Page 1 $XWRUDQJLQJ &RPEL6FRSH ,QVWUXPHQW Users Manual 2/1- Nov-1998 ®...
Page 2 7600 AR Almelo 98206-9090, USA The Netherlands Copyright 1997, 1998 Fluke Corporation All rights reserved. No part of this manual may be reproduced by any means or in any form without written permission of the copyright owner. Printed in the Netherlands...
Page 3 If you have any comments on how this product could be improved, please contact your local FLUKE organization. FLUKE addresses are listed in the back of the REFERENCE MANUAL. The REFERENCE MANUAL also contains:...
Page 4: Main Features
MAIN FEATURES There are five models in this family of FLUKE oscilloscopes. Each of these models is a combination of an analog real-time oscilloscope and a fully featured digital storage oscilloscope. By pressing a single key, you can switch the instrument from the analog mode to the digital mode and back.
Page 5 Peak detection for the capture of glitches as narrow as 5 ns. Pattern, State and Glitch triggering (2 ns) (2 channel models; 4ns Glitch triggering only) Event delay and pretriggering and posttriggering. TV triggering including HDTV and TV line selection. Serial interface for printing and plotting.
Page 6: Initial Inspection
Check the contents of the shipment for completeness and note whether any damage has occurred during transport. When the contents are incomplete or there is damage, file a claim with the carrier immediately. Then notify the FLUKE Sales or Service organization to arrange for the repair or replacement of the instrument or other parts.
Page 7 Chapter 2 describes grounding, line cord, fuses, and backup batteries. Getting started Chapter 3 provides a 10-minute tutorial intended for those who are not familiar with Fluke oscilloscopes. How to use more advanced Chapter 4 provides the more experienced user...
Page 8: Table Of Contents
VIII CONTENTS CONTENTS Page 1 OPERATORS SAFETY ....... . 1-1 1.1 INTRODUCTION .
Page 9 CONTENTS 3 GETTING STARTED ........3-1 3.1 FRONT-PANEL LAYOUT .
Page 10 CONTENTS 4.6 DIGITAL ACQUISITION AND STORAGE ....4-30 4.7 ADVANCED VERTICAL FUNCTIONS ..... 4-31 4.8 ADVANCED HORIZONTAL AND TRIGGER FUNCTIONS .
Page 11 CONTENTS Appendix A ACQUIRE menu structure ..... . A-1 Appendix B CURSORS menu structure ..... B-1 Appendix C DISPLAY menu structured .
Page 12 FRONT VIEW REAR VIEW...
Page 13 XIII FRONT PANEL CONNECTIONS Probe Adjust Squarewave output signal for e.g. probe calibration. Amplitude is calibrated. BNC input socket for vertical channel 1 with probe indication contact. BNC input socket for vertical channel 2 with probe indication contact. BNC input socket for vertical channel 1 with probe indication contact.
Page 14 REAR PANEL CONNECTIONS Z-MOD BNC input socket for external intensity-modulation of the CRT trace. RS-232 BUS (EIA-232-D) Input/output socket to connect the oscilloscope to an RS-232 Interface. NC=NOT CONNECTED ST6065 LINE IN Line input socket. Fuse holder is built in. FUSE...
Page 15 OPTIONAL REAR PANEL CONNECTIONS CH1 Y-OUT BNC output socket with a signal derived from the Channel 1 input signal. MAIN TB GATE BNC output socket with a signal that is "high" when the Main Timebase is running and "low" for the other conditions.
Page 16: Operators Safety
OPERATORS SAFETY 1 - 1 1 OPERATORS SAFETY ATTENTION: The instrument is designed for indoor use only. Read this page carefully before installation and use of the instrument. 1.1 INTRODUCTION The instrument described in this manual is designed to be used by proper-ly- trained personnel only.
Page 17: Symbols
1 - 2 OPERATORS SAFETY 1.4 SYMBOLS Read the safety information in the manual. Earth. Conformité Européenne. Recycling information. 1.5 IMPAIRED SAFETY PROTECTION The use of the instrument in a manner not specified may impair the protection provided by the equipment. Before use, inspect the instrument and accessories for mechanical damage! Whenever it is likely that safety-protection has been impaired, the instrument must be made inoperative and be secured against any unintended operation.
Page 18: Installation Instructions
INSTALLATION INSTRUCTIONS 2 - 1 2 INSTALLATION INSTRUCTIONS Attention: You are strongly advised to read this chapter thoroughly before installing your oscilloscope. 2.1 SAFETY INSTRUCTIONS 2.1.1 Protective earthing Before any connection to the input connectors is made, the instrument shall be connected to a protective earth conductor via the three-core mains cable;...
Page 19 2 - 2 INSTALLATION INSTRUCTIONS The mains (line) fuseholder is located on the rear panel in the mains (line) input socket. When the mains (line) fuse needs replacing, proceed as follows: disconnect the oscilloscope from the mains (line). remove the cover of the fuseholder by means of a small screwdriver. fit a new fuse of the correct rating and refit the cover of the fuseholder.
Page 20: Memory Back-Up Batteries
Note: This instrument contains batteries. Do not dispose of these batteries with other solid waste. Used batteries should be disposed of by a qualified recycler or hazardous materials handler. Contact your authorized Fluke Service Center for recycling information. 2.2.2 Installation of batteries Proceed as follows: Remove all input signals and disconnect the instrument line power.
Page 21: Handle Adjustment And Operating Positions Of The Instrument
2 - 4 INSTALLATION INSTRUCTIONS 2.4 HANDLE ADJUSTMENT AND OPERATING POSITIONS OF THE INSTRUMENT By pulling both handle ends outwards away from the instrument, the handle can be rotated to allow the following instrument positions: vertical position on its rear feet; horizontal position on its bottom feet;...
Page 22: Rs-232-C Serial Interface
INSTALLATION INSTRUCTIONS 2 - 5 2.6 RS-232-C SERIAL INTERFACE Your oscilloscope is equipped with an RS-232-C interface as standard. The interface can be used in a system for serial communication. The protocol used is CPL (Compact Programming Language). CPL is a small set of very powerful commands that can be used for full remote control.
Page 23: Getting Started
3 - 1 3 GETTING STARTED This chapter provides a 10-minute tutorial intended for those who are not familiar with Fluke oscilloscopes. Those who are already familiar can skip this chapter and continue to Chapter 4. 3.1 FRONT-PANEL LAYOUT This oscilloscope is a combination of an analog oscilloscope and a digital storage oscilloscope in the same instrument.
Page 24: Switching On The Instrument
3 - 2 GETTING STARTED Typical operation of your instrument will be: Switching on the instrument (see Section 3.2) Initial standard setup (see Section 3.2) Screen controls (see Section 3.3) Auto setup (see Section 3.4) Analog-Digital mode switching (see Section 3.5) Vertical setup (see Section 3.6) Timebase setup...
Page 25: Screen Controls
GETTING STARTED 3 - 3 3.3 SCREEN CONTROLS The screen controls can be adjusted for optimum trace, text and spot quality by the controls to the left of the screen. Figure 3.2 Screen control area The brightness on the screen is adjusted by two controls, one for the trace and one for the text.
Page 26: Auto Setup
3 - 4 GETTING STARTED 3.4 AUTO SETUP The best way to start each measurement is by using the AUTOSET key. This automatically finds and scales all relevant parameters on all channels. AUTO SET ST6659 9303 Figure 3.3 Measuring setup Step 1 Connect the probe as shown in figure 3.3.
Page 27 GETTING STARTED 3 - 5 Step 4 To prevent measurement errors, check the pulse response before any measurement. If the pulse shows overshoot or undershoot, you can correct this by using the trimmer in the probe’s body. Chapter 4 describes how to adjust the pulse response. ST5952 In most cases, using AUTO SETUP is sufficient for a good initial display of the signal(s).
Page 28: Mode Switching Between Analog And Digital Operating Modes
3 - 6 GETTING STARTED 3.5 MODE SWITCHING BETWEEN ANALOG AND DIGITAL OPERATING MODES You can use the yellow ANALOG key to switch from the analog mode to the digital mode and back at any time. The signal acquisition and display functions of both operating modes are very similar.
Page 29 GETTING STARTED 3 - 7 SIGNAL CRITERIA ANALOG MODE DIGITAL MODE You need to make adjustments Fastest Slower to the circuitry and watch display display the signal change update update Automatic measurements Can’t use Fully implemented Signal Math Add, Subtract All functions Add, Subtract, Multiply Signal...
Page 30: Vertical Setup
3 - 8 GETTING STARTED Step 3 Press AUTOSET again. This time the scope performs the autoset in digital mode. Step 4 Press the RUN/STOP key and observe that the trace is frozen and stays on screen even after removing the probe. Step 5 Press the RUN/STOP key to display the actual input signal again.
Page 31 GETTING STARTED 3 - 9 Step 3 You can change the amplitude of the signal in a 1, 2, 5 sequence by pressing one of the AMPL keys. Note that the bottom of the screen shows the AMPL/DIV setting of CH1. CH1 100mV CH1 500mV ST6681...
Page 32 3 - 10 GETTING STARTED Step 6 Press the ANALOG key to enter the digital mode Step 7 Press the top one (mV) of the AMPL keys, so that the signal has maximum amplitude. Press AUTO RANGE and see the signal change to a suitable attenuator value.
Page 33: Timebase Setup
GETTING STARTED 3 - 11 3.7 TIMEBASE SETUP The next step is the adjustment of the main timebase controls (TIME/DIV, X POSition, and MAGNIFY keys). MAGNIFY X POS AUTO RANGE TIME/DIV ST6435 9312 Figure 3.6 Timebase setup Step 1 Press the AUTOSET key. Step 2 Use the TIME/DIV keys on the right hand side of the instrument to decrease or increase the number of periods of the signal on the...
Page 34: Magnify (Expand)
3 - 12 GETTING STARTED 3.8 MAGNIFY (EXPAND) Step 1 You can use the MAGNIFY keys to expand the signal on the screen. The ’MGN’ indication and the corrected timebase setting are displayed in the text line. In the analog mode, magnification is limited to 10.
Page 35: Direct Trigger Setup
GETTING STARTED 3 - 13 3.9 DIRECT TRIGGER SETUP Now you are ready to set your trigger conditions. You will use one of the channel selection keys (TRIG1, TRIG2, TRIG3, TRIG4 or EXT TRIG) and the TRIGGER LEVEL control. Figure 3.7 Direct trigger setup Step 1 Press the AUTOSET key.
Page 36 3 - 14 GETTING STARTED Step 6 The same TRIG1 key that was used to select the trigger source is also used to select the trigger slope. Repeatedly pressing the TRIG1 button changes the triggering so that it occurs on the leading or trailing edge of the input signal.
Page 37: Pre-Trigger View
GETTING STARTED 3 - 15 3.10 PRE-TRIGGER VIEW One of the powerful features in the digital mode is the ability to capture and view signal contents prior to the actual trigger. The amount of pretrigger information can be as long as one full acquisition/record. The trigger position is adjusted with the TRIGGER POSITION control.
Page 38: More Advanced Features
3 - 16 GETTING STARTED 3.11 MORE ADVANCED FEATURES All basic functions are accessed by dedicated keys for fast and easy operation. Some of the more advanced features are menu operated. Menus are called up by pressing one of the keys identified with blue text on the front panel. After you press one of these keys, a menu is displayed on the right side of the screen.
Page 39: Cursor Operation
GETTING STARTED 3 - 17 3.12 CURSOR OPERATION Cursors are used for accurate amplitude or time measurements of the signal. CURSORS TRACK ST6431 9303 Figure 3.9 Cursor setup Step 1 Before you continue, reset the instrument with the STANDARD SETUP. To do this, press the STATUS key and TEXT OFF key simultaneously.
Page 40 3 - 18 GETTING STARTED Step 8 The top text line now shows the pulse repetition time of the signal (e.g., ch1: T= 500 s). ch1: CURSORS T= 500 s on off READ OUT 200 s 200mV ST6687 Step 9 Press the second blue softkey until ’=’...
