Agilent Technologies 54657A Specifications

User and
Service Guide
Publication number 54615-97019
June 2000
For Safety Information, Warranties, and Regulatory information,
see the pages behind the index.
© Copyright Agilent Technologies 1993–1996, 2000
All Rights Reserved
Agilent 54615B, 54616B,
and 54616C
Oscilloscopes
A General-Purpose Oscilloscope
The Agilent 54615B, 54616B, and 54616C oscilloscopes offer
exceptional waveform viewing and measurements in a small,
lightweight package. These dual channel, 500 MHz bandwidth
oscilloscopes are designed for use in labs where high speed analog and
digital circuits are being tested. These oscilloscopes give you:
• 1 ns peak detect
• 1 GSa/s sample rate (54615B)
2 GSa/s sample rate (54616B and 54616C)
•
•
•
•
•
500 MHz bandwidth, and 1 ns/div Main and Delayed time bases
Selectable input impedance
Protection of the internal 50 ohm load
Adjustable time nulling to remove the effects of cabling
250 MHz single-shot bandwidth (54615B)
500 MHz single-shot bandwidth (54616B and 54616C)
• Color display (54616C)
These oscilloscopes are very easy to use because of their familiar
controls and real time display. You can discard your viewing hood as
these oscilloscopes have 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. View events ahead of the
trigger using negative time. Cursors and automatic measurements
greatly simplify your analysis tasks.
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.
ii
Accessories supplied
•
•
•
•
Two 1.5 meter, 10:1 Rugged 500 MHz Passive Probes (10073B)
Power cord for country of destination
This User and Service Guide
Programmer’s Guide with Microsoft Windows Help file, ascii help
file, and sample programs.
Accessories available
•
•
•
•
•
•
•
•
•
•
•
•
•
34810B BenchLink/Scope Software
54650A GPIB Interface Module
54652B Serial/Parallel Interface Module
54654A Operator’s Training Kit
54657A GPIB Measurement/Storage Module
54659B Serial/Parallel Measurement/Storage Module
1185A Carrying Case
1186A Rackmount Kit
10020A Resistive Divider (1:1 through 100:1) Passive Probe Kit
10070B 1.5 meter, 1:1 Passive Probe
10076A 100:1 1 MHz High Voltage Passive Divider Probe
N2771A 1000:1 1 MHz High Voltage Passive Divider Probe
1141A 1:1 200 MHz Differential Active Probe. Probe power
accessed directly from oscilloscope rear panel.
• 1144A 10:1 800 MHz Active Probe. Probe power accessed directly
from oscilloscope rear panel.
• 1145A 10:1 750 MHz Small-Geometry Dual Active Probe for surface
mount devices. Probe power accessed directly from oscilloscope
rear panel.
iii
Options available
• Option 001 RS-03 Magnetic Interference Shielding Added to CRT
(54615B and 54616B only)
• Option 002 RE-02 Display Shield Added to CRT (54615B and
54616B only)
•
•
•
•
•
•
•
•
iv
Option 005 Enhanced TV/Video Trigger
Option 101 Accessory Pouch and Front-Panel Cover
Option 103 Operator’s Training Kit (54654A)
Option 104 Carrying Case (1185A)
Option 106 BenchLink/Scope Software (34810B)
Option 090 Deletes Probes
Option 1CM Rackmount Kit
Power Cords (see the table of Replaceable Parts in chapter 4,
Service)
In This Book
This is the User and Service Guide for
the Agilent 54615B, 54616B, and 54616C
Oscilloscopes. This guide contains five
chapters.
First Time Users Chapter 1 is a quick
start guide that gives you a brief
overview of the oscilloscope.
1
The Oscilloscope at a Glance
2
Operating your Oscilloscope
3
Using Option 005 Enhanced
TV/Video Trigger
4
Service
5
Performance Characteristics
Advanced users Chapter 2 is a series
of exercises that guide you through the
operation of the oscilloscope.
Glossary
TV/Video triggering Chapter 3 shows
how to use enhanced TV/Video triggering
if you have Option 005 installed in your
oscilloscope.
Index
Service technicians Chapter 4
contains the service information for the
oscilloscope. There are procedures for
verifying performance, adjusting,
troubleshooting, and replacing
assemblies in the oscilloscope.
Reference information Chapter 5 lists
the characteristics of the oscilloscope.
v
vi
Contents
1 The Oscilloscope at a Glance
To connect a signal to the oscilloscope 1–5
To display a signal automatically 1–7
To set up the vertical window 1–8
To expand the vertical signal 1–10
To set up the time base 1–11
To trigger the oscilloscope 1–13
To use roll mode 1–16
Using Color (54616C only) 1–17
To select the color palettes and observe colors 1–18
To print in color 1–20
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 2–23
To remove cabling errors from time interval measurements 2–27
To view asynchronous noise on a signal 2–28
To reduce the random noise on a signal 2–30
To save or recall traces 2–33
To save or recall front-panel setups 2–34
To reset the instrument setup 2–35
To use the XY display mode 2–36
To analyze video waveforms 2–40
Contents-1
Contents
3 Using Option 005 Enhanced TV/Video Trigger
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
4 Service
To return the oscilloscope to Agilent Technologies 4–4
Verifying Oscilloscope Performance 4–5
To check the output of the CALIBRATOR 4–6
To verify voltage measurement accuracy 4–8
To verify bandwidth 4–10
To verify horizontal ∆t and 1/∆t accuracy 4–13
To verify trigger sensitivity 4–15
To verify Vertical Output on Option 005 4–18
Adjusting the Oscilloscope 4–21
To adjust the power supply 4–22
To perform the self-calibration 4–25
To adjust the high-frequency pulse response 4–27
To adjust the display (54615B/16B only) 4–29
To adjust the Option 005 offset (R15) 4–31
Contents-2
Contents
Troubleshooting the Oscilloscope 4–32
To construct your own dummy load 4–33
To check out the oscilloscope 4–34
To clear error messages 4–37
To check the Low Voltage Power Supply 4–41
To run the internal self-tests 4–42
To troubleshoot Option 005 4–45
Replacing Parts in the Oscilloscope 4–45
To replace an assembly 4–46
To remove the fan 4–47
To remove the front panel 4–47
To remove the display 4–49
To remove the system board 4–49
To remove the attenuator 4–50
To remove and replace an acquisition hybrid 4–51
To remove and replace a hybrid connector 4–53
To remove the power supply 4–54
To remove the keyboard 4–55
To remove the handle 4–56
To remove the Option 005 board 4–56
To order a replacement part 4–57
5 Performance Characteristics
Vertical System 5–2
Horizontal System 5–4
Trigger System 5–5
TV Functions 5–6
XY Operation 5–6
Display System 5–6
Acquisition System 5–7
Contents-3
Contents
Advanced Functions 5–8
Power Requirements 5–8
General (54615B and 54616B only) 5–9
General (54616C only) 5–11
General (54615B, 54616B, and 54616C) 5–12
Option 005 General Performance Characteristics 5–13
Option 005 Trigger System 5–14
Glossary
Index
Contents-4
1
Perform self-calibration first
For the oscilloscope to perform most accurately in the ambient temperature
where it will be used, the self-calibration procedure described on page 4-25
should first be performed. Allow the unit to operate for at least 30 minutes
before performing the self-calibration.
The Oscilloscope at a Glance
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 the
controls you will use most often.
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, Source is the grey front-panel key
labeled Source under the trigger portion of the front panel, and
Line is a softkey. The word Line appears at the bottom of the
display directly above its corresponding softkey.
Figure 1-1 is a diagram of the front panel controls and input
connectors.
Figure 1-2 is a status line example. 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 1-3 is a diagram showing which grey keys to press to bring up
the various softkey menus.
1–2
Figure 1–1
Storage
keys
General
controls
Trigger
controls
External
trigger
control
Channel
controls
External
trigger input
Channel
inputs
Horizontal
controls
Front Panel Controls
Delayed sweep is on, 200 ns/div
Main sweep 500 µs/div
Figure 1–2
Sample rate display
(Main/Delayed)
Channel 2 is on, 4 V/div
Channel 1 is on, ac coupled, inverted, 100 mV/div
Autostore is on
Auto triggered,
positive slope,
trigger source is channel 1
Peak detect is on
Display Status Line Indicators
1–3
Figure 1–3
Press this key
To obtain this menu
Softkey Menu Reference
1–4
Press this key
To obtain this menu
The Oscilloscope at a Glance
To connect a signal to the oscilloscope
To connect a signal to the oscilloscope
The 54615B is a two-channel, 500 MHz bandwidth, 1 GSa/s sample rate
oscilloscope with an external trigger input. The 54616Band 54616C are
two-channel, 500 MHz bandwidth, 2 GSa/s sample rate oscilloscopes with an
external trigger input. The input impedance of these oscilloscopes is
selectable – either 50Ω or 1 MΩ. The 50Ω mode matches 50Ω cables
commonly used in making high frequency measurements. This impedance
matching gives you the most accurate measurements since reflections are
minimized along the signal path. The 1 MΩ mode is for use with probes and
for general purpose measurements. The higher impedance minimizes the
loading effect of the oscilloscope on the circuit under test. 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 250 V (dc plus the peak ac).
For a complete list of the characteristics see chapter 5, "Performance
Characteristics."
CAUTION
CAUTION
Do not exceed 5 Vrms in 50Ω mode. When input protection is enabled in
50Ω mode, the 50Ω load will disconnect if greater than 5 Vrms is detected.
However the inputs could still be damaged, depending on the time constant
of the signal.
The 50Ω input protection mode only functions when the oscilloscope
is powered on.
• Use a cable or a probe to connect a signal to channel 1.
• The oscilloscope has automatic probe sensing . If you are using the
probes supplied with the oscilloscope, or other probes with probe
sensing, then the input impedance and probe attenuation factors will
be automatically set up by the oscilloscope when automatic probe
sensing is turned on. The default setting is to have automatic probe
sensing on. This is indicated by the selection of Auto n under the Probe
softkey, where n is 1, 10, 20, or 100.
• If you are not using automatic probe sensing, then follow these next
two steps.
1–5
The Oscilloscope at a Glance
To connect a signal to the oscilloscope
• To set the input impedance, press
1 . Select the desired Input
impedance of 50Ω or 1MΩ.
• To set the probe attenuation factor press 1 . Select the Next Menu
softkey. Next toggle the Probe softkey to change the attenuation
factor to match the probe you are using.
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.
1 Connect the 10:1 probe from channel 1 to the front-panel probe
compensation signal on the oscilloscope.
2 Press Autoscale .
3 Use a nonmetallic tool to adjust the trimmer capacitor on the probe
for the flattest pulse possible as displayed on the oscilloscope.
Figure 1–4
Overcompensation
causes pulse peaking.
Figure 1–5
Correct compensation
with a flat pulse top.
Figure 1–6
Undercompensation
causes pulse rolloff.
1–6
The Oscilloscope at a Glance
To display a signal automatically
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
0.5%.
When you press Autoscale , the oscilloscope turns on and scales all
channels that have signals applied, and selects a time base range based
on the trigger source. The trigger source is selected from inputs that
have a signal applied. The priority of trigger source assignment is
External Trigger, input 1, then input 2. Autoscale will, in both 50Ω and
1MΩ impedance modes, reset the Coupling to DC, the Bandwidth Limit
(BW Lim) to Off, all Verniers to Off, and Signal Inversion (Invert) to Off.
Input protection in 50Ω mode is not affected by Autoscale.
1 Connect a signal to the oscilloscope.
2 Press Autoscale .
When you press Autoscale , the oscilloscope changes the front-panel
setup to display the signal. However, if you pressed Autoscale
unintentionally, you can use the Undo Autoscale feature. To use this
feature, perform the following step.
• Press
, then press the Undo Autoscale softkey.
The oscilloscope returns to the configuration in effect before you
pressed Autoscale .
Setup
1–7
The Oscilloscope at a Glance
To set up the vertical window
To set up the vertical window
The following exercise guides you through the vertical keys, knobs, and
status line.
1 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.
Measurement hints
If the channel is dc coupled, you can quickly measure the dc component of the
signal by simply noting its distance from the ground symbol.
If the channel is ac coupled, the dc component of the signal is removed allowing
you to use greater sensitivity to display the ac component of the signal.
1–8
The Oscilloscope at a Glance
To set up the vertical window
2 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.
• Press
1
.
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
1
a second time or press the
left-most softkey.
Invert operating hint
When you are triggered on the signal you are inverting, the inversion applies
only to the displayed waveform, not to the trigger signal. Therefore, the trigger
slope of the displayed waveform is inverted from the trigger slope icon diplayed
on the status line.
1–9
The Oscilloscope at a Glance
To expand the vertical signal
To expand the vertical signal
When changing the Volts/Div for analog channels, you can have the signal
expand (or compress) about the center screen or about the ground point.
• To expand the signal about center screen, press
Print/Utility
Then select System Config and Expand Vertical Center.
• To expand the signal about ground, press Print/Utility . Then
select System Config and Expand Vertical Ground.
1–10
.
The Oscilloscope at a Glance
To set up the time base
To set up the time base
The following exercise guides you through the time base keys, knobs, and
status line.
1 Turn the Time/Div knob and notice the change it makes to the status
line.
The Time/Div knob changes the sweep speed from 1 ns to 5 s in a 1-2-5 step
sequence, and the value is displayed in the status line. The sample rate is
also displayed on the status line.
2 Change the horizontal setup and notice that each change affects the
status line differently.
• Press
Main/Delayed
.
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.
1–11
The Oscilloscope at a Glance
To set 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 or
negative time. 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.
1–12
The Oscilloscope at a Glance
To trigger the oscilloscope
To trigger the oscilloscope
The following exercise guides you through the trigger keys, knobs, and status
line.
1 Turn the trigger Level knob and notice the changes it makes to the
display.
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).
2 Change the trigger setup and notice that each change affects the
status line differently.
• Press
Source
.
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.
• Press
External Trigger
.
A softkey menu appears on the display showing the external trigger
choices.
1–13
The Oscilloscope at a Glance
To trigger the oscilloscope
• Press
Mode
.
A softkey menu appears on the display with five trigger mode choices.
• Toggle the Single and TV softkeys and notice that they affect the status
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.
What happens if the oscilloscope loses trigger?
If Auto Level is the trigger mode, Auto flashes in the status line. If dc coupled,
the oscilloscope resets the trigger level to the center of the signal. If ac
coupled, the oscilloscope resets the trigger level to halfway between the
minimum and maximum amplitudes as displayed on the screen. In addition,
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 trigger mode, the trigger setup flashes in the status
line.
1–14
The Oscilloscope at a Glance
To trigger the oscilloscope
• Press
Slope/Coupling
.
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.
• External trigger input coupling (ac or dc) is selected from the External
Trigger menu.
3 Adjust the Holdoff knob and observe how it changes the display.
Holdoff keeps the trigger from rearming for an amount of time that you set.
Holdoff is often used to stabilize the display of complex waveforms. The
Holdoff range is from 300.0 ns to about 13.5 s. When you adjust the Holdoff
knob, the current holdoff time is briefly displayed in inverse video near the
bottom of the display. For an example of using Holdoff, refer to the section,
"To trigger on a complex waveform" on page 2-12.
To set a long holdoff time, go to a slower sweep speed.
The value used to increment the holdoff depends upon the sweep speed or
time/div selection. However, the actual holdoff value is a fixed number; it is not
a percentage of sweep speed. For a time/div setting of 5 ns/div, the holdoff
increment is 50 ns. For a time/div setting of 5 s/div, the holdoff increment is
100 ms.
1–15
The Oscilloscope at a Glance
To use roll mode
To use roll mode
Roll mode continuously moves data across the display from right to left. Roll
mode allows you to see dynamic changes on low frequency signals, such as
when you adjust a potentiometer. Two frequently used applications of roll
mode are transducer monitoring and power supply testing.
1 Press Mode . Then press the Auto Lvl , Auto, or Normal softkey.
2 Press Main/Delayed .
3 Press the Roll softkey.
The oscilloscope is now untriggered and runs continuously. Also notice that
the time reference softkey selection changes to center and right.
4 Press Mode . Then press the Single softkey.
In Single, the oscilloscope fills either 1/2 of the display if Cntr is selected for
the time reference, or 9/10 of the display if Rght is selected for the time
reference, then it searches for a trigger. As soon as a trigger is found, the
display is filled from the reference point (Cntr or Rght) to the right edge of the
display. The oscilloscope then stops acquiring data.
You can also make automatic measurements in the roll mode. If time
measurements are made while the data is rolling, slight errors are incurred
(less than 2%.) The most accurate time measurements are made on rolled
data when the acquisition is stopped.
Roll mode operating hints
• Math functions, averaging, and peak detect are not available in roll mode.
• Holdoff and horizontal delay are not active in roll mode.
• Both a free running (nontriggered) display and a triggered display (available in
the single mode only) are available in roll mode.
• Roll mode is available at sweep speeds of 200 ms/div and slower for the
54615B and 54616B. Roll mode is available at sweep speeds of
500 ms/div and slower for the 54616C.
1–16
Using Color (54616C only)
With the 54616C color oscilloscope, you can select any of the seven
available color palettes to assign colors to channels, cursors, stored
waveforms, and text.
The seven color palettes allow additional customization, which allows
you to easily distinguish between channel waveforms. In addition,
when making measurements on a channel, wherever the channel
number appears on screen, it is highlighted in the selected color.
The color palettes are individually named, and you can choose the
palette that best suits your needs. You can change from the Default
palette to any of the following:
• Alternate 1 works well for people who are colorblind.
• The colors in Alternate 2 are compatible with those used in
545xx-series oscilloscopes.
•
•
•
•
Alternate 3 sets the cursors to yellow.
Inverse 1 works well for hard copies.
Inverse 2 works well for overhead transparencies.
A Monochrome palette is also available.
In each palette, different colors are used for cursors, waveforms,
softkeys, and Autostore. The background is always black, unless you
select the Inverse palettes, which use a white background. Softkeys
and the grid are always in white, except in the Inverse palettes, which
set them to black.
This section shows you how to:
• Select the color palettes and observe colors
• Print in color
1–17
The Oscilloscope at a Glance
To select the color palettes and observe colors
To select the color palettes and observe colors
1 Press Display . The name of the selected palette appears
under the Palette softkey.
2 Press the Palette softkey. Continue to cycle through the palettes and
observe colors applied to the cursors, waveforms, and softkeys.
Notice that the softkeys are white in all palettes, except the Inverse palettes,
where they are black.
3 Press the Grid softkey until Full is displayed.
The graticule is always white, except in the Inverse palettes, where it is black.
4 Toggle the Grid softkey until Frame is displayed.
5 Press Cursors . Press Active Cursor t2 then Active Cursor V2.
A single color shows all the cursors in the display area.
6 Press Autostore . Turn the Position knob both directions on an
active channel and notice the stored waveform.
The autostored waveforms are displayed in blue when using the Default and
Alternate color palettes, cyan in the Inverse color palettes, and white in the
MonoChrome palette.
7 Press Autostore
1–18
to turn it off. Then press Erase .
The Oscilloscope at a Glance
To select the color palettes and observe colors
The following table shows the color palettes and the palette colors mapped to
the display components.
Table 1-1
Color Palettes and Mapping of Colors to Display Components
Palette
Color
Display Component
Palette
Color
Display Component
Default
green
yellow
magenta
cyan
white
white
white
blue
black
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
Alternate 3
yellow
magenta
cyan
green
white
white
white
blue
black
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
Alternate 1
red
cyan
yellow
magenta
white
white
white
blue
black
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
Inverse 1
magenta
red
blue
green
black
black
black
cyan
white
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
Alternate 2
cyan
yellow
green
magenta
white
white
white
blue
black
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
Inverse 2
black
red
blue
magenta
black
black
black
cyan
white
cursors
waveform1
waveform2
functions
overlapping waveforms
softkeys
graticule
autostore
background
In the monochrome palette, all of the display components are in white, except the background, which is black.
