Tektronix TCA-1MEG Instruction Manual
Instruction Manual
TCA
-1MEG
High Impedance Buffer Amplifier
071-1010-01
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.
www.tektronix.com
Copyright © Tektronix, Inc. 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 supercedes that in all previously
published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered tradem arks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
H In North America, call 1-800-833-9200.
H Worldwide, visit www.tektronix.com to find contacts in your area.
Warranty 2
Tektronix warrants that this product will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If any such 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. 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, with shipping charges
prepaid. 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.
Table of Contents
General Safety Summary v..............................
Service Safety Summary vii..............................
Environmental Considerations ix.........................
Preface xi............................................
Manual Structure xi....................................
Manual Conventions xii.................................
Getting Started 1.....................................
Product Description 1..................................
Accessories 3........................................
Input Voltage Derating 4................................
Probe Calibration for High Accuracy 4....................
Functionality Not Supported 5..........................
Installation 6........................................
Connecting the TCA-1MEG to the Host Instrument 6........
Connecting a Probe to the TCA-1MEG 8..................
Attaching and Grounding a TCA-1MEG System 9...........
Functional Overview 10.................................
Cleaning 12...........................................
Functional Checks 13..................................
Prerequisites 13........................................
Required Equipment 14.................................
Run the SPC (Signal Path Compensation)
on the Host Instrument 16.............................
Calibrate the TCA-1MEG to the Host Instrument 16..........
Calibrate the P6139A Passive Volt age Probe to the
TCA-1MEG and Host Instrument 18....................
LF Probe Compensation 20..............................
Check Vertical Input Coupling 23.........................
Check Bandwidth Limit 27..............................
Specifications 31......................................
Performance Verification 41............................
TCA-1MEG System Bandwidth 42........................
Replaceable Parts 47...................................
Parts Ordering Information 47............................
Using the Replaceable Parts List 48........................
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
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Table of Contents
List of Figures
Figure 1: TCA-1MEG High Impedance Buffer Amplifier 1....
Figure 2: Connecting and disconnecting the TCA-1MEG 7....
Figure 3: Calibration data message 7......................
Figure 4: TekConnect and TEKPROBE Interface features 10....
Figure 5: Simplified block diagram 11.....................
Figure 6: Probe Compensation Output of the TDS6604 15......
Figure 7: Setup with the P6139A attached to the TCA-1MEG 21
Figure 8: Probe compensation waveforms 22................
Figure 9: Test equipment hookup for the Vertical
Input Coupling and Bandwidth Limit checks 23...........
Figure 10: Typical waveform at GND 24....................
Figure 11: Typical waveform at AC Coupling 25.............
Figure 12: Typical waveform at DC Coupling 26.............
Figure 13: Typical waveform at Full (500 MHz) bandwidth 28..
Figure 14: Typical waveform at 100 MHz bandwidth 29.......
Figure 15: Typical waveform at 20 MHz bandwidth 30........
Figure 16: Typical Input Impedance and Phase
versus Frequency 33.................................
Figure 17: Voltage Derating versus Frequency 34.............
Figure 18: TCA-1MEG dimensions 35.....................
Figure 19: TCA-1MEG System Bandwidth equipment hookup 42
Figure 20: TCA-1MEG replaceable parts 50.................
Figure 21: TCA-1MEG optional accessories 52..............
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TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
List of Tables
Table 1: Compatible devices that require high impedance input 2
Table 2: Required equipment 14..........................
Table 3: Warranted electrical specifications 31..............
Table 4: Typical electrical characteristics 32................
Table 5: Physical characteristics 35.......................
Table 6: Environmental characteristics 35..................
Table 7: Certifications and compliances 36.................
Table 8: Equipment required for performance verification 41...
Table of Contents
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
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Table of Contents
iv
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
General Safety Summary
Review the following safety precautions to avoid injury and prevent
damage to this product or any products connected to it. To avoid
potential hazards, use this product only as specified.
Only qualified personnel should perform service procedures.
To Avoid Fire or Personal Injury
Connect and Disconnect Properly. Connect the TCA-1MEG amplifier to
the host instrument, then connect the probe or other input device to
the TCA-1MEG. Connect the probe or other input device to the
device-under-test.