Page 41: More Advanced Trigger Functions
GETTING STARTED 3 - 19 3.13 MORE ADVANCED TRIGGER FUNCTIONS Most of the trigger functions (source, slope, and level) can be controlled with direct access to the functions (see Section 3.9). A CRT menu is used for more advanced trigger functions. TRIGGER ARM’D TRIGGER...
Page 42: More Signal Detail With The Delayed Timebase
3 - 20 GETTING STARTED 3.14 MORE SIGNAL DETAIL WITH THE DELAYED TIMEBASE When you need to study a part of a signal in more detail, a second (delayed) timebase is available. This timebase has its own timebase settings and trigger level adjustment.
Page 43 GETTING STARTED 3 - 21 Step 2 Press the DTB key. The DELAYED TIME BASE menu is now displayed on screen. Turn the delayed time base on with the first softkey. DELAYED TIME BASE DEL’D TB on off MAIN TB on off starts trig’d...
Page 44: Trace Storage
3 - 22 GETTING STARTED 3.15 TRACE STORAGE In the digital mode you not only have the ability to store traces on the screen (using the RUN/STOP key), but also to store traces in memory for later use. ANALOG SAVE RECALL RUN/STOP ST6691...
Page 45 GETTING STARTED 3 - 23 Here is how traces are stored in memory: Step 6 Use the TRACK control to select an empty memory SAVE ACQ location such as m1, m2, or m3. Empty locations are MEMORY marked with a circle in front of the memory location number (e.g., m3).
Page 46: How To Use More Advanced Functions Of The Instrument
HOW TO USE THE INSTRUMENT 4 - 1 4 HOW TO USE MORE ADVANCED FUNCTIONS OF THE INSTRUMENT This chapter allows more experienced oscilloscope users to learn more about the advanced features of this instrument and how to use them. For a complete description of each function, refer to the next chapter in this manual: "Function Reference".
Page 47 2. The channels 3 and 4 are replaced by an external trigger channel as in the PM3390B. VERT Menu offers only BWLIMIT selection. PM3370B 60 MHz 2 Channel Oscilloscope The PM3370B has a bandwidth of 60 MHz. All other features are equal to those of the PM3380B.
Page 48 HOW TO USE THE INSTRUMENT 4 - 3 FRONT PANEL LAYOUT The controls on the front panel are grouped by function. In this chapter, a description for each group of controls is given in the following sequence: Display and probe adjustment (see section 4.2) Analog and digital modes (see section 4.3)
Page 49 4 - 4 HOW TO USE THE INSTRUMENT Study the front panel of your oscilloscope and observe what functions the different controls and push buttons (keys) perform. There are three different styles of push buttons, plus the blue softkeys adjacent to the screen. The push button functions are as follows: Direct function key.
Page 50: Display And Probe Adjustments
HOW TO USE THE INSTRUMENT 4 - 5 4.2 DISPLAY AND PROBE ADJUSTMENTS To help you follow the step-by-step descriptions, each section begins by recalling the standard setting as outlined below. If you get "lost", you can return to the beginning of each section, because all functions are set to a predefined state to create a correct start situation.
Page 51 4 - 6 HOW TO USE THE INSTRUMENT DISPLAY LAYOUT The following illustration shows the layout of the display with a maximum amount of text. Most text is active only when specific functions are activated.
Page 52 HOW TO USE THE INSTRUMENT 4 - 7 MENUS TEXT OFF A menu appears when a key with blue text is pressed. The menu functions can be selected by pressing the blue softkeys to the right side of the screen. Press the ANALOG key to select the digital mode.
Page 53 4 - 8 HOW TO USE THE INSTRUMENT CAL SIGNAL AND PROBE ADJUSTMENT Each measuring probe has been checked and adjusted before delivery. However, to match the probe to your oscilloscope, you must perform the following procedure to optimize the pulse response of the combination of oscilloscope input and probes.
Page 54: Analog And Digital Modes
HOW TO USE THE INSTRUMENT 4 - 9 4.3 ANALOG AND DIGITAL MODES ANALOG This instrument is a combination of an analog real-time oscilloscope and a digital storage oscilloscope, which offers a variety of additional features. The combination of analog and digital modes in one instrument gives you the advantages of both modes.
Page 55 4 - 10 HOW TO USE THE INSTRUMENT SIGNAL CRITERIA ANALOG MODE DIGITAL MODE Video signals Preferred when When using delayed Delayed sweep sweep to observe is not used. details, Digital mode provides better light output. OTHER CRITERIA Need to see pretrigger Not possible Up to one screen information...
Page 56 HOW TO USE THE INSTRUMENT 4 - 11 STANDARD SETTING Simultaneously press the STATUS and TEXT OFF keys. Connect the Probe Adjust signal to channel 1. The Probe Adjust signal, now supplied to the input, is a square wave with a lower level of 0V and a top level of 600 mV.
Page 57 4 - 12 HOW TO USE THE INSTRUMENT TRACE STORAGE RUN/STOP The digital mode offers a set of powerful features. One of the most important advantages is that you can store one or more traces in memory or on screen. Press the RUN/STOP key to stop the signal acquisition and freeze the display on the screen.
Page 58: Vertical Deflection
HOW TO USE THE INSTRUMENT 4 - 13 4.4 VERTICAL DEFLECTION VERT MENU AVERAGE The section shown on the left contains all direct vertical deflection controlls for the input TRIG1 TRIG2 channels 1 and 2. AUTO AUTO Refer to Section 4.1 for the differences AMPL AMPL RANGE...
Page 59 4 - 14 HOW TO USE THE INSTRUMENT VERTICAL COUPLING AC, DC, GND The input coupling after AUTOSET is ac. Since the Probe Adjust signal is a pulse type signal with a 50% duty cycle, its mean value is at the signal’s 50% amplitude level.
Page 60 HOW TO USE THE INSTRUMENT 4 - 15 VERTICAL POSITION Use the POS control to adjust the ground level to any desired vertical position on the screen. ST6158 9303 MAT4171 Use the position control to position the line in the middle of the screen. Observe that the channel identifier ’1-’...
Page 61: Vertical Amplitude
4 - 16 HOW TO USE THE INSTRUMENT VERTICAL AMPLITUDE Press the upper key of the AMPL keys AMPL Pressing the upper key increases the amplitude of the displayed waveform. As the amplitude of the displayed waveform changes, the screen readout of the input sensitivity changes as well. If you adjust the displayed amplitude to 6 divisions, you will notice that the readout in the lower left hand corner of the screen reads 100 mV/div.
Page 62 HOW TO USE THE INSTRUMENT 4 - 17 VERTICAL AUTO RANGE AUTO The AUTO RANGE function results in an amplitude display of 2 to 6 RANGE divisions. Press the AUTO RANGE key. Observe that the amplitude of the signal changes from 6 divisions to 3 divisions. In the upper right corner of the display ATT 1 is displayed.
Page 63 4 - 18 HOW TO USE THE INSTRUMENT VERTICAL CH1+CH2 Using two probes, connect the Probe Adjust signal to Ch1 and Ch2. Press AUTOSET. Both Ch1 and Ch2 are now displayed. Adjust POS and AMPL to get a display as illustrated on the left below. Press the CH1+CH2 key.
Page 64 HOW TO USE THE INSTRUMENT 4 - 19 VERTICAL INVERT The INVERT function in Channel 2 can be used to make it easier to do out-of- phase signal comparisons. The most common use of the INVERT function is to obtain the display or make the acquisition of the voltage difference between two channels.
Page 65 4 - 20 HOW TO USE THE INSTRUMENT VERTICAL MENU BANDWIDTH LIMITER The Bandwidth Limiter reduces the bandwidth of the vertical channels to 20 MHz. This is done by activating a filter in the vertical channels. This feature can be used both in analog mode and in digital mode to suppress high frequency noise.
Page 66 At the same time, the sensitivity readout is adjusted automatically detector when a 10:1 or 100:1 probe is used. This way you don’t have to ST6021 multiply the displayed amplitude by 10 or 100 when you use a Fluke probe with range indication.
Page 67: Horizontal Deflection And Triggering
4 - 22 HOW TO USE THE INSTRUMENT 4.5 HORIZONTAL DEFLECTION AND TRIGGERING Before starting with the horizontal deflection functions, you must set the instrument to a predefined state to create a correct start situation. STANDARD SETTING Simultaneously press the STATUS and TEXT OFF keys. Connect the Probe Adjust signal to channel 1.
Page 68 HOW TO USE THE INSTRUMENT 4 - 23 TIMEBASE AUTO RANGE AUTO The AUTO RANGE function continuously adjusts the timebase to a RANGE display of 2 to 6 waveform periods. Press the AUTO RANGE key. Observe that the timebase of the signal display changes to display 2 to 6 signal periods.
Page 69 4 - 24 HOW TO USE THE INSTRUMENT TIMEBASE MAGNIFY The displayed signal can be expanded horizontally so that more MAGNIFY signal detail becomes visible. In the analog mode, a magnification is possible and the entire sweep length can be made ST6711 visible by turning the X POS control.
Page 70 HOW TO USE THE INSTRUMENT 4 - 25 TIMEBASE X POS X POS With X POS the displayed signal is shifted horizontally across the display. Turn the X POS control clockwise. X POS MAT4199 Observe that a bar graph ( ) is displayed.The block on the bar graph shows which part of the digital trace is displayed as expanded.
Page 71: Trigger Source
4 - 26 HOW TO USE THE INSTRUMENT TRIGGER SOURCE Press the TRIG 2 key in the CH2 section of the front panel to select channel 2 as trigger source. The indication in the lower right hand readout area of the screen now displays ’ch2’. Observe that the signal is not triggered.
Page 72 HOW TO USE THE INSTRUMENT 4 - 27 TRIGGER TRIGGER LEVEL TRIGGER After each AUTOSET, the trigger level is always clamped within the LEVEL signal amplitude range to assure stable triggering on most signals. The trigger level is adjustable, but it is limited between the minimum (-100%) and the maximum (+100%) amplitude levels of the signal.
Page 73 4 - 28 HOW TO USE THE INSTRUMENT TRIGGER TRIGGER POSITION TRIGGER Press the ANALOG key to select the digital mode. POSITION Turn the TRIGGER POSITION control counterclockwise. One of the outstanding capabilities of a Digital Storage Oscilloscope is the ability to capture and display signal details before the trigger moment.
Page 74 HOW TO USE THE INSTRUMENT 4 - 29 TRIGGER SINGLE SHOT Make sure the instrument is in the Digital Mode. Press AUTOSET. This sets up the scope with the proper amplitude and timebase settings. Remove the probe tip from the Probe Adjust output. Turn the TRIGGER POSITION to mid-screen (counterclockwise).
Page 75: Digital Acquisition And Storage
4 - 30 HOW TO USE THE INSTRUMENT 4.6 DIGITAL ACQUISITION AND STORAGE This section gives you a short introduction to digital acquisition and storage in order to provide the basic knowledge and terms. This information is necessary for you to understand all digital statements in the following sections of the manual. ANALOG: INPUT DISPLAY...
Page 76: Advanced Vertical Functions
HOW TO USE THE INSTRUMENT 4 - 31 4.7 ADVANCED VERTICAL FUNCTIONS All basic functions of the oscilloscope are accessible via direct action front panel keys. More advanced functions are easily accessible via the menus behind the menu initialization keys (keys with their function name in blue text). STANDARD SETTING Before continuing with the advanced vertical functions, you must set the instrument to a predefined state to ensure a correct start situation.
Page 77 4 - 32 HOW TO USE THE INSTRUMENT ACQUIRE AVERAGE The average function averages the input data over a number of successive acquisitions. The average function is used to reduce the influence of random noise in the input signal. There is no loss of bandwidth when the average function is activated, but the signal must be repetitive.
