AFG31000 Series Arbitrary Function Generator
Service Manual
tek.com
077179600
Copyright © Tektronix. All rights reserved. Licensed software products are owned by
Tektronix or its subsidiaries or suppliers and are protected by national copyright laws and
international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued, and pending. Information
in this publication supersedes that in all previously published material. Specifications and
price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix, Inc.
Tektronix, Inc.
14150 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
- In North America, call 1-800-833-9200.
t
- Worldwide, visit tek.com
o find contacts in your area.
Warranty
Tektronix warrants that the product will be free from defects in materials and workmanship for a period of
three (3) years from the date of original purchase from an authorized Tektronix distributor. If the product
proves defective during this warranty period, Tektronix, at its option, either will repair the defective product
without charge for parts and labor or will provide a replacement in exchange for the defective product.
Batteries are excluded from this warranty. Parts, modules, and replacement products used by Tektronix
for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and
products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the
expiration of the warranty period and make suitable arrangements for the performance of service.
Customer shall be responsible for packaging and shipping the defective product to the service center
designated by Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase.
Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the
country in which the Tektronix service center is located. Customer shall be responsible for paying all
shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or
inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty
a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install,
repair or service the product; b) to repair damage resulting from improper use or connection to
incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix
supplies; or d) to service a product that has been modified or integrated with other products when the
effect of such modification or integration increases the time or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE
AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR
HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
[W16 – 15AUG04]
AFG31000 Series Arbitrary Function Generator Service Manual
Table of Contents
Important safety information ................................................................................................... 6
Important safety information ................................................................................................................. 6
General safety summary ....................................................................................................................... 6
To avoid fire or personal injury .................................................................................................................... 6
Terms in this manual ............................................................................................................................. 8
Service safety summary ........................................................................................................................ 8
Symbols and terms on the product ....................................................................................................... 9
Service introduction ............................................................................................................... 10
Getting started ..................................................................................................................................... 10
Contact information ............................................................................................................................. 10
General model information .................................................................................................................. 10
AFG31000 Series documentation ....................................................................................................... 10
Strategy for servicing .......................................................................................................................... 12
Performance verification procedures .................................................................................................. 12
Extended warranty .............................................................................................................................. 12
Operating basics ..................................................................................................................... 13
Operating requirements ...................................................................................................................... 13
Check and protect connectors ............................................................................................................ 13
Floating ground ................................................................................................................................... 15
Front-panel overview ........................................................................................................................... 16
Power the instrument .......................................................................................................................... 17
Touchscreen interface......................................................................................................................... 18
Protect your DUT ................................................................................................................................ 19
Perform diagnostics and calibration .................................................................................................... 20
Protection from overheating ................................................................................................................ 22
Theory of operation ................................................................................................................ 23
Overview ............................................................................................................................................. 24
Platform section .................................................................................................................................. 26
Generator section ................................................................................................................................ 25
Adjustment procedures .......................................................................................................... 26
Adjustment procedures ....................................................................................................................... 26
iv
Table of Contents
AFG31000 Series Arbitrary Function Generator Service Manual
Purpose ..................................................................................................................................................... 26
Equipment required ................................................................................................................................... 27
Performance conditions ............................................................................................................................ 27
Enable Service mode ................................................................................................................................ 28
Save Cal.................................................................................................................................................... 28
CAL Clear.................................................................................................................................................. 28
Reference clock ........................................................................................................................................ 28
Flatness adjustment .................................................................................................................................. 29
Trigger delay adjustment ........................................................................................................................... 30
Burst external trigger adjustment .............................................................................................................. 33
Delay IC adjustment .................................................................................................................................. 36
Resetting the serial number ...................................................................................................................... 38
Resetting the MAC address ...................................................................................................................... 38
Maintenance ............................................................................................................................ 39
Maintenance ........................................................................................................................................ 39
Service preparation ................................................................................................................................... 39
Preventing ESD ......................................................................................................................................... 39
Preventative maintenance ......................................................................................................................... 39
Inspection and cleaning ............................................................................................................................ 40
Removal and installation ........................................................................................................ 43
Removal and installation procedures .................................................................................................. 43
After repair adjustments ............................................................................................................................ 43
Before disassembly ................................................................................................................................... 43
Equipment required for disassembly ......................................................................................................... 43
Order of instrument disassembly ............................................................................................................... 44
Module rear case removal and installation ................................................................................................ 44
Module rear chassis upper removal and installation ................................................................................. 46
Module rear chassis bottom removal and installation ................................................................................ 47
Module front chassis removal and installation ........................................................................................... 49
Front-panel board: Power button, keypad, and LCD module removal and installation .............................. 50
BNC insulator board and signal generator board removal and installation ................................................ 51
CPU board and power receptacle removal and installation ....................................................................... 53
Power supply and fan removal and installation ......................................................................................... 55
Diagrams ................................................................................................................................................... 59
Replaceable parts and modules ................................................................................................................ 57
Troubleshooting ..................................................................................................................... 78
Troubleshooting .................................................................................................................................. 78
Troubleshooting tools and equipment ....................................................................................................... 78
Troubleshooting trees ............................................................................................................................... 78
Diagnostics................................................................................................................................................ 81
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AFG31000 Series Arbitrary Function Generator Service Manual
Important safety information
Important safety information
This manual contains information and warnings that must be followed by the user for safe operation
and to keep the product in a safe condition.
To safely perform service on this product, additional information is provided at the end of this section.
See Service safety summary.
General safety summary
Use the product only as specified. Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it. Carefully read all instructions. Retain these
instructions for future reference.
Comply with local and national safety codes.
For correct and safe operation of the product, it is essential that you follow generally accepted safety
procedures in addition to the safety precautions specified in this manual.
The product is designed to be used by trained personnel only.
Only qualified personnel who are aware of the hazards involved should remove the cover for repair,
maintenance, or adjustment.
Before use, always check the product with a known source to be sure it is operating correctly.
This product is not intended for detection of hazardous voltages.
Use personal protective equipment to prevent shock and arc blast injury where hazardous live
conductors are exposed.
While using this product, you may need to access other parts of a larger system. Read the safety
sections of the other component manuals for warnings and cautions related to operating the system.
When incorporating this equipment into a system, the safety of that system is the responsibility of the
assembler of the system.
To avoid fire or personal injury
Use proper power cord. Use only the power cord specified for this product and certified for the
country of use. Do not use the provided power cord for other products.
Use proper voltage setting. Before applying power, make sure that the line selector is in the proper
position for the source being used or make sure the line voltage is corrected based on the published
specifications.
Ground the product. This product is grounded through the grounding conductor of the power cord.
To avoid electric shock, the grounding conductor must be connected to earth ground. Before making
connections to the input or output terminals of the product, make sure that the product is properly
grounded.
vi
Important safety information
AFG31000 Series Arbitrary Function Generator Service Manual
Do not disable the power cord grounding connection.
Power disconnect. The power cord disconnects the product from the power source. See instructions
for the location. Do not position the equipment so that it is difficult to operate the power cord; it must
remain accessible to the user at all times to allow for quick disconnection if needed.
Connect and disconnect properly. Do not connect or disconnect instruments while is connected to
a voltage source and. the instrument is powered on. Use only connectors and adapters supplied with
the product or indicated by Tektronix to be suitable for the product.
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings and markings on the
product. Consult the product manual for further ratings information before making connections to the
product. Do not exceed the Measurement Category (CAT) rating and voltage or current rating of the
lowest rated individual component.
Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum
rating of that terminal.
Do not float the common terminal above the rated voltage for that terminal.
Do not operate without covers. Do not operate this product with covers or panels removed, or with
the case open. Hazardous voltage exposure is possible.
Avoid exposed circuitry. Do not touch exposed connections and components when power is
present.
Do not operate with suspected failures. If you suspect that there is damage to this product, have it
inspected by qualified service personnel before using this product.
Disable the product if it is damaged. Do not use the product if it is damaged or operates incorrectly. If
in doubt about the safety of the product, turn it off and disconnect the power cord. Clearly mark the
product to prevent its further operation.
Examine the exterior of the product before you use it. Look for cracks or missing pieces.
Use only specified replacement parts.
Wear eye protection. Wear eye protection if exposure to high-intensity rays or laser radiation exists.
Do not operate in wet or damp conditions. Be aware that condensation may occur if a unit is
moved from a cold environment to a warm environment.
Do not operate in an explosive atmosphere.
Provide proper ventilation. Refer to the installation instructions in the manual for details on installing
the product so it has proper ventilation.
Slots and openings are provided for ventilation and should never be covered or otherwise obstructed.
Do not push objects into any of the openings.
Provide a safe working environment. Always place the product in a location convenient for viewing
the display and indicators.
vii
Important safety information
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. Avoid getting moisture inside the unit during external
agents.
WARNING. Warning statements identify conditions or practices that
CAUTION. Caution statements identify conditions or practices that
Avoid improper or prolonged use of keyboards, pointers, and button pads. Improper or prolonged
keyboard or pointer use may result in serious injury.
Be sure your work area meets applicable ergonomic standards. Consult with an ergonomics
professional to avoid stress injuries.
Use care when lifting and carrying the product. This product is provided with handles for lifting and
carrying.
Use only the Tektronix rack-mount hardware specified for this product.
Keep product surfaces clean and dry. Remove the input signals before you clean the product.
Inspect the instrument as often as operating conditions require. To clean the exterior surface, perform
the following steps:
1. Remove loose dust on the outside of the instrument with a lint-free cloth. Use care to avoid
scratching the clear glass display filter.
2. Use a soft cloth dampened with water to clean the instrument. Use an aqueous solution of 75%
isopropyl alcohol for more efficient cleaning.
cleaning. Use only enough cleaning solution to dampen the cloth or
swab. To avoid damage to the instrument, do not expose it to sprays,
liquids, or solvents, and do not use any abrasive or chemical cleaning
Terms in this manual
These terms may appear in this manual:
could result in injury or loss of life.
could result in damage to this product or other property.
Service safety summary
This section contains additional information required to safely perform service on the product. Only
qualified personnel should perform service procedures. Read this Service safety summary and the
General safety summary before performing any service procedures.
To avoid electric shock. Do not touch exposed connections.
