Tektronix AM 503B Series User manual

Instructions
AM 503B, AM 5030 & A6300 Series
067-0271-00 Verification and Adjustment Kit
070-9352-01
This document applies to firmware version 3.0
and above.
Warning
The servicing instructions are for use by qualified
personnel only. To avoid personal injury, do not
perform any servicing unless you are qualified to
do so. Refer to all safety summaries prior to
performing service.

Copyright Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
Printed in the U.S.A.
Tektronix, Inc., P.O. Box 1000, Wilsonville, OR 97070–1000
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

AM 503B, AM 5030, and A6300 Series Verification and Adjustment i
Table of Contents
General Safety Summary iii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Service Safety Summary vii. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kit Description 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Kit Parts List 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Required 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AM 503B and AM 5030 Performance Verification 3. . . . . . . . . . . . . . .
Test Procedure Conditions 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Accuracy 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Balance 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RMS Noise 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Degauss 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
GPIB Installation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assemble GPIB Test Fixture 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remove Side Covers 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Install GPIB Test Fixture 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AM 503B and AM 5030 Adjustments 19. . . . . . . . . . . . . . . . . . . . . . . . . .
Amplifier Setup 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calculate and Load New Calibration Constants 20. . . . . . . . . . . . . . . . . . . . . . . . .
GPIB Removal (AM 503B Only) 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Setup for Current Probes 23. . . . . . . . . . . . . .
Test Procedure Conditions 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Preparation 23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranted Specifications 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6312 Performance Verification 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Test Equipment 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Accuracy 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6302 and A6302XL Performance Verification 35. . . . . . . . . . . . . . . . . .
Required Test Equipment 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Accuracy 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6303 and A6303XL Performance Verification 45. . . . . . . . . . . . . . . . . .
Required Test Equipment 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Accuracy 50. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6304XL Performance Verification 55. . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Test Equipment 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rise Time 56. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bandwidth 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Accuracy 58. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii AM 503B, AM 5030, and A6300 Series Verification and Adjustment
Adjustment Procedures for Current Probes 63. . . . . . . . . . . . . . . . . . . . .
A6312, A6302 and A6302XL Adjustment 65. . . . . . . . . . . . . . . . . . . . . . .
Required Test Equipment 65. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6312, A6302 and A6302XL DC Offset Adjustment 65. . . . . . . . . . . . . . . . . . . . .
A6303 and A6303XL Adjustments 69. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Test Equipment 69. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6303 and A6303XL DC Offset Adjustment 70. . . . . . . . . . . . . . . . . . . . . . . . . . .
A6303 and A6303XL Transient Response and Gain Adjustment 72. . . . . . . . . . . .
A6304XL Adjustments 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Required Test Equipment 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6304XL DC Offset Adjustment 76. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DC Gain Adjustment 78. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A6304XL Transient Response Adjustment 80. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

AM 503B, AM 5030, and A6300 Series Verification and Adjustment iii
General Safety Summary
Review the following safety precautions to avoid injury and prevent damage to
this product or any products connected to it.
Only qualified personnel should perform service procedures.
While using this product, you may need to access other parts of the system. Read
the General Safety Summary in other system manuals for warnings and cautions
related to operating the system.
Injury Precautions
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, ensure that the product is properly grounded.
To avoid electric shock or fire hazard, do not operate this product with covers or
panels removed.
To avoid electric shock, do not operate this product in wet or damp conditions.
To avoid injury or fire hazard, do not operate this product in an explosive
atmosphere.
To avoid injury, remove jewelry such as rings, watches, and other metallic
objects. Do not touch exposed connections and components when power is
present.
Ground the Product
Do Not Operate Without
Covers
Do Not Operate in
Wet/Damp Conditions
Do Not Operate in
Explosive Atmosphere
Avoid Exposed Circuitry

General Safety Summary
iv AM 503B, AM 5030, and A6300 Series Verification and Adjustment
Product Damage Precautions
Do not operate this product from a power source that applies more than the
voltage specified.
Before applying power, ensure that the line selector is in the proper position for
the power source being used.
To prevent product overheating, provide proper ventilation.
If you suspect there is damage to this product, have it inspected by qualified
service personnel.
Safety Terms and Symbols
These terms may appear in this manual:
WARNING. Warning statements identify conditions or practices that could result
in injury or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in
damage to this product or other property.
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.
Use Proper Power Source
Use Proper Voltage
Setting
Provide Proper Ventilation
Do Not Operate With
Suspected Failures
Terms in This Manual
Terms on the Product