Page 78 HOW TO USE THE INSTRUMENT 4 - 33 ACQUIRE ENVELOPE The ENVELOPE mode records the minimum and the maximum of the signal over a number of acquisitions. Press the ACQUIRE key. Press the ’ENVELOPE’ softkey to turn it on. ENVELOPE ST6480 The AVERAGE mode and the ENVELOPE modes are mutually exclusive.
Page 79: Advanced Horizontal And Trigger Functions
4 - 34 HOW TO USE THE INSTRUMENT 4.8 ADVANCED HORIZONTAL AND TRIGGER FUNCTIONS All basic timebase and trigger functions of the oscilloscope are accessible via direct action front panel keys. More advanced functions are easily accessible via the menus behind the menu initialization keys (keys with the function in blue text). STANDARD SETTING Before continuing with the advanced functions, you must set the instrument to a predefined state to ensure a correct start situation.
Page 80 HOW TO USE THE INSTRUMENT 4 - 35 TRIGGER LEVEL Press the ’level-pp’ softkey to turn it off. The automatic level detection circuitry is turned off. The trigger level is TRIGGER LEVEL no longer clamped within the peak-peak range of the signal. You must adjust the proper trigger level.
Page 81 4 - 36 HOW TO USE THE INSTRUMENT TRIGGER MODE TRIGGERED Press the TB MODE key. TB MODE In the screen, the timebase mode (TB MODE) menu appears. ’auto’ is intensified. With the "auto" mode turned on, the timebase will run free as soon as no triggering signal is detected, in order to provide a base line.
Page 82 HOW TO USE THE INSTRUMENT 4 - 37 TRIGGER MODE ROLL Press the ANALOG key to select the digital mode. Press the TB Mode key to enter the TB mode menu The TB MODE menu is extended with extensive timebase modes. The differences are as follows: •...
Page 83 4 - 38 HOW TO USE THE INSTRUMENT TRIGGER LINE Connect a sine-wave signal of 4 V/300 Hz to channel 1. Simultaneously press the STATUS and TEXT OFF keys. Press AUTOSET. Select a timebase speed of 1 ms/div. Press the TRIGGER key. Press the softkey next to the function ’ch1 line’...
Page 84: Memory Functions
HOW TO USE THE INSTRUMENT 4 - 39 4.9 MEMORY FUNCTIONS The next section deals with storing and recalling traces in memory for later use. Functions related to trace storage and recall are easily accessible via the menus selection keys labeled ’SAVE" and ’RECALL’. STANDARD SETTING Before continuing with the memory functions, you must first set the instrument to the default setting to ensure a correct start situation.
Page 85 4 - 40 HOW TO USE THE INSTRUMENT TRACE STORAGE SAVE Turn the TRACK control to select the memory location in which to store the trace data. Observe that eight memory locations ’m1 to m8’ (or 50 memory locations when extended memory is installed) scroll through the menu.
Page 86 HOW TO USE THE INSTRUMENT 4 - 41 TRACE STORAGE COPY A trace can be copied from one memory location to another. Press the ’COPY’ softkey. The ’COPY MEMORY’ is now displayed. The source (’FROM’) and destination (’TO’) memory locations can be selected in this submenu. Turn the TRACK control to select ’m3’...
Page 87 4 - 42 HOW TO USE THE INSTRUMENT TRACE STORAGE RECALL RECALL If you completed all of the previous steps, three memory locations are occupied by trace information. You can display these stored traces at any time and in any combination. Press the RECALL key.
Page 88 HOW TO USE THE INSTRUMENT 4 - 43 TRACE STORAGE SAVING MULTIPLE TRACES Each memory location can store two channels. Connect the probe to channel 1. Press AUTOSET. Switch on channel 2. Turn the channel 2 POS control counterclockwise. The upper trace displays the signal of channel 1, and the lower line represents channel 2.
Page 89: Cursors Functions
4 - 44 HOW TO USE THE INSTRUMENT 4.10 CURSORS FUNCTIONS Cursors are provided to make fast and accurate amplitude CURSORS TRACK and time measurements. These can be done in digital mode as well as in analog mode. ST6171 9303 The analog mode of the oscilloscope is often used to accurately display complex waveforms, such as in AM, FM, and Video.
Page 90 HOW TO USE THE INSTRUMENT 4 - 45 CURSORS ON/OFF There are two sets of cursors : amplitude cursors and time cursors. Amplitude cursors are two horizontal lines, and Time cursors are two vertical lines. The dashed lines are referred to as reference cursors and the dotted lines are referred to as delta ( ) cursors.
Page 91 4 - 46 HOW TO USE THE INSTRUMENT CURSORS VOLT Use the softkeys, to select the amplitude cursors (’=’ intensified). Two amplitude cursors will appear in the display. The menu permits the channel to be selected for which the amplitude cursors apply.
Page 92 HOW TO USE THE INSTRUMENT 4 - 47 CURSORS READOUT Press the softkey next to ’READOUT’. CURSORS READOUT T 1/ T The ’CURSOR READOUT’ T-ratio T-trg selection menu for horizontal and vertical measurements is now V1&V2 displayed. You can make the V-ratio following selections from this menu: ch1: T= 460s V= 600mV...
Page 93 4 - 48 HOW TO USE THE INSTRUMENT CURSORS READOUT T-RATIO/PHASE First, the reference distance between the two cursors is set. This then is set to 100 % (360 ) by pressing the T=100 % (360 ) softkey. Changing the distance between the cursors now results in a % ( ) reading of the reference.
Page 94: Measurement Functions
HOW TO USE THE INSTRUMENT 4 - 49 4.11 MEASUREMENT FUNCTIONS When operating in the analog mode, you can use the cursors to measure amplitude and time data. When operating in the digital mode, the scope has an extensive set of fully automated amplitude and time measurement functions.
Page 95 4 - 50 HOW TO USE THE INSTRUMENT MEASURE MEAS1-PKPK MEASURE Press the ANALOG key to select the digital mode. Press the MEASURE key. The displayed menu gives access to the two measurements MEAS 1 and MEAS 2. Each measurement can be independently turned on and off. In this menu, you can select the measurement in MEAS 1 and MEAS 2 function.
Page 96 HOW TO USE THE INSTRUMENT 4 - 51 MEASURE MEAS 2-FREQ Press the ’RETURN’ softkey to return to the ’MEASURE’ menu. Turn on MEAS 2. MEAS 2 performs a frequency measurement on the same signal. The screen displays this result as : ’ch1 freq= ..kHz’. Remove the Probe Adjust signal from channel 1 Because of the absence of an input signal, no frequency can be measured.
Page 97 4 - 52 HOW TO USE THE INSTRUMENT MEASURE CURSOR LIMIT With cursor limited measurements it is possible to perform measurements on a part of the waveform. Press the softkey next to CURSOR LIMIT& STATIST. Set CURSOR LIMITED to ’yes’. Turn the control to reduce the area between the cursors.
Page 98 HOW TO USE THE INSTRUMENT 4 - 53 MEASURE TOUCH, HOLD & MEASURE ™ The probes delivered with the oscilloscope offer a unique and innovative way to perform a number of functions directly from a push button mounted on the side of the probe.
Page 99: Processing Functions
4 - 54 HOW TO USE THE INSTRUMENT 4.12 PROCESSING FUNCTIONS MATH Most oscilloscopes, including most Digital Storage Oscilloscopes, limit their capabilities to the display of amplitude (in volts), versus time. In addition to those traditional oscilloscope functions, this range offers capabilities to mathematically change the contents of each memory location.
Page 100 HOW TO USE THE INSTRUMENT 4 - 55 MATHEMATICS FILTER Press the ANALOG key to select the digital mode. Press the MATH menu key. The MATH menu is displayed on the screen. Observe that MATH 1 is the default. Press the softkey next to MATH 1 to enter the MATH 1 submenu. This menu is used to select one of the four mathematic functions: ’add, sub, mul, filter’.
Page 101 4 - 56 HOW TO USE THE INSTRUMENT MATHEMATICS MULTIPLY You can activate a second process MATH 2. This way, two processes can run at the same time. Connect the Probe Adjust signal to channel 1 and channel 2 and turn on both channels.
Page 102: Display Functions
HOW TO USE THE INSTRUMENT 4 - 57 4.13 DISPLAY FUNCTIONS When operating in the analog mode, you can set the scope to display XY displays by selecting ’X DEFLECTION’ mode. In this mode the horizontal deflection is obtained from one of the input signals, while the analog timebase generator is turned off.
Page 103 4 - 58 HOW TO USE THE INSTRUMENT The signal on channel 1 is a square wave. Consequently, there will be only two vertical levels to display. The signal on channel 2 is a sine wave, which is now displayed as a function of the square wave on channel 1. 200mV 1.00V X=ch1...
Page 104 HOW TO USE THE INSTRUMENT 4 - 59 DIGITAL DISPLAY X versus Y Similar to the analog mode, the digital mode allows you to display one trace as a function of another. The source for vertical direction (Y) is selected by the TRACK control. It can be the acquired trace or a saved track in a memory location (e.g., m3).
Page 105 4 - 60 HOW TO USE THE INSTRUMENT DIGITAL DISPLAY VERT MAGNIFY In the digital mode, the displayed signal can be expanded vertically after it has been captured. This allows you to look to signal details. Please note that the magnified representation of the signal has the same resolution as the originally acquired signal.
Page 106 HOW TO USE THE INSTRUMENT 4 - 61 DIGITAL DISPLAY INTERPOLATION Interpolation is a mathematical way to calculate displayed dots between actually captured signal samples. Interpolated displays help in the recognition of trace waveforms, even when the number of samples is too low to render an accurate representation of the signal.
Page 107 4 - 62 HOW TO USE THE INSTRUMENT DIGITAL DISPLAY WINDOWS Connect the Probe Adjust signal to channels 1 and 2. Press AUTOSET. The screen displays the two Probe Adjust signals in the center of the screen. Press the TEXT OFF key, to turn off the bottom text.
Page 108: Delayed Timebase
HOW TO USE THE INSTRUMENT 4 - 63 4.14 DELAYED TIMEBASE The Delayed Timebase (DEL’DTB) has two basic DELAY DELAYED TIME BASE functions: TIME/DIV ST6719 9303 • To magnify and display any detail of the signal displayed with the main timebase.
Page 109 4 - 64 HOW TO USE THE INSTRUMENT DELAYED TIMEBASE DELAY Use the DELAY control to select the start of intensified part of the signal in the upper trace. The intensified part acts like a window over the Main Timebase trace. DELAY MTB 1.00ms MTB 1.00ms...
Page 110 HOW TO USE THE INSTRUMENT 4 - 65 DELAYED TIMEBASE TRACE SEP The traces displayed by the Main Timebase and Delayed Timebase can be separated with TRACE SEP. If the DELAYED TIMEBASE menu is activated, you will see the symbol next to the TRACE SEP text.
Page 111 4 - 66 HOW TO USE THE INSTRUMENT The third softkey in the menu is labeled ’starts/trig’d’. ’Starts’ is highlighted as default. This is an indication that the Delayed Timebase starts immediately after the delay time has passed. For most signals, the ’starts’ mode can be used. Press the softkey to select the TRIG’D mode.
Page 112 HOW TO USE THE INSTRUMENT 4 - 67 DELAYED TIMEBASE TRIGGER LEVEL Just as is the case for Main Timebase triggering, proper triggering of the Delayed Timebase depends on the selection of the proper trigger level. symbol in the Delayed Timebase trigger menu indicates the control to be used to adjust the trigger level.
Page 113: Hard Copy Facilities
4 - 68 HOW TO USE THE INSTRUMENT 4.15 HARD COPY FACILITIES The oscilloscope offers the capabilities to make a hard copy of the screen information on a printer or a plotter. The hard copy can include the recorded waveform(s), the relevant scope settings, trace identification, cursors, measurement results and screen graticule.
Page 114 HOW TO USE THE INSTRUMENT 4 - 69 UTILITY PRINT SETUP The oscilloscope must first be set to the correct interface parameters. Your instrument is always equipped with an RS 232 interface as standard. The following procedure describes how to set up the oscilloscope to use a printer through the RS 232 interface.
Page 115 4 - 70 HOW TO USE THE INSTRUMENT The preceding section describes the setup of a printer using the RS 232 interface. If you wish to use an IEEE-488 equipped printer, all steps are the same, except for the RS 232 setup. 9303 UTILITY PLOT SETUP...