1–19
The Oscilloscope at a Glance
To print in color
To print in color
1 Press Print/Utility .
The 54616C can print to an HP DeskJet Color printer when using an Interface
Module with either an RS-232 interface or parallel interface (there are no
color printers with an GPIB interface.)
2 Press the Hardcopy Menu softkey. Then press Format until HP DJColor is
displayed.
This selects the HP DeskJet Color Printer format.
3 If you are using a 54652B or 54659B serial/parallel interface module,
toggle the Destination softkey to either RS-232 or Parallel.
4 Press the Previous Menu softkey, then press the Print Screen softkey.
The current display will be sent out the parallel port to the HP DeskJet color
printer attached to your oscilloscope, and printed in color.
See also
Refer to the Interface Modules for Agilent 54600-Series Instuments I/O
Function Guide for other input/output and printing functions.
1–20
2
Operating Your Oscilloscope
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 your
oscilloscope.
Perform self-calibration first
For the oscilloscope to perform most accurately in the ambient temperature
where it will be used, the self-calibration procedure described on page 4-25
should first be performed. Allow the unit to operate for at least 30 minutes
before performing the self-calibration.
2–2
Operating Your Oscilloscope
To use delayed 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.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Main/Delayed .
3 Press the Delayed softkey.
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
Main/Delayed
or turn the Delay knob.
• To change the main sweep Time/Div, you must turn off the delayed sweep.
Delayed sweep operating hint
When in delayed sweep, the displayed sample rate applies to the main sweep.
The delayed sweep sample rate is always equal to or greater than the main
sweep sample rate. Main and delayed sweeps are obtained in alternate
acquistions.
Single sweep in delayed mode acquires on trigger for main and one trigger for
delayed.
2–3
Operating Your Oscilloscope
To use 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/Delayed or turn the delay knob. The delay value is
displayed near the bottom of the display.
4 Set the time reference (Time Ref) to either left (Lft) or center (Cntr).
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.
Figure 2-1
Delayed sweep
markers
Time reference set to left
2–4
Operating Your Oscilloscope
To use delayed 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.
Figure 2-2
Delayed sweep
markers
Time reference set to center
2–5
Operating Your Oscilloscope
To use storage 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.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Autostore .
Notice that STORE replaces RUN in the status line.
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
2–6
Operating Your Oscilloscope
To use storage oscilloscope operation
3 Using the position knob in the Vertical section of the front panel,
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 2-23.
• To clear the display, press Erase .
• To exit the Autostore mode, press either
Run
or Autostore .
Summary of storage keys
Run – The oscilloscope acquires data and displays the most recent trace.
Stop – The display is frozen.
Autostore – The oscilloscope acquires data, displaying the most recent trace in
full bright and previously acquired waveforms in half bright.
Erase – Clears the display.
2–7
Operating Your Oscilloscope
To capture a single event
To capture a single event
To capture a single event, you need some 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.
1 Connect a signal to the oscilloscope.
2 Set up the trigger.
• Press
• Press
Source
. Select a trigger source with the softkeys.
Slope/Coupling
. Select a trigger slope with the softkeys.
• Turn the Level knob to a point where you think the trigger should work.
3 Press Mode , then press the Single softkey.
4 Press Erase
to clear previous measurements from the display.
5 Press Run .
Pressing the Run key arms the trigger circuit. When the trigger conditions
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.
2–8
Operating Your Oscilloscope
To capture a single event
6 If you need to compare several single-shot events,
press Autostore .
Like the Run key, the Autostore key also arms the trigger circuit. When the
trigger conditions are met, the oscilloscope triggers. Pressing the Autostore
key again rearms the trigger circuit without erasing the display. 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 the Stop key, the oscilloscope will recover the event and restore the
oscilloscope settings.
• To clear the display, press Erase .
• To exit the Autostore mode, press either
Run
or Autostore . Notice that RUN replaces STORE in the status line,
indicating that the oscilloscope has exited the Autostore mode.
Operating hint
With display vectors on, the maximum single-shot bandwidth is:
54615B – 250 MHz for single- and two-channel operation (1 GSa/s, normal
display, display vectors on.)
54616B/16C – 500 MHz for single- and two-channel operation (2 GSa/s,
normal display, display vectors on.)
With display vectors off, the oscilloscopes display the actual captured samples.
2–9
Operating Your Oscilloscope
To capture glitches 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.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Find the glitch.
Use peak detect for narrow pulses or glitches.
• To select peak detect, press
Display
. Next, press the Peak Det
softkey.
Peak detect operates at sweep speeds from 5 s/div to 500 ns/div.
When operating, Pk is displayed in the status line in inverse video. At
sweep speeds faster than 500 ns/div, Pk is displayed in normal video,
which indicates that peak detect is not operating. However, the
acquisition system is sampling at 1 GSa/s so glitches greater than 1 ns
will not be missed.
Peak detect operating hint
In peak detect, the A/D converters are sampling at 1 GSa/s. However, not all
samples are written to the display. Only the min and the max samples in each of
the waveform graticules’s 500 pixel columns are written to the display.
2–10
Operating Your Oscilloscope
To capture glitches or narrow pulses
Autostore operating hints
Use Autostore for the following cases:
• Waveforms that are changing.
• Waveforms that you want to view and compare with stored waveforms.
• Narrow pulses or glitches that occur infrequently.
• Press
Autostore
.
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.
3 Characterize the glitch with delayed sweep.
Peak detect functions in both the main sweep and the delayed sweep. To
characterize the glitch with delayed sweep follow these steps.
• Press
Main/Delayed
. Next press the Delayed softkey.
• 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.
2–11
Operating Your Oscilloscope
To trigger on a complex waveform
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
1-13. If there is no sync pulse, use the following procedure to trigger on a
periodic complex waveform.
1 Connect a signal to the oscilloscope.
2 Set the trigger level to the middle of the waveform.
3 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 adjustment to
reach the exact amount you want.
2–12
Operating Your Oscilloscope
To trigger on a complex waveform
Figure 2-3
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 frequency measurements automatically
To make frequency measurements automatically
The automatic measurement capability of the oscilloscope makes frequency
measurements easy, as the following steps demonstrate.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Time .
A softkey menu appears with six softkey choices.
3 Toggle the Source softkey to select a channel for the frequency
measurement.
4 Press the Freq softkey.
The oscilloscope automatically measures the frequency and displays the
result on the lower line of the display. The number in parentheses after the
word Freq is the number of the channel that the oscilloscope used for the
measurement. The oscilloscope retains in memory and displays the three
most current selected measurements. If you make a fourth measurement,
the left-most is dropped.
2–14
Operating Your Oscilloscope
To make frequency measurements automatically
If the Show Meas softkey is turned on, cursors are displayed on 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 Show Meas softkey, press the Next Menu softkey.
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 horizontal mode, then the main
time base is used. If the waveform is clipped, it may not be possible to
make the measurement.
Figure 2-5
Delayed time base isolates an event for a frequency measurement
2–15
Operating Your Oscilloscope
To make time measurements automatically
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.
1 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.
Figure 2-6
2–16
Operating Your Oscilloscope
To make time measurements automatically
2 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 (clear measurement) Erases the measurement results and
removes the cursors from the display.
Next Menu Replaces the softkey menu with six additional softkey choices.
3 Press the Next Menu softkey.
Another time measurement softkey menu appears with six additional choices.
Four of the softkeys are time measurement functions.
Show Meas (show measurement) Displays the horizontal and vertical
cursors where the measurement was taken.
Time measurement hint
When making time measurements in roll mode, the most accurate results will be
seen when the waveform is stopped.
2–17
Operating Your Oscilloscope
To make time measurements automatically
Time Measurements Four additional time measurement choices are available;
+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 Returns to the previous softkey menu.
4 Press the Rise Time softkey.
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.
Figure 2-7
Delayed sweep isolates a leading edge for a rise time measurement
2–18
Operating Your Oscilloscope
To make voltage measurements automatically
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 2-8
Pulse where the top and bottom are well-defined
Figure 2-9
Pulse where the top and bottom are not well-defined
2–19
Operating Your Oscilloscope
To make voltage measurements automatically
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Voltage .
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:
Vp-p, Vavg, and Vrms The measurements are determined by voltage
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 Replaces the softkey menu with six additional softkey choices.
2–20
Operating Your Oscilloscope
To make voltage measurements automatically
3 Press the Vrms softkey.
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. If a cycle of the waveform cannot be found as shown in the
delayed window in figure 2-10, the measurement is made using the delayed
window as the cycle. Figure 2-10 shows how to use delayed sweep to isolate
a pulse for an rms measurement.
Figure 2-10
Delayed sweep isolates an area of interest for an rms voltage measurement
2–21
Operating Your Oscilloscope
To make voltage measurements automatically
4 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
available: Vmax, Vmin, Vtop, Vbase.
Previous Menu Returns to the previous softkey menu.
2–22
Operating Your Oscilloscope
To make cursor measurements
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. See figures 2-11 through 2-16 for examples of custom
measurements.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Cursors .
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 There are four cursor choices: V1, and V2 are voltage
cursors, 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, both voltage cursors are selected and the
voltage cursors move together. When you press the t1 and t2 softkeys
simultaneously, both time cursors are selected and the time cursors
move together.
Clear Cursors Erases the cursor readings and removes the cursors from the
display.
Toggling the Cursor key to select active cursor
If you toggle the front-panel Cursor key, the active cursor will be toggled. For
example, if V1 is selected, pressing the Cursor key will select V2. Pressing the
cursor key again will select V1.
2–23
Operating Your Oscilloscope
To make cursor measurements
Figure 2-11
Cursors used to measure pulse width at levels other then the 50% points
Figure 2-12
Cursors used to measure the frequency of the ringing on a pulse
2–24
Operating Your Oscilloscope
To make cursor measurements
Figure 2-13
Cursors used to make channel-to-channel delay measurements
Figure 2-14
The cursors track delayed sweep. Expand the display with delayed sweep, then characterize
the event of interest with the cursors.
2–25
Operating Your Oscilloscope
To make cursor measurements
Figure 2-15
Pressing t1 and t2 softkeys simultaneously causes the time cursors to move together when the
cursor knob is adjusted.
Figure 2-16
By moving the time cursors together, you can check for pulse width variations in a pulse train, as
figures 2-15 and 2-16 show.
2–26
Operating Your Oscilloscope
To remove cabling errors from time interval measurements
To remove cabling errors from time interval
measurements
When measuring time intervals in the nanosecond range, small differences in
cable length can totally obscure the measurement. The following exercise
shows how to remove errors that different cable lengths or characteristics
introduce to your measurement. The Skew control makes it possible to
remove this offset error from your measurement.
This process is also referred to as deskewing.
1 Select Time Reference to Center, with the Graticule turned on.
2 Connect the channels to be nulled to a common test point and obtain
a stable display. A fast edge is a good choice.
3 Press Print/Utility , then select the Service Menu softkey, then
the Self Cal Menu softkey. This gives you access to the calibration
and skew adjustments.
4 Select Skew 1 > 2 to adjust channel 2 with respect to channel 1. Rotate
the knob to bring the channels into time alignment. This nullifies the
cable delay.
This adjustment is not affected by pressing Autoscale. If the default setup is
selected or default calibration factors are loaded, the skew value will return to
zero seconds.
2–27
Operating Your Oscilloscope
To view asynchronous noise on a signal
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.
1 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.
Figure 2-17
Asynchronous noise at the top of the pulse
2–28
Operating Your Oscilloscope
To view asynchronous noise on a signal
2 Press Autostore .
Notice that STORE is displayed in the status line.
3 Set the Trigger Mode to Normal, then adjust the trigger level into the noise
region of the signal.
4 Decrease the sweep speed for better resolution of the asynchronous
noise.
• To characterize the asynchronous noise signal, use the cursors.
Figure 2-18
This is a triggered view of the asynchronous noise shown in figure 2-17.
2–29
Operating Your Oscilloscope
To reduce the random noise on a signal
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.
1 Connect a noisy signal to the oscilloscope and press
Autoscale
.
2 Obtain a stable display by removing the noise from trigger path;
press Slope/Coupling , then select either the LF Reject softkey
or the HF Reject softkey.
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.
Figure 2-19
0 dB
3 dB down point
dc
Pass
Band
50 kHz
HF reject (trigger path)
2–30
Operating Your Oscilloscope
To reduce the random noise on a signal
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.
Figure 2-20
0 dB
3 dB down point
Pass
Band
dc
50 kHz
LF reject (trigger path)
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.
Figure 2-21
Random noise on the displayed waveform
2–31
Operating Your Oscilloscope
To reduce the random noise on a signal
3 Use averaging to reduce noise on the displayed waveform.
To use averaging follow these steps.
• Press
Display
, the press the Average softkey.
Notice that Av appears in the status line.
• Toggle the # Average softkey to select the number of averages that best
eliminates the noise from the displayed waveform.
The Av letters in the status line indicate 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.
Figure 2-22
On this waveform, 256 averages were used to reduce the noise
2–32
Operating Your Oscilloscope
To save or recall traces
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.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press
Trace
.
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 Turns on or off the selected memory.
Save to Saves the waveform to the selected memory. The front-panel setup
is saved to a separate memory location.
Clear Erases the selected memory.
Recall Setup Recalls the front-panel setup that was saved with the
waveform.
3 Toggle the Trace softkey to select memory 1 or memory 2.
4 Press the Save to softkey.
The current display is copied to the selected memory.
5 Turn on the Trace Mem softkey to view the stored waveform.
The trace is copied from the selected trace memory and is displayed in half
bright video.
2–33
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 Recall Setup softkey.
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 oscilloscope, the trace memories become nonvolatile.
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.
1 Press Setup .
2 To change the selected memory location, press either the left-most
softkey or turn the knob closest to the Cursors key.
3 Press the Save softkey to save a front-panel setup, then press the Recall
softkey to recall a front-panel setup.
2–34
Operating Your Oscilloscope
To reset the instrument setup
To reset the instrument setup
1 To reset the instrument to the default factory-preset configuration,
press Setup .
2 Press the Default Setup softkey.
3 To reset the instrument to the configuration that was present before
pressing Autoscale, press the Undo Autoscale softkey.
Table 2-1
Default Setup configuration settings
Configuration Item
Cursors
Trace memories
Setting
Cursors off; time readout is selected; all cursors are set to time/voltage zero.
Both trace memory 1 and 2 are off; trace 1 memory is selected.
Setup memories
Graticule
Autostore
Time base
Display
Channels
Trigger Mode
Setup memories are off; setup memory 1 is selected.
Grid set to Full
Off
Time reference center; main, not delayed sweep; main and delay value 0; 100 µs/div
main time base; sample rate is 5 MSa/s.
Vectors On, Display Mode Normal.
Channel 1 on, Position 0 V, Volts/Div 100 mV.
Auto Level, Coupling DC, Reject Off, Noise Reject Off.
Trigger Condition
Rising edge of channel 1
See Also
"To Clear Error Messages" in the troubleshooting section of Service
chapter 4.
2–35
Operating Your Oscilloscope
To use the XY display 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.
1 Connect a signal to channel 1, and a signal of the same frequency but
out of phase to channel 2.
2 Press Autoscale , press Main/Delayed , then press the XY
softkey.
3 Center the signal on the display with the Position knobs, and use the
Volts/Div knobs and the vertical Vernier softkeys to expand the signal
for convenient viewing.
sin θ =
Figure 2-23
2–36
A
C
or , where θ = phase shift (in degrees) between the two signals.
B
D
Operating Your Oscilloscope
To use the XY display 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 to 1 cycle of the
lowest frequency input signal on screen.
When you select the XY display mode, the time base is turned off. Channel 1 is
the X-axis input, channel 2 is the Y-axis input.
4 Press Cursors .
5 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.
Figure 2-24
2–37
Operating Your Oscilloscope
To use the XY display mode
6 Move the Y1 and Y2 cursors to the center of the signal.
Again, note the ∆Y value.
Figure 2-25
7 Calculate the phase difference using formula below.
sin θ =
second ∆Y 143.8
=
300.0
first ∆Y
θ = 28.64 degrees of phase shift
2–38
Operating Your Oscilloscope
To use the XY display mode
Figure 2-26
Signals are 90° out of phase
Figure 2-27
Signals are in phase
2–39
Operating Your Oscilloscope
To analyze video waveforms
To analyze video waveforms
Enhanced TV/Video Trigger
This section discusses basic TV video triggering. If you have Option 005
Enhanced TV/Video Trigger installed in your oscilloscope, refer to Chapter 3
"Using 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 connect the oscilloscope to the video output terminals on a
television. Then set up the oscilloscope to trigger on the start of Field 2. Use
the delayed sweep to window in on the vertical interval test signals (VITS),
which are in Line 18 for most video standards (NTSC, PAL, SECAM).
1 Connect a TV signal to channel 1, then press Autoscale .
2 Press Display , then press the Peak Det softkey.
3 Press Mode , then press the TV softkey.
4 Press Slope/Coupling , then press the Field 2 softkey.
Polarity Selects either positive or negative sync pulses.
Field 1 Triggers on the field 1 portion of the video signal.
Field 2 Triggers on the field 2 portion of the video signal.
Line Triggers on all the TV line sync pulses.
HF Rej Controls a 500 kHz low pass filter in the trigger path.
2–40
Operating Your Oscilloscope
To analyze video waveforms
5 Set the time base to 200 µs/div, then center the signal on the display
with the delay knob (delay about 800 µs).
6 Press Main/Delayed , then press the Delayed softkey.
7 Set the delayed sweep to 20 µs/div, then set the expanded portion
over the VITS (delay about 920 µs, dependent on broadcast channel).
Figure 2-28
Frame 2 windowed on the VITS in Line 18
2–41
Operating Your Oscilloscope
To analyze video waveforms
Delay in TV line units hint
The oscilloscope has the ability to display delay in TV-line units. Using the TV
field trigger mode activates this line-counting feature. When Field 1 or Field 2 is
selected as the trigger source, delay can be set in terms of time or line number.
Both-fields triggering in the oscilloscope hint
The oscilloscope can trigger on the vertical sync pulse in both TV fields at the
same time. This allows you to view noninterlaced video signals which are
common in computer monitors. To trigger on both sync pulses, press Field 1 and
Field 2 at the same time.
TV trigger operating hints
The color burst changes phase between odd (Fields 1 and 3) and even (Fields 2
and 4). It looks double-triggered. Increase the holdoff to greater than the frame
width to fine tune your trigger stability. For example, use a holdoff value of
around 63 ms for NTSC, and around 76 ms for PAL.
When looking at live video (usually a field), use peak detect to improve the
appearance of the display.
When making cursor measurements, use Autostore since you are usually
looking for pulse flatness and extremes.
When using line trigger, use minimum holdoff to display all the lines. Due to the
relationship between the horizontal and vertical sync frequencies the display
looks like it is untriggered, but it is very useful for TV waveform analysis and
adjustment because all of the lines are displayed.
2–42
3
Using Option 005 Enhanced
TV/Video Trigger
Using Option 005 Enhanced
TV/Video Trigger
Basic TV/video triggering
This section discusses Enhanced TV/Video triggering. If you do not have Option
005 installed in your oscilloscope, refer to the last section in Chapter 2 "To
analyze video waveforms" for basic TV triggering procedures.
You can use the Option 005 Enhanced TV/Video trigger with your
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 your oscilloscope, the Display
menu has the extra Grid (graticule) choice of TV.
Use NTSC Instead of PAL-M
To trigger on a PAL-M signal, use NTSC. The line and field rates are identical.
3–2
Using Option 005 Enhanced TV/Video Trigger
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 All lines, Field 1, Field 2, All fields
(Vertical mode in GENERIC standard), or Line triggering modes. In addition,
you can use the rear-panel, full-bandwidth signal and trigger outputs with a
spectrum instrument or frequency counter for additional measurement
power.
3–3
Using Option 005 Enhanced TV/Video Trigger
To select TV display grid
To select TV display grid
• Press
Display
, then press the Grid softkey until TV is selected.
