Agilent 54600B User and Service Guide

Download

User and Service Guide

Publication number 54600-97021 November 1997 (pdf version April 2002)

For Safety Information, Warranties, and Regulatory information, see the pages behind the index.

HP 54600B, HP54601B, HP 54602B, and HP 54603B Oscilloscopes

General-Purpose Oscilloscopes

The HP 54600B-Series Oscilloscopes offer exceptional waveform viewing and measurements in a small, lightweight package. The two-channel HP 54600B and HP 54603B are suited for production, field service, and education applications. The four-channel HP 54601B is best suited for research and design labs, and applications involving digital circuit test and troubleshooting. For higher frequency applications, the HP 54602B provides 150 MHz bandwidth and triggering up to 250 MHz. Each of these oscilloscopes gives you:

60-MHz bandwidth (HP 54603B)

•

100-MHz bandwidth (HP 54600B and HP 54601B) 150-MHz bandwidth (HP 54602B)

Automatic setup of the front panel

•

Automatic and cursor measurements of frequency, time, and voltage

•

Waveform storage

•

Save and recall of 16 front-panel setups

•

Peak detect

•

These oscilloscopes are easy to use with familiar controls and high display update rate, but with none of the viewing problems that are associated with analog oscilloscopes. A bright, crisp display is obtained at all sweep speeds and delayed sweep magnifications. Storage is as simple as pressing a button. Negative time allows the viewing of events that occur before the trigger event. Cursors and automatic measurements greatly simplify the analysis of these events.

You can upgrade this oscilloscope for hardcopy or remote control with the addition of an interface module. Unattended waveform monitoring and additional waveform math, such as FFT, can be added with the addition of one of the Measurement/Storage modules.

Bring your scope and PC together with BenchLink software. BenchLink, which runs under Windows, allows easy transfer of scope traces and waveform data to your PC for incorporation into documents or storage.

Accessories supplied

Two 1.5 meter, 10:1 Probes (HP 10071A)

•

Power cord for country of destination

•

This

•

• Programmer’s Guide

Accessories available

•

User and Service Guide

with Microsoft Windows Help file, ascii help

file, and sample programs.

HP 34810B BenchLink/Scope Software for Windows HP 54650A HP-IB Interface Module HP 54652A Parallel Interface Module HP 54654A Operator’s Training Kit HP 54655A and HP 54656A Test Automation Modules HP 54657A HP-IB Measurement Storage Module HP 54659B Serial/Parallel Measurement/Storage Modules HP 5041-9409 Carrying Case HP 5062-7345 Rackmount Kit HP 10070A 1.5 meter, 1:1 Probe HP 10100C 50 Ω Termination

•

iii

Options available

Option 001 RS-03 Magnetic Interference Shielding Added to CRT

•

Option 002 RE-02 Display Shield Added to CRT

•

Option 005 Enhanced TV/Video Trigger (HP 54602B only)

•

Option 090 Deletes Probes

•

Option 101 Accessory Pouch and Front-Panel Cover

•

Option 102 Two Additional HP 10071A 10:1 Probes (HP 54602B

•

only) Option 103 Operator’s Training Kit (HP 54654A)

•

Option 104 Carrying Case (HP 5041-9409)

•

Option 106 BenchLink/Scope Software (HP 34810B)

•

Option 1CM Rackmount Kit (HP 5062-7345)

•

Power Cords (see the table of Replaceable Parts at the end of

•

Chapter 4, Service.)

In This Book

This manual is the user and service guide for the HP 54600B, HP 54601B, HP 54602B, and HP 54603B Oscilloscopes, and contains five chapters.

First Time UsersChapter 1 is a quick start guide that gives you a brief overview of the oscilloscope.

Advanced usersChapter 2 is a series of exercises that guide you through the operation of the oscilloscope.

TV/Video triggeringChapter 3 shows how to use enhanced TV/Video triggering if you have Option 005 installed in your oscilloscope.

The Oscilloscope at a Glance

Operating Your Oscilloscope

Using Option 005 Enhanced

TV/Video Trigger (HP 54602B)

Service

Performance Characteristics

Glossary

Index

Service techniciansChapter 4 contains the service information for the oscilloscope. There are procedures for verifying performance, adjusting, troubleshooting, and replacing assemblies in the oscilloscope.

Reference informationChapter 5 lists the characteristics of the oscilloscope.

1 The Oscilloscope at a Glance

To inspect the instrument 1–6 To clean the instrument 1–6 To connect a signal to the oscilloscope 1–7 To display a signal automatically 1–9 To set up the vertical window 1–10 To set up the time base 1–12 To trigger the oscilloscope 1–14 To use roll mode 1–16

2 Operating Your Oscilloscope

To use delayed sweep 2–3 To use storage oscilloscope operation 2–6 To capture a single event 2–8 To capture glitches or narrow pulses 2–10 To trigger on a complex waveform 2–12 To make frequency measurements automatically 2–14 To make time measurements automatically 2–16 To make voltage measurements automatically 2–19 To make cursor measurements 2–22 To view asynchronous noise on a signal 2–26 To reduce the random noise on a signal 2–28 To save or recall traces 2–31 To save or recall front-panel setups 2–32 To reset the instrument setup 2–33 To use the XY display mode 2–34 To analyze video waveforms 2–38

Contents–1

Contents

3 Using Option 005 Enhanced TV/Video Trigger (HP 54602B)

To select TV display grid 3–4 To autoscale on a video signal 3–4 To trigger on a specific line of video 3–5 To trigger on all TV line sync pulses 3–7 To trigger on a specific field of the video signal 3–8 To trigger on all fields of the video signal 3–9 To trigger on odd or even fields 3–10 To make cursor measurements 3–12 To use delayed sweep 3–14 To analyze video waveforms with Option 005 3–16 To window in on harmonic distortion using FFT 3–18 To connect to other instruments 3–20

4Service

To return the oscilloscope to Hewlett-Packard 4–4

Verifying Oscilloscope Performance 4–5

To check the output of the To verify voltage measurement accuracy 4–7 To verify bandwidth 4–10 To verify bandwidth (alternate method) 4–12 To verify horizontal ∆t and 1/∆t accuracy 4–16 To verify trigger sensitivity 4–18 To verify Vertical Output on Option 005 4-22

DC CALIBRATOR

4–6

Contents–2

Adjusting the Oscilloscope 4–27

To adjust the power supply 4–28 To perform the self-calibration 4–31 To adjust the low-frequency compensation 4–33 To adjust the high-frequency pulse response 4–35 To adjust the display 4–37 To adjust the Option 005 offset (R15)

(HP 54602B only)

Troubleshooting the Oscilloscope 4–40

To construct your own dummy load 4–41 To check out the oscilloscope 4–42 To check the Low Voltage Power Supply 4–45 To run the internal self-tests 4–46 To troubleshoot Option 005

(HP 54602B only)

4–48

Contents

4–39

Replacing Parts in the Oscilloscope 4–49

To replace an assembly 4–50 To remove the fan 4–51 To remove the front panel 4–51 To remove the display 4–53 To remove the system board 4–53 Power supply 4–54 Keyboard 4–55 To remove the handle 4–56 To remove the Option 005 board 4–56 To order a replacement part 4–57

Contents–3

Glossary

Contents

5 Performance Characteristics

Vertical System 5–3 Horizontal System 5–5

Trigger System 5–6 XY Operation 5–8 Display System 5–8 Acquisition System 5–9 Advanced Functions 5–10 Power Requirements 5–10 General 5–11 Option 005 General Performance Characteristics Option 005 Trigger System

(HP 54602B only)

5–14

5–13

Index

Contents–4

The Oscilloscope at a Glance

One of the first things you will want to do with your new oscilloscope is to become acquainted with its front panel. Therefore, we have written the exercises in this chapter to familiarize you with some of its controls.

The front panel has knobs, grey keys, and white keys. The knobs are used most often and are similar to the knobs on other oscilloscopes. The grey keys bring up softkey menus on the display that allow you access to many of the oscilloscope features. The white keys are instant action keys and menus are not associated with them.

Throughout this book, the front-panel keys are denoted by a box around the name of the key, and softkeys are denoted by a change in the text type. For example, labeled source under the trigger portion of the front panel, and

Line

is a softkey. The word

directly above an unlabeled softkey (which is also grey).

Source

Line

is at the bottom of the display

is the grey front-panel key

1–2

Figure 1–1

General controls

The Oscilloscope at a Glance

Figure 1-1 is a diagram of the front-panel controls and input connectors of the HP 54600B and HP 54603B. Figure 1-2 is a diagram of the front-panel controls and input connectors of the HP 54601B and HP 54602B.

Figure 1-3 is a status line example on the HP 54602B. The status line, located at the top of of the display, lets you quickly determine the setup of the oscilloscope. In this chapter you will learn to read at a glance the setup of the oscilloscope from the status line.

Figure 1-4 is a diagram showing which grey keys to press to bring up the various softkey menus.

Storage keys

Channel controls

Channel inputs

HP 54600B and HP 54603B Front Panel Controls

Trigger controls

External trigger input

Horizontal controls

1–3

Figure 1–2

General controls

Channel controls

Channel inputs

HP 54601B and HP 54602B Front Panel Controls

Storage keys

Horizontal controls

Trigger controls

Figure 1–3

Channel 1 is on, ac coupled, invert ed, 100 mV/div

HP 54602B Display Status Line Indicators

1–4

Channel 4 is on, 10 V/ di v

Channel 3 is off

Channel 2 is on, 4 V/div

Delaye d sw eep is on, 500 ns/div

Main swee p 500 µs/div

Auto st o re is on

Auto triggered, positive slope; trigger source is channel 1

Peak detect is on and operating

Figure 1– 4

Press this key To obtain this menu

To obtain this menuPress this key

Softkey Menu Reference

1–5

The Oscilloscope at a Glance

To inspect the instrument

Inspect the shipping container for damage.

Keep a damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically.

Check the accessories.

Accessories supplied with the instrument are listed in "Accessories Supplied" in the front of this manual.

If the contents are incomplete or damaged notify your HP sales office.

•

Inspect the instrument.

If there is mechanical damage or defect, or if the instrument does not

•

operate properly or pass performance tests, notify your HP sales office. If the shipping container is damaged, or the cushioning materials show

•

signs of stress, notify the carrier as well as your HP sales office. Keep the shipping materials for the carrier’s inspection. The HP office will arrange for repair or replacement at Hewlett-Packard’s option without waiting for claim settlement.