Page 116: Autoset And Setup Utilities
HOW TO USE THE INSTRUMENT 4 - 71 4.16 AUTOSET AND SETUP UTILITIES This oscilloscope has a number of utilities that assist you to quickly get to the setup you need. One utility is the SET STANDARD utility to set the oscilloscope to a factory- defined, known state.
Page 117 4 - 72 HOW TO USE THE INSTRUMENT AUTOSET USER PROGRAMMABLE The AUTOSET function can also be programmed so that certain functions switch to a predefined position after an AUTOSET. USERPROG allows the user to customize the AUTOSET function for specific applications.
Page 118 HOW TO USE THE INSTRUMENT 4 - 73 This setup can be saved in memory as follows: Turn the TRACK control until memory location ’s7’ is selected. Press the softkey ’save’. FRONTS recall The actual setting of the front is now stored in memory location undo ’s7’.
Page 119 4 - 74 HOW TO USE THE INSTRUMENT SETUP TEXT LABEL In the setup menu each stored setups can be given a label of user defined text. This is done in the submenu TEXT of the SETUP menu. The cursor controls are used for editing text.
Page 120: Other Features
Fluke is in the process of constantly improving products and documentation. For any problems or suggestions, please contact the Fluke Service Center nearest you. A complete listing of addresses for the Fluke Service Centers can be found in the Reference Manual.
Page 121: Function Reference
FUNCTION REFERENCE 5 - 1 5 FUNCTION REFERENCE This chapter contains an alphabetized description of each oscilloscope function. For easy reference, the functions are organized in the following order: 1. The Function description Explanation and detailed information about the function. 2.
Page 122 5 - 2 FUNCTION REFERENCE ACQUISITION LENGTH Description: The oscilloscope allows the user to select the acquisition length, or record length that best suits the needs of the application. The default acquisition length is 512 data points for each trace. It is possible to increase the length of a trace from 512 points up to a maximum 8K points (or 32K points if the memory expansion option is installed).
Page 123 FUNCTION REFERENCE 5 - 3 MEMORY EXPANSION With the Extended Memory Option installed, the acquisition memory can be made as long as 32K. When shorter acquisitions are selected, more traces can be stored in memory with a maximum of 208 (156) traces. Acquisition Reference memory Traces...
Page 124: Add Invert Subtract
5 - 4 FUNCTION REFERENCE ADD INVERT SUBTRACT Description: The CH1 + CH2 (CH3 + CH4) key in the control section for CH1 (CH3) can be used to display additional traces of the sums of these channels. CH3 + CH4 is only present in the 4 channels models.
Page 125 FUNCTION REFERENCE 5 - 5 ADD (MATHEMATICS) Description: The ADD function performs a point-to-point addition of two traces, related to the two ground levels (indicated as ‘-’). The result of the ADD function is a new trace in a different register. This trace can be scaled and positioned. Scaling is the correction of the resultant trace to fit in the screen.
Page 126 5 - 6 FUNCTION REFERENCE Key sequence: substract multiply filter MATH MATH1(2) Control to select the ADD process. Control to select the first source trace. Control to select the second source trace. on off Toggle softkey to switch the ADD function on.
Page 127 FUNCTION REFERENCE 5 - 7 ALT/CHOP Description: In the analog mode, when two or more channels are selected, the oscilloscope displays multiple channels in a ‘time shared’ mode. This implies that a fast electronic switch connects each input signal to the output amplifier in turn. This can be done at the end of every sweep, or at a high frequency.
Page 128 5 - 8 FUNCTION REFERENCE The alternate and chopped modes are shown in the figures below. ALTERNATE MODE ..MAT4203 CHOPPED MODE ..Key sequence: alt chop TB MODE Toggle softkey to select ALTernate or CHOPped mode. ST6845 9303 ANALOG MODE Description: You can use the yellow ANALOG key to switch from the analog mode to the digital mode and back at any time.
Page 129 FUNCTION REFERENCE 5 - 9 If switching from one mode to another results in an unsatisfactory display, press the yellow key a second time to return to the original situation. Key sequence: ANALOG Toggle key to switch between analog mode and digital mode.
Page 130 5 - 10 FUNCTION REFERENCE AUTOSET Description: The AUTOSET function sets the oscilloscope so that an optimum display of the input signals is obtained within the same mode analog or digital. Operating the AUTOSET key results in: Channels with an input signal are switched on; others are switched off. Input coupling is set to ac;...
Page 131 FUNCTION REFERENCE 5 - 11 AUTOSET SEQUENCE Description: If front panel settings are stored in memory locations ‘s1 to s5’ and ‘s6’ is cleared, then the range of ‘s1 to s5’ becomes a sequence of front panel settings. Such a sequence can be used as (part of) a step-by-step testing procedure.
Page 132 5 - 12 FUNCTION REFERENCE AUTOSET USERPROG Description: A number of instrument settings after AUTOSET can be customized to your special needs when the standard default settings do not fit on your application. The selections are reached via the key sequence ’UTILITY >> AUTOSET >> userprog’.
Page 133 FUNCTION REFERENCE 5 - 13 Key sequence: AUTOSET default userprog setups UTILITY AUTOSET Toggle softkey to activate userprog CHANNELS scan unaffect Toggle softkey to preset channels VERT on/off and input attenuator after AUTOSET. ac dc unaffect Toggle softkey to preset input coupling after AUTOSET unaffect Toggle softkey to preset input...
Page 134 5 - 14 FUNCTION REFERENCE AVERAGE Description: Valid in digital mode only. Averaging is a process to reduce random noise without losing bandwidth. Averaging can only be used for repetitive signals. Every sample point is calculated after every subsequent acquisition as follows: measured previous –...
Page 135 FUNCTION REFERENCE 5 - 15 BANDWIDTH LIMITER Description: The bandwidth limiter cuts the bandwidth of all vertical channels to 20 MHz and makes noisy input signals look smoother. The bandwidth limiter does not affect triggering. The following figure shows the effect of the bandwidth limiter. Effect of bandwidth limiter 20MHz FULL...
Page 136 5 - 16 FUNCTION REFERENCE CALIBRATION AUTOCAL Description: The CAL key is used to make a fine adjustment of the oscilloscope’s input, trigger, and timebase circuitry to achieve high accuracy even under extreme environmental conditions such as very high or very low temperatures. In a workshop or laboratory environment, a fine adjustment once a week or even every month is sufficient.
Page 137: Channel/Trace Selection
FUNCTION REFERENCE 5 - 17 CHANNEL/TRACE SELECTION Description: In this family of instruments, the distinction is made between ‘channel’ and ‘trace’. A channel is referred to as an input channel, complete with AMPL and POS settings. A trace represents a waveform which has been stored in one of the register memories.
Page 138 5 - 18 FUNCTION REFERENCE Key sequence: Key to switch a channel ON or OFF. TRACK RECALL Control to select a register or a trace to be recalled from memory. DISPLAY Toggle softkey to turn the display of the selected trace or register ON or OFF.
Page 139 FUNCTION REFERENCE 5 - 19 CURSORS Description: Cursors are on-screen measuring lines. They can be moved using the TRACK controls. Cursors can be positioned on signal details of interest and can be used for accurate measurements. Basically there are two types of cursors: vertical lines (||) called time cursors and horizontal lines (=) called volt cursors.
Page 140 5 - 20 FUNCTION REFERENCE CURSORS TIME CURSORS The time cursors are used for time measurements. The example shows the required softkey settings for period measurements. The cursor positioning with the TRACK and controls is also ch... T=... shown. READOUT TRACK ST6553 9303...
Page 141 FUNCTION REFERENCE 5 - 21 CURSORS BOTH In this mode, both voltage and CURSORS time cursors are active. The TRACK and controls operate as in VOLT or TIME mode, as selected with the CONTROL key. ch2 T=... V=... CONTROL READOUT TRACK TRACK ST6554...
Page 142 5 - 22 FUNCTION REFERENCE CURSORS READOUT Description: The cursors offer a wide variety of voltage and time readouts. For comparison of signal details the ratio mode is very suitable. When in analog mode time or volt cursors have been selected, only the relevant readouts are displayed in the READOUT menu.
Page 143 FUNCTION REFERENCE 5 - 23 CURSORS READOUT VOLT Three readouts can be selected: V: Gives the voltage difference ch ... : V=100% TRACK between the cursors. V1 V2: Gives the absolute voltage with respect to ground for each cursor. V1 and V2 have to be selected separately.
Page 144 5 - 24 FUNCTION REFERENCE DELAY Description: Delay is the term that is used to define the time difference between the trigger point of an acquisition and the starting point of the resulting trace. In an analog oscilloscope, the trigger point is at the beginning of a trace, and the delay is said to be zero.
Page 145 FUNCTION REFERENCE 5 - 25 Every time the signal crosses this level the event counter is incremented by one. When the event counter reaches the selected delay value, the scope triggers and a new signal acquisition is started. The number of events to be counted before the acquisition starts is selected by using the control in the EVENT DELAY sub menu.
Page 146 5 - 26 FUNCTION REFERENCE DELAY MEASUREMENT Description: In the digital mode, the MEASURE menu provides a ‘delay’ measurement. This is an automatic measurement of the time between two 50% levels ("mesials") of the first leading or trailing edge of two signals. The menu is reached with the key sequence ‘MEASURE >>...
Page 147 FUNCTION REFERENCE 5 - 27 Key sequence: delay Toggle softkey to select the delay measurement in MEASURE MEAS1(2) menu DELAY 1 or DELAY 2. TRACK Control to select the reference waveform. Toggle softkey to select the slope of the reference waveform.
Page 148 5 - 28 FUNCTION REFERENCE In the DELAYED TIMEBASE menu, which is selected with the DTB key, the delayed timebase can be switched on. This is done with the first softkey called ‘DEL’D TB on/off’. Once activated, the delayed timebase trace is displayed. The main timebase trace can be switched off using the ‘MAIN TB on/off’...
Page 149 FUNCTION REFERENCE 5 - 29 DIGITAL MODE Description: The yellow ANALOG key is used to switch from the analog mode to the digital mode and back at any time. The signal acquisition and display functions of both operating modes are very similar. However, the nature of the signal used or the choice of the measurement may determine when it is best to use the digital mode.
Page 150 5 - 30 FUNCTION REFERENCE DISPLAY MENU Description: The DISPLAY menu offers a set of powerful display functions for the analog mode and the digital mode. In the analog mode, the scope can be set to the X DEFLECTION mode. In this mode XY displays can be generated from a combination of any of the input channels for X and Y, while the analog timebase generator is turned off.
Page 151 FUNCTION REFERENCE 5 - 31 Horizontal source selection is made with softkeys. X and Y sources must always be traces from the same register memory. This is done to avoid errors because the traces have to be sampled simultaneously to give a useful and correct X vs Y display. The TEXT submenu allows you to display ‘user text’...
Page 152 5 - 32 FUNCTION REFERENCE on off DISPLAY X vs Y Softkey to select the X vs Y mode, see function X-DEFLECTION (in digital mode only). TRACK Control to select the Y source. X SOURCE Softkey to select the X source. ST6785 9303 TRIG IND...