General Safety Summary
AM 503B, AM 5030, and A6300 Series Verification and Adjustment v
The following symbols may appear on the product:
ProtectiveGround
(Earth)Terminal ATTENTION Refer to Manual Double Insulated
DANGER
High Voltage
Certifications and Compliances
CSA Certification includes the products and power cords appropriate for use in
the North America power network. All other power cords supplied are approved
for the country of use.
For plug-in modules that are safety certified by Underwriters Laboratories, UL
Listing applies only when the module is installed in a UL Listed product. CSA
Certification applies only when the module is installed in a CSA Certified
product.
Symbols on the Product
CSA Certified Power
Cords
Safety Certification of
Plug-in Modules

General Safety Summary
vi AM 503B, AM 5030, and A6300 Series Verification and Adjustment

AM 503B, AM 5030, and A6300 Series Verification and Adjustment vii
Service Safety Summary
Only qualified personnel should perform service procedures. Read this Service
Safety Summary and the General Safety Summary before performing any service
procedures.
Do not perform internal service or adjustments of this product unless another
person capable of rendering first aid and resuscitation is present.
To avoid electric shock, disconnect the main power by means of the power cord
or, if provided, the power switch.
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.
To avoid electric shock, do not touch exposed connections.
Do Not Service Alone
Disconnect Power
Use Care When Servicing
With Power On

Service Safety Summary
viii AM 503B, AM 5030, and A6300 Series Verification and Adjustment

AM 503B, AM 5030, and A6300 Series Verification and Adjustment 1
Kit Description
This kit includes parts and instructions for verifying and adjusting the AM 503B
and AM 5030 Current Probe Amplifiers. The recommended calibration interval
is one year.
These instructions assume a certain familiarity with the AM 503B and AM 5030
amplifiers. For servicing information, refer to the AM 503B & AM 5030
Instruction Manual (070-8766-XX).
Before you begin the AM 503B or AM 5030 amplifiers, assemble the test
equipment required and determine if a full calibration is necessary. None of the
components contained in this kit require calibration.
Kit Parts List
This kit includes the parts listed in Table 1.
Table 1: Kit Parts List
Tektronix Part Number Quantity Description
015-0598-00 1 Voltage adapter
015-0670-00 1 Feed-thruadapter
129-0425-00 2 Spacer, post: 0.9 L, 4-40 thru, 0.25 hex
174-2314-00 1 Ribbon cable
211-0408-00 6 Screw, assem wshr: 4-40 X 0.250, T-10 Torx
220-0729-00 1 Nut block: 4-40 X 0.188
679-2836-02 1 GPIB board
070-9352-XX 1 CalibrationKitManual
Equipment Required
The installation procedure requires a T-10 Torxscrewdriver and a flat-blade
screwdriver.
The performance verification and adjustment procedures require the test
equipment listed in Table 2. The test equipment must meet or exceed the

Kit Description
2AM 503B, AM 5030, and A6300 Series Verification and Adjustment
specifications listed. You may need to modify the test procedures if you do not
use the recommended equipment.
Table 2: Required Test Equipment
Qty Item Description Recommended
Equipment
1 Oscilloscope 500 MHz bandwidth TDS 520B
1Leveled Sine Wave
Generator 3 MHz to 100 MHz Wavetek 9100 with Option 250 or SG 503
equivalent.
1DigitalMultimeter 0.20%,31/2digit resolution, range
±50 mV DM2510/Gor Fluke850x/884x
1CurrentSource 0.1%, 0 to ±1 A Fluke 5700A or
Wavetek 9100 with
Option250
1Calibration Fixture 50 , BNC Connector 015-0601-50
1 Termination 50  ±0.1%, 0.5 W 011-0129-00
2BNC Cables 50 , 1.05 m (42 in) long 012-0057-01
2 BNC to Dual
BananaAdapters 103-0090-00
1Feed-thruFixture supplied with kit 015-0670-00
1VoltageAdapter supplied with kit 015-0598-00
1CurrentProbe1A6302
1Required for functional test only.

AM 503B, AM 5030, and A6300 Series Verification and Adjustment 3
AM 503B and AM 5030 Performance Verification
Refer to the list of equipment required in Table 2 on page 2. Set up the AM 503B
or AM 5030 amplifiers as follows:
1. Plug the AM 503B or AM 5030 amplifier into the TM 5000 mainframe.
2. Power the amplifier on and let it warm up at least 20 minutes.
The procedures in this section verify that the AM 503B or AM 5030 amplifier
meets the warranted specifications listed in Table 3.
Table 3:AM 503B and AM 5030 Warranted Specifications
Parameter Characteristic
DC Gain Accuracy ≤1.5% after DC accuracy measurement and cal constant
loading.
DCBalance ±2 mV
RMSNoise ≤250 A (2.5 mV)
Bandwidth ≥100 MHz
Test Procedure Conditions
These procedures are valid only under the following conditions:
HThe system has been calibrated at an ambient temperature of 23_±5_C.
HThe system is operating in an environment whose limits are described in
Table 4.
Table 4: AM 503B and AM 5030 Environmental Characteristics
Parameter Characteristic
AmbientTemperature
Operating 0_C to +50_C
Humidity
Operating 50_C, to 95% R.H.
HThe system, including probe, has had a warm-up period of at least
20 minutes.