Do not service alone. Do not perform internal service or adjustments of this product unless another
person capable of rendering first aid and resuscitation is present.
iix
Important safety information
AFG31000 Series Arbitrary Function Generator Service Manual
When this symbol is marked on the product, be sure to
the user to ratings in the manual.)
Disconnect power. To avoid electric shock, switch off the product power and disconnect the power
cord from the mains power before removing any covers or panels, or opening the case for servicing.
Use care when servicing with power on. Dangerous voltages or currents may exist in this product.
Disconnect power, remove battery (if applicable), and disconnect test leads before removing
protective panels, soldering, or replacing components.
Verify safety after repair. Always recheck ground continuity and mains dielectric strength after
performing a repair.
Symbols and terms on the product
These terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the marking.
WARNING indicates an injury hazard not immediately accessible as you read the marking.
CAUTION indicates a hazard to property including the product.
consult the manual to find out the nature of the
potential hazards and any actions which must be taken
to avoid them. (This symbol may also be used to refer
The following symbol(s) may appear on the product:
ix
AFG31000 Series Arbitrary Function Generator Service Manual
AFG31021
25 MHz
250 MS/s
1
16 MS/CH
128 MS/CH
AFG31022
25 MHz
250 MS/s
2
16 MS/CH
128 MS/CH
AFG31051
50 MHz
1 GS/s
1
16 MS/CH
128 MS/CH
AFG31052
50 MHz
1 GS/s
2
16 MS/CH
128 MS/CH
AFG31101
100 MHz
1 GS/s
1
16 MS/CH
128 MS/CH
AFG31102
100 MHz
1 GS/s
2
16 MS/CH
128 MS/CH
AFG31151
150 MHz
2 GS/s
1
16 MS/CH
128 MS/CH
AFG31152
150 MHz
2 GS/s
2
16 MS/CH
128 MS/CH
AFG31251
250 MHz
2 GS/s
1
16 MS/CH
128 MS/CH
AFG31252
250 MHz
2 GS/s
2
16 MS/CH
128 MS/CH
Service introduction
Getting started
Thank you for choosing a Tektronix product. The AFG31000 Series Arbitrary Function Generator
(AFG) instruments are high-performance instruments with built-in waveform generation applications,
real-time waveform monitoring called InstaView
efficiency.
Contact information
If you have any questions after you review the information in this documentation, please contact your
local Tektronix office, sales partner, or distributor. You can also call the corporate headquarters of
Tektronix in North America at 1-800-833-9200. Visit tek.com
General model information
This manual provides operation information for the following products. Unless otherwise noted,
AFG31000 Series refers to the models in the following table.
Table 1: AFG31000 models
TM
, and an improved user interface for higher test
to find contacts in your area.
Model Bandwidth Sample rate Channel Waveform
memory size
Optional
Each AFG31000 Series provides:
25 MHz to 250 MHz function signal generator
20 MHz to 160 MHz pulse generator
The AFG31000 Series also provides 14-bit vertical resolution.
AFG31000 Series documentation
Complete documentation for the instruments is available at tek.com. The following table is a complete
list of available documentation.
10
Service introduction
AFG31000 Series Arbitrary Function Generator Service Manual
Instructions
English
0713606xx
This document contains compliance
French
0713613xx
German
0713615xx
Italian
0713614xx
Japanese
0713617xx
Korean
0713621xx
Portuguese
0713618xx
Russian
0713622xx
Simplified Chinese
0713619xx
Spanish
0713616xx
Traditional Chinese
0713620xx
AFG31000 Series
English
0771473xx
This document describes operation
Japanese
0771478xx
Simplified Chinese
0771479xx
Traditional Chinese
0771480xx
German
0771481xx
French
0771482xx
Russian
0771486xx
Korean
0771487xx
AFG31000 Series
Manual
English
0771488xx
This document provides information
Generator.
AFG31000 Series
Technical Reference
English
0771489xx
This document describes
AFG31000 Series
Security Instructions
English
0771491xx
This document includes information
returning the product for repair.
Series 31000
English
0771492xx
This online help provides information
oscilloscope.
AFG31000 Series
Notes
English
0771493xx
Release notes
Table 2: AFG31000 documentation
Document name Available languages Document number Document description
Compliance and
Safety Instructions
Arbitrary Function
Generator User's
Manual
Arbitrary Function
Generator
Programmer's
and safety information for the
AFG31000 Series Arbitrary Function
Generator.
and installation procedures for all
models of the AFG31000 Series
Arbitrary Function Generator. It
includes information about features,
functions, and accessories.
required to use programmable
interface commands for the
AFG31000 Series Arbitrary Function
Arbitrary Function
Generator
Specification and
Performance
Verification
Arbitrary Function
Generator
Declassification &
ArbExpress
Printable Help
11
Arbitrary Function
Generator Release
NOTE: XX in a part number replaces the document revision number.
specifications and performance
verification procedures for the
AFG31000 Series Arbitrary Function
Generator.
that is necessary to clear or sanitize
the product so it can be removed
from a secured area, such as when
on how to create, edit, and transfer
standard waveforms to an arbitrary
waveform generator, an arbitrary
function generator, or an
Service introduction
AFG31000 Series Arbitrary Function Generator Service Manual
Strategy for servicing
This manual contains information for periodic maintenance of your arbitrary function generator.
Further, it contains information for corrective maintenance down to the module level:
To isolate a failure of a module, use the troubleshooting procedures found in the Maintenance
To remove and replace a failed module, follow the instructions in the Removal and installation
After isolating a faulty module, replace it with a fully-tested module obtained from the factory.
Performance verification procedures
The performance verification procedures are provided in the AFG31000 Series Specifications and
Performance Verification Technical Reference and should be performed every 12 months.
If the instrument does not meet the performance criteria, repair is necessary (refer to Contact
information for information regarding how to contact the appropriate personnel).
section.
procedures section.
The Replaceable parts and modules list section contains part numbers and ordering
information for all replaceable modules.
Extended warranty
Additional years of warranty coverage are available on many products. These valuable contracts
protect you from unbudgeted service expenses and provide additional years of protection at a fraction
of the price of a repair. Extended warranties are available on new and existing products. Contact your
local Tektronix office, sales partner, or distributor for details (refer to Contact information for details).
12
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. To make sure that the instrument has the appropriate cooling, keep both sides of the
WARNING. To reduce the risk of fire and shock that may cause personal injury or death, make sure
Operating basics
Operating requirements
Use the following information to safely install your instrument.
To operate your instrument:
1. Place the instrument on a cart or bench, observing clearance requirements of 50 mm (2 in.) from
the sides and rear.
2. Before operating, make sure that the ambient temperature is between 0 °C to +50 °C (+32 °F to
+122 °F).
instrument clear of obstructions.
Check and protect connectors
The source voltage and frequency should be between 100 V to 240 V and 47 Hz to 63 Hz.
The instrument will also support 115V, 360-440Hz.
that the mains supply voltage fluctuations do not exceed 10% of the operating voltage range.
To check input and output connectors:
1. Locate the output connectors on the front panel.
2. Locate the input connectors on the front panel.
NOTE: When connecting a cable, make sure to distinguish the input connector from the output
connectors to avoid making the wrong connection.
13
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
WARNING. To avoid personal injury or death due to electric shock, do not apply voltages in excess
CAUTION. Do not short output pins or apply external voltages to output connectors, because this
connector, which may cause damage to your instrument.
Figure 1: AFG31000 Series front-panel inputs and outputs
The instrument input and output connectors are floating inputs and outputs (see Floating ground for
more information).
of 42 Vpk to any BNC connector ground or to the chassis ground.
will cause damage to your instrument. Also, do not apply more than +5 V to the Trigger Input
14
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
WARNING. To avoid personal injury due to electric shock, use this product so that the sum of the
center of the BNC connector while the equipment and instrument are in use.
CAUTION. The maximum rated voltage between the chassis ground and common ground is 42 Vpp
excessive current flow and the internal or external circuits may be damaged.
Floating ground
Because the common ground (input and output channel common) of the AFG31000 Series is
electrically isolated from the chassis ground (the instrument chassis and ground line of the ac
connector), you can make a floating connection between the instrument and other equipment.
All the signal output connectors are connected to the common ground, and the remote interface
connector is connected to the chassis ground.
floating voltage and the output voltage of the instrument does not exceed 42 Vpk. Do not touch the
(dc + peak ac). When the potential voltage between the chassis ground and common ground goes
over 42 V
continuously exceeding 42 V
When a potential voltage exists between the chassis ground and common ground, a short circuit
from output to ground causes the instrument internal fuse to open and the output is stopped. If the
fuse opens, you need to contact your local Tektronix Service Support. When a potential voltage
exists between the common ground and chassis ground, short-circuiting between them may lead to
, the internal protective circuit is activated to protect the circuits. However, voltages
pp
may cause the internal circuits in the instrument to be damaged.
pp
Figure 2: AFG31000 Series floating ground
15
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
Front-panel overview
The following figure shows the front panel of a dual-channel model.
Figure 3: AFG31000 Series front-panel overview
1. Power switch
2. Touchscreen
3. Shortcut buttons: Frequency/Period, Amplitude/High, Phase/Delay, Offset/Low
4. Waveform function keys: Sine, Ramp, Arb, Square, Pulse, and More
5. Basic Mode buttons: Continuous, Sweep, Modulation, and Burst
6. Advanced Mode keys: Sample, Rate, and Run
7. Setup buttons: Default, Save/Recall, Touch Off, Utility, and Help
8. InstaView (real-time waveform measurement) button
9. Navigation area: Navigation control (turn the control to change the number of parameter that is
selected); Home key (takes you to the initial power on screen); Back key (use to switch between
AFG, Advanced Mode, ArbBuilder, Help, and Utility); left and right arrow keys (when editing a
setting, moves the cursor to the left or the right)
10. Cancel, Bksp (backspace), Delete, and Enter buttons (use with the numeric keypad)
11. Settings edit buttons: G/n, M/μ, k/m, and x1 buttons (use when editing a setting)
12. Numeric keypad
13. Trigger button, LEDs, and connectors
14. Channel buttons and connectors
15. USB input (Type A connector)
16
NOTE: Shortcut keys are provided for advanced users. The shortcut keys allow you to select a setting
and enter a numeric value using the front-panel controls or the touchscreen.
