the digital storage functions is described below.
Normal Sampling mode (SMPL)
1) Display the waveform to be stored in the REAL TIME mode.
2)
Press the STORAGE pushbutton switch and the RUN LED is on.
3) In this mode, a waveform is swept every trigger according to the setting state of controls on the front panel, the waveform to be stored is displayed on the CRT as it is. The slower the sweep rate, the longer the time is required for the acquisition and display of the waveform. It takes approximately 3 seconds until a waveform is acquired at the sweep range of 0.lslDIV. The trigger signal is generated thereafter.
Therefore, when the sweep rate is slow, the waveform is not displayed on the CRT immediately after the controls on the front panel have been
4) adjusted.
When the TIMEIDIV control is from 5 ,Y sIDIV to 0.
l
slDIV, both the single and the repetitive waveforms can be stored.
Equivalent Sampling Mode
(EQU)
When the TIMEIDIV control knob is set to 0 . 2 ~ (4 steps), only the repetitive waveform can be stored in the equivalent sampling mode.
The first (left end) rising and falling edges of the traces may not be displayed in the repeat mode range. In this case, measure the rising or falling edge on the second or later cycles of the waveform.
It takes 5 seconds or more to store the input signal of l k H z or lower. When the low frequency signal is stored, noise can be mixed. It is recommended to use a sine wave of lMHz or higher or a square wave with the rise time which is faster than 0.3 ,u s.
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Measure the rlslng and falllng edges of the trace onand alterthesecond cycle of the waveform
F~rst end) rislng and falling edge of the tmce can not be measured
\
Figure 5-16
ROLL mode
The displayed waveform is rolled from right to left (0.2sIDl IV to 100sIDIV).
The right end of each trace is the updating point of a new data. The Roll mode facilitates the measurement of a signal of approximately lOOHz or lower. Press the STOP switch to stop the ROLL mode and hold the final waveform on the CRT.
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Stored new data
Figure 5-17
NOTE:
Aliasing:
While measuring the signal in such STORAGE mode as SMPL, AVG, etc., the aliasing can be occurred by inputting a signal of more than half of the frequency with respect to the sample clock frequency at the sweeping range is added.
When the aliasing is occurred, the waveform o f the input signal frequency minus the sample clock frequency will be displayed. It is possible that this display is judged a current waveform. If the aliasing is suspected, select the
REAL TIME mode and check if the display is the same a s that in the actual operation mode.
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PRE-TRIGGER
Measure the waveform before the trigger point.
Although a conventional oscilloscope displays the trigger point only at the left end of the screen since the sweep starts at the trigger point of the signal, the instrument can display the trigger point anywhere on the screen in
O.lDIV steps, using the PRE-TRIGGER function in the STORAGE mode, so that it is possible to measure the waveform before the trigger point precisely.
1) When the MENU and CURSOR functions are off, the position of the trigger point is displayed.
2) The position of the trigger point is set by the VARIABLE control knob.
3) For example, in the case of 4.0DIV setting, the signal before the rising edge of the waveform (the triggered point) can be observed as shown in
Figure 5- 18 below
~ ~
Befor trlgger point
(4div display)
Trigger point
Figure 5-18
~
AfterTrlgger pomt
- - - - - -
54 -
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MENU
The on-off settings of the waveform smoothing, the number of average, the interpolation method in the horizontal magnification mode, the save and recall memory can be selected by the MENU pushbutton.
Each time when the MENU pushbutton is pressed, the readout displays at the top right of the CRT in the sequence as follows:
MENU 1 : SMOOTH
MENU 2: AVERAGE
MENU 3 : INTRPL
MENU 4: SAVE
MENU 5: RECALL
OFF
I) Smoothing selection mode
When the "MENU 1 : SMOOTH" is displayed at the top right of the
CRT, the smoothing is made on and off,
Setting marker by VARIABLE OFF: No Smoothing L
In case of OFF, the storage waveform is displayed by dots, while changing to ON, the dots are connected smoothly as result of a smooth waveform display.