To autoscale on a video signal
1 Use a cable to connect a TV signal to channel 1.
2 Press
Mode in the TRIGGER section of the front panel, and
select the Trigger Mode TV softkey.
3 To select a TV standard, press Slope/Coupling in the TRIGGER
section of the front panel, then press the Standard softkey to select
the TV standard. Your choices are NTSC, PAL, SECAM, and GENERIC.
GENERIC is used for other TV/Video standards. If your TV standard
has been previously selected, you may skip this step.
Use NTSC Instead of PAL-M
To trigger on a PAL-M signal, use NTSC. The line and field rates are identical.
4 Press
Mode
, then press the Video Autoscale softkey.
Provide correct source matching
Many TV signals are produced from 75Ω sources. To provide correct matching
to these sources, an 11094B 75Ω load is included as an accessory. For
oscilloscopes that have selectable input impedance, the 1 MΩ input should be
used with the 75Ω load.
The Undo Autoscale softkey in the Setup menu resets the instrument
to the configuration that was present before pressing Video Autoscale.
3–4
Using Option 005 Enhanced TV/Video Trigger
To trigger on a specific 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.
1 Select the TV display, TV as the trigger mode, and the appropriate
TV standard.
2 Press
Slope/Coupling in the TRIGGER section of the front
panel, then press the Mode softkey until Line appears. Select the
number of the line you want to examine by pressing the Trigger On
Line softkey or by rotating the knob closest to the Cursors key.
3 Press the Trigger On softkey to select the TV field of the line you want
to trigger on. Your choices are Field 1, Field 2, and Alt Fld (alternate
fields).
Alternate triggering
If Alt Fld is selected, the oscilloscope will alternately trigger on the selected line
number in Field 1 and Field 2. This is a quick way to compare the Field 1 VITS
and Field 2 VITS or to check for the correct insertion of the half line at the end of
Field 1.
When using GENERIC as the TV standard, the Trigger On softkey gives you the
choices of Field 1, Field 2 and Vertical.
3–5
Using Option 005 Enhanced TV/Video Trigger
To trigger on a specific line of video
Figure 3-1
Triggering on Line 71
Table 3-1
Line Numbers per Field for Each TV Standard
TV Standard
NTSC
PAL
SECAM
GENERIC
Field 1
1 to 263
1 to 313
1 to 313
1 to 1024
Field 2
1 to 262
314 to 625
314 to 625
1 to 1024
Alt Fld
1 to 262
1 to 313
1 to 313
1 to 1024 (Vertical)
Line Number Represents Count
In GENERIC mode, the line number represents the number of a count instead of
a real line number. This is reflected in the label above the softkey changing from
Line to Cnt. In the Trigger On selections, Field 1, Field 2 and Vertical are used to
indicate where the counting starts. For an interlaced TV system, the counting
starts from the rising edge of the first vertical serration pulse of Field 1 and/or
Field 2. For a non-interlaced TV system, the counting starts after the rising edge
of the vertical sync pulse.
3–6
Using Option 005 Enhanced TV/Video Trigger
To trigger on all TV line sync pulses
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.
1 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."
2 Press Slope/Coupling in the TRIGGER section of the front
panel, then press the Mode softkey until All Lines appears.
Vertical interval can be blocked
The 21 lines in the Vertical Interval can be blocked from this display if the Vert
Rej On mode is selected. The three color sync bursts being displayed inside the
white bars are on vertical interval lines. These could be removed by selection of
Vert Rej On.
Figure 3-2
Triggering on All Lines
3–7
Using Option 005 Enhanced TV/Video Trigger
To trigger on a specific field of the video 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).
1 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.”
2 Press Slope/Coupling in the TRIGGER section of the front
panel, then press the Mode softkey until Field 1 or Field 2 appears.
Figure 3-3
Equalizing pulses
Triggering on Field 1
3–8
Serration pulses
Using Option 005 Enhanced TV/Video Trigger
To trigger on all fields of the video 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.
1 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."
2 Press Slope/Coupling in the TRIGGER section of the front
panel, then press the Mode softkey until All Fields appears.
Figure 3-4
Triggering on All Fields
3–9
Using Option 005 Enhanced TV/Video Trigger
To trigger on odd or even fields
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.
1 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."
2 Press Slope/Coupling in the TRIGGER section of the front
panel, then press the Mode softkey until Field 1 or Field 2 appears.
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.
Figure 3-5
Triggering on Color Field 1 Alternating with Color Field 3
3–10
Using Option 005 Enhanced TV/Video Trigger
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
Holdoff Settings
Video Standard
NTSC
PAL
SECAM
PAL-M
Fields/Picture
4
8
4
8
Holdoff Range
33.5 ms to 50.0 ms
80.7 ms to 120 ms
40.4 ms to 60 ms
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.
Figure 3-6
Triggering on Color Field 1 using Holdoff
3–11
Using Option 005 Enhanced TV/Video Trigger
To make cursor measurements
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.
1 Connect a video signal to the oscilloscope and obtain a stable display.
2 Press Display , then press the Grid softkey to select TV.
3 Press Mode , then press the Video Autoscale softkey.
4 Press Cursors .
A softkey menu appears with six softkey choices. Four of the softkeys are
cursor functions.
Source Selects a channel for the voltage cursor measurements. The cursor is
calibrated to the Volts/div of the selected channel.
Active Cursor There are four cursor choices: V1 and V2 are voltage
cursors, t1 and t2 are time cursors. Use the knob below the
Cursors key to move the cursors. To move the cursors together,
press the V1 and V2 softkeys simultaneously or press the t1 and t2
softkeys simultaneously.
Clear Cursors Erases the cursor readings and removes the cursors from the
display.
TV graticule
With the TV graticule ON, the voltage cursors are calibrated in IRE units.
With the TV graticule OFF, the voltage cursors are calibrated in volts.
IRE units only make sense if the video signal is scaled properly, such as after a
video autoscale.
3–12
Using Option 005 Enhanced TV/Video Trigger
To make cursor measurements
Figure 3-7
Color Sync measured with the cursors as 40 IRE
3–13
Using Option 005 Enhanced TV/Video Trigger
To use delayed 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.
1 Connect a signal to the oscilloscope and obtain a stable display.
2 Press Main/Delayed .
3 Press the Delayed softkey.
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
Main/Delayed
or turn the Delay knob.
• 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/Delayed or turn the delay knob. The delay value is
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, refer to
"To use delayed sweep" in chapter 2.
Automatic measurements are controlled by the delayed sweep shown in the
following two figures.
3–14
Using Option 005 Enhanced TV/Video Trigger
To use delayed sweep
Figure 3-8
Modulated staircase or 5-step, measuring 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 Trigger
To analyze video waveforms with Option 005
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.
1 Connect a TV signal to channel 1, and select channel 1 as your trigger
source.
2 Press Slope/Coupling in the TRIGGER section of the front
panel, then press the TV softkey.
3 Select the desired TV Standard, such as NTSC, PAL, or SECAM.
Use NTSC instead of PAL-M
To trigger on a PAL-M signal, use NTSC. The line and field rates are identical.
4 Press
3–16
Mode
, then press the Video Autoscale softkey.
Using Option 005 Enhanced TV/Video Trigger
To analyze video waveforms with Option 005
5 Set the time base to 200 µs/div, then center the signal on the display
with the delay knob (delay about 800 µs).
6 Press Main/Delayed , then press the Delayed softkey.
7 Set the delayed sweep to 20 µs/div, then set the expanded portion
over the VITS (delay about 988.8 µs).
Figure 3-10
This figure shows the
second vertical
interval test signals
displayed with delayed
sweep.
Second VITS Displayed
3–17
Using Option 005 Enhanced TV/Video Trigger
To window in on harmonic distortion using FFT
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 54657A, 54658A, or 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.
Figure 3-11
The scope controls are used to zoom in on the color burst in the time domain
3–18
Using Option 005 Enhanced TV/Video Trigger
To window in on harmonic distortion 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.
Figure 3-12
The FFT function shows that the harmonic content of the color busrt is more than 31 dB below the
subcarrier
3–19
Using Option 005 Enhanced TV/Video Trigger
To connect to other 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:
1 Connect the vertical output of the oscilloscope to the counter’s input.
2 Connect the frequency to be measured to channel 1.
3 Press Autoscale , then select the trigger source to be
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 (VERT OUT) connector on the rear of
the oscilloscope.
3–20
4
Verifying Oscilloscope Performance 4–5
Adjusting the Oscilloscope 4–21
Troubleshooting the Oscilloscope 4–32
Replacing Parts in the Oscilloscope 4–45
Service
Service
If the oscilloscope is under warranty, you must return it to Agilent
Technologies for all service work covered by the warranty. See "To
return the oscilloscope to Agilent Technologies" on page 4-4. If the
warranty period has expired, you can still return the oscilloscope to
Agilent Technologies for all service work. Contact your nearest
Agilent Technologies 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 4-21
Troubleshooting the Oscilloscope on page 4-32
Replacing Parts in the Oscilloscope on page 4-45. 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
Recommended list of test equipment to service the oscilloscope
Equipment
Critical specifications
Recommended Model/Part
Use1
Signal generator
1 to 500 MHz at 200 mV
high stability timebase
0.1 mV resolution, better than 0.01%
accuracy
100 MHz, 1 MΩ input R
1 to 500 MHz ±3% accuracy
Agilent 8656B Option 001
P
Agilent 34401A
P, A, T
Agilent 54600
Agilent 436A and Agilent 8482A
P, T
P
14 mV to 35 Vdc, 0.1 mV resolution
Rise time ≤ 700 ps
Outputs differ < 0.15 dB
BNC
Stability 5 ppm after 30 minutes
Agilent 6114A
Agilent 8131A
Agilent 11667B
Agilent 1250-0774
Tektronix TG501A and TM503B
P
A
P
P
P
Compatible with power supply
SMA (f) to BNC (m)
BNC (f-f)
BNC tee (m) (f) (f)
N (m) to BNC (f), Qty 3
BNC (f) to dual banana (m)
Type N (m) to BNC (m)
BNC, Qty 3
BNC, 9 inches, Qty 2
Type N (m) 24 inch
BNC (m) to dual banana post
see note 2 below
Agilent 1250-1787
Agilent 1250-0080
Agilent 1250-0781
Agilent 1250-0780
Agilent 1251-2277
Agilent 1251-0082
Agilent 10503A
Agilent 10502A
Agilent 11500B
Agilent 10110B
A
A
P, A
P, A
P
P
P
P, A
P, A
P
P
Digital multimeter
Oscilloscope
Power meter and
Power sensor
Power supply
Pulse generator
Power splitter
Shorting cap
Time Mark
Generator
Dummy load 2
Adapter
Adapter
Adapter
Adapter
Adapter
Adapter
Cable
Cable
Cable
Adapter 3
1
2
3
P = Use for Performance Verification.
A = Use for Adjustments.
T = Use for Troubleshooting.
See page 4-33 to construct your own dummy load.
Used for Option 005 only
4-3
Service
To return the oscilloscope to Agilent Technologies
To return the oscilloscope to Agilent Technologies
Before shipping the oscilloscope to Agilent Technologies, contact your
nearest Agilent Technologies Sales Office for additional details.
1 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
2 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
Agilent Technologies unless they are associated with the failure symptoms.
3 Protect the control panel with cardboard.
4 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 Agilent Technologies Sales Office. Otherwise, pack the oscilloscope in 3
to 4 inches of shock-absorbing material to prevent movement inside the
shipping container.
5 Seal the shipping container securely.
6 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 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
4-25 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.
On page 4-19 of this chapter is a test record 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
To check the output of the CALIBRATOR
In this test you measure the output of the rear-panel CALIBRATOR output with
a multimeter and an oscilloscope. The CALIBRATOR is used for
self-calibration of the 54615B, 54616B, and 54616C. The accuracy of the
CALIBRATOR is not specified, but it must be within the test limits to provide
for accurate self-calibration.
The CALIBRATOR output produces dc voltages between 0 and 5V during
vertical calibration, and a square wave during delay calibration.
Test limits:
DC calibrator:
5.000 V ±10 mV and 0.000 V ± 500 µV
Delay calibrator: Vp-p = 900 mV ± 150 mV
Vavg = –450 mV ± 75 mV
Frequency = 2.46 kHz ± 100 Hz (54615B/16B)
2.08 kHz ± 100 Hz (54616C)
Table 4-2
Equipment Required
Equipment
Critical specifications
Digital Multimeter
Cable
Oscilloscope
0.1 mV resolution, better than 0.01% accuracy
BNC
100 MHz, 1 MΩ input R
Recommended
Model/Part
Agilent 34401A
Agilent 10503A
Agilent 54600
1 Connect a multimeter to the rear-panel CALIBRATOR connector.
2 Press
Print/Utility
.
3 Press the Service Menu softkey, then the Self Test softkey, and then the
DAC softkey.
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 4-32.
4-6
Service
Verifying Oscilloscope Performance
4 Press any key once to advance 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 4-32.
5 Connect an oscilloscope to the rear-panel CALIBRATOR connector.
6 Press any key once to advance the test.
7 Obtain a stable display on the oscilloscope.
8 Measure Vp--p, Vavg, and the frequency of the signal.
If the results are not within the Delay Calibrator test limits stated above, see
"Troubleshooting the oscilloscope," on page 4-32.
9 Press any key once to end this test.
4-7
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.
Test limits: ±2.4% of full scale*
* Full scale is defined as 56 mV on the 5 mV/div and 2 mV/div ranges. Full scale on all
other ranges is defined as 8 divisions times the V/div setting.
Table 4-3
Equipment Required
Equipment
Critical specifications
Power supply
Digital multimeter
Cable
Shorting cap
Adapter
Adapter
14 mV to 35 Vdc, 0.1 mV resolution
Better than 0.01% accuracy
BNC, Qty 2
BNC
BNC (f) to banana (m)
BNC tee (m) (f) (f)
Recommended
Model/Part
Agilent 6114A
Agilent 34401A
Agilent 10503A
Agilent 1250-0774
Agilent 1251-2277
Agilent 1250-0781
1 Set up the oscilloscope.
a Press Setup , then press the Default Setup softkey.
b Adjust the channel 1 Position knob to place the baseline at
approximately 0.5 division from the bottom of the display.
c Set the Volts/Div to the first line of table 4-4.
d Press Display , press the Average softkey, then set # Average
softkey to 64. Wait a few seconds for the measurement to settle; the
Av letters in the status line indicate how much of the averaging
process is finished by turning to inverse video as the oscilloscope
performs averaging.
2 Press Cursors , then press the V1 softkey.
3 Using the cursors knob, set the V1 cursor on the baseline of the
signal.
4-8
Service
Verifying Oscilloscope Performance
4 Connect the power supply to the oscilloscope and to the multimeter,
using the BNC tee and cables.
5 Adjust the power supply output so that the multimeter reading
displays the first Power supply setting value in table 4-4.
Wait a few seconds for the measurment to settle.
6 Press the V2 softkey, then position the V2 cursor to the baseline.
The ∆V value on the lower line 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- 32.
7 Continue checking the voltage measurement accuracy with the
remaining Power supply setting lines in table 4-4.
Table 4-4
Voltage Measurement Accuracy
Volts/Div setting
5 V/Div
2 V/Div
1 V/Div
0.5 V/Div
0.2 V/Div
0.1 V/Div
50 mV/Div
20 mV/Div
10 mV/Div
5 mV/Div*
2 mV/Div*
Power supply setting
35 V
14 V
7V
3.5 V
1.4 V
700 mV
350 mV
140 mV
70 mV
35 mV
14 mV
Test limits
34.04 V
13.616 V
6.808 V
3.404 V
1.3616 V
680.8 mV
340.4 mV
136.16 mV
68.08 mV
33.66 mV
12.66 mV
to
to
to
to
to
to
to
to
to
to
to
35.96 V
14.384 V
7.192 V
3.596 V
1.4384 V
719.2 mV
359.6 mV
143.84 mV
71.92 mV
36.34 mV
15.34 mV
*Full scale is defined as 56 mV on the 5 mV/div and 2 mV/div ranges.. Full scale on all
other ranges is defined as 8 divisions.
8 Disconnect the power supply from the oscilloscope, then repeat
steps 1 to 7 for channel 2.
4-9
Service
Verifying Oscilloscope Performance
To verify bandwidth
In this test you verify bandwidth by using a power meter and power sensor to
set output of a signal generator at 1 MHz and at 500 MHz. You use the
peak-to-peak voltage at 1 MHz and at 500 MHz to verify the bandwidth
response of the oscilloscope.
Test limits:
all channels (±3 dB)1
dc to 500 MHz
ac coupled 10 Hz to 500 MHz.
1
Table 4-5
Upper bandwidth reduced 2MHz per degree C above 35 °C.
Equipment Required
Equipment
Signal generator
Power meter and
Power Sensor
Power splitter
Cable
Adapter
4-10
Critical specifications
1 to 500 MHz at 200 mV
1 to 500 MHz ±3% accuracy
Outputs differ by < 0.15 dB
Type N (m), 24 inch
Type N (m) to BNC (m)
Recommended Model/Part
Agilent 8656B opt 001
Agilent 436A and Agilent
8482A
Agilent 11667B
Agilent 11500B
Agilent 1251-0082
Service
Verifying Oscilloscope Performance
1 Connect the equipment.
a Connect the signal generator to the input of the power splitter.
b Connect the power sensor to one output of the power splitter, and
connect channel 1 of the oscilloscope to the other power splitter
output. Set the oscilloscope input impedance to 50Ω.
2 Set up the oscilloscope.
a Press Setup , then press the Default Setup softkey.
b Set the time base to 500 ns/div.
c Press 1 to select channel 1, then select 50Ω input and 20 mV/div.
d Press Display , then press the Average softkey.
e Toggle the # Average softkey to select 8 averages.
3 Set the signal generator for 1 MHz at about –8.4 dBm.
Notice that the signal on the display is about 5 cycles and six divisions of
amplitude.
4 Press Voltage , then press the Vp-p softkey.
Wait a few seconds for the measurement to settle (averaging is complete),
then note the Vp-p reading from the bottom of the display.
Vp-p = _______ mV.
5 Set the calibration factor percent of the power meter to the 1 MHz
value from the calibration chart on the probe, then press dB (REF)
on the power meter to set a 0 dB reference.
6 Change the frequency of the signal generator to 500 MHz
7 Set the calibration factor of the power meter to the 500 MHz percent
value from the chart on the probe (interpolate the value between 300
MHz and 1 GHz if necessary.)
Adjust the amplitude of the signal generator for a power reading as close as
possible to 0.0 dB (REL). Power meter reading = ______ dB.
4-11
Service
Verifying Oscilloscope Performance
8 Change the time base to 5 ns/div.
Wait a few seconds for the measurement to settle (the Av letters in the status
line indicate how much of the averaging process is finished by turning to
inverse video as the oscilloscope performs averaging), then note the Vp-p
reading from the bottom of the display.
Vp-p = ______ mV.
9 Calculate the response using the following formula.
step 8 result 
20 log10 

 step 4 result
10 Correct the result from step 9 with any difference in the power meter
reading from step 7. Make sure you observe all number signs.
For example
Result from step 9 = –2.3 dB
Power meter reading from step 7 = –0.2 dB (REL)
True response = (–2.3) – (–0.2) = –2.1 dB
The true response should be ≤ ±3 dB.
If the result is not ≤ ±3 dB, see "Troubleshooting the Oscilloscope," on page
4-32.
11 Repeat steps 1 to 10 for channel 2.
4-12
Service
Verifying Oscilloscope Performance
To verify horizontal ∆t and 1/∆t accuracy
In this test you verify the horizontal ∆t and 1/∆t accuracy by measuring the
output of a time mark generator with the oscilloscope.
Test limits: ±0.005% ±0.2% of full scale ±100 ps (same channel)
Table 4-6
Equipment Required
Equipment
Time marker generator
Cable
Critical specifications
Stability 5 ppm after 1/2 hour
BNC, 3 feet
Recommended Model/Part
TG 501A and TM 503B
Agilent 10503A
1 Connect the time mark generator to channel 1. Then, set the time
mark generator for 0.1 ms markers.