Page 153 FUNCTION REFERENCE 5 - 33 ENVELOPE Description: If a waveform is changing over time (because of drift, jitter, or intermittent faults), the ‘history’ of the changing waveform can be collected using the envelope mode. In the envelope mode the minimum and maximum signal values are stored, taking the values of a large number of successive waveform acquisitions.
Page 154 5 - 34 FUNCTION REFERENCE EXTERNAL TRIGGER (2 CHANNELS MODELS ONLY) Description: The External Trigger input provides an extra input that can be used as the trigger source for the Main Time Base (MTB). The External Trigger input chargacteristics are simular to those of the input channels 1 and 2.
Page 155 FUNCTION REFERENCE 5 - 35 FILTER Description: The FILTER function is a waveform MATH function. It is a post- acquisition algorithm which can be used to simulate the effect of a low-pass filter process on a trace. The cut-off frequency of the low-pass filter can be adjusted and the result trace is stored as a new trace in a separate register.
Page 156: Glitch Trigger
5 - 36 FUNCTION REFERENCE Key sequence: TRACK MATH MATH1(2) Control to select the filter function from the MATH 1 or MATH 2 menu. Control to select the source signal. on off Toggle key to switch selected function on or off. TRACK PARAM Control to select the number of samples for the filter...
Page 157 FUNCTION REFERENCE 5 - 37 Key sequence: Toggle key to select positive or negative glitch detection. Toggle softkey to select positive or negative glitch detection. Softkey pair to select the additional trigger condition. Control to adjust the conditional time or the beginning of the range.
Page 158 5 - 38 FUNCTION REFERENCE SIGNAL TRIG TRIG TRIG SWEEP HOLD OFF HOLD OFF HOLD OFF (no triggers (no triggers (no triggers accepted) accepted) accepted) WAVEFORM ON SCREEN SIGNAL TRIG TRIG TRIG SWEEP HOLD OFF HOLD OFF HOLD OFF WAVEFORM ON SCREEN (DOUBLE TRIGGERING)
Page 159 FUNCTION REFERENCE 5 - 39 INPUT ATTENUATOR MANUAL + AUTOMATIC Description: The oscilloscope’s input has a wide range of sensitivities. This enables signals of different amplitudes to be displayed on the available screen area. Sensitivity adjustment is done with key pair AMPL/VAR or a single AMPL toggle key (for the External Trigger input).
Page 160 5 - 40 FUNCTION REFERENCE AUTO Toggle key to switch the AUTO RANGE function on/off RANGE AMPL Toggle key to switch between two vertical input sensitivities of the External Trigger input channel. INPUT COUPLING Description: The characteristics of the oscilloscope’s inputs can be selected for each channel. A channel can be switched on/off with the toggle key ON.
Page 161 FUNCTION REFERENCE 5 - 41 Key sequence: Toggle key to switch a channel on/off. TRIG VIEW Toggle key to switch the display of the External Trigger signal on/off. AC/DC/GND Toggle key for vertical input coupling of the input channels. AC/DC Toggle key for vertical input coupling of the External Trigger input.
Page 162 5 - 42 FUNCTION REFERENCE LOGIC TRIGGER (4 CHANNELS MODELS ONLY) Description: Logic triggering enables triggering on a combination of the four input signals. Each input is compared with a trigger level and is recognized as being either HIGHer or LOWer than the trigger level. The four input signals together can be regarded to be a 4-bit digital ‘word’.
Page 163 FUNCTION REFERENCE 5 - 43 The time condition can be set in the softkey menu. enter triggers when the pattern becomes true. exit triggers when the pattern changes from true to false. if>t1 triggers when the pattern is true and its duration exceeds a specified time.
Page 164 5 - 44 FUNCTION REFERENCE MAGNIFY HORIZONTAL Description: In the analog mode, the MAGNIFY key pair switches between the normal trace and horizontal expansion of the trace by a factor of 10. The maximum timebase speed is then increased from 20 ns/div to 2 ns/div. In the digital mode, the same MAGNIFY key pair gives horizontal expansion of x1, x2, x4 up to 32 times for detailed viewing of captured signals.
Page 165 FUNCTION REFERENCE 5 - 45 Key sequence: Key pair to adjust the horizontal magnification. MAGNIFY Analog mode: Right side switches x10 MAGNIFY on. Left side switched x10 MAGNIFY off. ST6711 Digital mode: Right side increases the MAGNIFY factor. Left side decreases the MAGNIFY factor. MAGNIFY VERTICAL Description: In the digital mode the displayed signal(s) can be expanded vertically up to 32...
Page 166 5 - 46 FUNCTION REFERENCE MAIN TIMEBASE MANUAL + AUTOMATIC Description: The Main Timebase (MAIN TB) has a wide range of time/div settings. This enables the display of signals of various frequencies to be displayed with optimum resolution. The time scale is adjusted with the key pair TIME/DIV (VAR). Adjustment can be done in steps or in a continuous range (VAR).
Page 167 FUNCTION REFERENCE 5 - 47 MATHEMATICS Description: Two mathematical functions (MATH 1 and MATH 2) are independent waveform processes. These can be used separately, or be chained together if required. Each offers a choice of four mathematical functions (add, subtract, multiply, filter). The result of each function is always placed in a separate register.
Page 168 5 - 48 FUNCTION REFERENCE The following measurements are available: volt: dc, rms, min peak, max peak, pk-pk, low level, high level, overshoot (positive and negative), preshoot (positive and negative) time: frequency, period, pulse width, rise time, fall time, duty cycle delay: channel to channel on leading or trailing edges Refer to the functions TIME MEASUREMENT, VOLT MEASUREMENT, and...
Page 169 FUNCTION REFERENCE 5 - 49 3. Calculate all other signal parameters. The formulas for all time and volt measurements are given in the sections for DELAY MEASUREMENT, TIME MEASUREMENT, and VOLT MEASUREMENT. The HISTOGRAM method determines the voltage levels. This method is as follows: The input data (= trace) is used to create a histogram.
Page 170 5 - 50 FUNCTION REFERENCE Newly acquired traces or previously stored traces can be used as source for this process and can be selected with the control. The resulting trace is automatically written in a register memory (m1 for math1 or m2 for math2). To see the result more clearly, use the ‘DISPLAY SOURCE on/off’...
Page 171 FUNCTION REFERENCE 5 - 51 PEAK DETECTION Description: This function is available only in the digital mode. In the acquisition system of a Digital Storage Oscilloscope, the sample distance is determined by the time base speed. At higher time base speeds, the distance between the samples is short;...
Page 172 5 - 52 FUNCTION REFERENCE See the function ACQUISITION LENGTH for additional information SIGNAL DETAIL MAX SAMPLE RATE EFFECTIVE SAMPLES GLITCH OFF EFFECTIVE SAMPLES GLITCH ON 1 SAMPLE PERIOD ST6660 Key sequence: PEAK DET ACQUIRE Toggle key to switch the peak detection on/off. ST6760 9303 POSITION...
Page 173: Printing And Plotting
FUNCTION REFERENCE 5 - 53 POWER SUPPLY Description: The instrument can be used at any nominal line voltage between 100 Vac and 240 Vac, with no switching and no fuse changes. After the instrument is turned on by pressing the POWER ON/OFF switch, an automatic power-up test is started. For detailed information, refer to the ’CONFIDENCE CHECK’...
Page 174 5 - 54 FUNCTION REFERENCE Interface The instrument is equipped with an RS-232 Interface as standard. This interface can be used with an RS-232 printer or plotter. The IEEE 488.2 Interface is available as factory installable option. This interface can be used with IEEE-488 compatible printers or plotters. For correct functioning, correct interface parameters must be set.
Page 175 FUNCTION REFERENCE 5 - 55 Real-time clock The real-time clock is used to make time stamps on a hardcopy. Hardcopies will be stamped with two timestamps: the time of operation of the HARD COPY key and the time of trigger of the acquisition. Adjust block Three softkeys are used to adjust the clock.
Page 176 5 - 56 FUNCTION REFERENCE print PRINT& plot clk UTILITY PLOT&CLK Toggle softkey to select printer, plot, or clock menu. 30:11:93 16:17:00 Toggle softkey to select the clock (time stamp) to be adjusted with the up/down softkey pair. Up/down softkey pair to adjust the time. dd:mm:yy mm:dd:yy yy:mm:dd...
Page 177 AUTOSET, performing a TOUCH, HOLD & MEASURE™, selecting the next setup or switching between analog and digital mode. For non-Fluke probes or probes without an indication ring, the attenuation factor can be programmed. As a result, the combined input sensitivity of the probe and oscilloscope is given in the readout area.
Page 178 5 - 58 FUNCTION REFERENCE REMOTE CONTROL IEEE 488.2 Description: An IEEE 488.2 Interface is available as an option. This interface can be used to control oscilloscope functions by an external computer. All of the oscilloscope’s current settings can be read by the computer. The programming language is called SCPI (Standard Commands for Programmable Instruments).
Page 179 FUNCTION REFERENCE 5 - 59 REMOTE CONTROL RS-232 Description: The oscilloscope is equipped with an RS-232 Interface as standard. This can be used for remote control or for setting the readout using an external controller or PC. The language used is called CPL (Compact Programming Language) and is described in Chapter 6.
Page 180 5 - 60 FUNCTION REFERENCE Key sequence: WITH IEEE: REMOTE RS232 UTILITY SETUP SETUP RS232 TRACK SETUP Control to adjust baud rate. NO IEEE BITS Toggle softkey to select number of databits. PARITY no odd even Toggle softkey to select parity. 3 wire 7 wire Toggle softkey to select hardware...
Page 181 FUNCTION REFERENCE 5 - 61 RUN/STOP Description: The RUN/STOP button operates in the digital mode only. When the STOP function is active, any new signal acquisition is stopped and the trace is ‘frozen’. The status of the STOP function is displayed in the bottom right side of the screen. With the acquisitions STOPped, the following actions are still possible: Plot actions Display changes (also Y POS)
Page 182: Screen Controls And Graticule
5 - 62 FUNCTION REFERENCE SCREEN CONTROLS AND GRATICULE Description: The screen controls are located to the left of the CRT viewing area. Brightness of trace(s) and text can be adjusted separately with the TRACE INTENSITY and TEXT INTENSITY controls. Intensity of the trace(s) can also be determined by a voltage applied to the rear panel socket Z MOD.
Page 183: Screen Messages
FUNCTION REFERENCE 5 - 63 Key sequence: TRACE INTENSITY Control for trace intensity. TEXT INTENSITY Control for text intensity. TRACE ROTATION Srewdriver operated control to align the trace with the graticule FOCUS Control for focusing of trace, text and cursors. GRATICULE ILLUMINATION Control for illumination intensity of measuring graticule...
Page 184 5 - 64 FUNCTION REFERENCE AUTO SETTING (USERPROGRAM) Indicates that instrument performs an userprogrammed autoset. Function ’AUTOSET USERPROG’. CALIBRATION COMPLETED Autocalibration is completed. Function ’CALIBRATION AUTOCAL’. CALIBRATION ERROR ... Autocal not successfully completed. Function ’CALIBRATION AUTOCAL’. CH. 50 OVERLOAD Input voltage at 50 input impedance is too high.
Page 185 FUNCTION REFERENCE 5 - 65 NO DTB, ACQ. TOO LONG Del’d TB only possible at acquisition length of 512 sample points. Functions ’ACQUISITION LENGTH’ and ’DEL’D TB’. NO DTB IN ROLL MODE Del’d TB and Roll modes cannot be combined. Function ’DEL’D TB’...
Page 186 5 - 66 FUNCTION REFERENCE REGISTER EMPTY Recalling traces from an empty register is not possible. Protection of an empty register is impossible. Function ’RECALL’. REGISTER PROTECTED Register cannot be saved in protected memory location. Function ’SAVE’. REGISTER USED FOR MATH Trace cannot be saved in register M1 or M2, because it is in use for a MATH function.