When the sampling frequency is low with respect to the input signal frequency (when the signal of more than 5 cycles per division is connected), the amplitude to be display may be small. In this case, set the smoothing mode to OFF to display the waveform of the similar amplitude with the input signal. The setting can be done by the
VARIABLE control knob.
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2) Average setting mode
When the "MENU 2: AVERAGE" is displayed at the top right of the
CRT. the number of average can be set.
OFF : Average is not performed. Setting marker by VARIABLE
-256: Average is performed 2
-
256 times.
The number of average is selected by the VARIABLE control knob.
Turning the knob clockwise to change he number from OFF to
2-4-8-16-32-64-128-256 and turning the knob counter-clockwise to change the number in the reverse order. The average waveform is displayed after the data of the set sweep number has been acquired.
When the number of average is 16, the data is acquired 16 times (the
RUN LED blinks 16 times). Then the data is averaged and the average waveform display is updated. Thus, the non-repetitive signal affected by asynchronous noise can be picked up. The average operation is performed by setting the number of average. In the ROLL mode, the average operation is not performed.
3) Interpolation Method Selection mode
When the "MENU 3: INTRPL" is displayed at the top right of the CRT,
THE interpolation Method can be selected.
DOT: No interpolation t
LINEAR: Linear interpolation
Setting marker by VARIABLE
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The mode selection is made by the VARIABLE control knob. The interpolation method is how to interpolate the magnified data while magnifying the display waveform in the horizontal direction (except for the SAVEIRECALL reference waveform). In the case of DOT, the waveform is magnified as is in the horizontal direction.
In the case of LINEAR, the data is interpolated linearly, and the waveform is displayed smoother than at DOT. This is effective for a
4) square wave or sine wave.
Save reference memory setting mode
When the "MENU 4: SAVE" is displayed at the top right of the CRT, the save reference memory can be selected. Save completed
I
Source Waveform:
CHI: only CHI
I
I
Setting marker by VARIABLE
-
I
I
REFO: Save to REF0 memory CH2: only CH2 t
ADD: only CH 1+CH2
1
SUB: only CHI-CH2 REFO: Save to REF9 memory
The source waveform is automatically switched by vertical mode.
When both CHI and CH2 are active, pressing the VARIABLE control knob to select the source waveform between C H I and CH2.
Turning The VARIABLE control knob clockwise to change the number of reference memory from REFO to REF9 and turning the knob counterclockwise to change the number in the reverse order.
When the source waveform and the number of reference memory are established, pressing the SAVE pushbutton to write the source
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USER M A N U A L waveform in the memory and indicate the associated readout information o f " J
"
5) RECALL reference
When the "MENU5:RECALLm is displayed at the top right of the CRT, the recall reference memory can be selected. Recall Completed
I
REFO: Recall REF9 memory
Turning the VARIABLE control knob clockwise to change the number of reference memory from REFO to REF9 while turning the knob counterclockwise to change the number in the reverse order.
Recall the waveform on the C R T by pressing the RECALL pushbutton, the readout then indicates the associated readout information o f
''V
".
When this pushbutton is pressed again, the displayed waveform will be removed.
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5-7.Measurement Application
The oscilloscope has a cursor measurement system for making accurate, direct-readout voltage, time and frequency measurements. The measurements described in this section are examples of typical applications using this measurement system. After becoming familiar with the controls, indicators, and capabilities of the instrument, you can develop convenient methods to make the special measurement for your own applications.
Proceed a measurement by using the cursor according to the following steps:
1 . Press the [AV-AT, ]/AT-OFF] pushbuttons to turn on the cursor and measurement readout.