To clean the instrument

If this instrument requires cleaning, disconnect it from all power sources and clean it with a mild detergent and water. Make sure the instrument is completely dry before reconnecting it to a power source.

1–6

The Oscilloscope at a Glance

To connect a si gnal to the oscill os cope

To connect a signal to the oscilloscope

The HP 54600B and HP 54603B are a two-channel oscilloscopes with an external trigger input, while the HP 54601B and HP 54602B are four-channel oscilloscopes. The four-channel oscilloscope replaces the external trigger input with channels 3 and 4. In this exercise you connect a signal to the channel 1 input.

To avoid damage to your new oscilloscope, make sure that the voltage level of the signal you are using is less than or equal to 400 V (dc plus the peak ac). For a complete list of the characteristics see chapter 5, "Performance Characteristics."

•

Use a cable or a probe to connect a signal to channel 1.

If you are using a probe, the oscilloscope allows you to enter the attenuation factor for the probe. The attenuation factor changes the vertical scaling of the oscilloscope so that the measurement results reflect the actual voltage levels at the probe tip.

•

To set the probe attenuation factor press softkey to change the attenuation factor to match the probe you are using.

. Next toggle the

Probe

1–7

Figure 1–5

Overcompensation causes pulse peaking.

The Oscilloscope at a Glance

To connect a signal to the oscilloscope

You should compensate 10:1 probes to match their characteristics to the oscilloscope. A poorly compensated probe can introduce measurement errors. To compensate a probe, follow these steps.

Connect the 10:1 probe from channel 1 to the front-panel probe adjust signal on the oscilloscope.

Press

Autoscale

Use a nonmetallic tool to adjust the trimmer capacitor on the probe

2 3

for the flattest pulse possible as displayed on the oscilloscope.

Figure 1–6

Correct compensation with a flat pulse top.

Figure 1–7

Undercompensation causes pulse rolloff.

1–8

The Oscilloscope at a Glance

To display a signal automatically

The oscilloscope has an Autoscale feature that automatically sets up the oscilloscope to best display the input signal. Using Autoscale requires signals with a frequency greater than or equal to 50 Hz and a duty cycle greater than 1%.

When you press the Autoscale key, the oscilloscope turns on and scales all channels that have signals applied, and it selects a time base range based on the trigger source. The trigger source selected is the highest numbered input that has a signal applied. (If a signal is connected to the external trigger input on the HP 54600B and HP 54603B, then it is selected as the trigger source.)

Connect a signal to the oscilloscope.

Press

Autosc al e

When you press the Autoscale key, the oscilloscope changes the front-panel setup to display the signal. However, if you pressed the Autoscale key unintentionally, you can use the Undo Autoscale feature. To use this feature, perform the following step.

•

Press

Setup

. Next, press the

Undo Autoscale

softkey.

The oscilloscope returns to the configuration in effect before you pressed the Autoscale key.

1–9

The Oscilloscope at a Glance

To set up the vertical window

The following exercise guides you through the vertical keys, knobs, and status line.

Center the signal on the display with the Position knob.

The Position knob moves the signal vertically, and it is calibrated. Notice that as you turn the Position knob, a voltage value is displayed for a short time indicating how far the ground reference is located from the center of the screen. Also notice that the ground symbol on the right side of the display moves in conjunction with the Position knob.

Measuremen t hi nts

If the channel is dc coupled, y ou can quickly measure the dc component of the signal by si m pl y noting its distance from the ground symbol.

If the channel is ac coupled, the dc component of t he signal is removed allowing you to use gre ater sensitivit y t o di splay the ac com ponent of the si gnal .

1–10

The Oscilloscope at a Glance

To set up the vertical window

Change the vertical setup and notice that each change affects the status line differently.

You can quickly determine the vertical setup from the status line in the display.

Change the vertical sensitivity with the Volts/Div knob and notice that it

•

causes the status line to change. For channels 3 and 4 on the HP 54601B and HP 54602B, press

the vertical sensitivity.

Press

•

A softkey menu appears on the display, and the channel turns on (or remains on if it was already turned on).

Toggle each of the softkeys and notice which keys cause the status line to

•

change. Channels 1 and 2 have a vernier softkey that allows the Volt/Div knob

to change the vertical step size in smaller increments. These smaller increments are calibrated, which results in accurate measurements even with the vernier turned on.

To turn the channel off, either press

•

left-most softkey.

3 or 4

. Then use the softkeys to change

a second time or press the

Invert operating hint

When you are tri ggered on the signal you are inverting, the inversion also applies to the trigger signal (what was a rising edge now is a falling edge) . If the signal has a 50 % duty cycle (square wave or si ne wave), the di splayed waveform app ears not to invert. However, for si gnals with a dut y cycle other than 50%, the di splayed waveform does inv ert as you would expect.

1–11

The Oscilloscope at a Glance

To set up the time base

The following exercise guides you through the time base keys, knobs, and status line.

Turn the Time/Div knob and notice the change it makes to the status line.

The Time/Div knob changes the sweep speed from 2 ns to 5 s in a 1-2-5 step sequence, and the value is displayed in the status line.

Change the horizontal setup and notice that each change affects the status line differently.

Main/D elayed

Press

•

A softkey menu appears on the display with six softkey choices. Toggle each of the softkeys and notice which keys cause the status line to

•

change. There is also a horizontal vernier softkey that allows the Time/Div

knob to change the sweep speed in smaller increments. These smaller increments are calibrated, which results in accurate measurements even with the vernier turned on.

1–12

The Oscilloscope at a Glance

To se t up the time base

Turn the Delay knob and notice that its value is displayed in the status line.

•

The Delay knob moves the main sweep horizontally, and it pauses at

0.00 s, mimicking a mechanical detent. At the top of the graticule is a solid triangle ( ▼ ) symbol and an open triangle ( ∇ ) symbol. The ▼ symbol indicates the trigger point and it moves in conjunction with the Delay knob. The ∇ symbol indicates the time reference point. If the time reference softkey is set to left, the ∇ is located one graticule in from the left side of the display. If the time

reference softkey is set to center, the ∇ is located at the center of the display. The delay number tells you how far the reference point ∇ is located from the trigger point ▼.

All events displayed left of the trigger point ▼ happened before the trigger occurred, and these events are called pretrigger information. You will find this feature very useful because you can now see the events that led up to the trigger point. Everything to the right of the trigger point ▼ is called posttrigger information. The amount of delay range (pretrigger and posttrigger information) available is dependent on the sweep speed selected. See "Horizontal System" in chapter 5 for more details.

1–13

The Oscilloscope at a Glance

To trigger the oscilloscope

The following exercise guides you through the trigger keys, knobs, and status line.

Turn the trigger Level knob and notice the changes it makes to the display.

On the HP 54601B and HP 54602B and on an internally triggered HP 54600B and HP 54603B, as you turn the Level knob or press a trigger menu key, for a short time two things happen on the display. First, the trigger level is displayed in inverse video. If the trigger is dc coupled, it is displayed as a voltage. If the trigger is ac coupled or if LF reject was selected, it is displayed as a percentage of the trigger range. Second, if the trigger source is turned on, a line is displayed showing the location of the trigger level (as long as ac coupling or low frequency reject are not selected).

Change the trigger setup and notice that each change affects the status line differently.

Source

•

Press

A softkey menu appears on the display showing the trigger source choices.

Toggle each of the softkeys and notice that each key causes the status line

•

to change.

Mode

Press

•

A softkey menu appears on the display with five trigger mode choices. Toggle the

•

line differently. (You can only select TV if the trigger source is either channel 1 or 2.)

When the oscilloscope is triggering properly, the trigger mode portion of the status line is blank.

1–14

Single

and

softkeys and notice that they affect the status

The Oscilloscope at a Glance

To trigger th e oscilloscope

What happens if the oscilloscope los es trigger?

If Auto Level is the trigger mode, Auto flashes in the status li ne. If dc coupled, the oscilloscope resets the trigger level to the c enter of the signal. If ac coupled, the oscillo scope resets the trigge r level to the middle of the scr een. (Every time you press the Auto Level softkey, the oscilloscope resets the trigger level.)

If Auto is the trigger mode, Auto flashes in the status line and the oscilloscope free runs.

If either Normal or TV is the trig ger m ode, the trigger setup flashes in the status line.

Slope/ Coupli ng

Press

•

A softkey menu appears on the display. If you selected Auto level, Auto, Normal, or Single as a trigger mode, six softkey choices are displayed. If you selected TV as a trigger source, five other softkey choices are available.

Toggle each of the softkeys and notice which keys affect the status line.

•

On the HP 54600B and HP 54603B, external trigger is always dc coupled. If you select ac coupling or low frequency reject, these functions do not occur until you change the trigger source to channel 1, channel 2, or line.

Adjust the Holdoff knob and notice the change it makes to the display.

Holdoff keeps the trigger from rearming for an amount of time that you set with the Holdoff knob. Holdoff is often used to stabilize the complex waveforms. The Holdoff range is from 200.0 ns to about 13.5 s. It is displayed, for a short time, in inverse video near the bottom of the display.

1–15

The Oscilloscope at a Glance

To use roll mode

Roll mode continuously moves data across the display from right to left. It allows you to see dynamic changes (like adjusting a potentiometer) on low frequency signals. Two frequently used applications are transducer monitoring and power supply testing.

Press

Mode

. Then press the

Auto Lvl, Auto

, or

Normal

softkey.

Press

Press the

The oscilloscope is now untriggered and runs continuously. Also notice that the time reference softkey selection changes to center and right.

Press

The oscilloscope fills either

reference selection), then it searches for a trigger. After a trigger is found, the remainder of the display is filled. Then, the oscilloscope stops acquiring data.

You can also make automatic measurements in the roll mode. Notice that the oscilloscope briefly interrupts the moving data while it makes the measurement. The acquisition system does not miss any data during the measurement. The slight shift in the display after the measurement is complete is that of the display catching up to the acquisition system.

Main/D el ay ed

Roll

softkey.

Mode

Roll mode oper ati ng hints

• Roll mode operates on channels 1 and 2 only .

• Math functions, averaging, and peak detect are not availabl e.

• Holdoff and horizontal del ay do not affect the signal.