Page 187: Contents
FUNCTION REFERENCE 5 - 67 save: The actual set of settings is saved in the selected memory location. recall: The settings saved in the selected memory location become the actual settings. undo: The settings previous to the last recall action become active again. CLEAR &...
Page 188: Setups Sequence
5 - 68 FUNCTION REFERENCE SETUPS SEQUENCE Description: If front panel settings are stored in memory locations ‘s1 to s5’ and ‘s6’ is cleared, then the range of ‘s1 to s5’ is referred to as a sequence. Such a sequence can be used as (part of) a step-by-step testing procedure.
Page 189 FUNCTION REFERENCE 5 - 69 STANDARD SETUP / FRONT PANEL RESET Description: A factory-programmed set of default settings is available to put the instrument in a defined state. The default settings (std) are reached in the menu under the SETUPS menu key. Another method to perform a front panel reset is by pressing the STATUS and TEXT OFF keys simultaneously.
Page 190: Status Screen
5 - 70 FUNCTION REFERENCE STATUS SCREEN Description: Normally a maximum of four lines of setting information are given in the lower screen area. More extensive setting information can also be displayed. The STATUS toggle key switches between normal and extensive settings information. The status screen gives the following additional setting readouts: Channel input coupling is indicated by AC, DC, or GND instead of symbols.
Page 191: Subtract (Mathematics)
FUNCTION REFERENCE 5 - 71 SUBTRACT (MATHEMATICS) The subtract mode is available in the digital mode of operation. Description: The SUBTRACT function performs a point-to-point subtraction of two traces. Each point related to the respective ground levels (indicated as ‘-’). The result of the SUBTRACT function is a new trace in a different register.
Page 192: Text Off
5 - 72 FUNCTION REFERENCE Key sequence: substract multiply filter MATH MATH1(2) Control to select the SUBTRACT process. Control to select the first source trace. Control to select the second source trace. on off Toggle softkey to switch the SUBTRACT function on.
Page 193: Timebase Modes
FUNCTION REFERENCE 5 - 73 Key sequence: TEXT OFF Toggle key to cycle through three states of information given in CRT viewing area. TIMEBASE MODES Description: The Main Timebase (MAIN TB) can function in three different modes : AUTO, TRIG, or SINGLE. The choice is mainly determined by the frequency of the trigger signal.
Page 194 5 - 74 FUNCTION REFERENCE MULTI Part of MATH+ option. Refer also to MATH+ Users Manual. The MULTIple shot mode enables a number of single shot acquisitions to be made in rapid succession. It is basically the same as SINGLE but with automatic rearming following each acquisition.
Page 195: Time Measurements
FUNCTION REFERENCE 5 - 75 TIME MEASUREMENTS Description: Time measurements can be made using the cursors or using automated, calculated measurement routines. Cursors operate in the analog mode as well as in the digital mode. Calculated time measurements are available in the digital mode only. Using the cursors, three time interval readouts can be selected: T gives the time interval (seconds) between the cursors.
Page 196 5 - 76 FUNCTION REFERENCE period (PERIOD). Measures the time between the first and third mesial of the signal. At least one complete signal period must be acquired to get a valid measurement. period = time of 3rd mesial - time of 1st mesial pulse (PULSE WIDTH).
Page 197 FUNCTION REFERENCE 5 - 77 Results of the measurements MEAS1 and MEAS2 are displayed in the top left corner of the screen. When you press the key sequence MEASURE >> CURSOR LIMIT & STATIST >> STATIST on, the screen displays three values per MEAS function.
Page 198 5 - 78 FUNCTION REFERENCE TOUCH, HOLD & MEASURE ™ MODE Description: ™ The TOUCH, HOLD & MEASURE. mode is a quick way to freeze the trace and to display four main measurements instantly. This is done by pressing the COMMAND switch on the measuring probe of the required channel.
Page 199: Trigger Coupling
FUNCTION REFERENCE 5 - 79 TRIGGER COUPLING Description: Trigger coupling is used to optimize the trigger stability for different signal types. The filter modes ac and dc are identical to those of the vertical inputs. Refer to function INPUT COUPLING. Lf-reject cuts off lower frequencies;...
Page 200 5 - 80 FUNCTION REFERENCE Key Sequence: ac dc lf-rej Toggle softkey to select MAIN TB trigger coupling modes ac, dc, hf-rej TRIGGER lf-reject, and hf-reject. noise on off Toggle softkey to switch ’noise’ mode for MAIN TB/DEL’D TB. ST6772 9303 ac dc lf-rej...
Page 201: Trigger Del'd Tb
FUNCTION REFERENCE 5 - 81 TRIGGER DEL’D TB Description: The Delayed Timebase has two operating modes: starts and triggered. In both modes the main timebase must be triggered first, and the delay time must have expired. The Del’d Time Base modes are selected in the DELAYED TIMEBASE menu after switching the delayed timebase on.
Page 202 5 - 82 FUNCTION REFERENCE Source and slope are selected with the same TRIG 1, TRIG .., and EXT TRIG keys that are used for the main timebase trigger source and slope selection. The delayed timebase source and slope have their own readout. This readout can be found at the bottom right corner of the screen, below the readout for the main timebase trigger source and slope.
Page 203 FUNCTION REFERENCE 5 - 83 Leveling in DEL’D TB is adjusted with the control. It is activated in the triggered DEL’D TB mode. The range is from -8 ... +8 divisions. Trigger levels for MAIN TB and DEL’D TB can be displayed. Refer to the description of the UTILITY SCREEN &...
Page 204: Trigger Main Tb
5 - 84 FUNCTION REFERENCE TRIGGER MAIN TB Description: This section deals only with ‘edge’ triggering of the MAIN TB. For TV triggering, Logic triggering or DEL’D TB triggering, refer to the appropriate sections. In the analog mode triggering determines the start point of the MAIN TB sweep. The sweep starts at the moment the signal crosses the trigger level in positive or negative direction.
Page 205 FUNCTION REFERENCE 5 - 85 The MAIN TB trigger settings are selected in the menu under the TRIGGER menu key. The toggle softkey ‘ch...line’ selects the trigger source in combination with the keys TRIG1, TRIG.. and EXT TRIG that give direct front panel access to select the trigger source.
Page 206: Tv Trigger
5 - 86 FUNCTION REFERENCE TV TRIGGER Description: In addition to edge and glitch triggering (explained under TRIGGER MAIN TB), there are extensive video triggering possibilities. These enable stable triggering on video frames and lines from various TV standards. There is no need to adjust the trigger level.
Page 207 FUNCTION REFERENCE 5 - 87 Key sequence: Toggle softkey to switch between edge and tv triggering. In digital mode also glitch triggering. Toggle softkey to switch between TV triggering on field 1, field 2, or line sync pulses. Control to select the line number. Toggle softkey to select between pos(itive) and neg(ative) signal polarity.
Page 208 5 - 88 FUNCTION REFERENCE USERTEXT Description: Two lines of user-definable text can be displayed in the CRT viewing area. The text may be useful as additional information when taking photographs. The selections are reached via the key sequence ’UTILITY >> SCREEN & SOUND >> USERTEXT >>...
Page 209 FUNCTION REFERENCE 5 - 89 UTILITY MAINTENANCE Description: The UTILITY MAINTENANCE menu is used to calibrate the oscilloscope and for repair and testing. Calibration data is protected by a password and by operation of a pinhole switch that can be sealed. Calibration is of vital importance for the instrument’s high accuracy.
Page 210 5 - 90 FUNCTION REFERENCE UTIL MENU Description: The UTIL menu is used to make presettings for instrument settings that do not need to be changed frequently: The operation of the AUTOSET key. For a description, refer to the AUTOSET and AUTOSET USERPROG functions.
Page 211: Utility Screen & Sound
FUNCTION REFERENCE 5 - 91 UTILITY SCREEN & SOUND Description: The UTILITY SCREEN & SOUND menu is used to select on-screen text, trigger and ground level indicators, and user text. Settings for acoustic feedback (beep and click) are set in this menu. The menu can be reached with the key sequence ’UTILITY >>...
Page 212 5 - 92 FUNCTION REFERENCE VOLT MEASUREMENTS Description: Voltage measurements can be made using the cursors or using automated, calculated measurement routines. Cursors operate in the analog mode as well as in the digital mode. Calculated volt measurements are available in the digital mode only. Using the cursors, three voltage readouts can be selected: V gives the voltage difference between the cursors.
Page 213 FUNCTION REFERENCE 5 - 93 rms (ROOT MEAN SQUARE VOLTAGE) Measures the rms value within one period, related to the ground level of the signal. If no full period is present, all input samples are included in the calculation. ------------------ - k j –...
Page 214 5 - 94 FUNCTION REFERENCE oversh (OVERSHOOT) Measures the overshoot (in %), related to the amplitude of the signal. There are two types of overshoot: rising overshoot and falling overshoot (undershoot). max (of 1st rising slope) -high rising oversh = 100% high - low low - min (of 1st falling slope)
Page 215 FUNCTION REFERENCE 5 - 95 Key sequence: volt time delay Toggle softkey to select time measurements in menu MEASURE MEAS1(2) MEAS1 or MEAS2. TRACK Control to choose the volt measurement. Control to select the signal on which the measurement must be done. on off Toggle softkey to switch the measurement on and off.
Page 216 5 - 96 FUNCTION REFERENCE X-DEFLECTION (X-DEFL, X vs Y) Description: X-deflection creates X-Y displays in which one input signal is displayed as function of another. To obtain X-Y displays in the analog mode, the oscilloscope can be set to X-DEFLection mode. In the digital mode a similar function is called X vs Y mode.
Page 217 FUNCTION REFERENCE 5 - 97 Key sequence: Toggle softkey to switch X- Deflection on. Softkey pair to select X-DEFL source. Selection is possible only with X- DEFLection on. DIGITAL MODE: on off DISPLAY X vs Y Toggle softkey to switch X vs Y on. TRACK Control to select the register as source for vertical deflection.
Page 218: The Cpl Protocol
THE CPL PROTOCOL 6 - 1 6 THE CPL PROTOCOL 6.1 INTRODUCTION The oscilloscope can be controlled via the RS-232 serial interface using the Compact Programming Language (CPL) protocol. In this protocol a small but very powerful set of commands is defined. The main characteristics of the CPL protocol: It is kept simple and straightforward and is fully tailored to use simple communication facilities like those of BASIC.
Page 219 6 - 2 THE CPL PROTOCOL There are several IMPLICIT QUERY commands, which means that the oscilloscope will send data back (i.e., respond) to the computer after receiving and executing the command. Acknowledge The <acknowledge> is an automatic response from the oscilloscope to let the computer know that the received command has been executed.
Page 220: Example Program Frame
THE CPL PROTOCOL 6 - 3 6.2 EXAMPLE PROGRAM FRAME In the COMMAND REFERENCE SECTION a very short programming example is given for each command. All examples are written in GW-Basic and able to run on an IBM-compatible PC. The example program expects the oscilloscope to be connected via COM1 port (RS-232) with a RS-232 null modem cable and to be setup at 9600 baud, 8 databits, no parity, 3 wire, xon/xoff = off (Menu UTILITY).
Page 221: Commands In Functional Order
6 - 4 THE CPL PROTOCOL 6.3 COMMANDS IN FUNCTIONAL ORDER group name command Communication Program Communication Setup Auto Setup Default Setup Program Setup Program text Query Setup Query text Recall Setup Save Setup Calibrate States Go to Local Go to Remote Local Lockout Measurement Arm Trigger...