2 Setup the oscilloscope.
a Press Setup , then press the Default Setup softkey.
b Press 1 , then toggle Input softkey to 50W.
c Press Autoscale .
d Set the time base to 20 µs/div.
e Press Main/Delayed , then press the Time Ref Lft softkey.
f Adjust the trigger level to obtain a stable display.
3 Press Time , then press the Freq and Period softkeys.
You should measure the following:
Frequency 10 kHz, test limits are 9.96 kHz to 10.04 kHz.
Period 100 µs, test limits are 99.59 µs to 100.41 µs.
If the measurements are not within the test limits, see "Troubleshooting the
Oscilloscope," on page 4-32.
4 Change the time mark generator to 1 µs, and change the time base to
200 ns/div. Adjust the trigger level to obtain a stable display.
4-13
Service
Verifying Oscilloscope Performance
5 Press Time , then press the Freq and Period softkeys.
You should measure the following:
Frequency 1 MHz, test limits are 995.8 kHz to 1.0042 MHz.
Period 1 µs, test limits are 995.9 ns to 1.004 µs.
If the measurements are not within the test limits, see "Troubleshooting the
Oscilloscope," on page 4-32.
6 Change the time mark generator to 20 ns, and change the time base to
5 ns/div. Adjust the trigger level to obtain a stable display.
7 Press Time , then press the Freq and Period softkeys.
You should measure the following:
Frequency 50 MHz, test limits are 49.50 MHz to 50.51 MHz.
Period 20 ns, test limits are 19.80 ns to 20.20 ns.
If the measurements are not within the test limits, see "Troubleshooting the
Oscilloscope," on page 4-32.
8 Change the time mark generator to 2 ns, and change the time base to
1 ns/div. Adjust the trigger level to obtain a stable display.
9 Press Time , then press the Freq and Period softkeys.
You should measure the following:
Frequency 500 MHz, test limits are 471.67 MHz to 531.94 MHz.
Period 2 ns, test limits are 1.880 ns to 2.120 ns.
If the measurements are not within the test limits, see "Troubleshooting the
Oscilloscope," on page 4-32.
4-14
Service
Verifying Oscilloscope Performance
To verify trigger sensitivity
In this test you verify the trigger sensitivity by applying 100 MHz to the
oscilloscope. The amplitude of the signal is decreased to the specified levels,
then you check to see if the oscilloscope is still triggered. You then repeat
the process at the upper bandwidth limit.
Test limits:
Table 4-7
Internal trigger
dc to 100 MHz:
100 MHz to 500 MHz:
0.5 div or 5.0 mV p-p
1 div or 10 mV p-p
External trigger
dc to 100 MHz:
100 MHz to 500 MHz:
<75 mV p-p
<150 mV p-p
Equipment Required
Equipment
Critical specifications
Signal generator
100 MHz and 500 MHz sine waves
Power splitter
Cable
Adapter
Power meter and
Power sensor
Outputs differ < 0.15 dB
BNC, Qty 3
N (m) to BNC (f), Qty 3
1 to 500 MHz ±3%
Recommended
Model/Part
Agilent 8656B
Option 001
Agilent 11667B
Agilent 10503A
Agilent 1250-0780
Agilent 436A and
Agilent 8482A
4-15
Service
Verifying Oscilloscope Performance
Internal Trig
Sensitivity
1 Press Setup , then press the Default Setup softkey.
2 Connect the signal generator to channel 1.
3 Verify the trigger sensitivity at 100 MHz and 0.5 divisions.
a Set the signal generator to 100 MHz and about 50 mV.
b Press Autoscale .
c Press 1 , then toggle Input softkey to 50W.
d Decrease the output of the signal generator until there is 0.5 vertical
divisions of the signal displayed.
The trigger should be stable. If the triggering is not stable, try
adjusting the trigger level. If adjusting the trigger level makes the
triggering stable, the test still passes. If adjusting the trigger does not
help, see "Troubleshooting the Oscilloscope," on page 4-32.
e Record the result on the Performance Test Record as Pass or Fail.
4 Verify the trigger sensitivity at 500 MHz and 1 division.
a Change the output of the signal generator to 500 MHz and set
amplitude to about 100 mV.
b Press Autoscale .
c Decrease the output of the signal generator until there is 1 vertical
division of the signal displayed.
The trigger should be stable. If the triggering is not stable, try
adjusting the trigger level. If adjusting the trigger level makes the
triggering stable, the test still passes. If adjusting the trigger does not
help, see "Troubleshooting the Oscilloscope," on page 4-32.
d Record the result on the Performance Test Record as Pass or Fail.
5 Repeat steps 1 through 4 substituting channel 2 for channel 1 in the
procedure.
4-16
Service
Verifying Oscilloscope Performance
External Trig
Sensitivity
6 Verify the external trigger sensitivity at 500 MHz, 150 mV p-p and at
100 MHz, 75 mV p-p.
a Press
c Press
b
c Press
Source , then press the Ext softkey.
External Trigger , then toggle Input softkey to 50 .
1
then toggle Input softkey to 50 .
W
W
d Using the power splitter, connect one power splitter to output to the
e
f
g
h
i
j
k
l
m
n
channel 1 input and the other power splitter output to the power
sensor.
Set the power meter Cal Factor to the 500 MHz value from the chart
on the power sensor.
Set signal generator frequency to 500 MHz and adjust the output
amplitude to achieve a power meter reading of 0.075 mW. (This
corresponds to 150 mV p-p.)
Set Time/div to 1 ns/div.
Disconnect power meter from the power splitter and connect the
power splitter output to External Trigger Input.
Check for stable triggering, adjusting trigger level if necessary.
Record results in the Performance Test Record as Pass or Fail.
If the test fails, refer to "Troubleshooting the Oscilloscope" on page
4-32.
Change the signal generator frequency to 100 MHz at output amplitude of
75 mV p-p, as measured with the 54615B/16B/16C (channel 1). Press
Voltage , then the softkey Vp-p.
Set Time/div to 10 ns/div.
Check for stable triggering, adjusting trigger level if necessary.
Record results in the Performance Test Record as Pass or Fail.
If test fails, refer to "Troubleshooting the Oscilloscope" on page 4-32.
4-17
Service
Verifying Oscilloscope Performance
To verify Vertical Output on Option 005
This section applies only to Option 005 Enhanced TV/Video Trigger
In this test we will use the oscilloscope’s channel 2 to measure the amplitude
of the Vertical Output (VERT OUT connector on rear panel) signal.
Test limits:
Table 4-8
~90 mVp-p into 50Ω with a full screen input.
Equipment Required
Equipment
Signal generator
Cable
Cable
Adapter
Critical specifications
1 to 500 MHz at 200 mV
BNC, 48 inch
Type N (m), 24 inch
Type N (m) to BNC (f)
Recommended Model/Part
Agilent 8656B opt 001
Agilent 10503A
Agilent 11500B
Agilent 1251-0780
1 Connect the signal generator to oscilloscope channel 1 input.
2 Set the signal generator to equal the full bandwidth of your
oscilloscope, and set the output level to 0 dBm.
3 Connect the signal generator to oscilloscope channel 1. Set channel
1 Input to 50Ω to correctly terminate the signal generator.
4 Press Autoscale .
5 Adjust the oscilloscope controls and signal generator to obtain an
8-division high display.
6 Connect oscilloscope rear-panel VERT OUT to oscilloscope channel 2.
Set channel 2 Input to 50Ω mode.
7 Measure the peak-to-peak amplitude of channel 2. It should be
greater than or equal to 63.6 mVp-p.
Because the measurement is being made at the full bandwidth of the
oscilloscope’s channel, the peak-to-peak measurement is corrected for the
oscilloscope’s high frequency roll off.
4-18
54615B/54616B/54616C
Performance Test Record
Serial No. ______________________________________
Test Interval ____________________________________
Recommended Next Testing _______________________
Calibrator Output
Nominal
Test Limits
dc
delay
0 µV
5V
900 mVp-p
–450 mVavg
2.46 KHz
2.08 KHz
54615B/16B
54616C
Voltage measurement accuracy
Range
Power Supply Setting
5 V/Div
2 V/Div
1 V/Div
500 mV/Div
200 mV/Div
100 mV/Div
50 mV/Div
20 mV/Div
10 mV/Div
5 mV/Div
2 mV/Div
Bandwidth
35 V
14 V
7V
3.5 V
1.4 V
700 mV
350 mV
140 mV
70 mV
35 mV
14 mV
Horizontal ∆t and 1/∆t accuracy
Generator Setting
Frequency
Period
Frequency
Period
Frequency
Period
Frequency
Period
Trigger sensitivity
10 kHz
100 µs
1 MHz
1 µs
50 MHz
20 ns
500 MHz
2 ns
–500 µV to +500 µV
4.990 V to 5.010 V
750 mV to 1050 mV
–525 mV to –375 mV
2.36 kHz to 2.56 kHz
1.98 kHz to 2.18 kHz
Test Limits
34.04 V to 35.96 V
13.616 V to 14.384 V
6.808 V to 7.192 V
3.404 V to 3.596 V
1.3616 V to 1.4384 V
680.8 mV to 719.2 mV
340.4 mV to 359.6 mV
136.16 mV to 143.84 mV
68.08 mV to 71.92 mV
33.66 mV to 36.34 mV
12.66 mV to 15.34 mV
Test by____________________________
Work Order No._____________________
Temperature _______________________
Result
_____________
_____________
_____________
_____________
_____________
_____________
Channel 1
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Test Limits
≤ ±3 dB
Channel 1
Test Limits
Results
9.96 kHz to 10.04 kHz
99.59 µs to 100.41 µs
995.8 kHz to 1.0043 MHz
995.9 ns to 1.004 µs
49.26 MHz to 50.76 MHz
19.70 ns to 20.30 ns
471.67 MHz to 531.94 MHz
1.880 ns to 2.120 ns
Test Limits
Internal trigger
100 MHz at 0.5 divisions
500 MHz at 1 division
External trigger
500 MHz at 150 mV p-p
100 MHz at 75 mV p-p
Option 005 voltage measurement accuracy
Amplitude peak-to-peak
Test Limits
_____________
Channel 2
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Channel 2
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
_____________
Channel 1
_____________
_____________
Channel 2
_____________
_____________
External
≥63.6 mVp-p
_____________
_____________
Channel 1
_____________
Channel 2
_____________
4-19
4-20
Adjusting the Oscilloscope
This section explains how to adjust the oscilloscope so that it is at
optimum operating performance. You should perform the hardware
adjustments and Self Cal periodically as indicated below.
• Hardware adjustments at 12 months or 2,000 hours of operation
• Peform Self Cal at 6 months or 1000 hours of operation, or
if ambient temperature is greater than 10 °C from the calibration
temperature, or if the user desires to maximize the measurement
accuracy
The amount of use, environmental conditions, and your past
experience with other instruments can help you to determine if you
need a shorter adjustment interval.
Make sure you allow the oscilloscope to warm up for at least 30
minutes before you start the adjustments.
WARNING
CAUTION
CAUTION
The maintenance described in this section is performed with power supplied
to the oscilloscope and with the protective covers removed. Only trained
service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power
cord removed from the oscilloscope. Read the safety summary at the back
of this book before proceeding.
Do not disconnect any cables or remove any assemblies with the power
applied to the oscilloscope, or damage to the oscilloscope can occur.
Do not operate the oscilloscope for more than 45 minutes with its cover
removed. Air flow over the samplers is reduced which leads to higher than
normal operating temperatures.
4–21
Service
Adjusting the Oscilloscope
To adjust the power supply
The power supply has a +5.1 V adjustment and a –5.25 V adjustment. The
other voltages are based on the +5.1 V adjustment. In this procedure you use
a multimeter to measure the +5.1 V and –5.25 V, and if necessary, adjust the
supplies to within tolerance.
Table 4-9
Equipment Required
Equipment
Digital multimeter
Critical specifications
0.1 mV resolution, accuracy ±0.05%
Recommended Model/Part
Agilent 34401A
1 Set up the oscilloscope for the voltage adjustment.
a Turn off the oscilloscope and disconnect power cable.
b Remove the cover from the oscilloscope as described in "To replace
an assembly" on page 4-46 of this chapter.
c Place the oscilloscope on its side.
d Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope chassis.
e Reconnect power cable.
f Turn on the oscilloscope.
4–22
Service
Adjusting the Oscilloscope
2 Measure the power supply voltages at E10 through E15 on the system
board.
The test points are not marked on the system board; see figure below for
location of test points.
Make sure that the voltage measurements are within the following tolerances.
Power Supply Voltage Tolerances
Supply Voltage
+5.1 V
–5.25 V
+15.75 V
− 15.75 V
Tolerance
±153 mV (+4.947 V to +5.253 V)
±158 mV (–5.092 V to –5.408 V)
+1.260 V, –787 mV (+14.963 V to +17.010 V)
±787 mV (−14.963 V to −16.537V)
Figure 4-1
Low Voltage Power Supply voltage test points
(bottom side of oscilloscope)
4–23
Service
Adjusting the Oscilloscope
If the +5.1 V measurement is out of tolerance, adjust the +5.1 V adjustment
on the power supply; if the –5.25 V measurement is out of tolerance, adjust
the –5.25 V adjustment on the power supply (see figure below). The ±15.75
V supplies are not adjustable and are dependent upon the +5.1 V supply. If
adjusting the power supply does not bring all the voltages within tolerance,
see "Troubleshooting the Oscilloscope," on page 4-32 in this chapter.
Figure 4-2
+5.1 V adjust
fan connector
Low Voltage Power Supply adjustment locations
(top side of oscilloscope)
4–24
–5.25 V adjust
Service
Adjusting the Oscilloscope
To perform the self-calibration
In this procedure you load the default calibration factors to give a known
starting point for the firmware calibration. However, once the default
calibration factors are loaded, you must perform the remainder of the
firmware calibration to maintain the accuracy of the oscilloscope.
Table 4-10
Equipment Required
Equipment
Critical specifications
Cable
Cable
Adapter
Adapter
BNC, 3 feet
BNC, 9 inches, Qty 2
BNC tee (m) (f) (f)
BNC (f-f)
Recommended
Model/Part
Agilent 10503A
Agilent 10502A
Agilent 1250-0781
Agilent 1250-0080
1 Check the rear panel CALIBRATOR output level.
If you are not sure how to check the CALIBRATOR, see "To check the output
of the CALIBRATOR," on page 4-6.
2 Load the default calibration factors.
a Set the rear-panel CALIBRATION switch to UNPROTECTED
(up position).
b Press Print/Utility , then press the Service Menu softkey, then
press the Self Cal Menu softkey.
c Press the Load Defaults softkey.
Self-calibration hint
The instrument is self-calibrated at the factory. However, it should be
self-calibrated again in its working environment after a 30-minute warmup to
obtain the best accuracy.
4–25
Service
Adjusting the Oscilloscope
Vertical self cal
3 After the message "Default calibration factors loaded" is
momentarily displayed on the lower left side of the display, press
the Vertical softkey.
4 Press the Continue softkey and follow the instructions on the display.
The display prompts you to connect the rear-panel CALIBRATOR output
simultaneously to channel 1 and channel 2, then to channel 1 and external
trigger. Make these connections using the 3 BNC cables and 2 adapters listed
in the equipment required table for this test.
5 When the message "Press Continue to return to calibration
menu" appears on the display, press the Continue softkey.
Delay self cal
6 Press the Delay softkey, then follow the instructions on the display.
The display prompts you to connect the rear-panel CALIBRATOR output
simultaneously to channels 1 and channel 2, then to channel 1 and external
trigger, and finally to channel 2 and and external trigger. Make sure you use
the 10502A cables to ensure equal cable lengths.
7 Press the Continue softkey to start the delay self calibration.
8 When the message "Press Continue to return to calibration
menu" appears on the display, press the Continue softkey to exit the
self calibration.
9 Set the rear-panel CALIBRATION switch to PROTECTED.
4–26
Service
Adjusting the Oscilloscope
To adjust the high-frequency pulse response
In this procedure you adjust the high-frequency pulse response for each
channel to a nominal setting for optimum performance over all sensitivity
settings.
Table 4-11
Equipment Required
Equipment
Pulse generator
Cable
Critical specifications
Rise time ≤ 700 ps
50Ω BNC (m-m)
Recommended Model/Part
Agilent 8131A
Agilent 10503A
1 Press
Setup , press the Default Setup softkey, then set the
oscilloscope and pulse generator as indicated below.
Pulse Generator
Delay
Duty Cycle
Width
High
Low
0 ps
50%
50 ns
0.3 V
0.0 V
Oscilloscope Channel 1 and Channel 2
Input
50Ω
Volts/Div
50 mV
Display Vectors
Off
Display Grid
None
2 Connect the pulse generator output to the Channel 1 input of the
oscilloscope , then enable the pulse generator output.
3 Press Autoscale .
4 Press
Cursors , then press the appropriate V1 or V2 Active Cursor
softkey.
5 Adjust the V1 cursor to the bottom-base of the waveform and adjust
the V2 cursor to the top-base of the waveform.
6 Record the ∆V(1) value as Vbase = ____________
7 Adjust the V1 cursor to the peak of the first excursion above the V2
cursor.
This is the overshoot of the input pulse which is used to optimize the
frequency response of the channel.
8 Record the ∆V(1) value as Vovershoot = ____________
9 Calculate % overshoot = (Vovershoot / Vbase) X 100 _____________
4–27
Service
Adjusting the Oscilloscope
10 Adjust the channel 1 high-frequency pulse response for an %
overshhot of 5% mininum to 7% maximum.
If a low loss 50Ω cable is used (such as 8120-4949), the % overshoot should be
6% minimum to 8% maximum.)
11 Repeat steps 2 through 10 substituting Channel 2 for Channel 1 and
∆V(2) for ∆V(1).
Figure 4-3
High-frequency pulse
response adjustments
High-frequency pulse response adjustment locations
4–28
Service
Adjusting the Oscilloscope
To adjust the display (54615B/16B only)
There are no adjustments on the 54616C color display – if the display fails,
replace the display assembly.
The display adjustments are optional and normally do not require
adjustment. You should use this procedure only for the few cases when the
display is obviously out of adjustment.
Table 4-12
Equipment Required
Equipment
Critical specifications
Digital multimeter
Accuracy ±0.05%, 1 mV resolution
Recommended
Model/Part
Agilent 34401A
1 Connect the digital multimeter to the end of R901 closest to the fuse.
2
3
4
5
6
7
See figure next page.
Adjust +B for +14.00 V.
Press Print/Utility . Press the Service Menu softkey, then the
Self Tst Menu softkey, and then the Display softkey.
Adjust V.HO (vertical hold) for vertical synchronization.
Set the intensity control (on the front panel) to mid-range.
Adjust Sub Bri (sub bright) to the lowest setting so that the half
bright blocks on the display are visible.
Increase the intensity control to a comfortable viewing level.
This is usually about 3/4 of its maximum range.
4–29
Service
Adjusting the Oscilloscope
8 Adjust HB Cont (half bright contrast) for the best contrast between
the half bright and full bright blocks.
You can readjust Sub Bri, intensity control, and HB Cont to suit your
individual preference.
9 Press any key to continue to the next test pattern. Then, adjust
H.Hold (horizontal hold) to center the display horizontally.
10 Adjust Focus for the best focus.
11 Press any key to continue to the normal display pattern. Then adjust
V.Lin (vertical linearity) for equal sizing of all four corner squares.
12 Adjust V.Size (vertical size) to center the display vertically at the
maximum allowable size without losing the text.
Adjustments V.Lin and V.Size interact so you may need to readjust sizing and
vertical centering of the display.
Figure 4-4
Display board adjustment locations
4–30
Service
Adjusting the Oscilloscope
To adjust the Option 005 offset (R15)
The oscilloscope must be calibrated before performing this adjustment. Refer to
"To perform the self-calibration" on page 4–25.