AM 503B and AM 5030 Performance Verification
4AM 503B, AM 5030, and A6300 Series Verification and Adjustment
DC Gain Accuracy
Use the following procedure to verify the DC gain accuracy of the amplifier.
Refer to Figure 1 and set up the test equipment as follows:
1. Connect the output of the amplifier to the DMM.
a. Connect a BNC Cable from the AM 503B/AM 5030 OUTPUT to the
50 feedthrough termination.
b. Attach the termination to a BNC-to-dual banana adapter.
c. Observe polarity and insert the dual banana adapter into the digital
multimeter DC voltage input.
2. Connect the input to current source.
a. Connect the other BNC cable from the Voltage Adapter to a BNC-to-
dual banana adapter.
b. Observe polarity and insert the dual banana adapter into the current
source DC output. Do not connect the voltage adapter to the amplifier at
this time.
Current
Source
DMM
+–
BNC to Dual
BananaAdapter
50 Termination
50 Coaxial
Cable
Amplifier in TM
Series Power
Module
+–
Voltage Adapter BNC to Dual
Banana Adapter
Feed-Thru Fixture
Figure 1: Test Equipment Setup
Test Equipment Setup

AM 503B and AM 5030 Performance Verification
AM 503B, AM 5030, and A6300 Series Verification and Adjustment 5
3. Make or verify the equipment settings in Table 5:
Table 5: Equipment Settings
DigitalMultimeter
MeasurementType DC volts
Range Autoranging
Current Source
Output Off
AM 503B and AM 5030 Amplifier
Coupling DC
BW Limit On (20 MHz)
Current/division 10 mA/division
Probe Trim 000
After the equipment is set up, proceed as follows:
1. Connect the feed-thru fixture (015-0670-00) to the INPUT of the AM 503B/
AM 5030 amplifier and press the PROBE DEGAUSS AUTOBALANCE
button. Wait for the degauss/autobalance routine to complete before
proceeding. The routine is complete when the indicator light turns off.
2. Remove the feed-thru fixture from the INPUT of the amplifier and connect
the Voltage Adapter (015-0598-00) to the INPUT of the amplifier. Do not
press the PROBE DEGAUSS AUTOBALANCE button again even though
the indicator is flashing.
3. For each of the current/division settings in Table 6, perform the following
steps. Remember that any errors that develop here will affect the final DC
gain accuracy calculations at the end.
a. Set the Amplifier to the desired current/division setting from Table 6.
b. Set the current source to the correct positive test current using Table 6.
c. Turn on the current source.
d. Record the exact measurement of the digital multimeter as M1. (You can
copy Table 7 on page 8 to record the results of your measurements.)
e. Set the current source for the correct negative test current using Table 6.
Procedure

AM 503B and AM 5030 Performance Verification
6AM 503B, AM 5030, and A6300 Series Verification and Adjustment
Table 6: DC Gain Accuracy Calibration Test for the AM503X
AM 503B and AM 5030
Current/Division Current Source Output Test Current (It)
1 m A ±100 A 10 mA
2 m A ±200 A 20 mA
5 m A ±500 A 50 mA
10 m A ±1mA 100 mA
20 m A ±2mA 200 mA
50 m A ±5mA 500 mA
100 m A ±10 mA 1 A
200 m A ±20 mA 2 A
500 m A ±50 mA 5 A
1 A ±100 mA 10 A
2 A ±100 mA 10 A
5 A ±100 mA 10 A
f. Record the digital multimeter reading as M2.
g. Calculate the measured current (Im) using the following formula:
ImM1–M
2
0.01 (currentdivision)
For example, you might have obtained values of 51.0 mV for M1and
–53.0 mV for M2. If you are using an Amplifier setting of 10 mA/divi-
sion, you can compute Imas:
Im(51.0x10–3)–(–53.0x10–3)
0.01 (10x10–3)104 mA

AM 503B and AM 5030 Performance Verification
AM 503B, AM 5030, and A6300 Series Verification and Adjustment 7
h. Calculate the %Error between the measured current (Im) and the test
current (It) %Error as follows:
%Error +Im*It
It 100
For example, using a test current Itof 100 mA and a measured current Im
of 104 mA, the %Error would be:
%Error +104 –100
100 100 +)4%
NOTE. It is important that the correct polarity be used in order to calculate the
% error
4. Copy the work sheet in Table 7 and fill it in with required data. Calculate the
values for each New Rin Cal Constant only if adjustment is required.