Page 222: Commands In Alphabetical Order
THE CPL PROTOCOL 6 - 5 6.4 COMMANDS IN ALPHABETICAL ORDER command name Auto Setup Arm Trigger Calibrate Default Setup Go to Local Go to Remote IDentification Local Lockout Program Communication Program Setup Program text Program Wavefrom Query Setup Query measurement Query Print Query text Query Wavefrom...
Page 223: Command Reference
6 - 6 THE CPL PROTOCOL 6.5 COMMAND REFERENCE In this section all commands of the CPL protocol available in the oscilloscope are described in alphabetical order. All command descriptions have the same layout: NAME Purpose: Explains the command, its parameters and limitations. Command: Shows the syntax for the programming command.
Page 224 THE CPL PROTOCOL 6 - 7 AUTOSET Purpose: To start the AUTOSET function. With this command the oscilloscope will select the optimum settings (volts, time base, trigger mode, etc.) for the connected signal(s). The AutoSet (AS) command performs the same function as pressing the front panel AUTOSET button.
Page 225 6 - 8 THE CPL PROTOCOL ARM TRIGGER Purpose: Will reset the timebase and rearm the triggering for a new timebase trigger. Issuing this command during a time base sweep will immediately stop the sweep, reset the timebase and rearm the triggering. The Arm Trigger (AT) command performs the same function as pressing the frontpanel SINGLE-ARM’D button.
Page 226 THE CPL PROTOCOL 6 - 9 CALIBRATE Purpose: To start the internal Auto-Calibration procedure. This procedure optimizes the input, trigger and time base circuitry of the oscilloscope. This calibration takes approximately one minute and completion is signalled by the acknowledge. The Calibrate (CL) command performs the same function as pressing the front panel CAL button for more than 2 seconds.
Page 227 6 - 10 THE CPL PROTOCOL DEFAULT SETUP Purpose: Sets the oscilloscope to the default setup conditions. The Default Setup (DS) command performs the same function as pressing the TEXT OFF and STATUS/LOCAL buttons simultaneously. The communication interface parameters will not be changed. Command: "DS"...
Page 228 THE CPL PROTOCOL 6 - 11 GO to LOCAL Purpose: Puts the oscilloscope in the Local State. In the Local State, all oscilloscope functions are accessible via the front panel buttons and knobs. The Go to Local (GL) command performs the same function as pressing the STATUS/LOCAL key on the front panel of the oscilloscope, when the oscilloscope is in the Remote State (Refer also to "Go to Remote"...
Page 229 6 - 12 THE CPL PROTOCOL GO to REMOTE Purpose: Puts the oscilloscope in the Remote State. In the Remote State none of the oscilloscope functions are accessible via the front panel buttons and knobs. Going back to the Local State is achieved by sending the Go to Local (GL) command or by pressing the STATUS/LOCAL key on the frontpanel (Refer also to "Local Lockout"...
Page 230 THE CPL PROTOCOL 6 - 13 IDENTIFICATION Purpose: Returns the identification of the oscilloscope. It gives information about the model number, the version numbers of all software modules and the installed options. This Identification (ID) command gives the same information as can be read from the oscilloscope screen after pressing the frontpanel knob UTILITY and the softkey MAINTENANCE.
Page 231 6 - 14 THE CPL PROTOCOL example response: FLUKE;PM 3380B;0;SW3394BI V4.0 1996-10-02;UHM V1.0;UFO V2.0;IEEE;EMCR 1 - manufacturer 2 - model number of the oscilloscope 3 - information about the oscilloscope software 4 - information about the micro-controller software 5 - information about the frontpanel control software 6 - information about installed options, e.g.:...
Page 232 THE CPL PROTOCOL 6 - 15 LOCAL LOCKOUT Purpose: This instruction will inhibit the Go to Local function of the STATUS/LOCAL key on the frontpanel. Once activated, the Local Lockout State is disabled by sending the Go to Local (GL), the Reset Instrument (RI) command or by cycling power OFF and ON. (Refer also to "Go to Remote"...
Page 233 6 - 16 THE CPL PROTOCOL PROGRAM COMMUNICATION Purpose: To program baudrate, parity mode, number of data and stopbits and the handshake method for computer communication. After the command is sent, an <acknowledge> will be returned with the old communication parameters still active. If the <acknowledge>...
Page 234 THE CPL PROTOCOL 6 - 17 Response: acknowledge Note: approx. 0.5 sec after an <acknowledge> = 0 is received, the communication parameters are changed to the new values. Example: 100 PAR$="2400,N,8,1" :’comm parameters 110 CTL$=",XONXOFF" :’XONXOFF handshake 120 PRINT #1,"PC",PAR$,CTL$ :’Send command 130 GOSUB 1000 :’Sync on acknowledge...
Page 235 6 - 18 THE CPL PROTOCOL PROGRAM SETUP Purpose: To configure the oscilloscope using compact setup strings. This Program Setup (PS) command and the Query Setup (QS) command can be used together to restore and retrieve a complete setup or partial of the oscilloscope.
Page 236 THE CPL PROTOCOL 6 - 19 PROGRAM TEXT Purpose: To program text to an oscilloscope. If the S parameter is specified, setup text is programmed. The text will be set into one of the setup registers of the oscilloscope. The parameter n specifies the setup register.
Page 237 6 - 20 THE CPL PROTOCOL "S" setup text will be specified for register n; if "S" and n are left out, user text is specified one of the setup registers, ranging from 0 to 10; n=0 selects the current setup char a character byte;...
Page 238 THE CPL PROTOCOL 6 - 21 Examples: (of user text) Program the following user text to be displayed on the screen of the oscilloscope: Measurement 15 100 PRINT #1,"PT" :’Program user Text command 110 GOSUB 1000 :’Sync on acknowledge 120 PRINT #1,"Measurement 15":’Send user text 130 GOSUB 1000 :’Sync on acknowledge In the next example user text, containing non-keyboard characters ( =25...
Page 239 6 - 22 THE CPL PROTOCOL PROGRAM WAVEFORM Purpose: To send a waveform to the oscilloscope. This function is referred to as to Program a complete Waveform in the oscilloscope. A waveform is sent (programmed) in two command sequences. The first sequence selects the waveform register number, programs the waveform administration data, and programs the number of samples.
Page 240 THE CPL PROTOCOL 6 - 23 wave_nr The oscilloscope waveform destination: 011 - 084 for m1.1 - m8.4 01e - 08e for m1.e - m8.e 091 - 504 for m9.1 - m50.4 (Extended Memory only) 09e - 50e for m9.e - m50.e (Extended Memory only) (xx.e for 2 ch.
Page 241 6 - 24 THE CPL PROTOCOL sample 2 bytes (Most Significant Byte + Least Significant Byte), representing the 16 bit sample value (bit 16 = -32768, bit 15 = 16384, ..., bit 1 = 1). Range: -32k (down) to +32k (up) Example: 1000000011000111 = value -32569 byte 1...
Page 242 THE CPL PROTOCOL 6 - 25 Example program: 100 COUNT=512 :’Number of samples 110 PRINT "Generating trace samples ..." :’Display operator message 120 DIM WAVE(2*COUNT) :’Declare waveform array 130 FOR I=1 TO COUNT :’For all samples SAMPLE = INT(19200*SIN(I/40.744)) :’Generate sine value LSB = SAMPLE AND &HFF :’Calculate Least Sign.
Page 243 6 - 26 THE CPL PROTOCOL QUERY MEASUREMENT Purpose: To obtain measurement data from an oscilloscope. If the V (Value) parameter is specified, one measured value will be returned. If the L (Logging) parameter is specified, an infinite number of measured values will be returned.
Page 244 THE CPL PROTOCOL 6 - 27 meas_type suffix_unit Note: variable variable measurement 1 variable variable measurement 2 delta Voltage between cursors Volt cursor 1 Volt cursor 2 Volt dc delta Time between cursors Frequency (1/dT) delta X Phase difference T1-trg Time between cursor 1 and trigger T2-trg Time between cursor 2 and trigger...
Page 245 6 - 28 THE CPL PROTOCOL meas_type string of characters, specifying the type of the measured value, e.g. "Tr" meas_value string of characters, specifying the measured value in floating point notation, e.g. "98934E-09" suffix_unit string of characters, specifying the unit of the measured value: "V", "s"...
Page 246 THE CPL PROTOCOL 6 - 29 QUERY PRINT Purpose: To obtain the graphical data of the display from the oscilloscope. The Query Print (QP) command can be used to retrieve a complete display picture, which can be stored as a HPGL file in the PC. This file can then be used in for example FLUKEVIEW, Word Perfect or Word files.
Page 247 6 - 30 THE CPL PROTOCOL Example: Written in Quick Basic; CLOSE OPEN “COM2:19200,N,8,1, CS0, DS0, CD0” FOR RANDOM AS #1 OPEN “HPGL.HGL” FOR OUTPUT AS #2 : ‘Open output file PRINT #1, “QP”; 1 : ‘Query print Start! = TIMER WHILE ((TIMER <...
Page 248 THE CPL PROTOCOL 6 - 31 QUERY SETUP Purpose: To query the oscilloscope for its current setup. This Query Setup (QS) command and the Program Setup (PS) command can be used together in order to retrieve and restore a complete or partical setup of the oscilloscope.
Page 249 6 - 32 THE CPL PROTOCOL Example: (Complete setup query) 90 DIM SETUP$[25] :’Reserve space 100 PRINT #1,"QS" :’Send command 110 GOSUB 1000 :’Sync on acknowledge 120 INPUT #1,N :’Read number of node strings 130 FOR I=1 TO N INPUT #1,SETUP$[I] :’Read all node strings PRINT "N= ";I;SETUP$[I] 160 NEXT I...
Page 250 THE CPL PROTOCOL 6 - 33 QUERY TEXT Purpose: To query text from an oscilloscope. If the S parameter is specified, setup text is returned. The text will be queried from one of the setup registers of the oscilloscope. The parameter n specifies the setup register.
Page 251 6 - 34 THE CPL PROTOCOL Example: (of user text) Read the user text from the screen of an oscilloscope: 90 DIM USERTXT$ (64) 100 PRINT #1,"QT" :’Query user Text command 110 GOSUB 1000 :’Sync on acknowledge 120 LINE INPUT #1,USERTXT$ :’Read text characters 130 PRINT USERTXT$ :’Print user text...
Page 252 THE CPL PROTOCOL 6 - 35 QUERY WAVEFORM Purpose: To obtain a complete waveform from the oscilloscope. You can use the PW command to send the data received with the QW query back to the oscilloscope. The option ",A" can be used to recall the date and time in the customized format. When compatibility with initial versions of these oscilloscopes is required this ",A"...
Page 253 6 - 36 THE CPL PROTOCOL wave_nr The oscilloscope waveform source: 001 - 004 for CH1 - CH4 00e for EXT TRIG 011 - 084 for m1.1 - m8.4 01e-08e for m1.e - m8.e 091 - 504 for m9.1 - m50.4 (Extended Memory only) 09e - 50e for m9.e - m50.e (Extended Memory only) (xx.e for 2 ch.
Page 254 THE CPL PROTOCOL 6 - 37 Example: 100 PRINT #1,"QW";74 :’Query waveform (m7.4) 110 GOSUB 1000 :’Sync on acknowledge 120 INPUT #1,NM$ :’Trace_name 130 INPUT #1,YUNIT$ :’Y_unit 140 INPUT #1,XUNIT$ :’X_unit 150 INPUT #1,YZERO :’Y_zero 160 INPUT #1,XZERO :’X_zero 170 INPUT #1,YRESOL :’Y_resolution 180 INPUT #1,XRESOL :’X_resolution...
Page 255 6 - 38 THE CPL PROTOCOL Interpretation of waveform data As a response to the QW command the oscilloscope sends a set of data describing the waveform. The following example shows the interpretation of that data. The example assumes the Probe Adjust signal to be applied to input channel 1. For information about MATHPLUS, refer to the supplement for the operation guide.
Page 256 THE CPL PROTOCOL 6 - 39 Definitions A waveform can be described as a set of two one dimensional arrays: S[1...N] and T[1...N]. The index n corresponds with the number of the samples and is an integer value in the range 1...N. The waveform of a sampled signal describes for a range of sample moments (T[1]...T[N];...
Page 257 6 - 40 THE CPL PROTOCOL Time base In case of a sampled signal the horizontal scale is called the time base. The time base setting is usually expressed in seconds/division. Without magnification or compression the oscilloscope always displays 50 samples per horizontal division. Note: The horizontal scale as well as the FFT scale can differ.