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
Power the instrument
The following procedure shows you how to connect the instrument to power and turn it on and off.
Connect the power cord:
1. Make sure the front-panel power switch is in the off position.
2. Connect the female end of the supplied power cord to the ac receptacle on the rear panel.
3. Connect the male end of the power cord to a grounded ac outlet.
To power on the instrument:
Press the front-panel power switch to turn on the instrument.
Figure 4: AFG31000 Series two-channel front view
NOTE: Wait until the front-panel
before using the instrument.
display shows that the instrument has passed all power-on self-tests
17
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
Touchscreen interface
The following figures describe the touchscreen main display.
Figure 5: Touchscreen main display
18
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
Protect your DUT
Use caution when you connect the instrument channel output to your device under test (DUT). To
avoid damage to your DUT, follow the steps below to set the limit values for high level and low level.
To protect your DUT:
1. Make note of the CH1 or CH2 high voltage and low voltage.
2. Swipe the bottom area up and select Ch1 or Ch2.
3. Make sure that the limits are set appropriately for the device under test (DUT).
Default high limit: 500 mV
Default low limit: –500 mV
Figure 6: High and low voltage limits
19
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
Perform diagnostics and calibration
When powering on the instrument, it performs a limited set of hardware tests. You can also run the
following manual diagnostic and calibration functions from the Utility menu (see Utility menu options
for more detail). This procedure uses internal routines to verify that the instrument is operating
correctly.
Diagnostics (self-test): Perform diagnostics to verify that your instrument is operating
correctly.
Calibration (self-calibration): The calibration function checks dc accuracy using the internal
calibration routines.
Figure 7: Diagnostics and calibration
20
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. Do not remove power from the instrument while performing calibration. If the power is
NOTE: If you need to verify that the instrument meets the warranted specifications, do the complete set
of performance verification procedures provided in the Specifications and Performance Verification
Manual.
To perform diagnostics and calibration:
turned off during calibration, data stored in the internal memory may be lost.
NOTE: Disconnect all cables from the instrument when you perform diagnostics or calibration (do not
remove the power cord).
1. Select Utility on the touchscreen.
2. Select Diagnostics/Calibration in the menu.
3. To perform diagnostics, select Run.
4. Select OK to perform diagnostics or Cancel to exit.
Figure 8: Run system diagnostics
5. Wait until the test is completed. The diagnostics test takes eight minutes to complete.
6. To perform calibration, select Run.
21
Operating basics
AFG31000 Series Arbitrary Function Generator Service Manual
7. Select OK to perform calibration or Cancel to exit.
Figure 9: Run self-calibration
8. Wait until the test is completed. The diagnostics test takes eight minutes to complete.
9. Once calibration or diagnostics is executed, a dialog box displays the results including any errors.
Protection from overheating
The internal temperature of the AFG31000 Series instrument is monitored. A warning message is
displayed if the internal temperature reaches a specified level and signal output is automatically
turned off.
If the warning message appears, check for the following conditions:
The ambient temperature requirement is correct.
The required cooling clearance has been provided.
The instrument fan is working properly.
22
AFG31000 Series Arbitrary Function Generator Service Manual
Theory of operation
Overview
The AFG31000 Series instruments offer multiple models with different frequencies and channels.
Each model consists of two major sections: the platform section and the generator section. This
overview describes the electrical operation of the instruments down to the module level. It describes
the basic operation of each functional circuit block as shown in the following block diagram.
Figure 10: AFG31000 Series Theory of operation
23
Theory of operation
AFG31000 Series Arbitrary Function Generator Service Manual
Primary circuit
Contains the power switch, one ac line voltage (100~240 V ac) out
Lambda power supply.
Contains an MPU, EMMC, and SDRAM to control the instrument.
included in the MPU.
Local regulators
Stabilizes and supplies +3.3 V and +5.0 V for the logic circuit. 4.2 V
for CPU Power Management Integrated Circuit.
Remote interface
The CPU board contains a GPIB and LAN driver circuit.
SG board
interface
Use a FPGA for CPU board and SG board communication.
SG Signal I/O
circuit
The Reference Clock Input/output, the Modulation Input and Add in
signals are transmitted from SG board to this board.
Front panel board
Contains an MPU to address keypad input and transition to CPU
board response.
LCD
The display is a TFT LCD, 9.0 Inches with 800 x 480 resolution,
controlled by CPU board LCD with RGB mode.
Fan
A 92 mm by 92 mm size, dc 12 V type fan. It is driven by fan
to Fan.
Platform section
Instrument area Description
CPU circuit
communication
to Artesyn power supply and another ac line voltage (100~240 V
ac) pass rectifier and filter circuit out (120 V~370 V dc) to TDK-
The liquid crystal display controller and the USB circuit are
controller on the SG board and be transmitted to CPU board output
24
Theory of operation
AFG31000 Series Arbitrary Function Generator Service Manual
Transmits the serial control signal from the CPU board to the following
circuits with electrical insulation.
Generates a 2 GHz high-speed clock necessary for the signal
function of selecting the reference signal source as well.
The field-programmable gate array (FPGA) is the key IC to achieve
Burst and Sweep. The FPGA manages most of the generator section.
Three pieces
Stores user-defined waveform data in advance mode.
Receives an External Trigger input signal, executes the level
FPGA.
Converts the differential output signal of the DAC to single ended
through the Attenuator.
The output of the pre-amplifier is amplified and output. A low-pass filter
The Sync Out signal from the FPGA is level converted to Trigger Out.
Modulation by an external source is performed by digitally sampling the
Supplies the necessary ±15 V, ±5 V,1 V, 1.5 V, 1.8 V, 3.3 V power.
On or Off of the output signal.
DC Calibration of the output signal is done by a 24-bit AD Converter.
The output of the pre-amplifier is amplified and output. LPF is used
LPF is used when a sine wave is output.
Tek026 as the key part of InstaView circuit to provide the waveform of
Generator section
This section provides information on the components that ensure the functionality and performance of
the AFG31000 Series instruments.
Instrument area Description
Isolator
Clock circuit
FPGA
DDR
DAC
Trigger circuit
Pre-amplifier
circuit
Output amplifier
Trigger out
ADC
Local regulator
generation from a 10 MHz reference clock by PLL. This circuit has a
Direct Digital Synthesis, waveform SRAM 128 K, x8 MUX, Modulation,
* 16 bits width
* 128 M depth for each channel
14-bit 2.5 GSPS update rate digital to analog converter. Receives
digital signal from FPGA and generate corresponding analog signal.
conversion, then supplies the level converted trigger signal to the
output, then supplies the single ended output to the Output Amplifier
(LPF) is used when a sine wave is output.
external input from the Ext Modulation Input connector.
On/Off relay
Calibration circuit
Output amplifier
Output filter
InstaView circuit
when a sine wave is output.
the DUT input.
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AFG31000 Series Arbitrary Function Generator Service Manual
Adjustment procedures
Adjustment procedures
This section describes the procedures necessary to manually adjust the AFG31000 Series Arbitrary
Function Generators. Perform each adjustment when you remove and replace a circuit board.
Purpose
This procedure returns the arbitrary function generator to compliance with its warranted
characteristics as listed in the AFG31000 Series Specifications and Performance Verification
Technical Reference Manual. It can also be used to optimize the performance of the instrument.
After the removal and replacement of an SG board or CPU board due to electrical failure, perform the
adjustment procedure in this section.
NOTE: These adjustments should be performed every 12 months.
26
Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Digital multi meter
AC volts, true RMS, ac
Resistance accuracy: ± 0.05 Ω
Keithley 2002
Measures voltage; Used in
Power meter
100 kHz to 250 MHz 1 μW to
Resolution: 0.01 dB
R&S NRP2
Measures voltage; Used in
Power head
100 kHz to 250 MHz 1 μW to
dBm)
R&S NRP6A
Measures voltage; Used in
Oscilloscope
1 GHz bandwidth 50 Ω input
Tektronix
Checks output signals;
Tektronix
BNC coaxial cable
50 Ω, male to male
Tektronix part
Signal interconnection
BNC terminator
50 Ω , ±1Ω , 2 W,
Tektronix part
Signal termination
Adapter dual-
BNC (female) to dual banana
Tektronix part
Signal interconnection to a DMM
Adapter BNC(fe)-
BNC (female) to N (male)
Tektronix part
Signal interconnection to a
Equipment required
The next table lists the equipment that is required to complete the adjustment procedures.
Description Minimum requirements Recommended
equipment
(DMM)
Frequency counter 50 kHz to 5 GHz, Accuracy:
Spectrum analyzer 20 kHz to 1.25 GHz
(2 required)
coupled, Accuracy: ± 0.02% to
1 MHz, dc volts
Accuracy: 50 ppm, resolution
100 μV
100 mW (-30 dBm to +20
dBm)
Accuracy: 0.02 dB
100 mW (-30 dBm to +20
0.01ppm Phase measurement
termination
BNC connector, 91 cm
Tektronix
FCA3103
DPO7104C
RSA5103
number
012-0482-00
Purpose
multiple procedures
multiple procedures
multiple procedures
Checks clock frequency
Used in multiple procedures
Checks output signals;
Harmonics Spurious
dc to 1 GHz, BNC
banana plug
N(ma)
number
011-0049-02
number
103-0090-00
number
103-0045-00
Spectrum Analyzer
Performance conditions
The adjustments in this section are an extensive, valid confirmation of performance and functionality
when the following requirements are met:
The instrument covers must be on the AFG31000 Series.
The instrument must have been calibrated/adjusted at an ambient temperature
between +20 °C and +30 °C.
The instrument must have had a warm-up period of at least 20 minutes.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Enable Service mode
You must enable the service mode to perform the adjustment procedure. Do the following steps to
enter the service mode.
To enable Service mode
1. Push the Power button to power on the arbitrary function generator.
2. Press the front-panel number keys to input the password “62218.”
3. Press the Utility button on the front-panel.
4. Check if Service is in the last position of Utility menu on the touchscreen.
Save Cal
To adjust the Reference Clock, Flatness, and Trigger Delay parameters, select Service > Manual
Calibration.