2. Press the pushbutton to select the seven measurement function in the sequence as below:
A V -AT -1lnT-OFF
3. Press the [Cl-C2 TRK] pushbutton to select C1 cursor, C2 cursor and tracking cursor.
4. Rotate the VARIABLE control knob to position selected cursor. Press one of the VARIABLE control knob to select FINE or COARSE cursor move speed
5. Read the measurement value on the screen. Typical measurement readouts and applications are shown in Figure 5-16. The measurement values are automatically controlled by the VOLTSIDIV and TIMEIDIV control settings.
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Figure 5-19: Cursor Measurement
(a).Typical A V (Voltage difference) for
AC voltage.
When both CHI and CH2 are turned on, the measurement value of C H l ( A V 1 ) .
(b).Typical A T(Time difference) cursor measurement for rise time.
Proceed rise-time or fall-time measurement requiring some additional signal scaling by using the graticule rise-time measurement aids. Number 0%,
10, 90 and 100 are etched near the left vertical graticule line. Use the following steps as a guideline to in making rise-time measurement:
(c).Typical I/ A cursor function for frequency measurement.
When the two cursors are superimposed at two edge points of the one period waveform by the [CI-C2 TRK] and
VARIABLE controls, the measurement value is displayed in frequency units on the upper side of the screen.
NOTE.
When the
VOLTSIDIV
or the
TIMEIDIV
controls are in uncalibrated setting, the
A V
and
A T
measurement values will be displayed with divisions.
When the vertical mode i s set to the
ADD
mode, and the C H I and C H 2
VOLTSIDIV
controls are set to different scales, the
A V
measurement values will be displayed with divisions.
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5-24 RS-232 Interface -Remote Control
5-8-1. RS-232 Configuration
The GRS-605216032 contains a DB 9-pin, male RS-232 connector for serial communication with a computer or terminal. The GRS-605216032 RS-232 interface is configured as an RS-232 "Data Terminal Equipment" so that data is sent from pin 3 and received on pin 2. For remote controls, the RS-232 interface has to be connected with a computer or terminal.
Pin Assignments
The pin assignments for RS-232 interface of GRS-605216032 are listed below
1. No connection
2. Receive Data (RxD) (input)
3. Transmit Data (TxD) (output)
4. No connection
5. Signal Ground (GND)
6. No connection
7. No connection
8. N o connection
9. No connection
Figure 5-20. Pin assignments of the RS232 connector on the rear panel for DB-9-D
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DB9 to DB9 Wiring
The wiring configuration is used for computer with D B 9 connectors that configured as Data Terminal Equipment.
GRS-605216032
(DB9, DTE)
Computer
(DB9, DTE)
Figure 5-21. DB9 to DB9 wiring
When the GRS-605216032 is set up with a RS232 interface, please check the following points:
Do not connect the output line o f one DTE device to the output line of the other.
Many devices require a constant high signal o n one or more input pins.
Ensure that the signal ground o f the equipment is connected to the signal ground of the external device.
Ensure that the chassis ground o f the equipment is connected to the chassis ground of the external device.
Do not use more than 15m of cable to connect devices to a PC.
Ensure the same configurations are used on the device as the one used on PC terminal.
Ensure the connector for the both side of cable and the internal connected line are met the demand of the instrument.
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Communication Mode
The same baud rate and data format must be set to the instrument and the computer.
The baud rate o f the RS-232 interface can be set as listed in the following table.
300
2400
Baud
Baud
900
4800
Baud
Baud
1200
9600
Baud
Baud
The data transmission format is N-8-1 (no parity bit, 8 data bits, 1 stop bits).
Computer's Connection
A personal computer with a COM port is the essential facility in order to operate the instruction via RS232 interface.
The connections between GRS-605216032 and computer are as follows:
I )
Connect one end of a RS232 cable to the computer.
2) Connect the other end of the cable to the RS232 port on the
GRS-605216032.
3 ) Turn on the GRS-605216032,
4) Turn on the computer.