AM 503B and AM 5030 Performance Verification
8AM 503B, AM 5030, and A6300 Series Verification and Adjustment
Table 7: Work Sheet for DC Gain Accuracy Calibration
AM 503B and
AM 5030
Current/
Division Current/Voltage
Source Output
Test
Current
ItM1M2
Im
(Note A) %Error
(Note B) Rin Name
Existing
Cal
Constant
(Note C)
New
Cal
Constant
(Note D)
1mA ±100 A10 mA
2mA ±200 A 20 mA
5mA ±500 A 50 mA
10 mA ±1mA 100 mA Rin1X
20 mA ±2mA 200 mA
50 mA ±5mA 500 mA
100 mA ±10 mA 1 A Rin10X
200 mA ±20 mA 2 A
500 mA ±50 mA 5 A
1 A ±100 mA 10 A Rin100X
2 A ±100 mA 10 A
5 A ±100 mA 10 A
Note A Im+M2*M1
0.01 (currentńdivision)
Note B %Error +Im*It
It 100
Note C Query amplifier for existing Rin1X, Rin10X, and Rin100X Cal Constants
(CALC? 00, CALC? 01, and CALC? 02 respectively).
Note D New Rin Cal Constant +(1 )%Error
100 ) Existing Rin Cal constant
(Calculate this value only if adjustment is required.)

AM 503B and AM 5030 Performance Verification
AM 503B, AM 5030, and A6300 Series Verification and Adjustment 9
5. Verify that the measured DC gain accuracy is within ±1.5% at all settings.
NOTE. If the % Error on any of the settings is greater than ±1.5%, you must
perform the Cal Constant loading sequence. Refer to the adjustment procedure
that begins on page 19.
DC Balance
This procedure checks the DC Balance Test of the AM 503B and AM 5030.
1. Connect a BNC cable from the AM 503B/AM 5030 amplifier OUTPUT to
the 50 feedthrough termination. Attach the termination to a BNC-to-dual
banana adapter.
2. Taking care to observe and maintain polarity, insert the dual banana adapter
into the digital multimeter DC voltage input. Refer to Figure 2.
DMM
+–
BNC to Dual
Banana Adapter
50 Termination
50 Coaxial
Cable
Amplifier in TM
Series Power
Module
Voltage Adapter
Figure 2: Setup for DC Balance
3. Connect the Voltage Adapter (015-0598-00) to the INPUT of the amplifier
and disconnect the other end of the Voltage Adapter from ALL other sources.
In other words, the BNC end of the Voltage adapter should not be connected
up to any thing.
4. Make or verify the equipment settings in Table 8.

AM 503B and AM 5030 Performance Verification
10 AM 503B, AM 5030, and A6300 Series Verification and Adjustment
Table 8: Equipment Settings for DC Balance
DigitalMultimeter
MeasurementType DC volts
Range Autoranging
AM 503B and AM 5030 Amplifier
Coupling REF
BW Limit On (20 MHz)
Current/division 1 mA/division
5. Press the PROBE DEGAUSS AUTOBALANCE button. Wait for the
degauss/autobalance routine to complete before proceeding. The routine is
complete when the indicator light turns off.
6. For each of the Amplifier settings (AC, DC, 1 mA, 2 mA, 5 mA, 10 mA,
20 mA, 50 mA, 100 mA, 200 mA, 500 mA, 1 A, 2 A, 5 A), perform the
following steps.
a. Set the amplifier to the desired setting from above.
b. Measure the exact DC voltage with the digital multimeter.
c. Verify that the measured DC voltage is less than ±2mV (0.2 divs).
RMS Noise
This procedure tests the RMS noise level of the AM 503B and AM 5030 Current
Probe Amplifier. In this test you measure the RMS voltage of the amplifier
output when the amplifier is set to the most sensitive setting and BW LIMIT is
off. Refer to Figure 4 when making equipment connections.
50 oscilloscope input (or add 50 
termination here if oscilloscope has
only high-impedance input).
Amplifier in TM
Series Power
Module
Test Oscilloscope
Voltage Adapter
Figure 3: RMS Noise Test Setup for stand alone AM 503B/AM 5030