Each parameter is stored in the memory of the arbitrary function generator after you select the Save
Cal on the Manual Calibration options.
Previous adjustment parameters will be recalled after a power cycle, unless you select the Save Cal.
CAL Clear
The Cal Clear procedure is in Service > Manual Calibration. It clears all the current adjustment
parameters and sets them to the default value. The previous adjustment parameters will be recalled
after a power cycle unless you select Save Cal.
Reference clock
This procedure adjusts the frequency accuracy of the arbitrary function generator. For any model,
only channel one of the frequency point is adjusted.
To adjust the reference clock:
1. Connect the instrument to a frequency counter using the AFG CH1 Output and the frequency
counter input using a 50 Ω BNC coaxial cable.
Figure 11: Reference clock adjustment
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Function
Sine
Sine (front)
Frequency
1.000000 MHz
Frequency/Period (front)
Amplitude
Amplitude/High (front)
Channel 1 Output
On
On (front)
Amplitude
Amplitude/High (front)
Offset
0 V
Offset/Low (front)
Channel 1 output
On
On (front)
2. Push the Default front-panel button to recall the AFG default setup.
3. Set up your arbitrary function generator as shown in the next table:
Select menu Setting Front panel operation
4. Press the Utility button.
5. Select Service > Manual Calibration > Reference Clock Cal.
6. Adjust the Ref Clock value with the rotary knob so that the frequency counter reading is between
0.999999 MHz and 1.000001 MHz.
7. Select the Save Cal to save the adjusted value.
Flatness adjustment
To obtain a flat sine wave relative to a 1 kHz sine wave, compensate the output level of the sine
waveform at a 100 kHz and 5 MHz interval with a power meter.
To obtain a flat sine wave with a 1 kHz reference:
1. Connect the arbitrary function generator to a 50 Ω terminator to a power meter with a power
head.
1.00 Vpp
29
Figure 12: Flatness adjustment
2. Set up the arbitrary function generator using the following steps:
Select menu Setting Operation
Amplitude units
V
On the touchscreen select the Basic icon > Units > VPP
PP
1.0 VPP
Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
3. Press the Utility button.
4. Select Service > Manual Calibration. Press the arrow of the spin box to set the first frequency of
the arbitrary function generator to 1 kHz.
5. Set the frequency parameter of the power meter to 1 kHz and compensate the power meter so
that the reading value at 1 kHz may become 0 dB with the frequency dependent offset function.
Then set up the power meter to the relative measurement mode.
6. Press the upwards arrow of the spin box. The setting of the next frequency of the arbitrary
function generator becomes 100 k.
7. Change the frequency of the power meter setting to 100 k (same as the arbitrary function
generator frequency).
8. The power meter shows the value difference from the reference value. Set this value to the
Flatness field of the arbitrary function generator.
9. Press the upwards arrow of the spin box. The setting of the next frequency of the arbitrary
function generator becomes 5 MHz.
10. Change the frequency of the power meter setting to 5 MHz (same as the arbitrary function
generator frequency).
11. The power meter shows the value difference from the reference value. Set this value to the
Flatness field of the arbitrary function generator.
12. Repeat steps 9 through 11 until the setting of the arbitrary function generator is: 25 MHz;
AFG3102x, 50 MHz; AFG3105x, 100 MHz; AFG3110x, 150 MHz; AFG3115x, or 250 MHz;
AFG3125x.
The frequency of the output signal of the arbitrary function generator increases 5 MHz increments
every time you push the upwards arrow of the spin box. Set the frequency of the power meter to
the same frequency of the arbitrary function generator in step 8. Pushing the downwards arrow of
the spin box decreases the output frequency of the arbitrary function generator.
13. Select the Flatness Cal Apply to enable the input data for flatness correction.
14. (AFG31xx2 only) Repeat steps 2 through 13 for the channel 2 output.
15. Select Save Cal to save the adjusted value.
Trigger delay adjustment
This procedure adjusts trigger timing of two channels.
NOTE: This adjustment is not necessary in the AFG31021, AFG31051, AFG31101, AFG31151 and
AFG31251.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Function (CH1)
Pulse
Pulse (front)
Leading (CH1)
AFG31021/31022: 8.0 ns
AFG31251/31252: 2.0 ns
Select leading (on the touchscreen)
Lead Delay (CH1)
0.00 ns
Delay (front)
Function (CH2)
Pulse
CH1/CH2 > Pulse (front)
Leading (CH2)
AFG31021/31022: 8.0 ns
AFG31251/31252: 2.0 ns
Select leading (on the touchscreen)
Lead Delay (CH2)
0.00 ns
Delay (front)
Run Mode (CH2)
Burst
Burst (front)
Trigger Delay
0.0 ns
Select TrigDelay (on the touchscreen)
Run Mode (CH2)
Continuous
Continuous (front)
Channel 1 Output
On
On (front)
Channel 2 Output
On
On (front)
To adjust the trigger timing of two channels:
1. Connect the arbitrary function generator to the oscilloscope using a 50 Ω BNC coaxial cable.
Figure 13: Trigger delay adjustment
2. Push the Default front-panel button and the OK menu button to recall the arbitrary function
generator default setup.
3. Set up the arbitrary function generator using the following steps.
Select menu Setting Operation
AFG31051/31052: 6.0 ns
AFG31101/31102: 4.0 ns
AFG31151/31152: 3.0 ns
AFG31051/31052: 6.0 ns
AFG31101/31102: 4.0 ns
AFG31151/31152: 3.0 ns
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Select option
Setting
Operation
Horizontal
200 ns/div
Sec/div knob
Vertical (CH1 and
CH2)
200 mV/div
Volts/div knob
Vertical position
Align the baseline of each
channel
CH1 and CH2 Vertical position knob
4. Set up the oscilloscope using the following steps
5. Select the Utility button. Select Service > Manual Calibration > Trigger Delay Cal.
6. Change the value of the Trigger Delay in the service menu to a value other than 0.0 ns, then
return it to 0.0 ns.
7. Press the Home button.
8. Select Basic on the touchscreen. Push the CH1/CH2 button to activate the CH1 screen.
9. Select Burst to change the CH1 Run mode to Burst mode.
10. Change the value of the Trigger Delay in the Burst menu to a value other than 0.0 ns, then return
it to 0.0 ns.
11. Select Continuous to change the CH1 Run mode to Continuous mode.
12. On the touchscreen, swipe the arrow at the bottom up, go to the InterChannel tab and select
Align Phase.
13. Change the Horizontal setting of the oscilloscope to 1 ns/div.
14. Write down the skew time of two signals from the oscilloscope screen.
15. Select Utility. Select Service > Manual Calibration > Trigger Delay Cal.
16. Set the Trigger Delay to the value written down in step 14.
17. Select Save Cal.
18. Press Home. Select Basic. Press the CH1/CH2 button to activate the CH1 screen. Press Burst
to change the CH1 Run mode to Burst mode.
19. Change the value of the Trigger Delay in the Burst menu to a value other than 0.0 ns, then return
it to 0.0 ns.
20. Select Continuous to change the CH1 Run mode to Continuous mode.
21. Swipe the arrow at the bottom of the touchscreen up, go to the InterChannel tab and select
Align Phase.
22. Check that the skew time of the two signals on the oscilloscope screen is less than 1 ns.
NOTE: Do not reboot the AFG31000.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Burst external trigger adjustment
NOTE: Make sure you have accomplished the Trigger delay adjustment procedure before
accomplishing this procedure. Also, do not reboot the AFG31000 until this procedure is completed.
This procedure adjusts trigger timing of two channels in burst external trigger mode.
NOTE: This adjustment is not necessary in the AFG31021, AFG31051, AFG31101, AFG31151 and
AFG31251.
Connect the arbitrary function generator to the oscilloscope and another AFG31000, as shown in the
following figure. The AFG31000 is the external trigger source.
Figure 14: Instrument setup: burst external trigger adjustment
23. Select Default and OK on the AFG31000 to recall the arbitrary function generator default setup.
24. Select Default and OK to recall the arbitrary function generator default setup.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Function (CH1)
Pulse
Pulse (front)
AFG31252: 2 ns
Run Mode (CH1)
Burst
Burst (front)
Trigger Delay (CH1)
0.00 ns
Delay (front)
Trigger source
External
Select Trigger Source (on the
touchscreen)
Trigger Slope
Positive
Select Trigger Slope (on the
touchscreen)
Clock source
Internal
Utility(front), select System >
Clock Ref
Function (CH2)
Pulse
Pulse (front)
Leading (CH2)
AFG31022: 8 ns
AFG31252: 2 ns
Run Mode (CH2)
Burst
Burst (front)
Trigger Delay (CH2)
0.00 ns
Delay (front)
Channel 1 Output
On
On (front)
Channel 2 Output
On
On (front)
Function (CH1)
Square
Square (front)
Run Mode (CH1)
Continuous
Continuous (front)
Amplitude
6.6Vpp
Amplitude(front)
Offset
0V
Offset (front)
Frequency
100kHz
Frequency(front)
Clock source
External
Utility(front) > System > Clock
Ref
Channel 1 Output
On
On (front)
Horizontal
200 ns/div
Sec/div knob
Vertical
(CH1 and CH2)
200 mV/div
Volts/div knob
Vertical position
Align the baseline of each
channel
CH1 and CH2 Vertical position
knob
25. Set up the arbitrary function generator the AFG31000 using the following steps:
Select menu Setting Operation
Leading (CH1) AFG31022: 8 ns
AFG31052: 6 ns
AFG31102: 4 ns
AFG31152: 3 ns
AFG31052: 6 ns
AFG31102: 4 ns
AFG31152: 3 ns
26. Set up the arbitrary function generator AFG31000 using the following steps:
Select menu Setting Operation
27. Set up the oscilloscope using the following steps:
Select menu Setting Operation
28. Change the horizontal setting of the oscilloscope to 1 ns/div.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
29. Connect the PC to the AFG31000 through USB, Ethernet, or GPIB. Access the AFG31000
through Visa.
30. Send the following PI commands to set the skews to 0.0ns.
MSERvice:BURSt:SKEw 0.
MSERvice:BURSt:NEGSkew 0.