Table 4-13
Equipment Required
Equipment Required
Critical Specification
Digital Multimeter
Adapter
0.1 mV resolution, accuracy ±0.05%
BNC (m) to dual banana post
Recommended
Model/Part
Agilent 34401A
Agilent 10110B
1 Set up the oscilloscope for the voltage adjustment.
a Turn off the oscilloscope.
b Remove the cabinet from the oscilloscope.
c Connect the negative lead of the digital multimeter to a ground point
on the oscilloscope.
d Connect the oscilloscope rear-panel VERT OUT connector to the
voltage inputs of the digital multimeter (DMM) using the DMM’s test
leads and the BNC to dual banana post adapter.
e Turn on the oscilloscope
f Setup the digital multimeter for a DC voltage measurement.
g Press the Setup front panel key on the oscilloscope.
h Press the Default Setup softkey on the oscilloscope.
2 Adjust R15 (below VERT OUT connector) on the Option 005 PC board
so that the measured voltage on the digital multimeter is 0 volts ± 1
mV.
If adjusting R15 does not bring the voltage within tolerance, see "To
troubleshoot Option 005" at the end of the troubleshooting section.
4–31
Troubleshooting the Oscilloscope
The service policy for this instrument is replacement of defective
assemblies. The following procedures can help isolate problems to the
defective assembly.
WARNING
CAUTION
CAUTION
The maintenance described in this section is performed with power supplied
to the oscilloscope and with the protective covers removed. Only trained
service personnel who are aware of the hazards involved should perform the
maintenance. Whenever possible, perform the procedures with the power
cord removed from the oscilloscope. Read the safety summary at the back
of this book before proceeding.
Do not disconnect any cables or remove any assemblies with the power
applied to the oscilloscope, or damage to the oscilloscope can occur.
ELECTROSTATIC DISCHARGE (ESD) can damage electronic components.
When using any of the procedures in this chapter you should use proper ESD
precautions. As a minimum, you should place the instrument on a properly
grounded ESD mat and wear a properly grounded ESD strap.
The following equipment is needed for troubleshooting the
oscilloscope.
Table 4-14
Equipment Required
Equipment
Critical specifications
Digital multimeter
Oscilloscope
Dummy load1
Accuracy ±0.05%, 1 mV resolution
100 MHz, 1 MΩ input R
Compatible with power supply
1
See page 4-33 to construct your own dummy load.
4–32
Recommended
model/part
Agilent 34401A
Agilent 54600
see note 1 below
Service
Troubleshooting the Oscilloscope
To construct your own dummy load
1 Obtain a connector compatible with the connector J3 on the Low
Voltage Power Supply (see figure below).
2 Connect the following load resistors to the connector.
+5.1 V requires a 4 A load, 1.3 Ω and 20.4 W on pins 9–12.
–5.25 V requires a 3 A load, 1.75 Ω and 15.8 W on pins 15–18.
+15.75 V requires a 1.3 A load, 12.2 Ω and 20.5 W on pins 5–6.
–15.75 V requires a 0.8 A load, 19.7 Ω and 13 W on pin 3.
3 Connect the other end of the resistors to ground pins 2, 4, 7, 8, 13, 14,
19, and 20.
Figure 4-5
Low Voltage Power Supply connector J3 pinout
4–33
Service
Troubleshooting the Oscilloscope
To check out the oscilloscope
1 Is there an interface module connected to the oscilloscope?
If yes, do the following steps. If not, go to step 2.
a Turn off the oscilloscope.
b Remove the module.
c Turn on the oscilloscope, then check for the failing symptom.
If the failing symptom disappears, replace the module. If not, go to
step 2.
2 Turn off the oscilloscope for 30 seconds minimum and then turn on
the oscilloscope again.
If an error message (example: Vertical cal factors failed
checksum test-defaults loaded) appears within the waveform
display area, go to "To clear error messages", on page 4–37. If error messages
do not appear, go to step 3.
3 Disconnect any external cables from the front panel.
4 Disconnect the power cord, then remove the cover.
5 Connect the power cord, then turn on the oscilloscope.
If the display comes on after a few seconds, (logo and copyright text,
followed by a graticule with text at top of the display) go to "To check the
Low Voltage Power Supply," on page 4-40. If, after checking the Low Voltage
Power Supply, the voltages are within the test limits, go to step 9. If not, go
to step 7. If the display did not come on, do the steps below.
a Check the intensity knob (54615B/16B only) to see if it is set too low
for viewing.
b If there is still no display, disconnect the power cord.
c Check all cable connections.
d Go to "To check the Low Voltage Power Supply," on page 4-40.
If the voltages are within the limits go to step 6. If not, go to step 7.
4–34
Service
Troubleshooting the Oscilloscope
6 Disconnect the ribbon cable from the display board, then check the
following signals on the system board.
Table 4-15
Signals from U609 (54615B and 54616B)
Signal
U817 Pin 7
U817 Pin 24
J803 Pin 13
Name
DE
Hsync
Vsync
Frequency
19.72 kHz
19.72 kHz
60.00 Hz
Pulse width
38.0 µs
3.0 µs
253.5 µs
Voltage
5.0 Vp-p
5.0 Vp-p
5.0 Vp-p
Pulse width
48.0 µs
2.90 µs
360.0 µs
Voltage
5.0 Vp-p
5.0 Vp-p
5.0 Vp-p
Signals from U609 (54616C)
Signal
U827 Pin 7
U625 Pin 35
U625 Pin 20
Name
DE
Hsync
Vsync
Frequency
16.67 kHz
16.67 kHz
50.05 Hz
If the signals are good, replace the display assembly. If not, replace the
system board.
7 Disconnect the ribbon cable from the display board.
8 Go to "To check the Low Voltage Power Supply," on page 4-40.
If the voltages are within the test limits, replace the display assembly. If not,
do the steps below.
a Disconnect the power cord.
b Disconnect the ribbon cable from the power supply.
c Connect the dummy load to the power supply connector.
d Connect the power cord, then measure the power supply voltages
again (see new tolerances below).
If the voltages are now within the test limits, replace the system
board. If not, replace the power supply.
4–35
Service
Troubleshooting the Oscilloscope
Low Voltage Power Supply Voltage Tolerances
Supply Voltage
+5.1 V
–5.25 V
+15.75 V
− 15.75 V
Tolerance
±153 mV (+4.947 V to +5.253 V)
±158 mV (–5.092 V to –5.408 V)
+1.260 V, –787 mV (+14.963 V to +17.010 V)
±787 mV (−14.963 V to −16.537V)
9 Is the fan running?
If yes, go to "To run the internal self-tests," on page 4-41. If not, do the steps
below.
The Low Voltage Power Supply has a thermal cut-out circuit. If the fan is
defective, the Low Voltage Power Supply shuts down when it gets too hot for
safe operation.
a Disconnect the fan cable from the power supply.
b Measure the fan voltage at the connector on the power supply.
See figure below for location of fan connector. If the fan voltage is
approximately +8 Vdc, replace the fan. If not, replace the power
supply.
Figure 4-6
fan connector
Low Voltage Power Supply fan connector location
4–36
Service
Troubleshooting the Oscilloscope
To clear error messages
If any Fail message appears on the display after cycling power:
a Press any menu key and cycle the power on the oscilloscope again.
b Hold the menu key down until the message "Key-down power-up executed"
or "Keydown power sequence initiated ..." is displayed.
c If the original fail message still appears, contact your Agilent Service Center
for diagnosis and repair.
Setup memories and trace memories are cleared after a keydown powerup is
performed.
One or more of the following error messages may appear on the display
(within the graticule space) as a result of internal NVRAM (non-volatile
random access memory.)
1 If the message "Vertical Cal factors failed checksum
test–defaults loaded" appears on screen, go to "To perform the
self-calibration" on page 4–25 , perform steps 1 through 5, then
continue to steps below.
This message means that the vertical calibration factors which were stored in
NVRAM along with a checksum have been corrupted. This information is
written into NVRAM when a vertical self-calibration is run. During powerup,
the checksum is recomputed and compared to the one saved when the
vertical calibration factors were saved. If the checksums do not match, the
error message is displayed.
a Cycle the power on the oscilloscope.
b If default vertical calibration factors are loaded and error messages
remain, contact you Agilent service center for diagnosis and repair.
4–37
Service
Troubleshooting the Oscilloscope
2 If the message "Delay cal factors failed checksum–defaults
loaded," appears on screen, go to "To perform the self-calibration, "
on page 4–25, perform steps 6 through 9, then continue to steps
below.
This message means that the horizontal delay calibration factors which were
stored in NVRAM along with a checksum have been corrupted. This
information is written into NVRAM when the horizontal delay calibration is
run. During powerup, the checksum was recomputed and compared against
the one saved when the horizontal delay calibration factors were saved. If
the checksums do not match, the error message is displayed.
a Cycle the power of the oscilloscope.
b If default horizontal delay calibration factors are loaded and error
messages remain, contact your Agilent service center for diagnosis
and repair.
3 If one of the following messages appears on screen:
"Results from last vertical calibration: Failed" or
"Results from last vertical calibration: Defaulted" or
"Results form last vertical calibration: Aborted",
go to "To perform the self-calibration," page 4–25 steps 1 through 5,
then continue to steps below.
The first message means that the most recent calibration of the vertical
subsystem failed.
The second message means that the default vertical factors have been loaded.
The third message means that the default vertical factors have been aborted
a Cycle the power of the oscilloscope.
b If default vertical calibration factors are loaded and error messages
remain, contact your Agilent service center for diagnosis and repair.
4–38
Service
Troubleshooting the Oscilloscope
4 If one of the following messages appear on screen:
"Results from last delay calibration: Failed" or
"Results from last delay calibration: Defaulted" or
"Results from last delay calibration: Aborted",
go to "To perform the self-calibration," page 4-25 steps 6 through 9,
then continue to steps below.
The first message means that the most recent calibration of the horizontal
delay subsystem failed.
The second message means that the default horizontal delay calibration
factors have been loaded.
The third message means that the default horizontal delay calibration factors
have been aborted.
a Cycle the power of the oscilloscope.
b If default delay calibration factors are loaded and error messages
remain, contact your Agilent service center for diagnosis and repair.
5 If either of these messages appear on screen:
"Channel 1 Acquisition Memory Failed" or
"Channel 2 Acquisition Memory Failed"
The first message means an error has developed in the Acquisition memory
for channel 1, contact your Agilent service center for diagnosis and repair.
The second message means an error has developed in the Acquisition
memory for channel 2, contact your Agilent service center for diagnosis and
repair.
6 Continue with step 3 "To check out the oscilloscope" on page 4–34.
4–39
Service
Troubleshooting the Oscilloscope
To check the Low Voltage Power Supply
1 Disconnect the power cord, then set the oscilloscope on its side.
2 Connect the negative lead of the multimeter to a ground point on the
oscilloscope. Connect the power cord and turn on the oscilloscope.
3 Measure the power supply voltages at E10 through E15 on the system
board.
Power Supply Voltage Tolerances
Supply Voltage
+5.1 V
–5.25 V
+15.75 V
− 15.75 V
Tolerance
±153 mV (+4.947 V to +5.253 V)
±158 mV (–5.092 V to –5.408 V)
+1.260 V, –787 mV (+14.963 V to +17.010 V)
±787 mV (−14.963 V to −16.537V)
Figure 4-7
Low Voltage Power Supply voltage test points
If the +5.1 V measurement is out of tolerance, adjust the +5.1 V adjustment
on the power supply; if the –5.25 V measurement is out of tolerance, adjust
the –5.25 V adjustment on the power supply (see figure 4-2). The ±15.75 V
supplies are not adjustable and are dependent upon the +5.1 V supply.
Blown fuse
If the fuse is blown in the power supply, the power supply is defective. Replace
the power supply.
4–40
Service
Troubleshooting the Oscilloscope
To run the internal self-tests
1 Perform the display test (54615B/16B only.)
a Press Print/Utility .
b Press the Service Menu softkey, then the Self Tst Menu softkey, and
then the Display softkey.
c Do the half bright and full bright squares appear?
If yes, continue with the steps below. If not, replace the display.
d Press any key to continue. Do squares appear in the four corners?
If yes, the display is good. If not, replace the display.
f Press any key to end the test.
If you still have the failing symptom, replace the system board.
2 Perform the display test (54616C only.)
a Press Print/Utility .
b Press the Service Menu softkey, then the Self Tst Menu softkey, and
then the Display softkey.
c Do 5 rows of characters appear (white, inverse white, red, green, and
blue) and 4 rectangles of white,red,green, and blue appear?
If yes, continue with the steps below. If not, replace the display.
d Press any key to continue. Does a black screen appear?
If yes, the display is good. If not, replace the display.
e Press any key to continue. Does a white screen appear?
If yes, the display is good. If not, replace the display.
f Press any key to continue. Does a red screen appear?
If yes, the display is good. If not, replace the display.
g Press any key to continue. Does a green screen appear?
If yes, the display is good. If not, replace the display.
h Press any key to continue. Does a blue screen appear?
If yes, the display is good. If not, replace the display.
i Press any key to end the test.
If you still have the failing symptom, replace the system board.
4–41
Service
Troubleshooting the Oscilloscope
3 Perform the keyboard test.
a Press the Keyboard softkey.
A pictorial diagram of the front panel will appear on the display.
b Press each key, and notice that when you press a key a corresponding
block on the display fills in.
c Rotate the knobs (except the intensity) and notice that an arrow
appears on the display that points in the direction you rotate the knob.
d Do all the keys and knobs work?
If yes, Press Stop two or three times (the display indicates how
many times), then go to step 3. If not, replace the keyboard and
keyboard assembly.
4 Check the output level of the DAC.
a Press the DAC softkey.
b Connect a multimeter to the rear panel CALIBRATOR connector.
The multimeter should read 0 V ±500 µV.
c Press any key to continue.
The multimeter should read 5 V ±10 mV.
d Are the DAC voltages correct?
If yes, press any key to continue. If not, replace the system board.
e Connect a test oscilloscope to the rear-panel CALIBRATOR connector.
f The test oscilloscope should measure :
Vp-p = 900 mV ± 150 mV
Vavg = –450 mV ± 75 mV
Freq = 2.46 kHz ± 100 Hz (54615B/16B)
2.08 kHz ± 100 Hz (54616C)
g Are these readings correct?
If yes, press any key to continue. If not, replace the system board.
4–42
Service
Troubleshooting the Oscilloscope
5 Perform the ROM test
a Press the ROM softkey.
b Does the display message say "Test Passed"?
If yes, go to next test. If not, (the display message says Test Failed)
replace the system board.
6 Perform the RAM test.
a Press the RAM softkey.
b Does the display message say "Test Passed"?
If yes, self-tests are complete. If not, (the display message says
"Test Failed") replace the system board.
4–43
Service
Troubleshooting the Oscilloscope
To troubleshoot Option 005
To isolate a malfunction to the Option 005 board, do the following:
1 Disconnect the three cables that connect the Option 005 board to the
system board.
2 Verify proper oscilloscope operation, as described in this chapter.
3 If the oscilloscope passes the performance verification and the
malfunction still occurs when the Option 005 board is reconnected,
then you should replace the Option 005 board.
4–44
Replacing Parts in the Oscilloscope
This section contains instructions for removing and ordering
replaceable assemblies. Also in this section is a parts list for the
assemblies and hardware of the oscilloscope that you can order from
Agilent.
Before working on the oscilloscope, read the safety summary at the
back of this book.
WARNING
CAUTION
CAUTION
Hazardous voltages are on the CRT, power supply, and display sweep board.
To avoid electrical shock, disconnect the power cord from the oscilloscope.
Wait at least three minutes for the capacitors in the oscilloscope to
discharge before you begin disassembling the oscilloscope.
Do not replace assemblies or cables with the oscilloscope turned on or
damage to the components can occur.
ELECTROSTATIC DISCHARGE (ESD) can damage electronic components.
When using any of the procedures in this chapter you should use proper ESD
precautions. As a minimum, you should place the instrument on a properly
grounded ESD mat and wear a properly grounded ESD strap.
4-45
Service
Replacing Parts in the Oscilloscope
To replace an assembly
Refer to the exploded view of the oscilloscope, figure 4-12 (figure 4-14 for
Option 005 board), for details on how the oscilloscope fits together. To
install an assembly, follow the instructions in reverse order.
You will need the following tools to disassemble the oscilloscope:
• T15 TORX driver to remove the oscilloscope from the cabinet and to
remove the fan.
•
•
•
•
T10 TORX driver to remove the assemblies from the deck.
Flat-blade screwdriver to remove the optional modules and the pouch.
9/16-inch nut driver or wrench to remove BNC nut at rear of cabinet.
Torque driver, 0.44 Nm (3.8 in-lbs), 16mm or 5/8-inch hex drive for probe
sense nuts.
• Torque driver, 0.23 Nm (2 in-lbs), Torx T6 drive for heatsink and
connector of A6 and A7 hybrid assemblies.
• Torque driver, 0.34 Nm (3 in-lbs), 5mm or 3/16-inch hex drive for
standoffs of A6 and A7 hybrid assemblies.
1 Remove the oscilloscope from the cabinet.
a Turn off the oscilloscope and disconnect the power cable.
b If a module is installed, remove it from the oscilloscope.
c Using the T15 TORX driver, remove the two screws from the rear of
the cabinet.
d Using your thumbs, gently push on the two rear-panel connectors to
slide the oscilloscope out of the cabinet.
2 Remove the faulty assembly.
You can remove any of the following six assemblies: fan, front panel, display,
system board, power supply, and keyboard.
4-46
Service
Replacing Parts in the Oscilloscope
To remove the fan
1 Disconnect the fan cable from the power supply board.
2 Using the T15 TORX driver, remove the three screws that hold the
fan to the deck.
Fan Orientation
When installing the new fan, face the fan to blow air into the oscilloscope
To remove the front panel
1 Remove the intensity knob by pulling straight out.
2 Disconnect the keyboard ribbon cable from the system board.
3 Remove the probe sense nuts.
4 Use a screwdriver to release retainer tab A, and your finger to release
retainer tab B. See figure next page.
Releasing front panel from deck of instrument
When tab B is released, be careful that the sheet metal tab of front-panel
ground input clears the softkey circuit board. The circuit board may be
depressed slightly with a screwdriver to avoid damage to the circuit board.
5 Rotate the front panel out until the bottom clears the rear of the
assembly, then lift the front panel to free the hooks on top.
4-47
Service
Replacing Parts in the Oscilloscope
When installing the front panel, make sure that the power switch shaft is aligned
with its mating hole in the front panel.
The front panel swings in to engage the two retainer tabs. Before attempting to
engage the retainer tabs, make sure that the six hooks on top of the front panel
are fully engaged with their mating holes in the sheet metal.
Figure 4-8
Tab B
Tab A
4-48
Service
Replacing Parts in the Oscilloscope
To remove the display
1 Remove the front panel.
2 Disconnect the ribbon cable and the probe compensation cable from
the display.
3 Using the T10 TORX driver, remove the two screws that hold the
display to the deck.
Make sure that when you reinstall these screws that you use the
correct parts. If longer screws are used, they can short the system
board to ground.
4 As you lift the display, rotate it off the two tabs on the side of the
deck.
To remove the system board
1 Using the T10 TORX driver, remove the six screws that hold the
system board to the deck.
When you reinstall these screws, the long screw and spacer are used between
the two large heatsinks.
2 Remove the three probe sense nuts from the front panel BNC’s.
3 Remove the two screws from the rear-panel interface connector and
the nut from the rear-panel BNC.
4 Disconnect the three ribbon cables and the probe compensation
cable.
5 As you remove the system board, rotate the system board so that the
BNCs clear the front panel.
4-49
Service
Replacing Parts in the Oscilloscope
To remove the attenuator
Use the following procedure to remove the attenuator assembly. When
necessary, refer to other removal procedures.
CAUTION
ELECTROSTATIC DISCHARGE!
Use grounded wrist straps and mats when servicing the system board.
Electrostatic discharge can damage electronic components.