• Both a free r unni ng (nontrigge red) display and a triggered disp l ay (available in the sing l e m ode only) are avail able.

• Roll mode is available at sweep speeds up to 200 ms.

. Then press the

Single

softkey.

of the display (depending on the time

1–16

Operating Your Oscilloscope

By now you are familiar with the

VERTICAL, HORIZONTAL

, and

TRIGGER

groups of the front-panel keys. You should also know how to determine the setup of the oscilloscope by looking at the status line. If you are unfamiliar with this information, we recommend you read chapter 1, "The Oscilloscope at a Glance."

This chapter takes you through two new groups of front-panel keys:

STORAGE

, and the group of keys that contains the Measure, Save/Recall, and Display keys. You will also add to your knowledge of the

HORIZONTAL

keys by using delayed sweep.

We recommend you perform all of the following exercises so you become familiar with the powerful measurement capabilities of the oscilloscope.

2–2

Operating You r Oscilloscope

To use delay ed sweep

To use delayed sweep

Delayed sweep is a magnified portion of the main sweep. You can use delayed sweep to locate and horizontally expand part of the main sweep for a more detailed (high resolution) analysis of signals. The following steps show you how to use delayed sweep. Notice that the steps are very similar to operating the delayed sweep in analog oscilloscopes.

Connect a signal to the oscilloscope and obtain a stable display. Press

Main/D el ay ed

Press the

The screen divides in half. The top half displays the main sweep, and the bottom half displays an expanded portion of the main sweep. This expanded portion of the main sweep is called the delayed sweep. The top half also has two solid vertical lines called markers. These markers show what portion of the main sweep is expanded in the lower half. The size and position of the delayed sweep are controlled by the Time/Div and Delay knobs. The

Time/Div next to the symbol is the delayed sweep sec/div. The delay value is displayed for a short time at the bottom of the display.

To display the delay value of the delayed time base, either

•

press

To change the main sweep Time/Div, you must turn off the delayed sweep.

•

Delayed

Main/D el ay ed

softkey.

or turn the Delay knob.

2–3

Figure 2–1

Delayed swe e p markers

Operating Your Oscilloscope

To use delay ed sweep

Since both the main and delayed sweeps are displayed, there are half as many vertical divisions so the vertical scaling is doubled. Notice the changes in the status line.

To display the delay time of the delayed sweep, either press

•

Main/D el ay ed

displayed near the bottom of the display.

Set the

Figure 2-1 shows the time reference set to left. The operation is like the delayed sweep of an analog oscilloscope, where the delay time defines the start of the delayed sweep.

time reference

or turn the delay knob. The delay value is

left

to either

center

Time reference set to left

2–4

Figure 2–2

Delayed sw eep markers

Operating You r Oscilloscope

To use delay ed sweep

Figure 2-2 shows the time reference set to center. Notice that the markers expand around the area of interest. You can place the markers over the area of interest with the delay knob, then expand the delayed sweep with the time base knob to increase the resolution.

Time reference set to center

2–5

Operating Your Oscilloscope

To use stora ge oscilloscope operation

To use storage oscilloscope operation

There are four front-panel storage keys. They are white instant action keys that change the operating mode of the oscilloscope. The following steps demonstrate how to use these storage keys.

Connect a signal to the oscilloscope and obtain a stable display.

Press

Autost or e

Notice that For easy viewing, the stored waveform is displayed in half bright and the

most recent trace is displayed in full bright. Autostore is useful in a number of applications.

Displaying the worst-case extremes of varying waveforms

•

Capturing and storing a waveform

•

Measuring noise and jitter

•

Capturing events that occur infrequently

•

STORE

replaces

RUN

in the status line.

2–6

Operating Your Oscilloscope

To use storage oscilloscope operation

Using the position knob, move the trace up and down about one division.

Notice that the last acquired waveform is in full bright and the previously acquired waveforms are displayed in half bright.

To characterize the waveforms, use the cursors. See "To make cursor

•

measurements" on page 2–22. To clear the display, press

•

To exit the Autostore mode, press either

•

Autostore

Summary of storage keys

Run

– The oscillosc ope acquires data and dis plays the most recent trace.

Stop – The display is frozen.

Erase

Run

Autostore

full bright and previously acquired waveforms in half bright.

Erase

– The oscilloscope acquires data, displaying the most recent trace in

– Clears t he di splay.

2–7

Operating Your Oscilloscope

To capture a si ngle event

To capture a single event

To capture a single event, you need some previous knowledge of the signal in order to set up the trigger level and slope. For example, if the event is derived from TTL logic, a trigger level of 2 volts should work on a rising edge. The following steps show you how to use the oscilloscope to capture a single event.

Connect a signal to the oscilloscope.

Set up the trigger.

Source

Press

•

Slope/ Coupli ng

Press

•

Turn the Level knob to a point where you think the trigger should work.

•

Press

Mode

. Select a trigger source with the softkeys.

. Select a trigger slope with the softkeys.

, then press the

Single

softkey.

Press

Pressing are met, data appears on the display representing the data points that the oscilloscope obtained with one acquisition. Pressing the Run key again rearms the trigger circuit and erases the display.

Erase

Run

to clear previous measurements from the display.

arms the trigger circuit. When the trigger conditions

2–8

If you need to compare several single-shot events, press

Autost ore

Operating You r Oscilloscope

To capture a single event

Like the

Run

Autost ore

key,

also arms the trigger circuit. When

the trigger conditions are met, the oscilloscope triggers. Pressing

Autost or e

again rearms the trigger circuit, but this time the display is not erased. All the data points are retained on the display in half bright with each trigger allowing you to easily compare a series of single-shot events.

After you have acquired a single-shot event, pressing a front-panel key, softkey, or changing a knob can erase the event from the display. If you press

Stop

, the oscilloscope will recover the event and restore the

oscilloscope settings.

To clear the display, press

•

To exit the Autostore mode, press either

•

Autost ore

. Notice that

Erase

RUN

Run

replaces

STORE

in the status line,

indicating that the oscilloscope has exited the Autostore mode.

Operating hi nt The single-s hot bandwidth is 2 MHz for singl e-channel operat i on, and 1 MHz for

two-channel operation. There are twice as ma ny sample points per waveform on the one-channel acquisiti on than on the two-channel acquisition. On the HP 54600B and HP 54603B, channels 1 and 2 are captured simult aneously. On the HP 54601B and HP 54602B channels 1 and 2 are captured simultane ously, then on the nex t t ri gger channels 3 and 4 are captured simultaneous l y.

2–9

Operating Your Oscilloscope

To capture gli tches or narrow pulses

To capture glitches or narrow pulses

A glitch is a rapid change in the waveform that is usually narrow as compared to the waveform. This oscilloscope has two modes of operation that you can use for glitch capture: peak detect and Autostore.

Connect a signal to the oscilloscope and obtain a stable display.

Find the glitch.

Use peak detect for narrow pulses or glitches that require sweep speeds slower than 50 µs/div.

To select peak detect, press

•

softkey.

Peak detect operates at sweep speeds from 5 s/div to 50 µs/div. When operating, the initials Pk are displayed in the status line in inverse video. At sweep speeds faster than 50 µs/div, the Pk initials are not displayed in inverse video, which indicates that peak detect is not operating.

Use Autostore for the following cases: waveforms that are changing, waveforms that you want to view and compare with stored waveforms, and narrow pulses or glitches that occur infrequently but require the use of sweep speeds outside the range of peak detect.

Autost ore

•

Press

Displa y

. Next, press the

Peak Det

You can use peak detect and Autostore together. Peak detect captures the glitch, while Autostore retains the glitch on the display in half bright video.

2–10

Operating You r Oscilloscope

To capture glitches or narrow pulses

Characterize the glitch with delayed sweep.

Peak detect functions in the main sweep only, not in the delayed sweep. To characterize the glitch with delayed sweep follow these steps.

Main/D elayed

Press

•

To obtain a better resolution of the glitch, expand the time base.

•

To set the expanded portion of the main sweep over the glitch, use the

•

Delay knob. To characterize the glitch, use the cursors or the automatic measurement

•

capabilities of the oscilloscope.

. Next press the

Delayed

softkey.

2–11

Operating Your Oscilloscope

To trigger on a complex waveform

The difficulty in viewing a complex waveform is triggering on the signal. Figure 2-3 shows a complex waveform that is not synchronized with the trigger.

The simplest trigger method is to trigger the oscilloscope on a sync pulse that is associated with the waveform. See "To trigger the oscilloscope" on page 1–14. If there is no sync pulse, use the following procedure to trigger on a periodic complex waveform.

Connect a signal to the oscilloscope.

Set the trigger level to the middle of the waveform.

Adjust the Holdoff knob to synchronize the trigger of the oscilloscope with the complex waveform.

By setting the Holdoff to synchronize the trigger, the oscilloscope ignores the trigger that results in figure 2-3, and waits for the trigger that results in figure 2-4. Also notice in figure 2-3 that the trigger is stable, but the waveform is not synchronized with the trigger.

Holdoff operating hints 1 The advantage of digital holdoff is that it is a fixed number. As a result,

changing the time base settings does not affect the holdoff number; so, the oscilloscope remains triggered. In contrast, the holdoff in analog oscilloscopes is a function of the time base setting making it necessary to readjust the holdoff each time you change the time base setting.

2 The rate of change of the holdoff adjustment knob depends on the time base setting you have selected. If you need a lengthy holdoff setting, increase the time/div setting on the time base, then make your coarse holdoff adjustment. Now switch back to the original time/div setting and make the fine adj ustment to reach the exact amount you want.

2–12

Figure 2–3

Operating You r Oscilloscope

To trigger on a complex waveform

Stable trigger, but the waveform is not synchronized with the trigger

Figure 2–4

Holdoff synchronizes the waveform with the trigger

In figure 2-4, the holdoff is set to about 25 µs (the duration of the pattern.)

2–13

Operating Your Oscilloscope

To make frequ ency measurements automatically

To make frequency measurements automatically

The automatic measurement capability of the oscilloscope makes frequency measurements easy, as the following steps demonstrate.

Connect a signal to the oscilloscope and obtain a stable display.

Press

A softkey menu appears with six softkey choices.

Toggle the measurement.

Press the

The oscilloscope automatically measures the frequency and displays the result on the lower line of the display. The number in parentheses after the word measurement. The oscilloscope retains in memory and displays the three most current measurement results. If you make a fourth measurement, the left-most result is dropped

Time

Freq

Source

Freq

is the number of the channel that the oscilloscope used for the

softkey to select a channel for the frequency

softkey.