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The RS232 connection testing
If you want to test whether the RS232 connection is working or not, you can send a command from computer. For instance, using a terminal program send the query command (uppercase) should return the Manufacturer, model number, serial number and firmware version in the following format:
If you d o not receive a proper response from the GRS-60x2, please check if the power is on, the RS232 configurations are the same on both sides, and all cable connections are active.
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5-8.2. RS-232 Remote Control
Command Syntax
All commands syntax is ASCII format. If you want to transfer any of the instructions to an instrument, there are five basic elements must be included.
Command header:
Distinguish commands
Command type:
Equal mark
( = ) :
Sets instrument state
Question mark
( ? ) :
Queries instrument state
Parameter (if required)
Instrument states value
Targef (if required)
Some commands need to be assigned specific channel
Message ferminator or separator
Command
Header
2 bytes
Command
TY pe
1 byte
Parameter
1
3
bytes
Target
1 byte
Message terminator or separator
1 byte
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Here are some valid examples remote control commands (not including message terminator):
V l = O l O A
H 4 = 0 0 1
M2?
* I D N ?
The following example includes the header, type, value for the parameter, and target (This command will set channel 1 vertical gain at 20mVlDIV):
Command Header:
V1
Command Type:
=
Parameters:
01 0
Target:
A
Note: The GRS-60x2 is sensitive to the case oj command characters. All of the commands are uppercase.
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Message Terminator and Message Separator
As there is no signal of end message on RS232 bus, therefore use LF (Line Feed,
OXOA) as message terminator. When a series of commands are sent to the instrument, it must add a LF to be a judgment for message terminator. As for query command, the return message of the instrument is also added a LF for PC to judge message terminator.
A semicolon separates one command from another when the commands appear on the same line.
Return Data Format
I f instrument received question m a r k (?) a t t h e third byte (command type) o f t h e command, it will answers
3
bytes value in ASCII format and 1 byte message terminator o f LF (OxOA).
T h e following e x a m p l e ask t h e T i m e base scale, a n d instrument will return
0 10 (. slDIV):
Example: H 1
?
(ASCII)
Return: 0 I (3 bytes, ASCII format)
If instrument receives WA?-WD?. It will return 1000 bytes channel 1 , channel 2 or 2 recalled waveforms data in Binary format and 1 byte message terminator.
Example:
W A ? (ASCII)
Return:
1000 bytes waveform data
Ox0 1 0x05
......
0x09
Message terminator
OxOA
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If instrument receives WO?-W9?. It will return 3 bytes waveform information,
1000 bytes waveforms data in Binary format and 1 byte message terminator.
Example:
W 5 ? (ASCII)
1
Return:
1
Vertical scale scale terminator
VAR=O: Vertical V A R function disable.
V A R = l : Vertical V A R function enable.
Vertical scale: 1
-
14(20V/DIV
-
I m V l D I V ) .
Horizontal scale: 10-27(. 1 s/DIV
-
.2us/DIV).
Combining Commands
You can use a semicolon (;) to combine commands and queries. The GRS-60x2 executes coherent commands in the order it receives them. When you coherent queries, the GRS-60x2 combine the responses into a single response message. For example, if the channel 1 display is ON (001) and horizontal time base scaIe equals to ImsIDIV (016), the query commands (must add 1 byte message terminator)
Instrument will return the message
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Buffer Size
The command receive buffer of instrument is 128 bytes. The return message buffer of instrument is 1024 bytes.
If your combining commands size is larger than 128 bytes, commands will be lost.
If you query the waveform data (WA? or WB?), the instrument will return 1000 bytes waveform data. Do not use any query commands during the data transmission.
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Command List
Note: Every command must add 1 byte message terminator of
LF
(OxOA).
Function
-
'CLR
Transmission Format
Vertical Scale
Input Coupling
Display
Probe
Invert
ADD
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Horizontal Scale
H 1 =<Parameters (3bytes)>
H I ?