The attenuator is not part of the system board. If the system board is
replaced, the attenuator will have to be moved to the replacement board.
1 Remove the system board.
2 Remove eight screws from the bottom of the system board that
secure the attenuator.
3 Three 24-pin connectors (located at the rear of and inside the
attenuator) connect the attenuator to the system board. With a
gentle rocking or prying motion, lift the attenuator from the system
board.
If you permanently replace parts
If you have permanently changed any combination of system board, attenuator,
or acquisition hybrid, you will need to adjust the high-frequency pulse response
on the affected channels. For example:
• If you permanently swap the acquisition hybrids during troubleshooting, you
must adjust both channels.
• If you replace one hybrid, you must adjust that channel.
• If you replace the system board, you must adjust both channels.
• If you replace the attenuator, you must adjust both channels.
4-50
Service
Replacing Parts in the Oscilloscope
To remove and replace an acquisition hybrid
CAUTION
ELECTROSTATIC DISCHARGE!
Use grounded wrist straps and mats when servicing the system board.
Electrostatic discharge can damage electronic components.
The system board does not need to be removed before replacing an
acquisition hybrid.
To Remove
1 Use a T-6 Torx driver to remove
Figure 4-9
two screws that secure the
heatsink spring, then remove the
MP21
heatsink.
Heatsink
2 Use a 3/16 hex driver to remove
Spring
two standoffs that secure the top
plate.
3 Use a T-6 Torx driver to remove
two screws that secure the top
plate.
H10
4 Lift the hybrid off of the connector Screws (2)
assembly.
To Replace
The location of pins and other locator
features will guide the alignment of
H9
parts. This assembly cannot be
Screws (2)
assembled incorrectly without forcing.
H8
Screws (2)
MP20
Heatsink
MP19
Standoff (2)
MP25
Top Plate
A6 or A7
Acquisition
Hybrid
E1
Connector
1 Install the hybrid with the three
corner holes over the three large
locator pins.
2 Install the top plate with the three
cut-out corners over the three
locator pins.
CAUTION
Tighten the hybrid carefully. Excess
force or improper procedure may
break the hybrid, which is very
expensive to replace.
System
Board
MP24
Bottom
Plate
4-51
Service
Replacing Parts in the Oscilloscope
3 Loosely install the two hex standoffs and two screws through the top
plate.
4 Use 5 mm (3/16 in) and T6 torque drivers set to 0.34 Nm (3 in-lbs) to
tighten the standoffs and screws in the following sequence.
a Tighten any standoff or screw to specifications.
b Tighten the standoff or screw directly opposite the first one to
specifications.
c Tighten the remaining two standoffs or screws to specifications.
5 Check for the graphite pad on the underside of the heatsink, then
install it with the hole that is near one corner toward the front of the
instrument.
When the heatsink is installed properly, you will be able to see the
adjustment potentiometer through the hole in the heatsink.
6 Install the heatsink spring with the curve down.
7 Install the two heatsink screws . Use a T6 torque driver set to 0.23
Nm (2 in-lbs) to tighten them.
If you permanently replace parts
If you have permanently changed any combination of system board, attenuator,
or acquisition hybrid, you will need to adjust the high-frequency pulse response
on the affected channels. For example:
• If you permanently swap the acquisition hybrids during troubleshooting, you
must adjust both channels.
• If you replace one hybrid, you must adjust that channel.
• If you replace the system board, you must adjust both channels.
• If you replace the attenuator, you must adjust both channels.
4-52
Service
Replacing Parts in the Oscilloscope
To remove and replace a hybrid connector
Two screws (H9) through the hybrid connector (figure 4-9) hold the bottom
plate to the underside of the system board. If the hybrid connector is
removed, the bottom plate is able to fall away from the board.
Disassembly hint
The bottom plate may stick to the bottom of the board by itself because of
adhesives that fasten an insulator to the plate. If the connector is very gently
removed and replaced, you may be able to replace the connector without
removing the system board. The key is to apply very little pressure while
removing the connector screws. Too much pressure will push the plate away
from the bottom of the board. If the plate falls from the board, you will have to
remove the system board to reinstall the connector.
1 Follow the previous procedure to remove the acquisition hybrid.
2 Remove the two screws (H9) to remove the hybrid connector.
3 Reassemble using a T6 torque driver set to 0.23 Nm (2 in-lbs) to
tighten the hybrid connector screws.
4-53
Service
Replacing Parts in the Oscilloscope
To remove the power supply
1 Remove the fan.
2 Disconnect the ground wire (green wire with the yellow stripe) from
the deck.
3 Disconnect the ribbon cable from the power supply board.
When reconnecting the cable, position both connectors on their mating pieces,
then push on one connector at a time. Do not use more force than required.
4 Use a screw driver to gently unhook the latch that holds the white
shaft to the power switch, then disconnect the shaft from the power
switch. After you disconnect the shaft, make sure you position it in
the recess along the side of the display bracket.
Figure 4-10
5 Using the T10 TORX driver, remove the screw holding the power
supply board to the deck.
6 Slide the power supply board towards the front panel about a half an
inch. Slip the keyhole slots on the power supply board off of the pins
on the deck.
4-54
Service
Replacing Parts in the Oscilloscope
To remove the keyboard
1 Remove the front panel.
2 Remove all the knobs by pulling straight out.
3 Flex the bezel of the front panel to unsnap the small keyboard under
the display opening.
4 Using the T10 TORX driver, remove the three screws from the large
keyboard.
Make sure that when you reinstall these screws that you use the correct
parts. If longer screws are used, they can damage the front-panel label.
5 Press down on the top of the keyboard, and rotate the bottom of the
keyboard out.
When installing the keyboard, make sure that the probe compensation cable
is kept away from the keyboard cable or noise can occur in the probe
compensation signal. See figure below for positioning the keyboard cable on
the 54615B and 54616B.
Figure 4-11
Probe compensation cable
Keyboard cable
on 54615B and
54616B
Positioning keyboard cable on 54615B and 54616B
4-55
Service
Replacing Parts in the Oscilloscope
To remove the handle
• Rotate the handle down until it is just past the last detent position
(about 1/2 inch before the handle touches the bottom of the
oscilloscope), then pull the sides of the handle out of the cabinet.
To remove the Option 005 board
1 Remove the oscilloscope from the cabinet.
a Turn off the oscilloscope and disconnect the power cable.
b If a module is installed in the oscilloscope, remove it.
c Using the T15 TORX driver, remove the two screws from the rear of
the cabinet.
d Using your thumbs, gently push on the two rear-panel connectors to
slide the oscilloscope out of the cabinet.
2 Remove the faulty Option 005 board.
a Using a T10 TORX driver, remove the two screws that lock the
Option 005 board to the chassis.
b Slide the board back away from the front panel to release it from the
keyholes.
c Disconnect the three cables attached to the Option 005 board.
d Remove the board from the keyholes, and from the oscilloscope.
4-56
Service
Replacing Parts in the Oscilloscope
To order a replacement part
The system board is part of an exchange program with Agilent Technologies.
The exchange program allows you to exchange a faulty assembly with one
that has been repaired and performance verified by Agilent Technologies.
After you receive the exchange assembly, return the defective assembly to
Agilent Technologies. A United States customer has 30 days to return the
defective assembly. If you do not return the faulty assembly within the 30
days, Agilent Technologies will charge you an additional amount. This
amount is the difference in price between a new assembly and that of the
exchange assembly. For orders not originating in the United States, contact
your nearest Agilent Technologies Sales Office for information.
4-57
Service
Replacing Parts in the Oscilloscope
• To order a part in the material list, quote the Agilent Technologies
part number, indicate the quantity desired, and address the order to
your nearest Agilent Technologies Sales Office.
• To order a part not listed in the material list, include the model
number and serial number of the oscilloscope, a description of the
part (including its function), and the number of parts required.
Address the order to your nearest Agilent Technologies Sales Office.
• To order using the direct mail order system, contact your nearest
Agilent Technologies Sales office.
Within the USA, Agilent Technologies can supply parts through a direct mail
order system. The advantages to the system are, direct ordering and
shipment from the Agilent Technologies Parts Center in Roseville, California.
There is no maximum or minimum on any mail order. (There is a minimum
amount for parts ordered through a local Agilent Technologies Sales Office
when the orders require billing and invoicing.) Transportation costs are
prepaid (there is a small handling charge for each order) and no invoices.
In order for Agilent Technologies to provide these advantages, a check or
money order must accompany each order. Mail order forms and specific
ordering information are available through your local Agilent Technologies
Sales Office. Addresses and telephone numbers are located in a separate
document shipped with the instrument.
4-58
Service
Replacing Parts in the Oscilloscope
Figure 4-12
A6 and A7 on
opposite side of A3.
See detail on next
page
Probe sense nuts
mounted on outside of
front panel
Exploded view of oscilloscope
4-59
Service
Replacing Parts in the Oscilloscope
Figure 4–13
MP21
Heatsink
Spring
H8
Screws (2)
MP20
Heatsink
MP19
Standoff (2)
H10
Screws (2)
MP25
Top Plate
A6 or A7
Acquisition
Hybrid
H9
Screws (2)
E1
Connector
A3 System
Board
MP24
Bottom Plate
A6/A7 Acquisition Hybrid and associated mounting parts
4-60
Service
Replacing Parts in the Oscilloscope
Table 4-16
54615B, 54616B, and 54616C Replaceable Parts
Reference
Designator
Agilent Part
Number
Qty Description
A1
A2
A2
A2
0950-2735
2090-0316
54620-68801
54620-69801
1
1
1
1
Power supply assembly
54615B/16B display assembly
54616C display assembly
54616C exchange display assembly
A3
54630-66501
1
A3
54630-69501
54615B system board (includes Acquisition
hybrids A6 and A7, but not attenuators)
54615B exchange system board (includes
Acquisition hybrids A6 and A7, but not attenuators)
A3
54616-66501
1
A3
54616-69501
54616B system board (includes Acquisition
hybrids A6 and A7, but not attenuators)
54616B exchange system board (includes
Acquisition hybrids A6 and A7, but not attenuators)
A3
54615-66505
1
A3
54615-69505
54616C system board (includes Acquisition
hybrids A6 and A7, but not attenuators)
54616C exchange system board (includes
Acquisition hybrids A6 and A7, but not attenuators)
A4
A5
A5
A6
A7
54600-66502
54615-63403
54615-69403
1NB7-8353
1NB7-8353
1
1
1
2
Keyboard
Attenuator assembly
Attenuator assembly, exchange
Acquisition hybrid (channel 1)
Acquisition hybrid (channel 2)
B1
3160-1006
1
Fan
E1
54542-67601
2
Connector assembly–hybrid mount
H1
H2
H3
H4
H5
0515-0372
0515-0380
0515-0430
1250-2075
2190-0068
16
5
5
1
1
Machine screw M3 X 8
Machine screw M4 X 10
Machine screw M3 X 6
RF connector nut, 0.56 inch
Lock washer
4-61
Service
Replacing Parts in the Oscilloscope
Reference
Designator
Agilent Part
Number
Qty Description
H6
H7
H8
H9
H10
0380-0912
0515-1025
0515-0365
0515-2363
0515-1908
1
1
4
4
4
Spacer
Machine screw M3 X 26
MS M2 X 0.4, 4mm-lg T6 pan head
MS M2 X 0.4, 8mm-lg T6 flat head
MS M2 X 0.4
MP1
MP2
MP3
1251-2485
1400-1581
54610-41901
1
1
1
Connector dust cover
Cable clamp
Main keypad
MP4
MP4
MP4
54615-94301
54616-94301
54616-94303
1
1
1
54615B front-panel label
54616B front-panel label
54616C front-panel label
MP5
MP5
MP5
54615-94302
54616-94302
54616-94304
1
1
1
54615B handle Label
54616B handle Label
54616C handle Label
MP6
MP7
MP8
MP9
MP10
54601-00102
5081-7741
54601-41902
54601-42201
54601-43701
1
1
1
1
1
Deck
Safety shield sheet
Small rubber keypad
Front panel
Power-switch shaft
MP11
MP12
MP13
MP14
MP15
54630-64402
54601-44901
54601-47401
54601-47404
54601-47402
1
1
5
1
3
Cabinet (comes with handle and feet installed)
Handle
Small knob - light
Small-knob - dark
Large knob - dark
MP16
MP17
MP18
MP19
MP20
54601-47403
54630-94303
54610-42501
54542-22401
54542-21101
1
1
3
4
2
Intensity knob
Cabinet label
Probe sense nut
Heatsink standoff
Heatsink
MP21
MP22
MP23
MP24
MP25
54542-09101
54630-94305
5090-4873
54542-04101
54542-04102
2
1
1
2
2
Heatsink spring
Label - power
Label - CSA
Bottom plate
Top plate
4-62
Service
Replacing Parts in the Oscilloscope
Reference
Designator
Agilent Part
Number
Qty Description
W1
W1
W1
W1
W1
8120-1521
8120-1703
8120-0696
8120-1692
8120-0698
1
W1
W1
W1
W1
8120-2296
8120-2957
8120-4600
8120-4754
W2
W3
W3
54630-61602
54630-61601
54620-61602
1
1
1
Power supply cable
54615B/16B display cable
54616C display cable
10073A
2
Passive probes, 10X
Standard power cord
Power cord option 900, United Kingdom
Power cord option 901, Australia
Power cord option 902, Europe
Power cord option 904, 250 V, USA/Canada
Power cord option 906, Switzerland
Power cord option 912, Denmark
Power cord option 917, Africa
Power cord option 918, Japan
Option 101
Accessory pouch and front-panel cover.
5041-9411
54601-44101
Pouch
Front-panel cover
4-63
Service
Replacing Parts in the Oscilloscope
Figure 4-14
Exploded view of Option 005 and related oscilloscope parts
4-64
Service
Replacing Parts in the Oscilloscope
Table 4-17
Option 005 Replaceable Parts
Reference
Designator
A3
A5
Agilent Part
Number
*
54602-66502
Qty Description
1
1
System Board (part of standard instrument)
Video Trigger Board
H2
H3
0515-0380
0515-0430
5
7
Machine screw M4 X 10 (part of standard instrument)
Machine screw M3 X 6 (+2 screws for Option 005)
MP6
MP11
54601-00101
54602-64402
1
1
MP30
54602-94305
1
Deck (part of standard instrument)
Cabinet (comes with handle and feet installed –
replaces standard cabinet)
Label, rear panel video trigger
W4
W5
54602-61601
54602-61602
2
1
RF cable
Ribbon cable
11094B
1
75Ω Termination
* See the 54615B, 54616B, and 54616C Replaceable Parts table for
the Agilent part number of the A3 System Board.
4-65
4-66
5
Performance Characteristics
Performance Characteristics
The performance characteristics describe the typical performance of
the new 54615B, 54616B, and 54616C oscilloscopes. You will notice
that some of the characteristics are marked as tested, these are values
that you can verify with the performance tests under "Verifying
Oscilloscope Performance," on page 4-5.
Vertical System
Bandwidth1
dc to 500 MHz ±3 dB
ac coupled, 10 Hz to 500 MHz ±3 dB
Rise time 700 ps (calculated)
Dynamic range ±12 divisions from center screen
Math functions Channel 1 + or − Channel 2
Input resistance 1 MΩ or 50Ω selectable
Input capacitance ≈9 pf
Maximum input voltage 250 V [dc + peak ac(<10 kHz)] or
5 Vrms in 50Ω mode
1
Tested, see "To verify bandwidth" on page 4-10.
Upper bandwidth reduced 2 MHz per degree C above 35°C
5-2
Performance Characteristics
Vertical System
Sensitivity 2 mV/div to 5 V/div
Accuracy1 ±2.0% of full scale
Verniers1 Fully calibrated, accuracy ±2.0 % of full scale
Cursor accuracy1, 2, 3
Single cursor accuracy: vertical accuracy ±1.2% of full scale ±0.5% of
position value
Dual cursor accuracy: vertical accuracy ±0.4% of full scale
Bandwidth limit ≈30 MHz
Coupling Ground, ac, and dc
Inversion Channel 1 and channel 2
CMRR (common mode rejection ratio) ≥ 20 dB at 50 MHz
Probe Sense Automatic readout of 1X, 10X, 20X and 100X probes
50Ω protection Protects 50Ω load from excessive voltage.
Time skew Adjustable over a range of ±25 ns to remove effects of cabling
and probe delays.
1
2
3
When the temperature is within ±10 °C from the calibration temperature.
Magnification is used below 7 mV/div range. Below 7 mV/div full scale is
defined as 56 mV.
Tested, see "To verify voltage measurement accuracy" on page 4-8.
5-3
Performance Characteristics
Horizontal System
Horizontal System
Sweep speeds 5 s/div to 1 ns/div main and delayed
Accuracy ±0.005% of reading
Horizontal resolution 20 ps
Cursor accuracy1 (∆t and 1/∆t) ±0.005% ±0.2% of full scale ±100 ps
Delay jitter ≤1 ppm
Pretrigger delay (negative time)
54615B–The greater of 30 µs or 60 divisions, not to exceed 100 s
54616B/16C–The greater of 15 µs or 60 divisions, not to exceed 100 s.
Posttrigger delay (from trigger point to start of sweep)
The greater of 10 ms or 20,000 divisions, not to exceed 100 s.
Delayed sweep operation
Up to 200 times main sweep when main sweep is from 5 s/div to 10 ms/div.
Up to 1 ns/div with main sweep set to 5 ms/div and faster.
Horizontal modes Main, Delayed (Alt), X-Y, and Roll
1
Tested, see "To verify horizontal ∆t and 1/∆t accuracy," on page 4-13.
5-4
Performance Characteristics
Trigger System
Trigger System
Sources Channels 1, 2, line, and external
Internal trigger
Sensitivity1
dc to 100 MHz:
100 MHz to 500 MHz:
0.50 div or 5.0 mV
1 div or 10 mV
Coupling
ac, dc, LF reject, HF reject, and noise reject
LF reject attenuates –3 dB for signals below 50 kHz, and
HF reject attenuates –3 dB for signals above 50 kHz
Modes Auto, Autolevel, Normal, Single, and TV
TV triggering Available on channels 1 and 2
TV line and field 0.5 division of composite sync for stable display
Holdoff Adjustable from 300 ns to ≈13 s
External trigger
Range ±2 V
Sensitivity1
dc to 100 MHz:
100 MHz to 500 MHz:
<75 mV
<150 mV
Coupling ac, dc
Input resistance 1 MΩ or 50Ω
Input capacitance ≈12 pf
Maximum input voltage 250 V [dc + peak ac(<10 kHz)]
50Ω protection Protects 50Ω load from excessive voltage.
Probe Sense Automatic readout of 1X, 10X, 20X, and 100X probes
1
Tested, see "To verify trigger sensitivity," on page 4-15.
5-5
Performance Characteristics
TV Functions
TV Functions
Line counting Delay time calibrated in NTSC and PAL line numbers.
All field trigger Oscilloscope triggers on the vertical sync pulse in both
fields allowing use with non-interlaced video.
XY Operation
Operating mode X=Channel 1, Y=Channel 2
Bandwidths X-axis and Y-axis same as vertical system
Phase difference ±3 degrees at 10 MHz
Display System
Display
54615B/16B — 7-inch raster CRT
54616C — 5.8-inch Active Matrix Color LCD Display. The present
state-of-the-art for the color displays allows for some pixel defects to be
present. The number of these allowed is no more than six active (those which
cannot be turned off), and six inactive (those which cannot be turned on).
Resolution 256 vertical by 500 horizontal points
Controls Front-panel intensity control (54615B/16B only)
Graticule 8 × 10 grid or frame
Storage Scope Autostore saves previous sweeps in half bright display and
the most recent sweep in full bright display. This allows easy differentiation
of current and historic information.