Before disconnecting the TCA-1MEG from the host instrument,
disconnect the probe or other input device, and the probe ground,
from the device-under-test, and then disconnect the probe or other
input device from the TCA-1MEG amplifier.
Ground the Product. This product is indirectly grounded through the
grounding conductor of the host instrument 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.
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.
The common terminal is at ground potential. Do not connect the
common terminal to elevated voltages.
Connect the ground lead of the probe to earth ground only.
Do Not Operate With Suspected Failures. If you suspect there is damage
to this product, have it inspected by qualified service personnel.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
v
General Safety Summary
Provide Proper Ventilation. Refer to the manual’s installation
instructions for details on installing the product so it has proper
ventilation.
Safety Terms and Symbols
Terms in This Manual. 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 c onditions or practices that
could result in damage to this product or other property.
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.
Symbols on the Product. These symbols may appear on the product:
CAUTION
Refer to Manual
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TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
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 Service Alone. Do not perform internal service or adjustments
of this product or host instrument unless another person capable of
rendering first aid and resuscitation is present.
Disconnect Power. To avoid electric shock, switch off the host
instrument power, then disconnect the host instrument power cord
from the mains power.
Use Care When Servicing with Power On. Dangerous voltages or currents
may exist in this product and host instrument. 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.
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
vii
Service Safety Summary
viii
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
Environmental Considerations
Product End-of-Life Handling
Observe the following guidelines when recycling an instrument or
component:
Equipment Recycling. Production of this equipment required the
extraction and use of natural resources. The equipment may contain
substances that could be harmful to the environment or human health
if improperly handled at the product’s end of life. In order to avoid
release of such substances into the environment and to reduce the use
of natural resources, we encourage you to recycle this product in an
appropriate system that will ensure that most of the materials are
reused or recycled appropriately.
The symbol shown to the left indicates that this
product complies with the European Union’s
requirements according to Directive 2002/96/EC
on waste electrical and electronic equipment
(WEEE). For information about recycling
options, check the Support/Service section of the
Tektronix Web site (www.tektronix.com).
Restriction of Hazardous Substances
This product has been classified as Monitoring and Control
equipment, and is outside the scope of the 2002/95/EC RoHS
Directive. This product is known to contain lead, cadmium, mercury,
and hexavalent chromium.
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
ix
Environmental Considerations
x
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
Preface
This is the Instruction manual for the TCA-1MEG High Impedance
Buffer Amplifier. Read this preface to learn how this manual is
structured and what conventions it uses. Before using this manual or
the TCA-1MEG amplifier, read the Gene ral Safety Summary and
Service Safety Summary sections at the beginning of this manual for
safety and other important background information.
Manual Structure
This manual is divided into sections, which are made of related
topics:
H Getting Started includes a product description, list of accessories,
and instructions for installation.
H Functional Checks includes procedures for verifying that the
TCA-1MEG functions properly with a host instrument.
H Specifications includes warranted electrical specifications, typical
electrical characteristics, and graphs for typical input impedance,
and typical bandwidth.
H Performance Verification includes a procedure for verifying
warranted electrical specifications.
NOTE. Service software for this instrument is included on the
TDS Applications CD ROM (Tektronix part number 063--3376--XX)
for your host instrument, and is also available for download from the
Tektronix Web site.
Be sure to read the introductory text for each procedure. These
introductions provide important information needed to use the
TCA-1MEG High Impedance Buffer Amplifier correctly, safely, and
efficiently.
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
xi
Preface
Manual Conventions
The following conventions are used in this manual:
Safety
Symbols and terms related to safety appear in the Service Saf ety
Summary found at the beginning of this manual.
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TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
Getting Started
Product Description
The TCA-1MEG is a High Impedance Buffer Amplifier system that
broadens the functionality of a TekConnect host instrument. Features
include:
H Input impedance — 1 MΩ,10pF
H Bandwidth — 500 MHz
H Bandwidth limit (selectable) — Full (500 MHz), 100 MHz,
and20MHz
H Input coupling (selectable) — AC, DC, and GND
H Input Connection—1MΩ TEKPROBE BNC
The TCA-1MEG amplifier, or other Tektronix TekConnect probes
and adapters, enable you to easily configure each channel of your
host instrument for the input characteristics you require.