Pre-trigger Position
H2=<Parameters (3 bytes)><Target
( 1
byte)>
H2?
H- VAR
H3=<Parameters (3bytes)>
H3?
XY Mode
H4=<Parameters (3bytes)>
H4?
Sweep Magnification
HS=<Parameters (3bytes)>
HS?
H6=<Parameters (3bytes)>
MAG-ALT
H6?
Tl=<Parameters (3bytes)>
Trigger Mode
T l ?
Trigger Source
Trigger Couple
T V Trigger
T2=<Parameters (3bytes)>
T2?
T3=<Parameters (3 bytes)>
T3?
T4=<Parameters (3bytes)>
T4?
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Trigger Slope
Dump Waveform
TS=<Parameters (?bytes)>
T5?
WA? WB? WC? WD?
W [0-91 ?
M l=<Parameters (3bytes)>
Smooth
Average
MAG Interpolation
M2=<Parameters (3bytes)>
M2?
M3=<Parameters (3bytes)>
M3?
Storage
I l o l ?
Text Intensity
Illumine Intensity
03=<Parameters (3bytes)>
0 3 ?
03=<Parameters (3bytes)>
0 3 ?
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Details of Command Reference
Each command in this chapter will give a brief description. The examples o f each command will be provided and what query form might return.
Note: Every command must add
I
byte message terminator of
LF
(OxOA).
Common Commands
Queries the unique identification code o f instrument
Return: GW,GRS60X2,0,V. 1.10
Clear the output buffer data of instrument
Unlock front panel control
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Load factory default setting into instrument
Vertical Controls Commands
Vertical Scale
V 1 = Parameters (3Bytes) Target
V 1 ? Target
Sets or queries the vertical gain of the specific channel.
Syntax
VI=OlOA
V l ? B
Arguments
Parameters:
001 -20VlDlV
005- 1 VIDIV
009-50mVlDIV
013+2VlDIV
Target:
A+Channel 1
002- 1 OVIDI
006+ .5VIDIV
0 10-20mVlDIV
014+ l mVIDIV
&>Channel 2
007+ .2VIDIV 008-. 1 VIDIV
01 1+ 10mVIDIV 0 12-5mVIDIV
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Input Coupling
V 2 = Parameters (3Bytes)
V 2 ? Target
Sets or queries the input coupling states.
Syntax
V2=00 1 B
V2?A
Arguments
Parameters:
000-Place scope in DC coupling state
001+Place scope in AC coupling state
002-Place scope in grounding state
Target:
A-Channel 1 B 4 C h a n n e l 2
Display
V 3 = Parameters (3Bytes)
V 3 ? Target
Target
Target
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GRS-605216032 OSCILLOSCOPE
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Sets or queries the channel's display.
Syntax
V3=00 1 A
V3?B
Arguments
Parameters:
000-Disable channel display
Target:
A+Channel 1 B-Channel2
001+Enable channel display
Probe
V 4 = Parameters (3Bytes) Target
V 4 ? Target
Sets or queries the probe attenuation factor.
Syntax
V4=00 1 B
V4?A
Arguments
Parameters:
000- 1 X
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Target:
A+Channel 1 B+Channel2
V 5 = Parameters (3Bytes) Target
V 5 ? Target
Sets or queries the vertical VAR function of the specified channel.
Syntax
V5=O7 1 A
V5=?B
Arguments
Parameters:
001 (uncalibrated, Max) to 71 (uncalibrated, Min) +Enable vertical VAR function and sets VAR value.
000 (calibrated) +Disable vertical VAR function.
Target:
A+Channel I B+Channel 2
Invert
V 6 =
-
Parameters (3Bytes)
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Sets or queries the invert function.
Syntax
V6=00 1
Arguments
Parameters
000-Disable invert function
001-Enable invert function
ADD
V 7 = Parameters (3Bytes)
Sets or queries the addition function.
Syntax
V7=OO 1
V7?