5-6
Performance Characteristics
Acquisition System
Acquisition System
Maximum sample rate
54615B – 1 GSa/s simultaneous on 2 channels
54616B/16C – 2 GSa/s simultaneous on 2 channels
Resolution 8 bits
Simultaneous channels Channels 1 and 2
Record length
Vectors off:
5000 points
4000 points (200 ns/div, 54615B)
4000 points (100 ns/div, 54616B/16C)
1000 points (peak detect on)
Vectors on:
2000 points
1000 points (peak detect on)
Roll Mode (vectors off or on):
1000 points
500 points (200 ms/div, channel 1 and 2 on, 54615B/16B)
Single-shot bandwidth
54615B – 250 MHz on channels 1 and 2 simultaneously (1 GSa/s,
display vectors on)
54616B/16C – 500 MHz on channels 1 and 2 simultaneously (2 GSa/s,
display vectors on)
Acquisition modes Normal, Peak Detect, and Average
Peak detect 1 ns glitch capture
Average Number of averages selectable at 8, 64, and 256
Roll Mode At sweep speeds of 200 ms/div and slower (54615B/16B)
At sweep speeds of 500 ms/div and slower (54616C):
waveform data moves across the display from right to left with no
dead time. Display can be either free-running (non-triggered) or
triggered to stop on a trigger event.
5-7
Performance Characteristics
Advanced Functions
Advanced Functions
Automatic measurements (measurements are continuously updated)
Voltage Vavg, Vrms, Vp-p, Vtop, Vbase, Vmin, Vmax
Time Frequency, period, + width, – width, duty cycle, rise time, and
fall time
Cursor Measurements Four cursors can be positioned on the display to
make time voltage measurements. The cursors will track changes in
position and delay controls. Readout in V, T.
Setup functions
Autoscale Sets vertical and horizontal deflections and trigger level.
Requires a signal with a frequency >49 Hz, duty cycle >0.5% and voltage
level : channels 1 and 2 > 20 mVp-p,
Save/Recall 16 front-panel setups can be stored and recalled from
nonvolatile memory.
Trace memory Two volatile pixel memories allow storage of
multi-valued waveforms.
Power Requirements
Line voltage range 100 Vac to 240 Vac
Line voltage selection Automatic
Line frequency 45 Hz to 440 Hz
Maximum power consumption 300 VA
5-8
Performance Characteristics
General (54615B and 54616B only)
General (54615B and 54616B only)
Environmental
characteristics
The instrument meets or exceeds the environmental requirements of
MIL-T-28800E for Type III, Class 3, Style D equipment as described below.
Ambient temperature (Tested to MIL-T-28800E paragraph 4.5.5.1.1)
Operating –10 °C to +55 °C
Nonoperating –51 °C to +71 °C
Humidity tested to Agilent Technologies environmental specification
section 758 paragraphs 4.0, 4.1, and 4.2 for class B-1 products
Operating 95% relative humidity at +40 °C for 24 hours
Nonoperating 90% relative humidity at +65 °C for 24 hours
Altitude (Tested to MIL-T-28800E paragraph 4.5.5.2)
Operating to 4,500 m
Nonoperating to 15,000 m
EMI
EMI (commercial) CISPR 11 Group1 Class A
EMI Meets the requirements in accordance with MIL-T-28800E (prior to
Interim Amendment 1) and MIL-STD-461C as described below.
CE01 Part 2 narrow band requirements up to 15 kHz
CE03 Part 2
CS01 Part 2
CS02 Part 2 limited to 100 MHz
CS06 Part 5 limited to 400 V
5-9
Performance Characteristics
General (54615B and 54616B only)
RE01 Part 5 measured at 15.24 cm and exceptioned from 19kHz to 50 kHz.
RE02 Part 2 (limited to 1 GHz) Full limits of class A1C and A1F, with option
002 installed; without option 002 installed 10 dB relaxation, 14 kHz to 100
kHz
RS03 Part 2, limited to 1 V/meter from 14 kHz to 1 GHz. Slight trace
susceptibility from 450 MHz to 600 MHz and at 950 MHz.
Vibration
Operating 15 minutes along each of the 3 major axes; 0.635 mm
displacement, 10 Hz to 55 Hz in one-minute cycles. Held for 10 minutes at 55
Hz (4 g at 55 Hz).
Nonoperating survival random vibration, 5Hz to 500 Hz at 2.41 grms.
Shock
Operating 30 g, 1/2 sine, 11 ms duration, 3 shocks per axis along major axis.
Total of 18 shocks.
5-10
Performance Characteristics
General (54616C only)
General (54616C only)
Environmental
characteristics
These general characteristics apply to the 54616C only. This instrument
meets Agilent Technologies environmental specifications (section 750) for
class B-1 products.
Ambient temperature
Operating 0 °C to +55 °C
Nonoperating –40 °C to +70 °C
Humidity
Operating 95% relative humidity at +40 °C for 24 hours
Nonoperating 90% relative humidity at +65 °C for 24 hours
Altitude
Operating to 3,048 m
Nonoperating to 12,192 m
Vibration
Operating Random vibration 5-500 Hz, 10 minutes per axis, 0.3 grms.
Nonoperating Random vibration 5-500 Hz, 10 minutes per axis, 2.41 grms;
Resondant search, 5-500 Hz swept sine, 1 octave/minute sweep rate, 0.75 g,
5-minute resonant dwell at 4 resonances per axis.
Shock
Operating Half-sine pulse, 2.8 meters/second, along all 6 axes.
Nonoperating Trapezoidal pulse, 7.4 meters/second, along all 6 axes.
5-11
Performance Characteristics
General (54615B, 54616B, and 54616C)
General (54615B, 54616B, and 54616C)
Physical
characteristics
Size (excluding handle)
Height 172 mm
Width 322 mm
Depth 317 mm
Weight: 6.6 kg
Product Regulations
Safety
IEC 1010-1:1990+A1 / EN 61010-1:1993
UL 3111
CSA-C22.2 No.1010.1:1993
EMC
This Product meets the requirement of the European Communities (EC)
EMC Directive 89/336/EEC.
Emissions
EN55011/CISPR 11 (ISM, Group 1, Class A equipment)
Notes2
Immunity
EN50082-1
Code1
IEC 555-2
1
IEC 555-3
1
IEC 801-2 (ESD) 8kV AD
1,2
*
IEC 801-3 (Rad.) 3 V/m
2
IEC 801-4 (EFT) 1kV
1,2
*
Sound
Pressure
Level
5-12
1
Performance Codes:
1 PASS - Normal operation, no effect.
2 PASS - Temporary degradation, self recoverable.
3 PASS - Temporary degradation, operator intervention required.
4 FAIL - Not recoverable, component damage.
2
Notes:
* Code 1 for 54616C
Code 2 for 54615B and 54616B
Less than 60 dBA
Performance Characteristics
Option 005 General Performance Characteristics
Option 005 General Performance Characteristics
Video Standards
Video Trigger
Modes
NTSC
PAL
PAL-M
SECAM
Generic
Line (number) of Field 1
Field 2
Alternate Fields
All Lines
Field 1 Defined as that field with the 3 lines of vertical sync starting at
line 4. Is actually color field 1 or color field 3.
Field 2 Defined as that field with the 3 lines of vertical sync starting at the
midpoint of line 3. Is actually color field 2 or color field 4.
All Fields
5-13
Performance Characteristics
Option 005 Trigger System
Option 005 Trigger System
Internal trigger
Sensitivity Performance remains unchanged
Coupling Performance remains unchanged
Modes Performance remains unchanged
Holdoff Performance remains unchanged
TV triggering Available on channels 1 and 2 only
TV line and field 0.5 division of composite sync for stable display
External trigger
Performance remains unchanged
Vertical output
Connector Rear panel BNC (f)
Source Impedance 50Ω (nominal)
Signal source selected by internal trigger source
Amplitude approximately 90mVp-p into 50Ω for a full scale display at full
bandwidth of the oscilloscope
TV Trigger output
Connector Rear panel BNC (f)
Amplitude TTL
Pulse width a function of TV trigger mode, Minimum approximately 5us in
line modes to the width of a field in field modes
Delay from Vertical Output approximately 400ns.
5-14
Glossary
This glossary is organized into
two parts: oscilloscope and
TV/video trigger terms. The
TV/video trigger terms apply to
oscilloscopes with Option 005
installed.
Oscilloscope Terms
50Ω Input Protection This only
functions when the scope is powered
on. The 50Ω load will typically disconnect if greater than 5 Vrms is
detected. However, the inputs could
still be damaged, depending on the
time constant of the signal.
Auto A trigger mode that produces a baseline display if the trigger
conditions are not met. If the trigger
frequency is less than 25 Hz, a free
running display will result even if the
level and slope conditions are met.
Auto Level The oscilloscope sets
the trigger point to the 50% amplitude point on the displayed
waveform. If there is no signal present, a baseline is displayed.
Autoscale Front-panel key that
automatically sets up the oscilloscope to display a signal.
Autostore displays the stored
waveforms in half bright, and the
most recent trace is displayed in full
bright.
Baseline Free running trace on
the display when no signal is applied
and the trigger mode is set to auto or
auto level.
BW Lim (Bandwidth Limit) Limits
the displayed bandwidth of the selected channel to 30 MHz, and is
available for channels 1 and 2 only.
This feature is useful for viewing
noisy signals
Couplng (Coupling) This changes
the input coupling. Channels 1 and
2 allow dc, ac, or ground. External
Trigger allow dc or ac.
Cursors Horizontal and vertical
markers used for making custom voltage and time measurements.
Delay In main sweep, the delay
knob moves the sweep horizontally,
and indicates how far the time reference is from the trigger point. In
delayed sweep the delay knob moves
the starting point of the portion of
the main sweep to be expanded by
the delayed sweep.
Glossary–1
Glossary
Delayed Gives an expanded view
of the main sweep.
Deskewing The removal of time
offset errors between two signals.
The error is typically due to differences in either cable lengths or
characteristics. Also called Time
Null.
Display Allows selection of either
normal, peak detect, or averaged display modes.
Erase Clears the display.
External Trigger Extra input to
the oscilloscope normally used for
triggering.
Field 1 Triggers on the field 1 portion of the video signal.
Field 2 Triggers on the field 2 portion of the video signal.
HF Reject (high frequency reject)
Adds a low pass filter with a 3 dB
point at 50 KHz to the trigger path.
Holdoff Keeps the trigger from rearming for an amount of time set by
the holdoff knob.
Glossary–2
Internal Trigger The oscilloscope
triggers from a channel input that
you choose.
Invert Invert changes the polarity
of the waveform, and is available for
channels 1 and 2. When the oscilloscope is triggered on the signal to be
inverted, the trigger is not inverted.
Level Front-panel knob that
changes the trigger level.
LF Reject (low frequency reject)
Adds a high pass filter with a 3 dB
point at 50 KHz to the trigger path.
Line In TV trigger mode, the oscilloscope triggers on the TV line sync
pulses. As a trigger source, the oscilloscope triggers off of the power line
frequency.
Main Sets the oscilloscope to a
volts vs time display that displays
the main time base sweep.
Mode Allows you to select one of
five trigger modes, Auto level, Auto,
Normal, Single, TV.
Noise Rej (noise reject) Decreases the trigger sensitivity to
reduce the triggering on signal noise.
Glossary
Normal If a trigger signal is present and the trigger conditions are
met, a waveform is displayed. If
there is no trigger signal, the oscilloscope does not trigger and the
display is not updated.
Recall Recalls a selected frontpanel setup that you saved to one of
16 memory locations. Memory selection is with either a softkey or the
knob closest to the Cursors frontpanel key.
Peak Det (1 ns peak detect) Allows detection of signal extremes as
the sample rate is decreased in the
5 s to 500 ns/div time base settings.
Recall Setup Recalls the frontpanel setup that was saved with a
waveform.
Polarity Selects either positive or
negative TV sync pulses.
Position Knob that moves the signal vertically on the display.
Print/Utility Allows access to the
module menus and service menus.
Probe Allows selection of 1, 10,
20, or 100 to match a probe’s division ratio so that the vertical scaling
and voltage measurements reflect
the actual voltage levels at the tip of
the probe.
Probe Sense Automatically
detects the division ratio of the
probe.
Run The oscilloscope acquires
data and displays the most recent
trace.
Save Saves the current front-panel
setup to one of the possible 16 memory locations. Memory selection is
with either a softkey or the knob
closest to the Cursors front-panel
key.
Setup Allows access to front-panel
setup keys.
Single (single shot) The oscilloscope triggers once when the trigger
conditions are met. The oscilloscope
must be rearmed before the oscilloscope retriggers by pressing either
the Run or Autostore front-panel
keys.
Glossary–3
Glossary
Skew Time offset between two signals, typically due to differences in
either cable lengths or
characteristics.
Time Ref Lft Cntr (time reference left or center) Sets the time
reference to either one graticule in
from the left edge of the display or
to center of the display.
Slope/Coupling Allows access to
the trigger slope and input coupling
menus.
Trace Allows access to the trace
storage keys.
Slope Selects either the rising or
falling edge of the signal to trigger
the oscilloscope.
Trace Mem (trace memory) One
of two pixel memory locations used
for storing traces.
Source Allows you to select a trigger source.
TV Allows access to the TV or
video trigger keys.
Stop Freezes the display.
Vernier Vernier allows a calibrated fine adjustment with the
channel 1 and 2 Volts/Div knob.
Time Allows access to the automatic time measurement keys.
Time/Div Changes the time base
in a 1-2-5 step sequence from 1 ns to
5 s.
Time Null The removal of time offset errors between two signals. The
error is typically due to differences
in either cable lengths or characteristics. Also called
deskewing.
Glossary–4
Voltage Allows access to the automatic voltage measurement keys.
Volts/Div Changes the vertical
scaling in a 1-2-5 step sequence from
2 mV to 5 V.
XY Changes the display to a volts
versus volts display.
Glossary
TV/Video Trigger Terms
Blanking Level The level of the
composite picture signal that
separates the range containing
picture information from the range
containing synchronizing
information. (IEEE Definition)
Chrominance That property of
light which produces a sensation of
color in the human eye apart from
any variation in luminance that may
be present.
Chrominance Signal That portion of the color television signal
which contains the color information. (STOC Definition)
Color Burst In color systems, this
normally refers to a burst of subcarrier frequency (8 to 10 cycles of
3.579545 MHz in NTSC systems) on
the back porch of the composite
video signal used to establish a frequency and phase reference for the
chrominance signal.
Composite Sync The line and
field rate synchronizing pulses
(including the field equalizing
pulses), when combined together,
form the composite sync signal.
Composite Video For color, this
consists of blanking, field, and line
synchronizing signals, color synchronizing signals, plus chrominance and
luminance picture information.
These are all combined to form the
complete color video signal.
Equalizing Pulses Pulses of one
half the width of the horizontal sync
pulses which are transmitted at
twice the rate of the horizontal sync
pulses during the portions of the
vertical blanking interval immediately preceding and following the
vertical sync pulse. These pulses
cause the vertical deflection to start
at the same time in each interval.
They also keep the horizontal sweep
circuits in step during the portions of
the vertical blanking interval
immediately preceding and following
the vertical sync pulse.
Field One of the two (or more)
equal parts of information into which
a frame is divided in
interlace scanning; alternately, one
half of a complete picture (or frame)
interval, containing all of the odd, or
all of the even, lines of the picture.
Field 1 Triggers on the field 1 portion of the video signal.
Glossary–5
Glossary
Field 2 Triggers on the field 2 portion of the video signal.
Frame One complete picture
consisting of two fields of interlaced
scanning lines.
HF Reject (high frequency reject)
Adds a low pass filter with a 3 dB
point at 50 KHz to the trigger path.
Holdoff Keeps the trigger from rearming for an amount of time set by
the holdoff knob.
Internal Trigger The oscilloscope
triggers from a channel input that
you choose.
Invert Invert shifts the displayed
waveform 180 degree, and is available for channels 1 and 2 only.
When the oscilloscope is triggered
on the signal to be inverted, the trigger is also inverted.
IRE An abbreviation for Institute
of Radio Engineers.
IRE Scale An oscilloscope scale
that applies to composite video
levels. There are 140 IRE units in
one volt.
Glossary–6
Line In TV trigger mode, the oscilloscope triggers on the TV line sync
pulses. As a trigger source, the oscilloscope triggers off of the power line
frequency.
Luminance The amount of light
intensity, which is perceived by the
eye as brightness (referred to as "Y")
Main Sets the oscilloscope to a
volts vs time display that displays
the main time base sweep.
Mode Allows you to select one of
five trigger modes, Auto level, Auto,
Normal, Single, TV.
Noise Rej (noise reject) Decreases the trigger sensitivity to
reduce the triggering on signal noise.
NTSC National Television
Systems Committee. An industrywide engineering group which,
during 1950-1953, developed the
color television specifications now established in the United States,
Canada, Japan, and Mexico. A 525
line, 60 Hz field, 4.2 MHz system.
Two frames (4 fields) for picture
completion.
Glossary
PAL Phase Alternating Line or
Phase Alteration Line rate. Color
television standards used in Europe.
A 625 line, 50 Hz field system. Eight
fields for picture completion.
PAL-M Phase Alternating Line or
Phase Alteration Line rate. A version
of the European system adapted to
a 525 line, 60 Hz field, 4.2 MHz bandwidth used in Brazil.
SECAM SEquentiel Couleur Avec
Memoire. An acronym derived from
the French phrase meaning Sequential Color with Memory. Color
television specifications used primarily in France and the former Soviet
Union. A 625 line, 50 Hz field, wide
bandwidth system. Two frames (4
fields) required for
picture completion
Vertical Blanking Interval The
blanking portion at the beginning of
each field. It contains the equalizing
pulses, the vertical sync pulses, and
VITS (if desired). Presently 18 to 21
lines in duration.
Vertical Interval Reference (VIR)
A signal used as a reference for amplitude and phase characteristics of
a color television program (FCC assigned to line 19).
Vertical Interval Test Signal
A signal which may be included during the vertical blanking interval to
permit in-service testing and adjustment of video transmission.
Sync An abbreviation for the
words "synchronization," "synchronizing," etc. Applies to the
synchronization signals, or timing
pulses, which lock the electron beam
of the picture monitors in step, both
horizontally and vertically, with the
electron beam of the pickup tube.
The color sync signal (NTSC) is
known as the color burst.