2–14

Figure 2–5

Operating You r Oscilloscope

To make frequ ency measurements automatically

Show Meas

If the waveform that show the measurement points for the right-most measurement result. If you select more than one measurement, you can show a previous measurement by reselecting the measurement.

To find the

•

The oscilloscope makes automatic measurements on the first displayed event. Figure 2-5 shows how to use delayed sweep to isolate an event for a frequency measurement. If the measurement is not possible in the delayed time base mode, then the main time base is used. If the waveform is clipped, it may not be possible to make the measurement.

softkey is turned on, cursors are displayed on the

Show Meas

softkey, press the

Next Menu

softkey key.

Delayed ti m e base isolates an event for a frequency m easurement

2–15

Figure 2–6

Operating Your Oscilloscope

To make time measurements au tomatically

To make time measurements automatically

You can measure the following time parameters with the oscilloscope: frequency, period, duty cycle, width, rise time, and fall time. The following exercise guides you through the Time keys by making a rise time measurement. Figure 2-6 shows a pulse with some of the time measurement points.

Connect a signal to the oscilloscope and obtain a stable display.

When the signal has a well-defined top and bottom (see figure 2-8), the rise time and fall time measurements are made at the 10% and 90% levels. If the oscilloscope cannot find a well-defined top or bottom (see figure 2-9), the maximum and minimum levels are used to calculate the 10% and 90% points.

Time Measure m ent Points

2–16

Operating You r Oscilloscope

To make time measurements aut om atically

Press

Time

A softkey menu appears with six softkey choices. Three of the softkeys are time measurement functions.

Source

Selects a channel for the time measurement.

Time Measurements Three time measurement choices are available: Freq (frequency), Period, and Duty Cy (duty cycle). These measurements are made at the 50% levels. Refer to figure 2-6.

Clear Meas

removes the cursors from the display.

Next Menu

Press the

Another time measurement softkey menu appears with six additional choices. Four of the softkeys are time measurement functions.

Show Meas

where the measurement was taken.

(clear measurement) Erases the measurement results and

Replaces the softkey menu with six additional softkey choices.

Next Menu

(show measurement) Displays the horizontal and vertical cursors

softkey.

2–17

Figure 2–7

Operating Your Oscilloscope

To make time measurements automatically

Measurements

Time

Width, −Width, Rise time, and Fall time. Width measurements are

made at the 50% levels, whereas rise time and fall time measurements are made at the 10% to 90% levels.

Previous Menu

Press the

The oscilloscope automatically measures the rise time of the signal and displays the result on the display.

The oscilloscope makes automatic measurements on the first displayed event. Figure 2-7 shows how to use delayed sweep to isolate an edge for a rise time measurement.

Rise Time

Four additional time measurement choices are available;

Returns to the previous softkey menu.

softkey.

Delayed sweep isolates a leading edge for a rise time measurement

2–18

Figure 2–8

Operating You r Oscilloscope

To make voltage measurements automatically

You can measure the following voltage parameters automatically with the oscilloscope: peak-to-peak, average, rms, maximum, minimum, top, and base. The following exercise guides you through the Voltage keys by making an rms voltage measurement. Figures 2-8 and 2-9 show pulses with some of the voltage measurement points.

Figure 2–9

Pulse where the top and bottom are w ell-defined

Pulse where the top and bottom are not well-defined

2–19

Operating Your Oscilloscope

To make voltage measurements automatically

Connect a signal to the oscilloscope and obtain a stable display.

Press

Voltag e

A softkey menu appears with six softkey choices. Three of the softkeys are voltage measurement functions.

Source

Selects a channel for the voltage measurement.

Voltage Measurements Three voltage measurement choices are available:

, V

avg

, and V

p-p

. The measurements are determined by voltage

rms

histograms of the signal. Clear Meas (clear measurement) Erases any measurement results from the

display, and removes the horizontal and vertical cursors from the display.

Next Menu

Press the

Replaces the softkey menu with six additional softkey choices.

softkey.

rms

The oscilloscope automatically measures the rms voltage and displays the result on the display.

The oscilloscope makes automatic measurements on the first pulse or period in the display. Figure 2-10 shows how to use delayed sweep to isolate a pulse for an rms measurement.

2–20

Figure 2–10

Operating You r Oscilloscope

To make voltage measurements automatically

Delayed sw eep isolates an area of i nt erest for an rms volt age measurement

Press the

Next Menu

softkey.

Another voltage measurement softkey menu appears with six additional choices. Four of the softkeys are voltage measurement functions.

Show Meas (show measurement) Displays the horizontal and vertical cursors that show where the measurement was taken on the signal.

Voltage Measurements Four additional voltage measurement choices are

, V

available: V

max

min

top

base

Previous Menu Returns to the previous softkey menu.

2–21

Operating Your Oscilloscope

To make curs or m easurements

To make cursor measurements

The following steps guide you through the front-panel You can use the cursors to make custom voltage or time measurements on the signal. Examples of custom measurements include rise time measurements from reference levels other than 10-90%, frequency and width measurements from levels other than 50%, channel-to-channel delay measurements, and voltage measurements. See figures 2-11 through 2-16 for examples of custom measurements.

Connect a signal to the oscilloscope and obtain a stable display.

Press

A softkey menu appears with six softkey choices. Four of the softkeys are cursor functions.

Source Selects a channel for the voltage cursor measurements.

Active Cursor

while t1, and t2 are time cursors. Use the knob below the Cursors key to move the cursors. When you press the V1 and V2 softkeys simultaneously or the t1 and t2 softkeys simultaneously, the cursors move together.

Clear Cursors

display.

Cursor s

There are four cursor choices: V1, and V2 are voltage cursors,

Erases the cursor readings and removes the cursors from the

Cursor s

key.

2–22

Figure 2–11

Operating You r Oscilloscope

To make curso r m easurements

Cursors used to measure pulse wid th at levels other th en t he 50% points

Figure 2– 12

Cursors used to measure the frequency of the ringing on a pulse

2–23

Figure 2–13

Operating Your Oscilloscope

To make curs or m easurements

Cursors used to make channel-to-channel delay meas urements

Figure 2–14

The cursors track delayed swe ep. Expand the display w it h delayed sweep , then characterize the event of interest with the cursors.

2–24

Figure 2–15

Operating You r Oscilloscope

To make curso r m easurements

Pressing t 1 and t2 softkeys si m ultaneously causes the cursor s t o m ove together wh en t he cursor knob is adjus te d.

Figure 2–16

By moving the cursors together , you can check for pulse w id th variations in a pul se train, as figures 2- 15 and 2-16 show.

2–25

Figure 2–17

Operating Your Oscilloscope

To view asynchronous noise on a signal

The following exercise shows how to use the oscilloscope to view asynchronous noise on a signal that is not synchronous to the period of the waveform.

Connect a noisy signal to the oscilloscope and obtain a stable display.

Figure 2-17 shows a waveform with asynchronous noise at the top of the pulse.

Asynchronous noise at the top of t he pulse

2–26

Operating You r Oscilloscope

To view asynchronous noise on a signal

Figure 2–18

Press

Autost or e

Notice that

STORE

is displayed in the status line.

Set the trigger mode to normal, then adjust the trigger level into the

noise region of the signal.

Decrease the sweep speed for better resolution of the asynchronous noise.

To characterize the asynchronous noise signal, use the cursors.

•

This is a tri ggered view of the as ynchronous noise shown in Figure 2-17

2–27

Figure 2–19

Operating Your Oscilloscope

To reduce the random noise on a signal

If the signal you are applying to the oscilloscope is noisy (figure 2-21), you can set up the oscilloscope to reduce the noise on the waveform (figure 2-22). First, you stabilize the displayed waveform by removing the noise from the trigger path. Second, you reduce the noise on the displayed waveform.

Connect a signal to the oscilloscope and obtain a stable display.

Remove the noise from the trigger path by turning on either high frequency reject or noise reject.

High frequency reject (HF reject) adds a low pass filter with the 3 dB point at 50 kHz (see figure 2-19). You use HF reject to remove high frequency noise such as AM or FM broadcast stations from the trigger path.

0 dB

3 dB down point

Pass Band

50 kHz

HF reject

2–28

Figure 2–20

Operating You r Oscilloscope

To reduce the random noise o n a s ignal

Low frequency reject (LF reject) adds a high pass filter with the 3-dB point at 50 kHz (see figure 2-20). Use LF reject to remove low frequency signals such as power line noise from the trigger path.

0 dB

3 dB down point

Figure 2–21

Pass Band

50 kHz

LF reject

Noise reject increases the trigger hysteresis band. By increasing the trigger hysteresis band you reduce the possibility of triggering on noise. However, this also decreases the trigger sensitivity so that a slightly larger signal is required to trigger the oscilloscope.

Random nois e on t he di splayed waveform

2–29

Figure 2–22

Operating Your Oscilloscope

To reduce the random noise on a signal

Use averaging to reduce noise on the displayed waveform.

To use averaging follow these steps.

Displa y

Press

•

Notice that Av appears in the status line.

Toggle the

•

eliminates the noise from the displayed waveform. The Av initials in the status line indicates how much of the averaging

process is finished, by turning to inverse video as the oscilloscope performs averaging. The higher the number of averages, the more noise that is removed from the display. However, the higher the number of averages, the slower the displayed waveform responds to waveform changes. You need to choose between how quickly the waveform responds to changes and how much noise there is on the signal.

# Averag e

, the press the

softkey to select the number of averages that best

Average

softkey.

On this waveform, 256 averages were used to reduce the noise

2–30

Operating You r Oscilloscope

To save or recall traces

The oscilloscope has two pixel memories for storing waveforms. The following exercise guides you through how to store and recall waveforms from pixel memories.

Connect a signal to the oscilloscope and obtain a stable display.

Press

A softkey menu appears with five softkey selections. Four of the softkeys are trace memory functions.

Trace Selects memory 1 or memory 2.

Trace Mem Save to

is saved to a separate memory location.

Clear Recall Setup

Toggle the

Press the

The current display is copied to the selected memory.

Turn on the

The trace is copied from the selected trace memory and is displayed in half bright video.

Trace

Saves the waveform to the selected memory. The front-panel setup

Erases the selected memory.