Arguments
Parameters:
000+Disable the addition function
00 l+Enable the addition function
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
V 8 = Parameters (3Bytes)
Sets or queries the ALTICHOP mode.
Syntax
V8=001
V8?
Arguments
Parameters:
000+ALT mode
00 1---CHOP mode
Horizontal Controls Commands
Horizontal Scale
H 1 = Parameters (3Bytes)
Sets or queries the horizontal time base scale.
Syntax
H1=010
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CiRS-605216032 OSCILLOSCOPE
USER MANUAL
H I ?
Arguments
Parameters:
00 1+ 100sIDIV
004+ 10dDIV
007- l s/DIV
010-+. l siDIV
013- 10msiDIV
016+ ImsiDIV
002- 5OsiDIV
005- 5sIDIV
008-..5slDIV
01 1-50msiDIV
0 14+ 5msIDIV
01 7+.5mslDIV
003+20s/DIV
006-.2sIDIV
009- .2s/DIV
0 12-20msIDIV
01 5+2rns/DIV
018+.2msiDIV
Pre-trigger Position
H 2 = Parameters (3Bytes)
H
1
2
I
?
I
Target
I
Sets or queries the horizontal pre-trigger position
Syntax
H2=300A
H2= 100B
H2?
Target
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Arguments
Parameters:
If Target=A, Parameter range-0 (0 DIV) to 500 (-1ODIV)
If Target=B, Parameter range-0 (ODIV) to 200 (4 DIV)
Target:
A+Pre B-Post
H-VAR
H 3 = Parameters (3Bytes)
Sets or queries the horizontal VAR function.
Syntax
H3=128
H3?
Arguments
Parameters:
080 (uncalibrated, Max) to 255 (uncalibrated, Min) -Enable horizontal VAR function and sets VAR value
000 (calibrated) +Disable horizontal VAR function
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
XY Mode
H 4 = Parameters (3Bytes)
Sets or queries the XY mode
Syntax
H4=001
H4?
Arguments
Parameters:
000&+Disable XY mode
0 0 1 b E n a b l e XY mode
Sweep Magnification
Parameters (3Bytes)
Sets or queries the MAG function.
Syntax
H5=002
H5?
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Arguments
Parameters:
000-MAG Disable
002+X10
001+X5
0 0 3 4 x 2 0
6 = Parameters (3Bytes) H
[ T I
Sets or queries the MAG-ALT mode
Syntax
H6=OO 1
H6?
Arguments
Parameters:
000b-Disable MAG-ALT mode
00 1kEnable MAG-ALT mode
1
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GRS-605216032 OSCILLOSCOPE
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Trigger Commands
Trigger
Mode
T I = Parameters (3Bytes)
Sets or queries trigger mode
Syntax
T1=001
T I ?
Arguments
Parameters:
000-Auto trigger mode
002+Single trigger mode
Trigger Source
T 2 =
001k-Normal trigger mode
Parameters (3Bytes)
Sets or queries the trigger source
Syntax
T2=00 1
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
T2?
Arguments
Parameters:
000+VERT
002-Channel 2
004+External
Trigger Caapling
T
3
= Parameters (3Bytes)
Sets or queries the trigger coupling
Syntax
Arguments
Parameters:
000+AC couple
002+Low frequency reject
T&T
%&gef
T
4 =
00 1 +High frequency reject
Parameters (3Bytes)
I
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Sets or queries TV trigger mode
Syntax
T4=00 1
T4?
Arguments
Parameters:
000-Disable TV trigger.
001-Vertical TV trigger mode
Trigger Slope
T 5 =
002+Horizontal TV trigger mode
Parameters (3Bytes)
1
Sets or queries trigger slope mode
Syntax
T5=00 1
T5?
Arguments
Parameters:
000-.Negative trigger slope 00 I-. Positive trigger slope
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Waveform Data Commands
Dump channel 1 waveform data
Dump channel 2 waveform data
Dump 2 recalled waveform data m\
Dump REF 0-9 waveform data
Syntax
WA?