Glossary–7
Glossary–8
Index
A
ac coupling, 1–8, 1–13, 5–3, 5–5
accuracy
cursors, 5–3 to 5–4
horizontal, 5–4
vertical, 5–3
acquisition characteristics, 5–7
Active Cursor, 2–23
adjustments
display, 4–29 to 4–30
high frequency, 4–21 to 4–31
low frequency, 4–21 to 4–31
power supply, 4–22 to 4–23
advance functions, 5–8
All Fields, 3–9
Alt Fld
See alternate fields
Alternate color palettes, 1–17
alternate fields, 3–5
altitude characteristics, 5–9, 5–11
ambient temperature, 4–21, 5–9, 5–11
assembly replacement, 4–46
attenuation factor
of probe, 1–6
Auto, 1–14
auto level, 1–14
Auto Level softkey, 1–14
Auto softkey, 1–14
automatic measurement, 3–14
automatic measurements
time, 2–16 to 2–18
voltage, 2–19 to 2–22
automatic probe sensing, 1–5
autoscale
characteristics, 5–8
to autoscale, 1–7
Undo, 1–7, 2–35
video, 3–4, 3–12, 3–16
autostore, 2–6 to 2–7, 2–9 to 2–10
Av, 2–32
Average softkey, 2–32
averaging, 2–32, 5–7
B
bandwidth
characteristics, 5–2
limit, 5–3
single shot, 2–9, 5–7
to verify, 4–10
XY, 5–6
C
calibration
adjustments, 4–21 to 4–31
delay, 4–26
self, 4–25 to 4–26
vertical, 4–26
Calibrator, 4–6, 4–25
channel signal connection, 1–5
channels
preset configuration, 2–35
characteristics, 5–2 to 5–5, 5–8 to 5–10
clamp circuit
internal, 3–16
clamping
external, 3–16
Clear Cursors softkey, 2–23
Clear Meas softkey, 2–17
clear measurement, 2–17
Clear softkey, 2–33
clearing error messages, 4–37
color
overview, 1–17
selecting palettes, 1–18 to 1–19
color burst, 2–42
color palettes, 1–17
compensation probe, 1–6
complex waveforms, 2–12
configuration
preset default settings, 2–35
connect to instrument(s), 3–20
coupling, 5–14
ac, 1–8, 1–13, 5–3, 5–5, 5–14
dc, 1–8, 1–13, 5–3, 5–5
cursor
active, 3–12
clear, 3–12
time, 3–12
voltage, 3–12
cursor measurements, 2–23 to 2–26, 3–12
to 3–13
Cursors
active, 2–23
clear, 2–23
preset configuration, 2–35
Cursors key, 2–23
custom measurements, 2–23, 3–12
D
DAC softkey, 4–6
dc coupling, 1–8, 1–13, 5–5
DC level shifts, 3–16
Default color palette, 1–17
default setup, 2–35
delay, 1–12
delay calibration, 4–26
Delay knobs, 2–3, 3–14
Delayed softkey, 2–3, 3–14
delayed sweep, 3–14, 3–17
characteristics, 2–3 to 2–5, 3–14 to 3–15,
5–4
operation, 2–3 to 2–5, 3–14 to 3–15
delta t/delta V
See cursor measurements
disassembly, 4–46
display
characteristics, 5–6
to adjust, 4–29 to 4–30
to erase, 2–8
Display softkey, 4–29
distortion
harmonic, 3–18 to 3–19
worst case, 3–10
domain
frequency, 3–18 to 3–19
time, 3–18 to 3–19
Duty Cy softkey, 2–17
duty cycle, 2–16 to 2–17
E
EMI, 5–9
Erase softkey, 2–7 to 2–8
erasing the display, 2–8
error messages
clearing, 4–37
keydown powerup, 4–37
even field, 3–10 to 3–11
expand vertical signal, 1–10
exploded view, 4–59
external trigger, 1–5, 1–15, 5–5, 5–14
Index-1
Index
F
fail messages
clearing, 4–37
keydown powerup, 4–37
fall time, 2–16, 2–18
Fast Fourier Transform (FFT), 3–18 to
3–19
Field 1, 3–8
Field 1 softkey, 2–40
Field 2, 3–8
Field 2 softkey, 2–40
fields
all, 3–9
alternate, 3–5
even, 3–10 to 3–11
Field 1, 3–5, 3–10 to 3–11
Field 2, 3–5, 3–10 to 3–11
Field 3, 3–10 to 3–11
Field 4, 3–10
odd, 3–10 to 3–11
firmware calibration, 4–25
Freq softkey, 2–14
frequencies
multi-burst, 3–14
frequency
measurements, 2–14 to 2–15, 2–17
reject, 2–31, 2–40, 5–5
frequency domain, 3–18 to 3–19
frequency domain analysis, 3–18
front-panel keys
See keys listed by name
G
general characteristics, 5–9 to 5–10
GENERIC, 3–4 to 3–6
glitch capture, 2–10 to 2–11
graticule
preset configuration, 2–35
TV, 3–12, 3–14
grid
softkeys, 3–2
tv, 3–4
Index-2
H
half bright contrast, 4–30
HF Rej softkey, 2–40
high frequency pulse response, 4–27
high frequency reject, 2–40, 5–5
holdoff, 1–15, 2–12, 3–11
Holdoff knob, 1–15
horizontal
accuracy, 5–4
characteristics, 5–4
hold, 4–30
horizontal system, 1–12
humidity characteristics, 5–9, 5–11
I
input
capacitance, 5–2, 5–5
coupling, 1–8, 1–13, 5–3, 5–5
maximum voltage, 1–5, 5–2, 5–5
resistance, 5–2, 5–5
instrument
connect to, 3–20
interlaced TV system, 3–6
internal trigger, 5–5, 5–14
interval
vertical, 3–8
Inverse color palettes, 1–17
invert, 1–9, 5–3
IRE, 3–12
K
keydown powerup, 4–37
L
labels
preset configuration, 2–35
level shifts
DC, 3–16
LF reject, 2–31
line
trigger, 1–13, 5–5, 5–14
trigger (TV), 5–5, 5–14
Line softkey
Source, 1–13
TV, 2–40
Load Defaults softkey, 4–25
low frequency
reject, 2–31, 2–40, 5–5
M
main sweep, 2–3, 3–14
Main/Delayed key, 2–3, 3–14
marker, 3–14
See cursor measurements
math functions, 5–2
maximum input voltage
trigger, 5–5
vertical, 5–2
measurement
automatic, 2–16 to 2–22, 3–14
clear, 2–17
cursor, 3–12 to 3–13
custom, 2–23, 3–12
duty cycle, 2–16 to 2–17
fall time, 2–16, 2–18
frequency, 2–14 to 2–15, 2–17, 3–15
period, 2–16 to 2–17
phase, 2–36 to 2–38
rise time, 2–16, 2–18
show, 2–15, 2–17
time, 2–16 to 2–18
width, 2–16
windowed, 3–16
measurements
preset configuration, 2–35
memory
preset configuration, 2–35
Mode key, 1–14
Monochrome palette, 1–17
multi-burst, 3–15
multi-burst frequencies, 3–14
N
narrow pulses, 2–10 to 2–11
negative time, 1–12
Next Menu softkey, 2–15, 2–17, 2–20
noise
asynchronous signal, 2–28 to 2–29
noisy signals
to remove from display, 2–30 to 2–32
to view, 2–28, 2–30 to 2–32
non-interlaced TV system, 3–6
nonvolatile memory, 2–33
Normal softkey, 1–14
NTSC, 3–4, 3–6, 3–10 to 3–11
Index
O
odd field, 3–10 to 3–11
offset
adjusting option 005, 4–31
Option 005, 3–2
characteristics, 5–13
offset adjustment, 4–31
replacing circuit board, 4–56
trigger system characteristics, 5–14
triggering, 3–5
troubleshooting, 4–45
verify vertical output, 4–18
oscilloscope
configuration preset, 2–35
preset configuration, 2–35
oscilloscope maintenance, 4–5 to 4–18
output
vertical, 3–20
outputs
rear panel, 3–20
P
PAL, PAL-M, 3–4, 3–6, 3–11
palettes,color, 1–18 to 1–19
Peak Det softkey, 2–10
peak detect, 2–10
peak to peak voltage, 2–20
performance
tests, 4–5 to 4–18
verification, 4–5 to 4–18
performance characteristics
horizontal, 5–4
posttrigger, 5–4
pretrigger delay, 5–4
vertical, 5–2 to 5–3
period measurements, 2–16 to 2–17
phase measurement, 2–36 to 2–38
Plot
See User’s Guide for optional interface
module
Polarity softkey, 2–40
Position knob, 1–8
Power requirements, 5–8
power supply
to adjust, 4–22 to 4–23
voltage measurements, 4–23
preset configuration, 2–35
Previous Menu softkey, 2–18
Print
See User’s Guide for optional interface
module
printing, 1–20
probe
automatic sensing, 1–5
compensation, 1–6
connection, 1–5
trimmer capacitor, 1–6
Probe softkey, 1–6
pulse
measurements, 2–16 to 2–18
sync, 3–7
pulse parameters
See time measurements
pulse width, 2–18
R
rear panel outputs, 3–20
rearming trigger, 2–8
Recall Setup softkey, 2–33
recall waveforms, 2–33
replaceable parts list, 4–65
replacement
list, 4–61, 4–65
parts, 4–57
reset setup, 2–35
reset the instrument, 2–35
rise time measurement, 2–16, 2–18
Rise Time softkey, 2–18
Roll
mode, 1–16
softkey, 1–16
Run, 2–7 to 2–8
S
sample rate, 5–7
save
setups, 2–34
waveforms, 2–33
Save to softkey, 2–33
SECAM, 3–4, 3–6, 3–11
self-calibrations, 4–25 to 4–26
self-test, 4–42
settings
default configuration, 2–35
setup
default, 2–35
reset, 2–35
saving, 2–34
Show Meas softkey, 2–15, 2–17
signal
automatic display, 1–7
dc component, 1–8
noise, 2–28, 2–32
single
event, 2–8 to 2–9
trigger, 2–8 to 2–9
single shot
bandwidth, 2–9
event, 2–9
Single softkey, 2–8
Slope/Coupling key, 2–8
softkey, 1–2
See keys listed by name
Source softkey, 1–14, 2–14, 2–17, 2–20
specifications
See characteristics
status line, 1–2, 3–2, 3–14
Stop key, 2–7, 2–9
storage operation, 2–6 to 2–7
sub bright, 4–29
subtract waveforms, 5–2
sweep
delayed, 1–11 to 1–12, 3–14, 3–17, 5–4
main, 1–11 to 1–12, 3–14, 5–4
roll, 1–16
speed, 1–11 to 1–12, 5–4
sync
amplitude, 3–5
burst color, 3–7
pulse vertical, 3–6
pulses, 3–7
sync pulse, 3–15
T
temperature
characteristics, 5–9, 5–11
warm up, 4–5, 4–21
test
vertical interval signal, 3–5
test record, 4–19
threshold
preset configuration, 2–35
Index-3
Index
time
negative, 1–12
time base
accuracy, 5–4
preset configuration, 2–35
range, 1–11, 5–4
setup, 1–11 to 1–12
time cursor, 3–12
time domain, 3–18 to 3–19
Time key, 2–14
time measurements
duty cycle, 2–16 to 2–18
fall time, 2–16 to 2–18
frequency, 2–16 to 2–18
period, 2–16 to 2–18
rise time, 2–16 to 2–18
width, 2–16 to 2–18
time reference, 2–4
Time/Div, 2–3, 3–14
trace
memory, 2–33
recall, 2–33
softkey, 2–33
to save, 2–33
Trace Mem softkey, 2–33
trigger
characteristics, 5–5, 5–14
complex waveforms, 2–12
external, 5–5, 5–14
holdoff, 1–15, 2–12
internal, 5–5, 5–14
level, 1–13, 2–8
loss of, 1–14
maximum input voltage, 5–5
mode, 1–14 to 1–15
point, 1–12
posttrigger information, 1–12
preset configuration, 2–35
pretrigger information, 1–12
rearming, 2–8
roll, 1–16
single, 2–8 to 2–9
slope, 2–8
source, 1–13, 1–15, 2–8, 3–20
to verify, 4–15
TV, 1–14, 2–40, 2–42, 3–16
TV mode, 2–40
troubleshooting the oscilloscope, 4–9
Index-4
TV
display grid, 3–4
grid, 3–12
trigger, 1–14, 2–40, 2–42, 3–16
trigger mode, 2–40
trigger-both fields, 2–42
vertical sync, 2–42
TV graticule, 3–12, 3–14
TV softkeys, 1–14
U
undo Autoscale, 1–7, 2–35, 3–4
using color, 1–17
V
verifying Vertical Output, 4–18
vernier
accuracy, 5–3
horizontal, 5–4
vertical, 1–9
Vernier softkey, 1–9
Vert Rej, 3–7
vertical
calibration, 4–26
characteristics, 5–2 to 5–3
expand signal, 1–10
interval, 3–7 to 3–8
interval reject, 3–7
interval test signal (VITS), 3–5, 3–16 to
3–17
linearity, 4–30
reject, 3–7
scaling, 1–9
sensitivity, 1–9
size, 4–30
step size, 1–9
sync, 2–42
sync interval, 3–8
window, 1–8 to 1–9
Vertical Out, 4–18
vertical output, 3–20
Vertical softkey, 4–26
Vertical Sync, 3–10
video
autoscale, 3–4, 3–16
signal, 3–4
signal components, 3–8
signal envelope, 3–10
signal unclamped, 3–16
trigger, 2–40, 2–42, 3–16
waveforms, 2–40 to 2–41, 3–16 to 3–17
video autoscale, 3–12
VITS, 2–40
voltage
adjustment, 4–22
maximum input, 1–5, 5–2, 5–5
measurement accuracy, 4–8
measurements, 2–19 to 2–22
peak to peak, 2–20
Vavg, 2–20
Vbase, 2–22
vernier, 1–9
Vmax, 2–22
Vmin, 2–22
Vrms, 2–20 to 2–21
Vtop, 2–22
voltage cursor, 3–12
volts versus time, 2–36
volts versus volts, 2–36
Volts/Div knob, 1–9
W
waveform
complex, 2–12
saving, 2–33
width, 2–16, 2–18
X
XY
characteristics, 5–6
cursors, 2–36 to 2–39
display mode, 2–36 to 2–39
measurements, 2–38
XY softkey, 2–36
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Agilent Technologies
Manufacturer’s Address:
Colorado Springs Division
1900 Garden of the Gods Road
Colorado Springs, CO 80907 USA
declares, that the product
Product Name:
Digitizing Oscilloscope
Model Number(s):
54615B, 54616B, and 54616C
Product Option(s):
All
conforms to the following Product Specifications:
Safety:
IEC 1010-1:1990+A1 / EN 61010-1:1993
UL 3111
CSA-C22.2 No. 1010.1:1993
EMC:
CISPR 11:1990 / EN 55011:1991
Group 1 Class A
IEC 555-2:1982 + A1:1985 / EN 60555-2:1987
IEC 555-3:1982 + A1:1990 / EN 60555-3:1987 + A1:1991
IEC 801-2:1991 / EN 50082-1:1992
4 kV CD, 8 kV AD
IEC 801-3:1984 / EN 50082-1:1992
3 V/m, {1kHz 80% AM, 27-1000 MHz}
IEC 801-4:1988 / EN 50082-1:1992
0.5 kV Sig. Lines, 1 kV Power Lines
Supplementary Information:
The product herewith complies with the requirements of the Low Voltage Directive 73/23/EEC and
the EMC Directive 89/336/EEC and carries the CE marking accordingly.
This product was tested in a typical configuration with Agilent Technologies test systems.
Colorado Springs, 04/25/96
John Strathman, Quality Manager
European Contact: Your local Agilent Technologies Sales and Service Office or Agilent Technologies GmbH, Department ZQ /
Standards Europe, Herrenberger Strasse 130, D-71034 Böblingen Germany (FAX: +49-7031-14-3143)
.
© Copyright Agilent
Technologies 1993-1996, 2000
All Rights Reserved.
Reproduction, adaptation, or
translation without prior
written permission is
prohibited, except as allowed
under the copyright laws.
Document Warranty
The information contained in
this document is subject to
change without notice.
Agilent Technologies
makes no warranty of any
kind with regard to this
material, including, but
not limited to, the implied
warranties of
merchantability or fitness
for a particular purpose.
Agilent Technologies shall
not be liable for errors
contained herein or for
damages in connection with
the furnishing, performance,
or use of this material.
Safety
This apparatus has been
designed and tested in
accordance with IEC
Publication 1010, Safety
Requirements for Measuring
Apparatus, and has been
supplied in a safe condition.
This is a Safety Class I
instrument (provided with
terminal for protective
earthing). Before applying
power, verify that the correct
safety precautions are taken
(see the following warnings).
In addition, note the external
markings on the instrument
that are described under
"Safety Symbols."
Warning
• Before turning on the
instrument, you must connect
the protective earth terminal
of the instrument to the
protective conductor of the
(mains) power cord. The
mains plug shall only be
inserted in a socket outlet
provided with a protective
earth contact. You must not
negate the protective action
by using an extension cord
(power cable) without a
protective conductor
(grounding). Grounding one
conductor of a two-conductor
outlet is not sufficient
protection.
• Only fuses with the
required rated current,
voltage, and specified type
(normal blow, time delay,
etc.) should be used. Do not
use repaired fuses or
short-circuited fuseholders.
To do so could cause a shock
or fire hazard.
Agilent Technologies
P.O. Box 2197
1900 Garden of the Gods Road
Colorado Springs, CO 80901
• Service instructions are for
trained service personnel. To
avoid dangerous electric
shock, do not perform any
service unless qualified to do
so. Do not attempt internal
service or adjustment unless
another person, capable of
rendering first aid and
resuscitation, is present.
• If you energize this
instrument by an auto
transformer (for voltage
reduction), make sure the
common terminal is
connected to the earth
terminal of the power source.
Safety Symbols
Instruction manual symbol:
the product is marked with
this symbol when it is
necessary for you to refer to
the instruction manual in
order to protect against
damage to the product.
Hazardous voltage symbol.
• Whenever it is likely that
the ground protection is
impaired, you must make the
instrument inoperative and
secure it against any
unintended operation.
• Do not operate the
instrument in the presence of
flammable gasses or fumes.
Operation of any electrical
instrument in such an
environment constitutes a
definite safety hazard.
• Do not install substitute
parts or perform any
unauthorized modification to
the instrument.
• Capacitors inside the
instrument may retain a
charge even if the instrument
is disconnected from its
source of supply.
• Use caution when exposing
or handling the CRT.
Handling or replacing the
CRT shall be done only by
qualified maintenance
personnel.
Earth terminal symbol: Used
to indicate a circuit common
connected to grounded
chassis.
WARNING
The Warning sign denotes a
hazard. It calls attention to a
procedure, practice, or the
like, which, if not correctly
performed or adhered to,
could result in personal
injury. Do not proceed
beyond a Warning sign until
the indicated conditions are
fully understood and met.
CA UTIO N
The Caution sign denotes a
hazard. It calls attention to
an operating procedure,
practice, or the like, which, if
not correctly performed or
adhered to, could result in
damage to or destruction of
part or all of the product. Do
not proceed beyond a
Caution symbol until the
indicated conditions are fully
understood or met.
Product Warranty
This Agilent Technologies
product has a warranty
against defects in material
and workmanship for a period
of three years from date of
shipment. During the
warranty period, Agilent
Technologies will, at its
option, either repair or
replace products that prove
to be defective.
For warranty service or
repair, this product must be
returned to a service facility
designated by Agilent
Technologies.
For products returned to
Agilent Technologies for
warranty service, the Buyer
shall prepay shipping charges
to Agilent Technologies and
Agilent Technologies shall
pay shipping charges to
return the product to the
Buyer. However, the Buyer
shall pay all shipping charges,
duties, and taxes for products
returned to Agilent
Technologies from another
country.
Agilent Technologies
warrants that its software and
firmware designated by
Agilent Technologies for use
with an instrument will
execute its programming
instructions when properly
installed on that instrument.
Agilent Technologies does
not warrant that the
operation of the instrument
software, or firmware will be
uninterrupted or error free.
Limitation of Warranty
The foregoing warranty shall
not apply to defects resulting
from improper or inadequate
maintenance by the Buyer,
Buyer-supplied software or
interfacing, unauthorized
modification or misuse,
operation outside of the
environmental specifications
for the product, or improper
site preparation or
maintenance.
No other warranty is
expressed or implied.
Agilent Technologies
specifically disclaims the
implied warranties of
merchantability or fitness
for a particular purpose.
Exclusive Remedies
The remedies provided herein
are the buyer’s sole and
exclusive remedies. Agilent
Technologies shall not be
liable for any direct, indirect,
special, incidental, or
consequential damages,
whether based on contract,
tort, or any other legal theory.
Assistance
Product maintenance
agreements and other
customer assistance
agreements are available for
Agilent Technologies
products.
For any assistance, contact
your nearest Agilent
Technologies Sales Office.
Certification
Agilent Technologies certifies
that this product met its
published specifications at
the time of shipment from the
factory. Agilent Technologies
further certifies that its
calibration measurements are
traceable to the United States
National Institute of
Standards and Technology, to
the extent allowed by the
Institute’s calibration facility,
and to the calibration
facilities of other
International Standards
Organization members.
About this edition
This is the Agilent 54615B,
54616B, and 54616C
Oscilloscope User and
Service Guide.
Publication number
54615-97019, June 2000
Print history is as follows:
54615-97009, July 1996
54615-97008, February 1996
54615-97000, October 1995
Printed in USA.
New editions are complete
revisions of the manual.
Update packages, which are
issued between editions,
contain additional and
replacement pages to be
merged into the manual by
you. The dates on the title
page change only when a new
edition is published.