Turns on or off the selected memory.

Recalls the front-panel setup that was saved with the waveform.

Trace

softkey to select memory 1 or memory 2.

Save to

softkey.

Trace Mem

softkey to view the stored waveform.

2–31

Operating Your Oscilloscope

To save or recall front-panel setups

The automatic measurement functions do not operate on stored traces. Remember, the stored waveforms are pictorial information rather than stored data.

If you have not changed the oscilloscope setup, use the cursors to make

•

the measurements. If you have changed the oscilloscope setup, press the

•

Then,use the cursors to make the measurements.

Trace memory operating hint The standard oscilloscope has volatile trace memories. When you add an

interface module to the os cillos cope, the trace memorie s b ecome nonvolatile.

Recall Setup

softkey.

To save or recall front-panel setups

There are 16 memories for storing front-panel setups. Saving front-panel setups can save you time in situations where several setups are repeated many times.

Press

To change the selected memory location, press either the left-most

Setup

softkey or turn the knob closest to the Cursors key.

Press the

Recall

2–32

Save

softkey to save a front-panel setup, then press the

softkey to recall a front-panel setup.

Operating You r Oscilloscope

To reset the instrument setup

To reset the instrument to the default factory-preset configuration, press

Setup

Press the

To reset the instrument to the configuration that was present before pressing

Default Setup

Autoscale

, press the

softkey.

Undo Autoscale

softkey.

Table 2-1 Default Setup configuration set ti ngs

Configuration Item Setting

Cursors Cursors off; tim e r eadout is selected ; all cursors are set to time/voltage zero . Trace memories Both trace mem or y 1 and 2 are off; trace 1 mem ory is selected . Setup memories Setup memories are off; setup memory 1 is selected. Graticule Grid set to Full Autostore Off Time base Time referen ce center; main, not de l ayed sweep; main and del ay value 0; 100 µs/div

main time base. Display Vectors On, Display Mode Normal. Channels Cha nnel 1 on, Position 0 V, Vol t s/ D i v 100 mV. Trigger Mode Auto Level, Coupling DC, Reject Off, Noise Reject Off. Trigger Condit i on Rising edge of channel 1

2–33

Operating Your Oscilloscope

To use the XY dis play mode

To use the XY display mode

The XY display mode converts the oscilloscope from a volts versus time

display to a volts versus volts display. You can use various transducers so the

display could show strain versus displacement, flow versus pressure, volts

versus current, or voltage versus frequency. This exercise shows a common

use of the XY display mode by measuring the phase shift between two signals

of the same frequency with the Lissajous method.

Connect a signal to channel 1, and a signal of the same frequency but

out of phase to channel 2.

Press

Autosc al e

, press

softkey.

Center the signal on the display with the Position knobs, and use the

Volts/Div knobs and the vertical

for convenient viewing.

sin θ =

, where θ = phase shift (in degrees) between the two signals.

Main/D el ay ed

Vernier

softkeys to expand the signal

, then press the

Figure 2–23

Phase shift Parameters

2–34

Operating You r Oscilloscope

To use the XY dis play mode

XY display mode operating hint Before entering XY display mode, center both channels on screen in the main

sweep and adjust sweep speed to obtain greater than or equal t o 1 cycle of the lowest frequency input sig nal on screen.

When you sel ect the XY display m ode, the time base is turned off. C hannel 1 is the X-axis i nput, channel 2 is the Y-axis inp ut, and channel 4 (external trigg er i n the HP 54600B and HP 54603B) is the Z-axis input. If you only want to see portions of th e Y versus X display, use the Z-axis input. Z- axis turns on and off the trace (analog oscillos copes called this Z-blan king because it turned the beam on and off). W hen Z is low (<1 . 3 V), Y versus X i s displayed; w hen Z is high (>1.3 V), the t race is turned off .

Figure 2–24

Press

Cursor s

Set the Y2 cursor to the top of the signal, and set Y1 to the bottom of

the signal.

Note the ∆Y value at the bottom of the display. In this example we are using the Y cursors, but you could have used the X cursors instead. If you use the X cursors, make sure you center the signal in the Y axis.

XY Display with Cursors On

2–35

Figure 2– 25

Operating Your Oscilloscope

To use the XY dis play mode

Move the Y1 and Y2 cursors to the center of the signal.

Again, note the ∆Y value.

Y cursors centered

Calculate the phase difference using formula below.

sin θ =

second

first

∆

111.9

∆

= 27.25 degrees of phase shift.

244.4

2–36

Figure 2–26

Operating You r Oscilloscope

To use the XY dis play mode

Signals are 90° ou t of phase

Figure 2–27

Signals are in phase

2–37

Operating Your Oscilloscope

To analyze video wa veform s

To analyze video waveforms

Enhanced TV/Video Trigger (HP 54602B only) This section di scusses basic TV video triggering. If you have Option 005

Enhanced TV/Video Trigger installed in your HP 54602B oscilloscope, refer to Chapter 3 "U sing Option 005 Enhanced TV/Video Trigger."

The TV sync separator in the oscilloscope has an internal clamp circuit. This

removes the need for external clamping when you are viewing unclamped

video signals. TV triggering requires two vertical divisions of display, either

channel 1 or channel 2 as the trigger source, and the selection of internal

trigger. Turning the trigger level knob in TV trigger does not change the

trigger level because the trigger level is automatically set to the sync pulse

tips.

For this exercise we connected the oscilloscope to the video output terminals

on a television. Then we set up the oscilloscope to view these parts of a TV

signal: the second vertical interval with delayed sweep windowed on the

vertical interval test signals (VITS) and the IRE displayed full screen.

Connect a TV signal to channel 1, then press

Autosc al e

Press

Polarity Selects either positive or negative sync pulses.

Field 1

Field 2

Line

HF Rej

2–38

Displa y

Mode

Slope/ Co up li ng

Triggers on the field 1 portion of the video signal. Triggers on the field 2 portion of the video signal.

Triggers on all the TV line sync pulses.

Controls a 500 kHz low pass filter in the trigger path.

, then press the

Peak Det

softkey.

Field 2

softkey.

Figure 2–28

Operating You r Oscilloscope

To analyze video waveforms

Set the time base to 200 µs/div, then center the signal on the display with the delay knob (delay about 800 µs). Press

Main/D el ay ed

, then press the

Set the delayed sweep to 20 µs/div, then set the expanded portion

Delayed

softkey.

over the VITS (delay about 988.8 µs).

Second vertical interval win dowed on the VITS

2–39

Operating Your Oscilloscope

To analyze video wa veform s

Figure 2–29

Press

Use the horizontal vernier to change the time base to 7 µs/div, then

Main/D el ay ed

, then press the

Main

softkey.

center the signal on the display with the delay knob (delay about

989 µs).

Full screen display of the IRE

Delay in TV line units hint HP 54600B-series oscilloscopes with system R OM versions 2.1 and greater hav e

the ability to display delay in TV-line units. Using the TV field trigger mode activates thi s line-counting f eature. When Fiel d 1 or Field 2 i s selected as the trigger source, delay can be set in terms of tim e or line number.

2–40

Operating You r Oscilloscope

To analyze video waveforms

Both-fields t ri ggering hint The HP 54600B-series oscilloscopes can trigger on the vertical sync pulse in

both TV fields at the same time . Thi s al l ow s you to view noninterlaced v i deo signals which are common in today’s comput er m onitors. To tri gger on both sync pulses , press Field 1 and Field 2 at the same time.

TV trigger operating hints The color burs t never really changes phase, i t just looks doub l ed triggered

because its f requency is an odd m ul tiple of one half the line frequency. When looking at live video (usually a field), use peak det ect to improve the

appearance of the display. When making cursor measurem ents, use Auto st ore since you are usually

looking for p ul se flatness and extremes. When using li ne trigger, use mi nimum holdoff to display all t he l i nes. Due to the

relationship between the hori z ontal and vertical sync frequenc i es the display looks like i t is untriggered, but it is very useful for TV wavef orm analysis and adjustment because all of the l i nes are display ed.

2–41

2–42

Using Option 005 Enhanced TV/Video Trigger (HP 54602B)

Using Option 005 Enhanced

TV/Video Trigger

Basic T V/video triggering

This section di scusses Enhanced TV/Video triggering. If you do not have Opti on 005 installed in your oscilloscope, refer to the last section in Chapter 2 "To analyze video waveforms" for basic TV trigg eri ng procedures.

You can use the Option 005 Enhanced TV/Video trigger with your

HP 54602B oscilloscope. One of the first things you will want to do

with your oscilloscope’s new Option 005 Enhanced TV/Video trigger is

to become acquainted with its menu choices. Therefore, we have

written the exercises in this chapter to familiarize you with its basic

controls.

To use the TV/Video trigger, you must be familiar with your

oscilloscope. In summary, the front panel of the oscilloscope has

knobs, grey keys, and white keys. The knobs are used most often and

are similar to the knobs on other oscilloscopes. The grey keys bring

up softkey menus on the display that allow you access to many of the

oscilloscope features. The white keys are instant action keys and

menus are not associated with them. The status line of the

oscilloscope, located at the top of of the display, lets you quickly

determine the setup of the oscilloscope.

When Option 005 is installed in the HP 54602B Oscilloscope, the

Displa y

3–2

menu has the extra

Grid

(graticule) choice of TV.

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

Option 005 gives you an Enhanced TV/Video Trigger for the oscilloscope, allowing highly detailed analysis of TV waveforms. This option offers:

• NTSC, PAL, PAL-M, SECAM and generic video formats

• Video autoscale

• IRE graticule and IRE cursor readout

• Full bandwidth rear panel output

• Trigger output

• Windowed FFT measurements (with Measurement/Storage module)

Now, in one easy-to-use instrument, you can measure your system’s video performance as well as use your oscilloscope for troubleshooting and precision measurements. The oscilloscope’s superior display gives you bright, easily viewed displays of any part of the video waveform. No longer do you need to use a viewing hood or to be constantly adjusting intensity and focus controls.

Analysis of video waveforms is simplified by the oscilloscope’s ability to trigger on any selected line of the video signal. You can make additional measurements using the

Vertical

( you can use the rear-panel, full-bandwidth signal and trigger outputs with a spectrum instrument or frequency counter for additional measurement power.

mode in

GENERIC

standard), or

All lines, Fi e ld 1, Fi e ld 2, All fields

Line

triggering modes. In addition,

3–3

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To select TV di splay grid

To select TV display grid

•

Press

Displa y

, then press the

Grid

softkey until TV is selected.