W5?
Note: GRS 60x2 can't return waveform data in real-time mode or in roll mode( 1 OOs/DIV f o .2s/DIV) of storage mode.
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Menu Commands
M 1 = Parameters (3Bytes)
1
Sets or queries the waveform smooth function
Syntax
Arguments
Parameters:
000+Disable Smooth function
Average
M 2 =
001-Enable Smooth function
Parameters (3Bytes)
Sets or queries the waveform average function
Syntax
M2=006
M2?
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
Arguments
Parameters:
000-Disable average function
001- Average number is 2
003+Average number is 8
005-Average number is 32
007-Average number is 128
MAG Interpolation:
M 3 =
002+Average number is 4
0 0 4 j A v e r a g e number is 16
006-Average number is 64
OOS+Average number is 256
Parameters (3Bytes)
Sets or queries the MAG interpolation function
Syntax
M3=001
M3?
Arguments
Parameters:
000+Dot mode 001bLinear mode
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GRS-605216032 OSCILLOSCOPE
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Other Commands
Real-TimdStorage mode:
0 1 = Parameters (3Bytes)
Sets or queries the instrument operation mode.
Syntax
01=001
O l ?
Arguments
Parameters:
00 l+Real-Time mode 0 0 0 4 Storage mode
RunIStop:
0 2 = Parameters (3Bytes)
Sets or queries the waveform Runistop function
Syntax
02=00 1
0 2 ?
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GRS-605216032 OSCILLOSCOPE
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Arguments
Parameters:
000W Stop
Text intensity
0 3 =
001-Run
Parameters (3Bytes)
1
Sets or queries the text intensity
Syntax
03=030
0 3 ?
Arguments
Parameters:
000+Disable text display
Illumine intensity
0 4 =
001 (Min) to 060 (Max)-.Text intensi
Parameters (3Bytes)
Sets or queries the illumine intensity
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GRS-605216032 OSCILLOSCOPE
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Syntax
043125
04=00?
Arguments
Parameters:
000-.Disable illumine display 001 (Min) to 240 (Max)+Illumine intensity
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GRS-605216032 OSCILLOSCOPE
USER MANUAI
The instructions below are executed by qualified personnel only. To avoid electrical shock, do not perform any servicing other than the operating instructions unless you are qualified to do so:
6-1.Fuse Replacement
If the fuse blows, the power lamp indicators will not light and the oscilloscope will not start. The fuse should not normally open unless a problem has developed in the unit. Try to determine and correct the cause of the blown fuse and replace only with a fuse of the correct rating and type on the rear panel.
WARNING.
For continued fire protection. Replace fuse only with 250V fuse of the specified type and rating, and disconnect power cord before replacing fuse.
6-2.Line Voltage Conversion
The primary winding of the power transformer is tapped to permit operation from 100, 120, or 230VAC 50/60Hz line voltage. Conversion from one line voltage to another is done by changing the line voltage selector switch as shown in page 7. The rear panel identifies the line voltage to which the unit was factory set. To convert to a different line voltage, perform the following procedure:
(l).Make sure the power cord is unplugged.
(2).Adjust the line voltage selector switch to the desired line voltage position.
(3).A change in line voltage may also require a corresponding change of fuse value. Install the correct fuse value as listed on rear panel.
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GRS-605216032 OSCILLOSCOPE
USER MANUAL
6-3.Cleaning
To clean the oscilloscope, use a soft cloth dampened in a solution of mild detergent and water. Do not spray cleaner directly onto the oscilloscope because it may leak into the cabinet and cause damage.
Do not use chemicals containing benzine, benzene, toluene, xylene, acetone, or similar solvents. Do not use abrasive cleaners on any portion of the oscilloscope.
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GRS-605216032 OSCILLOSCOPE
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7.Block Diagram
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