31. Write down the skew time of two signals from the oscilloscope screen.
32. Send the PI command: MSERvice:BURSt:SKEw x.xxns to the DUT. x.xxns is the value written
down in step 10.
33. Check that the skew time of the two signals on the oscilloscope screen is less than 1 ns.
34. Change Trigger Slope to Negative.
35. Write down the skew time of two signals from the oscilloscope screen.
36. Send the PI command: MSERvice:BURSt: NEGSkew x.xxns to the DUT. x.xxns is the value
written down in step 14.
37. Send the PI command: MSERvice:CALibration:SAVE
38. Check that the skew time of the two signals on the oscilloscope screen is less than 1 ns.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Horizontal
10.0 ns/div
Sec/div knob
Vertical (CH1 and CH2)
200 mV/div
Volts/div knob
Horizontal position
Align the baseline of each channel
CH1 and CH2
knob
Delay IC adjustment
This procedure adjusts the value of each bit of delay IC.
1. Connect the AFG31000 to the oscilloscope DPO70k as shown as in the following figure.
Figure 15: Delay IC adjustment
2. Push Default and OK to recall the arbitrary function generator default setup.
3. Push CH1->square->1MHz.
4. Push Default to recall the oscilloscope to the default setup.
5. Set up the oscilloscope using the following steps:
Select menu Setting Operation
Horizontal position
6. Select Horiz/Acq->Horizontal/Acquisition Setup-> Acquisition->64 to set sample mode as 64
times/Average as well as Sampling Models as ET.
7. Select Measure>Measurement Setup->Time->Delay, to set source1 Ch1 and source2 Ch2 to
Rising edge.
8. Select Vertical>Vertical Setup>Channel>deskew to adjust the Ch2 Deskew time to positive
edge align.
9. Change the Horizontal Resolution to 1.0TS/s.
10. Connect to the DUT through Visa.
11. Send the PI command: MSERvice:DELYchip:BIT BITREF to the DUT.
12. Write down the skew time of two signals from the oscilloscope screen, BITREF Trefp.
13. Send the PI command: MSERvice:DELYchip:BIT BIT0 to the DUT.
14. Write down the skew time of two signals from the oscilloscope screen, as the first bit value BIT0
T0p.
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Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
BITREF
MSERvice:DELYchip:BIT BITREF
Trefp
BIT0
MSERvice:DELYchip:BIT BIT0
T0p
BIT1
MSERvice:DELYchip:BIT BIT0
T1p
BIT2
MSERvice:DELYchip:BIT BIT0
T2p
BIT3
MSERvice:DELYchip:BIT BIT0
T3p
BIT4
MSERvice:DELYchip:BIT BIT0
T4p
BIT5
MSERvice:DELYchip:BIT BIT0
T5p
MSERvice:DELYchip:BIT BIT0
T6p
BIT7
MSERvice:DELYchip:BIT BIT0
T7p
BIT8
MSERvice:DELYchip:BIT BIT0
T8p
BIT9
MSERvice:DELYchip:BIT BIT0
T9p
15. Repeat steps 11 and 12, record the value from BIT1 to BIT9; each bit of the PI Command is
described below:
Bit PI command Adjust value
BIT6
16. Send all the following PI commands to the DUT.
MSERvice:DELYchip:VALUe BITREF,Trefp
MSERvice:DELYchip:VALUe BIT0,T0p
MSERvice:DELYchip:VALUe BIT1,T1p
MSERvice:DELYchip:VALUe BIT2,T2p
MSERvice:DELYchip:VALUe BIT3,T3p
MSERvice:DELYchip:VALUe BIT4,T4p
MSERvice:DELYchip:VALUe BIT5,T5p
MSERvice:DELYchip:VALUe BIT6,T6p
MSERvice:DELYchip:VALUe BIT7,T7p
MSERvice:DELYchip:VALUe BIT8,T8p
MSERvice:DELYchip:VALUe BIT9,T9p
MSERvice:DELYchip:VALUe:APPLy
MSERvice:CALibration:SAVE
37
Adjustment procedures
AFG31000 Series Arbitrary Function Generator Service Manual
Resetting the serial number
When you replace the CPU board, you must set the serial number. Perform the following procedure
to set the serial number.
To reset the serial number
1. Connect the PC to the AFG31000 through USB, Ethernet, or GPIB interface. Access the
instrument through Visa.
2. Send the following PI command to the instrument to set the serial number to "xxxxxxx".
MSERvice:SNUMber "xxxxxxx".
3. Send the query PI command to confirm the serial number is set successfully.
MSERvice:SNUMber?
NOTE: The installed license is bound with the serial number and MAC address. If the serial number is
changed, the installed license is invalid.
Resetting the MAC address
The MAC address is set at the factory and usually does not need to be reset. When a new MAC
address setup is required, perform the following procedure.
To reset a MAC address
1. Connect the PC to the AFG31000 through USB, Ethernet, or GPIB interface. Access the
instrument through Visa.
2. Send the following PI command to the instrument to set the MAC address to "xx-xx-xx-xx-xx-xx".
MSERvice:MADDress "xx-xx-xx-xx-xx-xx".
3. Send the query PI command to confirm the serial number is set successfully.
MSERvice:MADDress?
NOTE: The installed license is
number is changed, the installed license is invalid.
bound with the serial number and MAC address. If the MAC address
38
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. Static discharge can damage any semiconductor component in the AFG31000 Series.
Maintenance
Maintenance
This section contains information needed to do periodic, preventative, and corrective maintenance on
your AFG.
Service preparation
This product is intended for use by personnel who recognize shock hazards and are familiar with the
safety precautions required to avoid injury. Read and follow all installation, operation, and
maintenance information carefully before using the product.
If the product is used in a manner not specified, the protection provided by the product warranty may
be impaired. Operators of this product must always be protected from electric shock at all times. The
responsible body must ensure that operators are prevented access and/or insulated from every
connection point.
Refer to the Operating basics section of this manual for information.
Preventing ESD
When performing any service that requires internal access to the AFG31000 Series, follow the
precautions below. These precautions prevent damage to internal modules and components due to
electrostatic discharge (ESD).
Minimize handling of static-sensitive modules.
Transport and store static-sensitive modules in their static-protected containers or on a metal
rail. Label any package that contains static-sensitive modules.
Discharge the static voltage from your body by wearing a grounded antistatic wrist strap while
handling the modules. Service static-sensitive modules only at a static-free workstation.
Do not allow anything capable of generating or holding a static charge on the workstation
surface.
Handle circuit boards by the edges when possible.
Do not slide the modules over any surface.
Avoid handling modules in areas that have a floor or work-surface covering that will generate
a static charge.
Preventative maintenance
Preventative maintenance consists of visually inspecting and cleaning your AFG and using general
care when operating it. Perform preventative maintenance more often if you operate your AFG in a
severe environment.
39
Maintenance
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. Avoid the use of chemical cleaning agents which might damage the plastics used your
as a cleaner and rinse with deionized water.
Item
Inspect for
Repair action
Cabinet, front panel,
and cover
Cracks, scratches, deformations,
damaged hardware, or gaskets.
Repair or replace the
defective module.
Front-panel knobs
Missing, damaged, or loose knobs.
Repair or replace missing or
defective knobs.
Connectors
Broken shells, cracked insulation,
connectors.
Repair or replace the
wash out dirt.
Carrying handle, bail,
cabinet feet
Correct operation.
Repair or replace the
defective module.
General care
For optimum performance, follow these recommendations:
Protect your instrument from adverse weather conditions. It is not waterproof.
Do not store or leave your instrument where the liquid crystal display (LCD) will be exposed
to direct sunlight or high humidity for more than four hours.
The front and rear cases keep dust out of your instrument and must be in place during normal
operation.
To avoid damage to your instrument, do not expose them to any sprays, liquids, or solvents.
Inspection and cleaning
This section describes how to inspect for dirt and damage, and how to clean the exterior and interior
of your instrument. Inspecting and cleaning are done as preventative maintenance. When done
regularly, preventative maintenance, may prevent malfunctions and enhance reliability.
The collection of dirt on internal components can cause your instrument to overheat and fail. Dirt also
provides an electrical conduction path that could cause instrument failure, especially under highhumidity conditions. Inspect your instrument as often as operating conditions require.
AFG. Use only deionized water when cleaning the front panel buttons. Use an ethyl alcohol solution
Exterior inspection
Inspect the outside of your AFG for damage, wear, and missing parts, using the following checklist as
a guide. If your AFG appears to have been dropped or damaged, it should be checked thoroughly to
verify correct operation and performance. Immediately repair defects that could cause personal injury
or cause further damage to your AFG.
External inspection checklist
and deformed contacts. Dirt in
defective modules. Clear or
40
Maintenance
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. To prevent getting moisture inside your AFG during external cleaning, use only enough
To avoid damage to the surface of your AFG, do not use any abrasive or chemical cleaning agents.
CAUTION. Imported cleaning agents or methods can damage the flat panel display.
Avoid spraying liquids on the display surface.
CAUTION. To prevent getting moisture inside your AFG during external cleaning, use only enough
Exterior cleaning
To clean the AFG exterior:
1. Remove loose dust on the outside of the arbitrary function generator (AFG) with a lint-free cloth.
Use care to avoid scratching the clear glass display shield.
2. Remove remaining dirt with a lint free cloth dampened in a general-purpose detergent-and-water
solution. Do not use abrasive cleaners.
liquid to dampen the cloth or applicator.
Flat panel display cleaning
The display is a soft plastic display and must be treated with care during cleaning.
Avoid using abrasive cleaners or commercial cleaners to clean the display surface.
Avoid scrubbing the display with excessive force.
To clean the front panel
1. Clean the flat panel display surface by gently rubbing the display with a clean-room wipe (such as
Wypall Medium Duty Wipes, #05701, available from Kimberly-Clark Corporation).
2. If the display is very dirty, moisten the wipe with distilled water or a 75% isopropyl alcohol solution
and gently rub the display surface. Avoid using excess force or you may damage the plastic
display surface.
liquid to dampen the cloth or applicator.