To autoscale on a video signal

Use a cable to connect a TV signal to channel 1.

Press

select the

To select a TV standard, press

section of the front panel, then press the

the TV standard. Your cho

GENERIC

has been previously selected, you may skip this step.

Press

Mode

in the

TRIGGER

Trigger Mode TV

section of the front panel, and

softkey.

Slope/ Coupli ng

Standard

PAL, SECAM

NTSC

ices are

in the

TRIGGER

softkey to select

GENERIC

, and

is used for other TV/Video standards. If your TV standard

Mode

Provide correct source matchi ng

Many TV sig nal s are produced from 75Ω sources. To provide corre ct matching to these sources, an HP 11094B 75Ω load is included as an accessory. For oscilloscopes that ha ve selectable input impeda nce, the 1 MΩ input should be used with the 75Ω load.

, then press the

Video Autos cale

softkey.

Undo Autoscale

The

to the configuration that was present before pressing

3–4

softkey in the

Setup

menu resets the instrument

Video Autos c ale

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To trigger on a s pecific line of video

To trigger on a specific line of video

TV triggering requires greater than 1/4 division of sync amplitude, either channel 1 or channel 2 as the trigger source. Turning the trigger level knob in TV trigger does not change the trigger level because the trigger level is automatically set to the sync pulse tips.

One example of triggering on a specific line of video is looking at the vertical interval test signals (VITS), which are typically in line 18. Another example is closed captioning, which is typically in line 21.

Select the TV display, TV as the trigger mode, and the appropriate TV standard.

Press panel, then press the number of the line you want to examine by pressing the

Line

Slope/ Coupli ng

in the

Mode

softkey until

TRIGGER

Line

section of the front

appears. Select the

softkey or by rotating the knob closest to the

Trigger On

Cursor s

key.

Press the to trigger on. Your choices are

Trigger On

softkey to select the TV field of the line you want

Field 1, Field 2

, and

Alt Fld

(alternate

fields).

Alternate trig gering

If Alt Fld is selected, the oscilloscope will alter nat ely trigger on the selected lin e number in Fiel d 1 and Field 2. Thi s is a quick w ay to compare the Field 1 VITS and Field 2 VI TS or to check for the correct inser tion of the half lin e at the end of Field 1.

When using choices of

GENERIC

Field 1, Field 2

as the TV standard, the

and

Vertical

Trigger On

softkey gives you the

3–5

Figure 3-1

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To trigger on a s pecific line of video

Triggering on Line 71

Table 3-1 L ine Numbers per Fi eld for Each TV Standard

TV Standard Field 1 Field 2 Alt Fld NTSC 1 to 263 1 to 262 1 to 26 2 PAL 1 to 313 314 t o 625 1 to 313 PAL-M 1 to 313 31 4 to 625 1 to 313 SECAM 1 to 313 314 to 625 1 to 313 GENERIC 1 to 1024 1 to 1024 1 to 1024 (Vertical)

Line Number R epresents Count

In GENERIC mode, the line number represents the number of a count instead of a real line nu m ber. This is refle cted in the label above the softkey changing from Line to Cnt. In the Trigger On selections, Fiel d 1, Field 2 and Vert ical are used to indicate where the counting starts. For an int erl aced TV syste m , the counting starts from the rising edge of the first verti cal serration pulse of Field 1 and/or Field 2. Fo r a non-interlaced TV system, the counting starts after the rising edge of the vertica l sy nc pulse.

3–6

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To trigger on al l TV line sync puls es

To trigger on all TV line sync pulses

To quickly find maximum video levels, you could trigger on all TV line sync pulses. When All Lines is selected as the TV trigger mode, the oscilloscope will trigger on the first line that it finds when the acquisition starts.

Select the TV display, TV as the trigger mode, and the appropriate TV standard as described in the previous section, "To autoscale on a video signal."

Press panel, then press the

Slope/ Coupli ng

Vertical interval can be blocked The 21 lines i n the Vertical In terval can be blocked from this d i splay if the Vert

Rej On mode is select ed. The three color sy nc bursts being displayed ins i de the

white bars ar e on vertical inte rval lines. Th es e could be removed by selection of Vert Rej On.

in the

Mode

softkey until

TRIGGER

All Lines

section of the front

appears.

Figure 3-2

Triggering on All Lines

3–7

Figure 3-3

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To trigger on a s pecific field of the v ideo signal

To trigger on a specific field of the video signal

To examine the components of a video signal, trigger on either Field 1 or

Field 2. When a specific field is selected, the oscilloscope triggers on the

rising edge of the first serration pulse in the vertical sync interval in the

specified field (1 or 2).

Select the TV display, TV as the trigger mode, and the appropriate

TV standard as described in the section, “To autoscale on a video

signal.”

Press

panel, then press the

Slope/ Coupli ng

Mode

in the

TRIGGER

softkey until

section of the front

Field 1

Field 2

appears.

Triggering on Fi el d 1

3–8

Equalizing pulses

Serration pul ses

Figure 3-4

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To trigger on all fields of the v ideo signal

To trigger on all fields of the video signal

To quickly and easily view transitions between fields, or to find the amplitude differences between the fields, use the All Fields trigger. The oscilloscope will trigger on the first field it finds at the start of acquisition.

Select the TV display, TV as the trigger mode, and the appropriate TV standard as described in the section, "To autoscale on a video signal."

Press panel, then press the

Slope/ Coupli ng

Mode

in the

TRIGGER

softkey until

section of the front

All Fields

appears.

Triggering on A ll Fields

3–9

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To trigger on odd or even fields

To check the envelope of your video signals, or to measure worst case

distortion, trigger on the odd or even fields. When Field 1 is selected, the

oscilloscope triggers on color fields 1 or 3. When Field 2 is selected, the

oscilloscope triggers on color fields 2 or 4.

Select the TV display, TV as the trigger mode, and the appropriate TV

standard as described in the section, "To autoscale on a video signal."

Press

panel, then press the

The trigger circuits look for the position of the start of Vertical Sync to

determine the field. But this definition of field does not take into

consideration the phase of the reference subcarrier. When Field 1 is selected,

the trigger system will find any field where the vertical sync starts on Line 4.

In the case of NTSC video, the oscilloscope will trigger on color field 1

alternating with color field 3 (see the following figure). This setup can be

used to measure the envelope of the reference burst.

Slope/ Coupli ng

Mode

in the

TRIGGER

softkey until

section of the front

Field 1

Field 2

appears.

Figure 3-5

Triggering on Col or Field 1 Alter nat i ng with Color Field 3

3–10

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To trigger on odd or even fields

If a more detailed analysis is required, then only one color field should be selected to be the trigger. You can do this by using the oscilloscope’s holdoff control. Using the holdoff settings shown in the following table, the oscilloscope will now trigger on color field 1 OR color field 3 when Field 1 is selected. This is known as odd field selection. Even fields will be selected with Field 2.

Table 3-2

Figure 3-6

Holdoff Settings

Video Standard Fields/Picture Holdoff Range NTSC 4 33.5 ms to 50.0 ms PAL 8 80.7 ms to 120 ms SECAM 4 40.4 ms to 60 ms PAL-M 8 80.4 ms to 120 ms

The holdoff can be more easily set if the sweep speed is set to 5 ms/div. Once you have established your desired holdoff time, return to the desired time base setting. The holdoff setting will remain unchanged.

Triggering on Col or Field 1 using Hol doff

3–11

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To make curs or m easurements

To make cursor measurements

The following steps guide you through the front-panel Cursors key. You can

use the cursors to make custom voltage or time measurements on the signal.

Examples of custom measurements include rise time measurements from

reference levels other than 10-90%, frequency and width measurements from

levels other than 50%, channel-to-channel delay measurements, and voltage

measurements. With Option 005 in your oscilloscope, the cursors can also be

calibrated in IRE units.

Connect a video signal to the oscilloscope and obtain a stable display.

Press

Displa y

, then press the

Grid

softkey to select

Press

A softkey menu appears with six softkey choices. Four of the softkeys are

cursor functions.

Source

calibrated to the Volts/div of the selected channel.

Active Cursor

cursors, t1 and t2 are time cursors. Use the knob below the

press the V1 and V2 softkeys simultaneously or press the t1 and t

softkeys simultaneously.

Clear Cursors

display.

Mode

Cursor s

Selects a channel for the voltage cursor measurements. The cursor is

Cursor s

TV graticule

With the TV grat i cul e ON, the vol tage cursors are c al i brated in IRE units. With the TV grat i cul e OFF, the vol tage cursors are calibrated in v ol ts. IRE units onl y make sense if the video signal i s scaled properl y, such as after a video autoscale.

, then press the

There are four cursor choices: V1 and V2 are voltage

key to move the cursors. To move the cursors together,

Erases the cursor readings and removes the cursors from the

Video Autos cale

softkey.

3–12

Figure 3-7

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To make curso r m easurements

Color Sync measured with the cu rs ors as 40 IRE

3–13

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To use delay ed sweep

To use delayed sweep

Delayed sweep is a magnified portion of the main sweep. You can use

delayed sweep to locate and horizontally expand part of the main sweep for a

more detailed (high resolution) analysis of signals, for example multi-burst

frequencies. The following steps show you how to use delayed sweep.

Notice that the steps are very similar to operating the delayed sweep in

analog oscilloscopes.

Connect a signal to the oscilloscope and obtain a stable display.

Press

Main/D el ay ed

Press the

The screen divides in half. The top half displays the main sweep, and the

bottom half displays an expanded portion of the main sweep. This expanded

portion of the main sweep is called the delayed sweep. The top half also has

two solid vertical lines called markers. These markers show what portion of

the main sweep is expanded in the lower half. The size and position of the

delayed sweep are controlled by the Time/Div and Delay knobs. The

Time/Div next to the symbol is the delayed sweep sec/div. The delay

value is displayed for a short time at the bottom of the display.

To display the delay value of the delayed time base, either

•

press

To change the main sweep Time/Div, you must turn off the delayed sweep.

•

Since both the main and delayed sweeps are displayed, there are half as

many vertical divisions so the vertical scaling is doubled. Notice the changes

in the status line.

To display the delay time of the delayed sweep, either press

•

Main/D el ay ed

displayed near the bottom of the screen.