To achieve a 1 MΩ system when you need it, use this amplifier to
connect a Tektronix 1 MΩ TEKPROBE BNC probe or other standard
1MΩ BNC accessory to your 50 Ω TekConnect host instrument. To
regain your high-speed, 50 Ω signal path, simply replace the
TCA-1MEG with a high performance TekConnect probe or adapter.
Figure 1: TCA-1MEG High Impedance Buffer Amplifier
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
1
Getting Started
Table 1 lists Tektronix high-voltage passive probes, high-voltage
active probes, current probes, and other measurement analysis tools
that require high impedance input. Use these devices with the
TCA-1MEG to extend the use of your TekConnect host instrument.
Table 1: Compatible devices that require high impedance input
Device type Model Description
Passive voltage probes P6101B 15 MHz, 1X, passive
High voltage probes P6015A 20 kV, 1000X, 75 MHz,
P6139A 500 MHz, 10X, passive
passive
P5100 2.5 kV, 100X, 250 MHz,
passive
P5205 1.3 kV, 100 MHz, active
differential
P5210 4.4 kV, 50 MHz, active
differential
Micro-volt differential probe ADA400A 100X / 10X / 1X / 0.1X
preamplifier
Current probes P6021 AC, 15 A
P6022 AC, 6 A
,60MHz
p-- p
, 120 MHz
p-- p
AM503S AC/DC current amplifier
measurement system
Others Tektronix
part number
50 Ω BNC-to-BNC coaxial
cable
012--0057--01
Tektronix
part number
50 Ω feed through termination
011--0049--02
Tektronix
part number
50 Ω BNC-to-BNC coaxial
cable, male to male
012--0482--00
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TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
Accessories
The TCA-1MEG amplifier package has a set of standard accessories.
Standard Accessories for the TCA-1MEG
H P6139A 10X Passive Probe with standard accessories and
Instructions
H Certificate of Traceable Calibration
H TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
(Tektronix part number 071-1010-XX)
H TDS6000 Series Product Software (Tektronix part number
063-3541-XX), also available on the Tektronix Web site
H TDS7000 Series Product Software (Tektronix part number
063-3461-XX), also available on the Tektronix Web site
Optional Accessories for the TCA-1MEG
Service software for the TCA-1MEG is included on the TDS Applications Software CDfor your host instrument. The CD is also
available as an optional accessory for the TCA-1MEG (Tektronix
part number 063-3376-XX). The software is also available for
download from the Tektronix Web site. The Tektronix website
provides up-to-date firmware and software upgrades.
Getting Started
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
3
Getting Started
Input Voltage Derating
The TCA-1MEG is designed to be used in a high voltage environment. However, voltage input rating decreases as the frequency of
the applied signal increases. Refer to Table 3 on page 31 of the
Specifications section for input voltage rating, and Figure 17 on
page 34 for voltage versus frequency derating information.
Probe Calibration for High Accuracy
To ensure high accuracy, a probe calibration routine is recommended
for the TCA-1MEG:
H When the ambient temperature changes by more than 5
°F) from the temperature of the previous calibration
(41
H When you install the TCA-1MEG on a host instrument channel
where it has not been calibrated previously
Refertopage16oftheFunctional Checks section for the probe
calibration procedure.
Probes or adapters with the following characteristics will not
calibrate using the internal calibration signal of the TekConnect host
instrument:
H Probes or adapters without TEKPROBE readout capabilities
H Probes with attenuation levels greater than 20X, due to the low
signal level at the output of the internal calibration generator
°C
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TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
Functionality Not Supported
50 Ω Termination at BNC input:
The TCA-1MEG amplifier does not provide a 50 Ω termination at its
BNC input. If you require 50 Ω termination for your applications,
use a Tektronix TekConnect 50 Ω adapter (TCA-BNC, TCA-SMA,
or TCA-N) in place of the TCA-1MEG. When the host instrument
detects an incompatible device connected to the TCA-1MEG, it
displays a message that an incompatible combination of accessories
has been installed. The host instrument, however, will not detect all
incompatible devices.
Readout and Power Connection Pins
The BNC connector of the TCA-1MEG is not compatible for use
with nonTektronix probes, cables, and adapters that have readout or
power connection pins.
CAUTION. To avoid damage to your equipment, do not use the
TCA-1MEG with nonTektronix probes, cables, and adapters that have
readout or power connection pins.
Getting Started
TCA-1MEG High Impedance Buffer Amplifier Instruction Manual
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