41
Maintenance
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. To prevent damage from electrical arcing, make sure that circuit boards and components
Item
Inspect for
Repair action
Front and rear
Cracks or deformations; scratched
connectors or labels
Repair or replace defective
Loose, broken, or corroded solder
run plating
Remove failed module and replace
Solder
connections
Cold solder or rosin joints
Re-solder joint and clean with ethyl
alcohol
Wiring and cables
Loose plugs or connectors; burned,
Firmly seat connectors. Repair or
wires or cables
Chassis
Dents, deformations, and damaged
hardware
Straighten, repair, or replace
defective hardware
Interior inspection
Inspect and clean the interior of your AFG if it may have been damaged or exposed to an unusually
dirty environment.
To access the inside of your AFG for inspection and cleaning, refer to the Removal and installation
procedures.
Inspect the internal portions of your AFG for damage and wear, using the check list below as a guide.
Defects should be repaired immediately.
are dry before applying power your AFG.
Internal inspection checklist
case
Circuit boards
lettering or display filter; loose
connections; burned circuit boards;
burned, broken, or cracked circuit-
broken, or frayed wiring
hardware
with a new module
replace modules with defective
Interior cleaning
To clean the interior of your AFG
1. Remove dust with dry, low-pressure, deionized air (approximately 9 psi).
2. Remove any remaining dust with a lint-free cloth dampened in isopropyl alcohol (75% solution)
and rinse with warm deionized water (cotton-tipped applicator is useful for cleaning in narrow
spaces and on circuit boards).
NOTE: If these steps do not remove all the dust or dirt, please contact your local Keithley Instruments
office for assistance (see Contact information).
Lubrication
There is no periodic lubrication required for this instrument.
42
AFG31000 Series Arbitrary Function Generator Service Manual
WARNING. The information in this section is intended only for qualified personnel. Make sure that
electric shock.
Removal and installation
Removal and installation procedures
This section describes how to remove and install the major mechanical and electrical modules. Any
electrical or mechanical module, assembly, or part listed in the parts list is referred to as a module.
See the Replaceable parts and modules section for a list of all the replaceable modules and diagrams
showing their location in the instrument.
you turn the instrument off and disconnect the power line cord and any other cables connected to
the front and rear panel. Do not perform these procedures unless you are qualified. Failure to
recognize and observe standard safety precautions could result in personal injury or death due to
After repair adjustments
After the removal and replacement of a module due to electrical failure, perform the Adjustment
procedures.
Before disassembly
Before you disassemble the instrument, do the following:
Review Preventing ESD.
Review the exploded view diagrams in the Replaceable parts and modules section for an
overview of how the entire AFG is assembled.
Review the Order of instrument disassembly diagram to understand which procedure
must be performed to access a given module.
Review the Equipment required for disassembly to verify that you have the necessary
tools to remove and install modules in your AFG.
Equipment required for disassembly
Use the following tools to remove and replace all modules:
Torque-limiting screwdriver, long shank, 8 lb.-in (0.85 N m) range with Torx T-8, T-10, and T-
15 tips
16 mm (5/8 inch) deep socket with wide center hole
7 mm (9/32 inch) socket
8 mm socket
Torque wrench to 18 in-lb. (2.0 N m)
Pliers (all-purpose and needle-nose)
Tweezers
43
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Order of instrument disassembly
Disassembly for replacement is best achieved by removing and replacing the modules in a specific
order. Complete disassembly is best achieved by performing the removal procedures in the order
shown in the next diagram.
Figure 16: Order of disassembly
Module rear case removal and installation
You will need a torque-limiting Torx T-15 and T-10 screwdriver. Refer to the following figure, and
follow the steps below, to remove the rear cover.
To remove the module rear case:
1. Place your AFG top down on a soft surface, such as an antistatic mat.
2. Remove the two screws located on the bottom by using a Torx T-10 screwdriver.
3. Remove the two screws located behind the handle by using a Torx T-15 screwdriver.
4. Lift the rear case off.
To install the module rear case, perform the removal procedure in reverse order.
44
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 17: Module rear case
45
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Module rear chassis upper removal and installation
You will need a torque-limiting Torx T-15 screwdriver for this procedure. Refer to the following figure
and follow the steps below to remove the module rear chassis upper.
To remove the module rear chassis upper:
1. Remove the ten screws attaching the module rear chassis upper to the front chassis and the
module rear chassis-bottom. Eight screws are on the front chassis. Two screws are on the
module rear chassis-bottom.
2. Disconnect the following cables:
a. Two (2) pin fan cable from fan
b. Four (4) pin power cable (from main power supply to CPU board)
c. Seven (7) pin power cable (from main power supply to signal generator board)
d. Four (4) pin power cable (from auxiliary power supply to signal generator board)
e. Three (3) pin power cable (from main power supply to CPU board)
f. Three (3) pin cable (from auxiliary power supply to CPU board)
3. Lift the module rear chassis upper off.
To install the module rear chassis upper, perform the removal procedure in reverse order.
46
Figure 18: Module rear upper chassis upper
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 19: Module rear chassis, upper cables
Module rear chassis bottom removal and installation
You will need a torque-limiting Torx T-15 and T-10 screwdriver for this procedure. Refer to the
following figure and follow the steps below to remove the module rear chassis-bottom.
To remove the module rear chassis-bottom:
1. Remove two screws attaching the rear chassis-bottom to front chassis by using T-15 screwdriver.
2. Remove five screws attaching the rear chassis-bottom to front chassis by using T-10 screwdriver.
3. Disconnect the following cables:
a. Front panel cable
b. Display module flexible flat cable (FFC); (to disconnect the display module FFC, flip up the brown
connector cover and pull out the FFC)
4. Lift the module rear chassis-bottom off.
To install the module rear chassis-bottom, perform the removal procedure in reverse order.
Figure 20: Module rear chassis, bottom
47
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 21: Module rear chassis, bottom, cables
Figure 22: Disconnecting the display module
48
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Module front chassis removal and installation
You will need a torque-limiting Torx T-15 screwdriver for this procedure. Refer to the following figure
and follow the steps below to remove the module front chassis.
To remove the module front chassis:
1. Remove six screws attaching the front chassis to front cover by using T-15 screwdriver.
2. Disconnect the following cables:
a. Front panel cable
b. Display module flexible flat cable (FFC); (to disconnect the FFC, you should pull outward on the two
brown ears of the FFC connector on the display and pull out the FFC)
3. Pull the module front chassis out.
NOTE: To install the module front chassis, perform the removal procedure in reverse order.
Figure 23: Module front chassis
Figure 24: Module front chassis cables
49
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Front-panel board: Power button, keypad, and LCD module removal and installation
You will need a torque-limiting Torx T-15 screwdriver, pliers, and tweezers for this procedure. Refer to
the following figure and follow the steps below to remove the front panel board and keypad.
To remove the front panel board and keypad:
1. Use tweezers to grasp the springs; remove the eight screws attaching the front panel board to the
front cover (refer to the following figure).
2. Remove the encoder plastic cover.
3. Reverse the whole module to be the other side.
4. Remove the front panel board and keypad.
5. Remove the power button.
6. Use an 8 mm socket driver to remove the six locknuts attaching the LCD module to the front
cover.
7. Remove the LCD module
NOTE: To install all the parts, perform the removal procedure in reverse order.
50
Figure 25: Front panel board and keyboard
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
BNC insulator board and signal generator board removal and installation
You will need a torque-limiting Torx T-15 screwdriver and a 16 mm (5/8 inch) deep socket with a wide
center hole to remove the BNC insulator board (or BNC insulator sheet) and the generator board.
Refer to the following figure and follow the steps below to remove the boards.
To remove the insulator board:
1. Remove the four hex nuts attaching the BNC insulator board (or three hex nuts for the BNC
insulator sheet) to the front chassis by using a 16 mm (5/8 inch) socket. Remove the three screws
attaching the BNC insulator board to the front chassis by using T-15 screwdriver.
2. Remove the BNC insulator board (or sheet).
3. Remove the three screws near the BNC connectors using a T-15 screwdriver.
4. Remove the eight screws attaching the signal generator board to the front chassis using a T-15
screwdriver.
5. Gently pull out the signal board toward the rear.
6. Remove the BNC insulator washer.
NOTE: T
o install all the parts, perform the removal procedure in reverse order.
Figure 26: BNC insulator board (or sheet)
Figure 27: Signal generator board
51
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 28: BNC insulator washer
52
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
CPU board and power receptacle removal and installation
You will need torque-limiting Torx T-15, T-10, and T-8 screwdrivers for this procedure. Refer to the
following figure and steps below to remove the front panel board and keypad.
To remove the CPU board and power receptacle:
1. Disconnect the cables.
2. Remove one screw attaching the grounding cable to the chassis by using the T-10 screwdriver.
Remove the two screws attaching the power receptacle to the chassis using the T-8 screwdriver.
3. Remove the power receptacle.
4. Remove the four screws attaching the CPU board to the rear bottom-chassis using the T-15
screwdriver.
5. Remove the five BNC nuts and washers using the 16 mm socket driver.
6. Remove the two black GPIB hex screws using the 7 mm socket driver.
7. Pull out the CPU board.
NOTE: To reconnect all the parts, perform the removal procedure in reverse order.
Figure 29: Power receptacle
53
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 30: Remove the BNC nuts and GPIB hex screws.
Power supply and fan removal and installation
You will need needle-nose pliers and a torque-limiting Torx T-15 screwdriver for this procedure. Refer
to the following figure and follow the steps below to remove or install all the parts.
To remove the power supply and fan:
1. Remove the four screws attaching the safety cover to the chassis by using a T-15 screwdriver.
2. Remove the safety cover.
3. Remove the four screws attaching the auxiliary power supply to the chassis using a T-15
screwdriver. Remove the four screws attaching the main power supply to the chassis using a
T-15 screwdriver. The auxiliary power supply is only applicable for the two-channel unit.
4. Remove the main power supply (and auxiliary power supply, if applicable).
5. Remove the four grommets attaching the fan to the chassis using needle-nose pliers.
6. Remove fan.
NOTE: To reconnect all the parts, perform the removal procedure in reverse order.
54
Figure 31: Safety cover
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 32: Power supply: Removal and distribution
Figure 33: Fan: Removal and installation
Diagrams
The diagrams in this section show how the modules in the different models of the AFG are
connected.