If the TV graticule is selected, notice that it is presented in both main and

delayed sweeps. For more information on delayed sweep operation, see

"To use delayed sweep" in chapter 2.

Automatic measurements are controlled by the delayed sweep shown in the

following two figures.

Delayed

Main/D el ay ed

softkey.

or turn the delay knob. The delay value is

or turn the Delay knob.

3–14

Figure 3-8

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To use delay ed sweep

Modulated st aircase or 5-step, m easuring sync pulse fall time with delayed sweep

Figure 3-9

Windowed frequency measurement in a multi-burst by use of delayed sweep

3–15

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To analyze video wa veform s with Option 0 05

To analyze video waveforms with Option 005

The combination of the TV trigger, delayed sweep, and automatic

measurements allow this oscilloscope to precisely analyze video waveforms.

There is no need for external clamping to obtain a stable trigger when you

are viewing unclamped video signals. This is because the TV sync separator

in the oscilloscope has an internal clamp circuit in the trigger path. Because

there is no clamp in the vertical path of your oscilloscope, you will be able to

observe any DC level shifts in the video on the oscilloscope display. To

eliminate this position shifting as the DC component of the video changes,

select AC coupling.

For this exercise, we connect the oscilloscope to the video output terminals

on a television. We set up the oscilloscope to view the second vertical

interval with delayed sweep windowed on the vertical interval test signals

(VITS). Then we make windowed measurements with the delayed sweep.

Connect a TV signal to channel 1, and select channel 1 as your trigger

source.

Press

panel, then press the

Select the desired TV

Press

Slope/ Co up li ng

Standard

Mode

, then press the

in the

softkey.

, such as

Video Autos cale

TRIGGER

NTSC, PAL, PAL-M

section of the front

softkey.

SECAM

3–16

Figure 3-10

This figure shows the second ve rt i cal interval test signals displayed with delayed sweep.

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To analyze video waveforms with Option 005

Set the time base to 200 µs/div, then center the signal on the display with the delay knob (delay about 800 µs). Press

Main/D el ay ed

, then press the

Set the delayed sweep to 20 µs/div, then set the expanded portion

Delayed

softkey.

over the VITS (delay about 988.8 µs).

Second VITS Dis pl ayed

3–17

Figure 3-11

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To window in on harmonic distortion using FFT

Sine waves that are not perfectly shaped in the time domain generate

harmonics in the frequency domain. Viewing this distortion in the time

domain is usually very difficult, unless the waveform is severely distorted.

However, in the frequency domain, these harmonics are very apparent. Your

oscilloscope, when used with the HP 54657A, HP 54658A, or HP 54659B

Measurement/Storage module, have the ability to perform frequency domain

analysis on a time domain waveform using the Fast Fourier Transform (FFT).

A special case of measuring the harmonic distortion in a sine wave is found in

video applications. The 3.58 MHz color-subcarrier frequency embedded in an

NTSC composite video signal has some amount of harmonic distortion

associated with the subcarrier frequency. To measure just this signal, the

scope’s time/division and delay controls are used to zoom in on the color

burst in the time domain.

The scope contr ols are used to zoom in on t he color burst in th e tim e domain

3–18

Figure 3-12

Using Opt i on 005 Enhanced T V /Vi deo Trigger (H P 54602B)

To window in on harmonic dist ortion using FFT

The FFT function then shows the harmonic content of the subcarrier in the figure below. Had the time/division and delays controls not been used to zoom in on the desired subcarrier, the entire video signal (with many frequency components) would have appeared in the frequency domain display. These frequency components would have obscured the color subcarrier and its harmonics. This example illustrates a general technique of using the time domain controls of the scope to select specific time intervals for FFT analysis.

The FFT funct io n shows that the har m oni c content of the colo r bus rt i s m ore than 31 dB below t he subcarrier

3–19

Using Option 005 Enhanced TV /Video Trigg er (HP 54602B)

To connect to ot her instruments

To connect to other instruments

The rear panel outputs provide an easy way to connect your Option

005-equipped oscilloscope to other instruments such as spectrum analyzers

or frequency counters. To use a frequency counter:

Connect the vertical output of the oscilloscope to the counter’s input.

Connect the frequency to be measured to channel 1.

Press

channel 1. Adjust the counter as required.

The amplitude of the vertical output signal is proportional to the amplitude as

displayed on the oscilloscope.

The trigger source selection is the control that determines which channel’s

signal is present at the vertical output (

the oscilloscope.

Autosc ale

, then select the trigger source to be

VERT OUT

) connector on the rear of

3–20

Verifying Oscilloscope Performance 4–5 Adjusting the Oscilloscope 4–27 Troubleshooting the Oscilloscope 4–40 Replacing Parts in the Oscilloscope 4–49

Service

If the oscilloscope is under warranty, you must return it to

Hewlett-Packard for all service work covered by the warranty. See

"To return the oscilloscope to Hewlett-Packard," on page 4–4. If the

warranty period has expired, you can still return the oscilloscope to

Hewlett-Packard for all service work. Contact your nearest

Hewlett-Packard Sales Office for additional details on service work.

If the warranty period has expired and you decide to service the

oscilloscope yourself, the instructions in this chapter can help you

keep the oscilloscope operating at optimum performance.

This chapter is divided into the following four sections:

Verifying Oscilloscope Performance on page 4–5

•

Adjusting the Oscilloscope on page 4–27

•

Troubleshooting the Oscilloscope on page 4–40

•

Replacing Parts in the Oscilloscope on page 4–49

•

Service should be performed by trained service personnel only. Some

knowledge of the operating controls is helpful, and you may find it

helpful to read chapter 1, "The Oscilloscope at a Glance."

4–2

Service

Table 4-1 Recommende d li st of test equipment to service the oscilloscope

Equipment Critical sp eci fications Recomm ended Model/Part Use

Constant ampl i t ude signal generator

Digital multimeter 0.1 mV resolution, better than 0.01%

Oscilloscope 100 MHz HP 54600B or eq ui val ent T Power supply 14 mV to 35 Vdc, 0.1 mV resolution HP 6114A P Probe 10:1 division ratio HP 10432A T Pulse generator Rise time < 875 ps PSPL 1107 B TD and PSPL 1110B D river A Pulse generator 10 kHz, 500 m V p-p , r ise time <5 ns HP 8112A A Time marker

generator Feedthrough 50 Ω, BNC (m) and (f) HP 10100C P, A Power splitter Outputs di ffer <0.15 dB HP 11667 B P Shorting cap BNC HP 1250-07 74 P Adapter SMA (f) to BNC (m) HP 1250-1787 A Adapter BNC (f-f) HP 1250-0080 A Adapter BNC tee (m) (f) (f) HP 1250-0781 A Adapter N (m) to BNC (f), Qty 3 HP 1250-0780 P Adapter BNC (f) to dual ba nana (m) HP 1251-2277 P Cable BNC, Qty 3 HP 10503A P, A Cable BNC, 9 inches, Qty 2 HP 10502A A

100 MHz, Co nstant amplitude ±1% (250 MHz for HP 54602)

accuracy

Stability 5 ppm after 1/2 hour TG 501A and TM 503A P

Tek SG503 Tek TM501

HP 34401A P, A, T

Additiona l eq uipment needed if you perform the alternat e bandwidth test w hen verifying osc il l oscope performance.

Signal generator 1 to 100 MHz at 200 mV

(250 MHz for HP 54602B)

Power meter and Power Sensor

Cable Type N (m) 24 inch HP 11500B P Adapter Type N (m) to BNC (m) HP 1251-0082 P

1 to 100 MH z ±3% accuracy (250 MHz for HP 54602B)

HP 8656B opt 001 P

HP 436A and HP 8482A P

4–3

Service

To return the os cilloscope to He wl ett-Packard

To return the oscilloscope to Hewlett-Packard

Before shipping the oscilloscope to Hewlett-Packard, contact your nearest

Hewlett-Packard Sales Office for additional details.

Write the following information on a tag and attach it to the

oscilloscope.

Name and address of owner

•

Model number

•

Serial number

•

Description of service required or failure indications

•

Remove all accessories from the oscilloscope.

The accessories include the power cord, probes, cables, and any modules

attached to the rear of the oscilloscope. Do not ship accessories back to

Hewlett-Packard unless they are associated with the failure symptoms.

Protect the control panel with cardboard.

Pack the oscilloscope in styrofoam or other shock-absorbing material

and place it in a strong shipping container.

You can use either the original shipping containers, or order materials from

an HP Sales Office. Otherwise, pack the oscilloscope in 3 to 4 inches of

shock-absorbing material to prevent movement inside the shipping container.

Seal the shipping container securely.

Mark the shipping container as

FRAGILE

4–4

Verifying Oscilloscope Performance

This section shows you how to verify the electrical performance of the oscilloscope, using the performance characteristics in chapter 5 as the standard. The characteristics checked are dc calibrator, voltage measurement accuracy, bandwidth, horizontal accuracy, and trigger sensitivity.

You should verify the performance of the oscilloscope when you first receive it, and every 12 months or after 2,000 hours of operation. Also, make sure you allow the oscilloscope to operate for at least 30 minutes before you begin the following procedures.

Perform self-calibration first

For the oscilloscope to meet all of the verifications tests in the ambient temperature where it will be used, the self-calibration tests described on page 4–31 should first be performed. Allow the unit to operate for at least 30 minutes before performing the self-calibration.

Each procedure lists the recommended equipment for the test. You can use any equipment that meets the critical specifications. However, the procedures are based on the recommended model or part number.

Starting on page 4–23 is a series of test records (one for each model of osciiloscope) for recording the test results of each procedure. Use the test results to gauge the performance of the oscilloscope over time.

4–5

Service

Verifying Oscilloscope Performance

Table 4-2

To check the output of the

In this test you measure the output of the

The

DC CALIBRATOR

accuracy is not specified, but it must be within the test limits to provide for

accurate self-calibration.

Test limits

Equipment Required

Equipment Critical specifications Recommended

Digital Multimeter 0.1 mV resolution, better than 0.01% accuracy HP 34401A

Cable BNC HP 10503A

Connect a multimeter to the rear panel

Press

Press the

The multimeter should measure 0.00 V dc ± 500 µV. If the result is not

within the test limits, see "Troubleshooting the oscilloscope," on page 4–40.

Press any key to continue the test.