Page 258 THE CPL PROTOCOL 6 - 41 RESET INSTRUMENT Purpose: Resets all of the software of the oscilloscope, including the CPL protocol handler and all of the input and output buffers. Oscilloscope settings remain the same. Interface parameters are not changed in order to keep the communication alive.
Page 259 6 - 42 THE CPL PROTOCOL RECALL SETUP Purpose: To recall an internally stored setup from one of 10 setup registers. This setup must have been stored in the oscilloscope manually or with the Save Setup (SS) command. The command performs the same as the frontpanel key SETUPS together with the softkey RECALL.
Page 260 THE CPL PROTOCOL 6 - 43 SAVE SETUP Purpose: To save the current oscilloscope setup in one of 10 internal setup registers. This setup can be recalled manually or by sending the Recall Setup (RS) command. The command performs the same as the frontpanel key SETUPS together with the softkey SAVE.
Page 261 6 - 44 THE CPL PROTOCOL STATUS Purpose: To obtain a more detailed status report. The response gives more information about the conditions, causing a wrong acknowledge. The status is returned as one or more signed decimal integers. Each bit of the equivalent 16-bit binary status word represents a status condition. If a bit is set, the corresponding status event has occurred.
Page 262 THE CPL PROTOCOL 6 - 45 Example: 100 PRINT #1,"ST" :’Send command 110 GOSUB 1000 :’Sync on acknowledge 120 INPUT #1,STATUS :’Read Status word 130 IF STATUS < 0 THEN GOTO 120 :’Fetch next status 140 GOSUB 2000 :’Display Status example status: 6CR (= 0000000000000110 in binary) which means: (because bit 2 and bit 1 are set)
Page 263 6 - 46 THE CPL PROTOCOL TRIGGER ACQUISITION Purpose: To perform a software trigger. This command causes an acquisition or sweep to be started. It is the software equivalent of a normal trigger pulse. In the single shot mode the AT (Arm Trigger) command is sent to arm the triggering first.
Page 264: Acknowledge
THE CPL PROTOCOL 6 - 47 6.6 ACKNOWLEDGE The <acknowledge> is a synchronization reply that is returned after each command sent to the oscilloscope, signalling correct or incorrect operation: "0" Ok, normal situation "1" Syntax error (ST query may give more info) "2"...
Page 265: Status
6 - 48 THE CPL PROTOCOL 6.7 STATUS The Status word gives more information when the acknowledge is non- zero. A certain bit in the word can be found by performing a logical AND of the status word with the mask defined below. (Logical AND: the words are compared bitwise and only when both bits are 1, the result bit is 1) Example:...
Page 266 THE CPL PROTOCOL 6 - 49 Example program to investigate status: 2000 PRINT "STATUS IS: ";STATUS 2010 PRINT "MEANING: "; 2020 IF (STATUS AND &H0001) > 0 THEN PRINT "UNKNOWN HEADER" 2030 IF (STATUS AND &H0002) > 0 THEN PRINT "WRONG DATA FORMAT" 2040 IF (STATUS AND &H0004) >...
Page 267: Setup
6 - 50 THE CPL PROTOCOL 6.8 SETUP The Query Setup (QS) and Program Setup (PS) commands can be used together in order to retrieve and restore a complete or partical setup of the oscilloscope. When a setup is requested from the oscilloscope, it will send its setup as a sequence of strings.
Page 268 THE CPL PROTOCOL 6 - 51 meaning Events Trigger Delay settings (event counter low/high, trigger level low/high, trigger source, event bits, trigger coupling) SCPI Trigger Settings (SCPI trigger source low/high) Cursor settings (V cursors on/off, T cursors on/off, rise time on/off, control V/T, Vpp on/off, rise time 10-90/20-80, readout Vpp/V+V-, cursors on/off, V readout delta/absolute/ratio, T readout delta/1/delta/ratio, channel FFT read out dBm/dB V/Vrms, FFT reference impedance)
Page 269 6 - 52 THE CPL PROTOCOL Applications: The setup nodes for different timebase settings can be stored separately. They can be used afterwards as fixed ’templates’ to change only the oscilloscope timebase setup. The layout of each setup node string is: nnllxxxxxx..xx where all characters are in the hexadecimal range (0..9,A..F).
Page 270: Appendix Aacquire Menu Structure
ACQUIRE MENU STRUCTURE A - 1 Appendix A ACQUIRE menu structure DIGITAL MODE: ACQUIRE ACQUIRE TRACK AVERAGE PEAK DET on off ENVELOPE on off ST6565 9312...
Page 271: Appendix B Cursors Menu Structure
B - 1 CURSORS menu structure Appendix B CURSORS menu structure ANALOG ANALOG DIGITAL CURSORS CURSORS CURSORS CURSORS CURSORS on off on off on off on off CONTROL CONTROL READOUT READOUT READOUT READOUT CURSORS CURSORS CURSORS READOUT READOUT READOUT 1/ T 1/ T T-ratio T-ratio...
Page 272 CURSORS menu structure B - 2 CURSORS CURSORS CURSORS CURSORS CURSORS on off on off on off on off select select CONTROL CONTROL cursor cursor trace trace READOUT READOUT READOUT READOUT CURSORS CURSORS CURSORS READOUT READOUT READOUT 1/ T 1/ T 1/ T T-ratio T-ratio...
Page 273: Appendix Cdisplay Menu Structured
DISPLAY MENU STRUCTURE C - 1 Appendix C DISPLAY menu structured ANALOG MODE: DISPLAY DISPLAY X-DEFL on off X-SOURCE ANALOG X-DEFL TEXT line RETURN TRACK USE: for Position for Character DIGITAL MODE: DISPLAY EDIT X vs Y DISPLAY TEXT USER TEXT TRIG IND on off...
Page 274: Appendix D Mathematics Menu Structure
D - 1 MATHEMATICS MENU STRUCTURE Appendix D MATHEMATICS menu structure MATH MATH MATH n MATH MATH 1 MATH 2 filter filter on off on off TRACK SCALE PARAM DISPLAY DISPLAY SOURCE SOURCE yes no yes no MATH 2 MATH 1 ENTER MATH MATH...
Page 275: Appendix Emeasure Menu Structure
MEASURE MENU STRUCTURE E - 1 Appendix E MEASURE menu structure...
Page 276: Appendix Fdtb (Del'd Tb) Menu Structure
F - 1 DTB (DEL’D TB) menu structure Appendix F DTB (DEL’D TB) menu structure (TB MODE) EVENTS DELAY DELAYED DELAYED TIMEBASE TIMEBASE (TRIGGER) DELAY TB DELAY TB on off on off MAIN TB MAIN TB on off on off starts trig’d TRACK...
Page 277: Appendix G Save/Recall Menu Structure
SAVE/RECALL MENU STRUCTURE G - 1 Appendix G SAVE/RECALL menu structure...
Page 278: Appendix Hsetups Menu Structure
H - 1 SETUPS MENU STRUCTURE Appendix H SETUPS menu structure SETUPS CLEAR& CLEAR CLEAR FRONT PROTECT SETUPS SETUPS SETUPS SETUPS CONFIRM CONFIRM TRACK TRACK PROTECT recall on off undo save clear ARE YOU OVERRULE PROTECT? SURE ? clear TEXT CLEAR&...
Page 279: Appendix Jtb Mode Menu Structure
TB MODE MENU STRUCTURE J - 1 Appendix J TB MODE menu structure ANALOG: TB MODE TB MODE EVENT EVENT DELAY DELAY on off on off auto TRACK trig single COUNT 1022 CHANNEL 1 2 3 4 ANALOG LEVEL +99.8mV alt chop RETURN RETURN...
Page 280: Appendix Ktrigger Menu Structure
K - 1 TRIGGER menu structure Appendix K TRIGGER menu structure ANALOG MODE: TRIGGER TRIGGER TRIGGER TRIGGER MAIN TB MAIN TB MAIN TB edge tv edge tv edge tv field 1 field 1 field 2 field 2 line lines lines TRACK level-pp LINE NBR...
Page 281 TRIGGER menu structure K - 2 VIDEO SYSTEM hdtv ntsc secam LINES 1050 1125 1250 ENTER TRIGGER TRIGGER TRIGGER MAIN TB MAIN TB MAIN TB edge tv edge tv edge tv logic logic logic state state state pattern pattern pattern glitch glitch glitch...
Page 282: Appendix Lutility Menu Structure
L - 1 UTILITY menu structure Appendix L UTILITY menu structure...
Page 283 UTILITY menu structure L - 2...
Page 284: Appendix Mvertical Menu Structure
M - 1 VERTICAL MENU STRUCTURE Appendix M VERTICAL menu structure VERT MENU VERTICAL MENU BW LIMIT on off on off on off on off on off ST7412 9312...
Page 285: Appendix N Rs-232 Cable Configurations
RS-232 CABLE CONFIGURATIONS N - 1 Appendix N RS-232 Cable configurations This appendix supplies additional information about the RS-232 cable configurations between the oscilloscope and a connected device. The oscilloscope and most of the devices are Data Terminal Equipment (DTE) configurated.
Page 286 N - 2 RS-232 CABLE CONFIGURATIONS B. Cable to printer/plotter with hardware handshake parameters: "3-wire/7-wire" = 7-wire "XON-XOFF on off" = on or off OSCILLOSCOPE PRINTER/PLOTTER (DTE) (DTE) SIGNAL 9 PIN 9 PIN 25 PIN (female) (male) (male) S.GND F.GND CASE CASE ST6921...
Page 287: Appendix P
APPENDIX P P - 1 Appendix P CHANNELS SIMULTANEOUSLY SAMPLED AT 100 MS/s The scope has two 8-bit flash analog-to-digital converters (ADCs), each with a maximum sample rate of 100 MS/s. This allows two channels to be captured simultaneously in single shot mode, with sample rates of up to 100 MS/s for each channel.
Page 288 P - 2 APPENDIX P CHANNEL ACQUISITIONS For three- or four-channel acquisition, the ADCs are used in conjunction with the chopped mode or alternate mode. In the chopped mode the first ADC takes a single sample on channel 1, then one on channel 3, then one on channel 1 again and so on.
Page 289 APPENDIX P P - 3 EXPANSION AND INTERPOLATION Sometimes there is a need to look at a single shot or low repetition rate signal at high timebase speed. This can be done by selecting the ‘real time sampling only’ mode in the Main Time Base menu. In this mode the scope never switches to random sampling.
Page 290: Function Index (See Chapter 5
FUNCTION INDEX I - 1 FUNCTION INDEX (see Chapter 5) ACQUISITION LENGTH ADD INVERT SUBTRACT ADD (MATHEMATICS) ALT/CHOP ANALOG MODE AUTO RANGE AUTOSET AUTOSET RECALL SEQUENCE AUTOSET USERPROG AVERAGE BANDWITH LIMITER CALIBRATION AUTOCAL CHANNEL TRACE SELECTION CONFIDENCE CHECK CURSORS CURSORS READOUT DELAY DELAY MEASUREMENT DEL’D TB...
Page 291 I - 2 FUNCTION INDEX MAGNIFY HORIZONTAL MAGNIFY VERTICAL MAIN TB TIME/DIV MATHEMATICS MEASURE MENU MULTIPLY PEAK DETECTION POSITION POWER SUPPLY PRINTING AND PLOTTING PROBE UTILITIES REMOTE CONTROL RUN/STOP SCREEN CONTROLS AND GRATICULE SCREEN MESSAGES SETUPS SETUPS RECALL SEQUENCE STANDARD FRONT/FRONT PANEL RESET STATUS SCREEN SUBTRACT (MATHEMATICS) TB MODE...
Page 292: Index
FUNCTION INDEX I - 3 INDEX The overall index contains all function names and reference words in alphabetical order. It refers to the relevant section and page number, mainly of Chapter 5 (Function Reference). In this chapter more detailed information can be found. Entry Refer to chapter/function Page...
Page 293 I - 4 FUNCTION INDEX Entry Refer to chapter/function Page Clock PRINTING AND PLOTTING... . 5-55 Command switch TOUCH, HOLD & MEASURE ™ MODE . . 5-78 Common mode ADD INVERT SUBTRACT ....5-4 Confidence CONFIDENCE CHECK .
Page 294 FUNCTION INDEX I - 5 Entry Refer to chapter/function Page Glitch PEAK DETECTION ....5-51 Glitch trigger GLITCH TRIGGER ....5-36 INPUT COUPLING .
Page 295 I - 6 FUNCTION INDEX Entry Refer to chapter/function Page Memory 4.9 MEMORY FUNCTIONS ....4-49 Memory back-up 2.2 MEMORY BACK-UP BATTERIES ..2-3 Memory bar CURSORS .
Page 296 FUNCTION INDEX I - 7 Entry Refer to chapter/function Page Safety OPERATORS SAFETY....1-1 Sampling TIMEBASE MODES ....5-73 APPENDIX N .
Page 297 I - 8 FUNCTION INDEX User text USER TEXT ......5-87 Vertical deflection 4.4 VERTICAL DEFLECTION ... . . 4-13 Vertical functions 4.7 ADVANCED VERTICAL FUNCTIONS .

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Fluke CombiScope PM3370B User Manual

Table of Contents

1 Operators Safety

2 Installation Instructions

3 Getting Started

4 How to Use more Advanced Functions of the Instrument

5 Function Reference

Appendix N

6 The Cpl Protocol

Appendix Aacquire Menu Structure

Appendix B CURSORS Menu Structure

Appendix Cdisplay Menu Structured

Appendix D MATHEMATICS Menu Structure

Appendix Emeasure Menu Structure

Appendix Fdtb (DEL'D TB) Menu Structure

Appendix G SAVE/RECALL Menu Structure

Appendix Hsetups Menu Structure

Appendix Jtb MODE Menu Structure

Appendix Ktrigger Menu Structure

Appendix Lutility Menu Structure

Appendix Mvertical Menu Structure

Appendix N RS-232 Cable Configurations

Appendix P

FUNCTION INDEX (See Chapter 5

Index

Time Measurements

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Table of Contents