55
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
AFG 3xxx2 connection diagram
Figure 34: AFG31000 Series 2 channels unit interconnection diagram
AFG 3xxx1 connection diagram
56
Figure 35: AFG31000 Series 1 channel unit interconnection diagram
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
1
Figure and index number
Items in this section are referenced by component
number.
2
Tektronix part number
Use this part number when ordering replacement parts
from Tektronix.
3
Instrument model
This indicates the model of instrument that uses this
item.
4 and 5
Serial number
Column four indicates the serial number at which the
indicate the part is good for all serial numbers.
6
Quantity
This indicates the quantity of parts used.
7
Name and description
An item name is separated from the description by a
identification.
Replaceable parts and modules
This section contains a list of the replaceable parts and modules for the AFG 31000 Series.
Parts ordering information
Replacement parts and modules are available through your local Tektronix field office or
representative (see Contact information).
Changes to Tektronix instruments are sometimes made to accommodate improved components as
they become available and to give you the benefit of the latest circuit improvements. Therefore, when
ordering parts, it is important to include the following information in your order.
Part number
Instrument type or model number
Instrument serial number
Instrument modification number, if applicable
If you order a part that has been replaced with a different or improved part, your local Tektronix field
office or representative will contact you concerning any change in part number.
Using the replaceable parts list
This section contains a list of the mechanical and electrical components that are replaceable for the
arbitrary function generator. Use this list to identify and order replacement parts and modules. The
following table describes each column in the parts list.
Column Column name Description
part was first effective. Column five indicates the serial
number at which the part was discontinued. No entries
colon (:). Because of space limitations, an item name
may sometimes appear as incomplete. Use the U.S.
Federal Catalog handbook H6-1 for further item name
NOTE: Abbreviations conform to the American National Standard ANSI Y1.1-1972.
57
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-1
N/A
AFG31021
AFG31252
1
Module front case
-2
N/A
AFG31021
AFG31252
1
Module front chassis
-3
211-1273-xx
AFG31021
AFG31252
6
Screw, PT; K35-1.57,
-4
N/A
AFG31021
AFG31252
1
Module rear chassis
Exploded diagram replaceable parts - AFG top level modules
Use the following table and figure to determine the replaceable parts and modules in your AFG top
level modules.
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
pan-head, STL, ZNPL, T15 Torx; exact
(nonexpensed) duplicate
of 211114300
58
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
bottom
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-5
211-0538-00
AFG31021
AFG31252
7
Screw, machine;
-6
211-1272-00
AFG31021
AFG31252
12
Screw, machine;
-7
N/A
AFG31021
AFG31252
1
Module rear chassis
-8
N/A
AFG31021
AFG31252
1
Module rear case
-9
211-0935-00
AFG31021
AFG31252
2
Screw, machine;
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
6-32 x 0.312, FLH,
100 DEG, STL, ZNPL, T10 Torx
6-32 X 0.250, PNH, STL,
ZNPL, T-15 Torx
upper
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
6-32 x 0.50, PNH,
T-15 Torx
59
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Exploded diagram - AFG top level modules
Figure 36: AFG31000 top level modules exploded view
60
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-01
202-0551-00
AFG31021
AFG31252
1
Front case
-02
119-8852-00
AFG31021
AFG31252
1
Display module with
-03
348-2304-00
AFG31021
AFG31252
4
Gasket, conductive foam
-04
260-3074-00
AFG31021
AFG31252
1
Keypad
Exploded diagram replaceable parts - module front case
Use the following table and figure to determine the replaceable parts and modules in your AFG
module front case.
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
projected capacitance
touchscreen; 9-inch, TFT
LCD, 800 X 480, RGB
interface, CTP 5-point
touch, custom cover
glass with custom silk
screen, safety controlled
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
61
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-05
878-1398-00
AFG31021
AFG31252
-06
211-1273-00
AFG31021
AFG31252
8
Screw, PT; K35-1.57,
-07
366-0938-00
AFG31021
AFG31252
1
Button power
-08
335-3773-00
AFG31022
AFG31252
1
Label front
AFG31251
-09
335-3774-00
AFG31252
1
Marker, identification,
335-3963-00
AFG31021
1
Marker, identification,
335-3962-00
AFG31051
1
Marker, identification,
335-3961-00
AFG31101
1
Marker, identification,
335-3960-00
AFG31151
1
Marker, identification,
335-3959-00
AFG31251
1
Marker, identification,
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
Pan head, STL, ZNPL, T15 Torx; Exact (Nonexpensed) duplicate of
211114300
AFG31052
AFG31102
AFG31152
335-3965-00 AFG31021
AFG31051
AFG31101
AFG31151
1 Label front
label, front, USB
label, front, USB
label, front, USB
label, front, USB
label, front, USB
label, front, USB
62
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
335-3958-00
AFG31022
1
Marker, identification,
335-3957-00
AFG31052
1
Marker, identification,
335-3956-00
AFG31102
1
Marker, identification,
335-3955-00
AFG31152
1
Marker, identification,
-10
366-0937-00
AFG31021
AFG31252
1
Knob, grip
-11
253-0583-00
AFG31021
AFG31252
1
Conductive fabric tape
-12
131-8139-00
AFG31021
AFG31252
1
Contact, spring; front
Index
number
Tektronix part
number
Instrument model Quantity Name and description
label, front, USB
label, front, USB
label, front, USB
label, front, USB
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
for shielding 87580-STD
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
panel elect.
63
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Exploded diagram - module front case
Figure 37: AFG31000 front case exploded view
64
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-01
441-2877-00
AFG31021
AFG31252
1
Chassis front
-02
878-1680-00
AFG31152
1
Circuit board assembly;
878-1487-00
AFG31021
1
Circuit board assembly;
878-1679-00
AFG31151
1
Circuit board assembly;
878-1490-00
AFG31022
1
Circuit board assembly;
-03
210-1700-00
AFG31021
AFG31252
1
BNC insulate washer
Exploded diagram replaceable parts - module front chassis
Use the following table and figure to determine the replaceable parts and modules in your AFG
module front-chassis.
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31252
AFG31051
AFG31101
AFG31251
generator board; 2 CH;
389-5449-00 wired;
AFG31152/AFG31252
generator board;
1 CH; 389-5224-00
wired, low-end models
generator board;
1 CH; 389-5449-00
wired;
AFG31151/AFG31251
AFG31052
AFG31102
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
generator board;
2 CH; 389-5224-00
wired; low-end models
65
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-04
174-6976-00
AFG31021
AFG31252
1
FFC display 50 POS
-05
174-6977-00
AFG31021
AFG31252
1
Cable, ribbon, 2 x 5 pin
-06
878-1600-00
AFG31151
AFG31252
1
Circuit board assembly;
337-4828-00
AFG31021
AFG31101
1
Insulation sheet
-07
211-0935-00
AFG31021
AFG31252
3
Screw, machine;
-08
211-1272-00
AFG31021
AFG31252
13
Screw, machine;
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
0.5 mm pitch
front panel board to CPU
board
BNC board 389-5386-00
wired
AFG31051
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
6-32 x 0.50, PNH,
T-15 Torx
6-32 x 0.250, PNH, STL,
ZNPL, T-15 Torx
66
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-09
220-0497-00
AFG31022
AFG31252
4
Nut, plain hex;
AFG31251
Index
number
Tektronix part
number
220-0497-00 AFG31021
Instrument model Quantity Name and description
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
3 Nut, plain hex;
Exploded diagram - module front chassis
.5-28 x .562 hex, BRS,
NI (nickel) plated
.5-28 x .562 hex, BRS,
NI (nickel) plated
Figure 38: AFG31000 front chassis exploded view
67
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-01
441-2879-00
AFG31021
AFG31152
1
Chassis rear bottom side
441-2918-00
AFG31252
1
Chassis rear bottom side
AFG31252
Circuit board assembly,
878-1491-00
AFG31021
AFG31251
1
Circuit board assembly,
-03
211-1272-00
AFG31021
AFG31252
4
Screw, machine;
-04
210-1039-00
AFG31022
AFG31252
5
Washer, lock internal
210-1039-00
AFG31021
AFG31251
4
Washer, lock internal
Exploded diagram replaceable parts - module rear chassis bottom
Use the following table and figure to determine the replaceable parts and modules in your AFG
module rear chassis-bottom.
Index
number
-02 878-1399-00 AFG31022
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
FIP
1
CPU board, 2CH
CPU board, 1CH
6-32 x 0.250, PNH, STL,
ZNPL, T-15 Torx
68
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
tooth
tooth
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-05
220-0497-00
AFG31022
AFG31252
5
Nut, plain, hex;
220-0497-00
AFG31021
AFG31251
4
Nut, plain, hex;
-06
119-7086-00
AFG31021
AFG31252
1
Filter, EMI; ac line
-07
211-0303-00
AFG31021
AFG31252
2
Screw, machine;
-08
210-0056-00
AFG31021
AFG31252
2
Washer, lock;
-09
213-0610-00
AFG31021
AFG31252
2
Screw machine;
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
5-28 x .562 hex, BRS, NI
(nickel) plated
5-28 x .562 hex, BRS, NI
(nickel) plated
connector/input filter;
6.0A, 120-250 V ac, dc400 HZ,2.2 NF CY, 100
NF CX, IEC input, Faston/solder lug output,
chassis mount, safety
controlled; FN9222-6-06
4-40 x 0.25, FLH 100
DEG, steel, zinc finish,
T-8 Torx
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
#10 split, 0.047 THK,
SI BRZ NP
4BA x 1.0, OVH, STL
CRPL, POZ telequipment
69
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-10
211-0711-00
AFG31021
AFG31252
1
Screw, with washer,
-11
174-7030-00
AFG31021
AFG31252
1
Cable, power auxiliary
-12
196-3496-00
AFG31021
AFG31252
1
Lead, elect (rear sub-
-13
174-5151-00
AFG31021
AFG31252
1
CA assembly, SP, elect;
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
6-32 x .250 panhead,
T-15 Torx
power supply to CPU
board
panel to inlet), safety
controlled
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
2, 18 AWG, 7 CML, with
holder, 09050-3031 &
faston
70
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Exploded diagram - module rear chassis bottom
Figure 39: AFG31000 rear chassis bottom exploded view
71
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-01
441-2878-00
AFG31021
AFG31152
1
Chassis rear top side
441-2919-00
AFG31252
1
Chassis rear top side FIP
-02
119-7271-04
AFG31021
AFG31252
1
Power supply; ac-dc;
-03
119-8853-00
AFG31022
1
Power supply; ac-dc;
-04
441-2880-00
AFG31021
AFG31252
1
Cover, protection power
Exploded diagram replaceable parts - module rear chassis upper
Use the following table and figure to determine the replaceable parts and modules in your AFG
module rear chassis upper.