The multimeter should read 5.000 V ±10 mV. If the result is not within the

test limits, see "Troubleshooting the oscilloscope," on page 4–40.

5.000 V ±10 mV and 0.000 V ± 500 µV.

Print/Utility

Self Test

is used for self-calibration of the oscilloscope. The

softkey, then press the

DC CALIBRATOR

softkey.

DAC

with a multimeter.

Model/Part

connector.

4–6

Service

Verifying Oscilloscope Performance

To verify voltage measurement accuracy

In this test you verify the voltage measurement accuracy by measuring the output of a power supply using dual cursors on the oscilloscope, and comparing the results with a multimeter.

Table 4-3

Test limits

1.9% of full scale (HP 54600B, HP 54601B, HP 54602B)

±2.4% of full scale (HP 54603B)

Equipment Re quired

Equipment Critical sp eci fications Recommend ed

Model/Part

Power supply 14 mV to 35 Vdc, 0.1 mV resolution HP 6114A Digital mult i m et er B et ter than 0.1% accuracy HP 34401A Cable BNC, Qty 2 HP 10503A Shorting cap BNC HP 1250-07 74 Adapter BNC (f) to banana ( m ) HP 1251-22 77 Adapter BNC tee (m) (f) (f) HP 1250-0781

4–7

Service

Verifying Oscilloscope Performance

Set up the oscilloscope.

Setup

Press

Voltag e

Press

Set the Volts/Div to the first line of table 4-4.

Adjust the channel 1 Position knob to place the baseline near

(but not at) the bottom of the display.

Press

Using the cursors knob, set the V1 cursor on the baseline.

If you are in an electrically noisy environment, it can help to place a shorting

cap on the input BNC connector when positioning V1.

Connect the power supply to the oscilloscope and to the multimeter,

Cursor s

, then press the

, then press the V1 softkey.

Default Setup

V avg

softkey.

using the BNC tee and cables.

Set the power supply output to the first line in table 4-4.

4–8

Press the V2 softkey, then position the V2 cursor to the baseline.

The ∆V value at the bottom of the display should be within the test limits of table 4-4. If a result is not within the test limits, see "Troubleshooting the Oscilloscope," on page 4–40.

Continue checking the voltage measurement accuracy with the

remaining lines in table 4-4.

Table 4-4 Voltage Measurement Accuracy

Service

Verifying Oscilloscope Performance

Volts/Div setting

5 V/Div 35 V 34.24 V to 35.76 V 34.24 V to 35.76 V 34.04 V to 35.96 V 2 V/Div 14 V 13.70 V to 14.30 V 13.70 V to 14.30 V 13.62 V to 14.38 V 1 V/Div 7 V 6.848 V to 7.152 V 6.848 V to 7.152 V 6.808 V to 7.192 V

0.5 V/Div 3.5 V 3.424 V to 3.576 V 3.424 V to 3.576 V 3.404 V to 3.596 V

0.2 V/Div 1.4 V 1.370 V to 1.430 V 1.370 V to 1.430 V 1.362 V to 1.438 V

0.1 V/Div 700 mV 684.8 mV to 715.2 mV 684.8 mV to 715.2 mV 680.8 mV to 719.2 mV 50 mV/Div 350 mV 342.4 mV to 3 57.6 mV 342.4 mV to 357.6 mV 340.4 mV to 359. 6 mV 20 mV/Div 140 mV 137.0 mV to 1 43.0 mV 137.0 mV to 143.0 mV 136.2 mV to 143. 8 mV 10 mV/Div 70 mV 68.48 mV to 71.52 mV 68.48 mV to 71.52 mV 68.08 mV to 71.92 mV 5 mV/Div*35 mV33.48 mV to 36.52 mV34.24 mV to 35.76 mV33.08 mV to 36.92 mV 2 mV/Div* 14 mV 12.48 mV to 15.52 mV 13.70 mV to 14.30 mV 12.08 mV to 15.92 mV 1 mV/Div** 7 mV — 6.696 mV to 7.304 mV — * Full scale is defined as 8 0 m V for the 5 mV/div and 2 mV/div ranges on HP 54600B, HP 54601B, H P 54603B.

** 1 mV/div range onl y on HP 54602B. Full scal e i s de fined as 16 mV .

Power supply setting

Disconnect the power supply from the oscilloscope, then repeat

Test limits HP 54600B, HP 54601B HP 54602 HP 54603B

steps 1 to 7 for channel 2 (channels 2 to 4 on the HP 54601B and HP 54602B). On the HP 54601B and HP 54602B, channels 3 and 4, check the 0.5 V/div and 0.1 V/div range only.

4–9

Service

Verifying Oscilloscope Performance

To verify bandwidth

In this test you verify the bandwidth of the oscilloscope by using a constant

amplitude signal generator. The frequency of the signal generator is set to

250 kHz to establish a reference level. Then, the frequency is changed to the

upper bandwidth limit and the level is checked to see if it is 3 dB from the

reference level.

The following procedure is a simple method to check bandwidth. However,

there is a possibility of measurement uncertainty with a constant amplitude

signal generator. If you need a more exact procedure for checking bandwidth

see, "To verify the bandwidth (alternate method)" on page 4–12.

Test limits

HP 54600B and HP 54601B, all channels (−3 dB)

dc to 100 MHz

ac coupled 10 Hz to 100 MHz.

HP 54602B

Channels 1 & 2 (–3 dB)

10 mV/div to 5 V/div

dc to 150 MHz

1 mV/div to 5 mV/div

dc to 100 MHz

ac coupled 10 Hz to upper limit of vertical range

Channels 3 & 4 (–3 dB)

dc to 250 MHz.

HP 54603B, all channels (−3 dB)

dc to 60 MHz

ac coupled 10 Hz to 60 MHz.

Table 4-5

Equipment Re quired

Equipment Critical specificat ions Recommended

Constant ampl i t ude

signal generator

Cable BNC HP 10503A

Feedthrough 50

100 MHz, Co nstant amplitude ±1% (250 MHz for HP 54602B)

Ω

, BNC (m) and (f) HP 10100C

Model/Part

Tek SG503/Tek TM501

4–10

Using the 50-Ω feedthrough and the generator to channel 1 of the oscilloscope.

Set the frequency of the signal generator to 250 kHz and the

amplitude to about 800 mV. Press

Autosc al e

Adjust the output of the signal generator for exactly 8 divisions of

vertical deflection. Change the frequency of the signal generator to the value shown

below for your instrument.

Table 4-6 Signal Generator Frequency Setting

Verifying Oscilloscope Performance

cable, connect the signal

BNC

Service

Selected Channel

Channel 1 100 MHz 100 MHz 150 MHz 60 MHz Channel 2 100 MHz 100 MHz 150 MHz 60 MHz Channel 3 — 100 MHz 250 MHz — Channel 4 — 100 MHz 250 MHz —

*1mv/div to 5 mv/div dc = 100 MHz.

Change the sweep speed of the oscilloscope to 5 ns/div and observe

HP 54600B HP 54601B HP 54602B * HP 54603B

the display.

The vertical amplitude of the signal on the display should be equal to or greater than 5.66 divisions (−3 dB point). If the result is not ≤−3 dB, see "Troubleshooting the Oscilloscope," on page 4–40.

Repeat steps 1 through 6 for channel 2 (channels 2 to 4 on the

HP 54601B and HP 54602B).

4–11

Service

Verifying Oscilloscope Performance

To verify bandwidth (alternate method)

In this test you verify the bandwidth of the oscilloscope by using a power

meter and power sensor to set the output of a signal generator at 1 MHz and

the upper bandwidth limit. You use the peak-to-peak voltage at 1 MHz and

the upper bandwidth limit to calculate the bandwidth response of the

oscilloscope.

Test limits

HP 54600B and HP 54601B, all channels (−3 dB)

dc to 100 MHz

ac coupled 10 Hz to 100 MHz.

HP 54602B

Channels 1 & 2 (–3 dB) *

dc to 150 MHz

ac coupled 10 Hz to 150 MHz.

Channels 3 & 4 (–3 dB)

dc to 250 MHz.

HP 54603B, all channels (−3 dB)

dc to 60 MHz

ac coupled 10 Hz to 60 MHz.

Table 4-7

Equipment Re quired

Equipment Critical sp eci fications Recommended Model / Part

Signal generator 1 to 100 MHz at 200 mV

Power meter and

Power Sensor

Power splitt er O ut puts differ by <0. 15 dB HP 116 67B

Cable Type N (m), 24 inch HP 11500B

Adapter Type N (m) to BNC (m) HP 1251-0082

Feedthrough 50 Ω, BNC (m) and (f) HP 10100C

1mv/div to 5 mv/div dc = 100 MHz.

(250 MHz for HP 54602B) 1 to 100 MH z ±3% accuracy

(250 MHz for HP 54602B)

HP 8656B opt 001

HP 436A and HP 8482A

4–12

Agilent 54600B User and Service Guide

Specifications and Main Features

Frequently Asked Questions

User Manual

General-Purpose Oscilloscopes

Accessories supplied

Accessories available

Options available

In This Book

Contents

To inspect the instrument

To clean the instrument

To connect a si gnal to the oscill os cope

To display a signal automatically

To set up the vertical window

To set up the time base

To trigger the oscilloscope

To use roll mode

To use delay ed sweep

To use stora ge oscilloscope operation

To capture a si ngle event

To capture gli tches or narrow pulses

To trigger on a complex waveform

To make frequ ency measurements automatically

To make time measurements au tomatically

To make voltage measurements automatically

To make curs or m easurements

To view asynchronous noise on a signal

To reduce the random noise on a signal

To save or recall traces

To save or recall front-panel setups

To reset the instrument setup

To use the XY dis play mode

To analyze video wa veform s

To select TV di splay grid

To autoscale on a video signal

To trigger on a s pecific line of video

To trigger on al l TV line sync puls es

To trigger on a s pecific field of the v ideo signal

To trigger on all fields of the v ideo signal

To trigger on odd or even fields

To make curs or m easurements

To use delay ed sweep

To analyze video wa veform s with Option 0 05

To window in on harmonic distortion using FFT

To connect to ot her instruments

To return the os cilloscope to He wl ett-Packard

To return the oscilloscope to Hewlett-Packard

Verifying Oscilloscope Performance

To verify voltage measurement accuracy

To verify bandwidth

To verify bandwidth (alternate method)