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31052
AFG31102
AFG31152
AFG31252
150 W max in;
87-264 V ac, 47-63 HZ,
100-127 V ac, 360-440
HZ in; +4.3V @ 2.3A,
+7.5V @ 3.2A, +18V @
2A, -18V @ 2A out;
safety controlled
internal; 85 - 265 V ac,
47-63 HZ, means input;
30-watt, single output 12
V dc, 2.5A; no case;
safety controlled
72
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
supply cover
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-05
211-1272-00
AFG31021
AFG31252
12
Screw, machine;
-06
119-8177-00
AFG31021
AFG31252
1
Fan, tube axial (92 MM,
-07
348-2082-00
AFG31021
AFG31252
4
Grommet, fan mount,
-08
174-7031-00
AFG31021
AFG31252
1
Cable, power auxiliary
-10
253-0583-00
AFG31252
1
Conductive fabric tape
-11
346-0299-00
AFG31021
AFG31252
1
Cable ties
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
6-32 X 0.250, PNH, STL,
ZNPL, T-15 Torx
dc, assembly), safety
controlled
noise damping
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
-09 337-4850-00 AFG31252 1 Absorber NFS40100
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
supply to SG board
for shielding 87580-STD
73
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Exploded diagram - module rear chassis upper
Figure 40: AFG31000 rear chassis-upper exploded view
74
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-01
348-1909-00
AFG31021
AFG31252
2
Foot, rear; safety
-02
348-1910-00
AFG31021
AFG31252
2
Foot, front cabinet,
-03
214-5148-00
AFG31021
AFG31252
2
Spring front foot
-04
202-0552-00
AFG31021
AFG31252
1
Case, rear
Exploded diagram replaceable parts - module rear case
Use the following table and figure to determine the replaceable parts and modules in your AFG
module rear-case.
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
controlled
hinged
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
75
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
-05
367-0598-00
AFG31021
AFG31252
1
Handle, carrying over
-06
335-3776-00
AFG31021
AFG31252
1
Marker identification,
-07
335-3878-00
AFG31022
AFG31252
1
Marker identification,
335-3964-00
AFG31021
AFG31251
1
Marker identification,
AFG31252
Index
number
Tektronix part
number
Instrument model Quantity Name and description
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
AFG31052
AFG31102
AFG31152
molded, safety controlled
label, rear, safety
label rear cover analog
I/O
AFG31051
AFG31101
AFG31151
-08 335-3879-00 AFG31021
AFG31051
AFG31101
AFG31151
AFG31251
AFG31022
AFG31052
AFG31102
AFG31152
label analog I/O, 1CH
1 Marker identification,
label rear digital I/O
76
Removal and installation
AFG31000 Series Arbitrary Function Generator Service Manual
Exploded diagram - module rear case
Figure 41: AFG31000 rear case exploded view
77
AFG31000 Series Arbitrary Function Generator Service Manual
Digital multimeter (DMM)
3.5 inch or greater digit DMM
Oscilloscope with probe
Tektronix TDS 1000 or TDS 2000 series
oscilloscope
WARNING. Connection and wiring procedures in this document are intended for use by qualified
safety precautions could result in personal injury or death.
Troubleshooting
Troubleshooting
This section contains the following information to help you isolate faulty modules in the AFG31000
Series Arbitrary Function generators.
Troubleshooting trees – Show how to find and isolate faulty modules.
Diagnostics – Describes the diagnostics supplied with the AFG, operation, and status
messages.
After y
ou troubleshoot and identify a faulty part, use the Removal and installation procedures to
replace a module.
Troubleshooting tools and equipment
You may need the following tools and equipment to troubleshoot your AFG:
Tools and equipment Example
Troubleshooting trees
To isolate a problem to a specific troubleshooting procedure, use the following troubleshooting trees.
The trees make use of internal diagnostic routines to speed fault isolation to a module.
personnel only. To prevent electrical shock, do not touch the heat sink of the power supply module.
There are potentially dangerous voltages present on the heat sink of the power supply module. Do
not perform these procedures unless qualified to do so. Failure to recognize and observe normal
78
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
79
Figure 42: Platform troubleshooting tree
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
Figure 43: Generator troubleshooting tree
80
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
Diagnostics
When the arbitrary function generator is powered up, the instrument automatically executes a
diagnostic test for all diagnostic items before the startup screen appears.
If an error is detected, the diagnostic test displays an error message. If you see an error message,
select OK to proceed with the next step. The arbitrary function generator software starts. If the
instrument contains an unresolved error, the test will not execute.
See Diagnostic error codes for more information.
Perform diagnostics and calibration
When powering on the instrument, it performs a limited set of hardware tests. You can also run the
following manual diagnostic and calibration functions from the Utility menu (see Utility menu options
for more detail). This procedure uses internal routines to verify that the instrument is operating
correctly.
Diagnostics (self-test): Perform diagnostics to verify that your instrument is operating
correctly.
Calibration (self-calibration): The calibration function checks dc accuracy using the internal
calibration routines.
81
Figure 44: Diagnostics and calibration
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
CAUTION. Do not remove power from the instrument while performing calibration. If the power is
NOTE: If you need to verify that the instrument meets the warranted specifications, do the complete set
of performance verification procedures provided in the Specifications and Performance Verification
Manual.
To perform diagnostics and calibration:
turned off during calibration, data stored in the internal memory may be lost.
NOTE: Disconnect all cables from the instrument when you perform diagnostics or calibration (do not
remove the power cord).
1. Select Utility on the touchscreen.
2. Select Diagnostics/Calibration in the menu.
3. To perform diagnostics, select Run.
4. Select OK to perform diagnostics or Cancel to exit.
Figure 45: Run system diagnostics
82
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
5. Wait until the test is completed. The diagnostics test takes eight minutes to complete.
6. To perform calibration, select Run.
7. Select OK to perform calibration or Cancel to exit.
Figure 46: Run self-calibration
8. Wait until the test is completed. The diagnostics test takes eight minutes to complete.
9. Once calibration or diagnostics is executed, a dialog box displays the results including any errors.
83
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
2101
Calibration data checksum failure
2301
CH1 internal offset failure
2302
CH2 internal offset failure
2303
CH1 output offset failure
2304
CH2 output offset failure
2306
CH2 output gain failure
2401
CH1 x12 dB K12 attenuator failure
2402
CH2 x12 dB K22 attenuator failure
2403
CH1 x20 dB K13 attenuator failure
2404
CH2 x20 dB K23 attenuator failure
2405
CH1 x20 dB K14 attenuator failure
2407
CH1 x14 dB/20 dB K15 attenuator failure
AFG31022, AFG31051, AFG31052, AFG31101, AFG31102)
2409
CH1 x20 dB K18 attenuator failure
2410
CH2 x20 dB K28 attenuator failure
2411
CH1 filter failure
2412
CH2 filter failure
2415
U51 failure
2501
CH1 ASIC failure
2503
Ch1 ADC failure
2504
Ch2 ADC failure
Self-test error codes
If the self-tests detect a malfunction, the AFG31000 Series displays [name of the test]
failed! and the error code. The following table lists the error codes with a description of the error
and modules related to the error.
Table 3: Output diagnostics error codes
Error code Description
2305 CH1 output gain failure
2406 CH2 x20 dB K24 attenuator failure
(14 dB for AFG31151, AFG31152, AFG31251, AFG31252; 20 dB for AFG31021,
2408 CH2 x14 dB/20 dB K25 attenuator failure
2502 Ch2 ASIC failure
84
Troubleshooting
AFG31000 Series Arbitrary Function Generator Service Manual
1101
CH1 internal offset calibration failure
1102
CH2 internal offset calibration failure
1104
CH2 output offset calibration failure
1105
CH1 output gain calibration failure
1106
CH2 output gain calibration failure
1201
CH1 x12 dB K12 attenuator calibration failure
1202
CH2 x12 dB K22 attenuator calibration failure
1203
CH1 x20 dB K13 attenuator calibration failure
1204
CH2 x20 dB K23 attenuator calibration failure
1205
CH1 x20 dB K14attenuator calibration failure
1206
CH2 x20 dB K24attenuator calibration failure
1207
CH1 x14 dB/20dB K15 attenuator calibration failure
1208
CH2 x14 dB/20dB K25 attenuator calibration failure
1209
CH1 x20 dB K18 attenuator calibration failure
1210
CH2 x20 dB K28 attenuator calibration failure
1212
CH2 filter calibration failure
1215
U51 calibration failure
1216
Saving calibration file failure
3001
Error code of Offset_DAC correction for CH1 about X4 attenuation
3002
Error code of Offset_DAC correction for CH2 about X4 attenuation
3004
Error code of Offset_DAC correction for CH2 about X16 attenuation
3005
Error code of variable gain correction for CH1 about X4 attenuation
3006
Error code of variable gain correction for CH2 about X4 attenuation
3007
Error code of variable gain correction for CH1 about X16 attenuation
3008
Error code of variable gain correction for CH2 about X16 attenuation
3009
Error code of attenuation circuit coefficient's correction for CH1 about X4
attenuation
3010
Error code of attenuation circuit coefficient's correction for CH2 about X4
attenuation
3011
Error code of attenuation circuit coefficient's correction for CH1 about X16
attenuation
3012
Error code of attenuation circuit coefficient's correction for CH2 about X16
attenuation
Table 4: Calibration error codes
Error code Description
1103 CH1 output offset calibration failure
1211 CH1 filter calibration failure
3003 Error code of Offset_DAC correction for CH1 about X16 attenuation
85
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