xx
P7600 Series
ZZZ
TriMode™ Probes
Technical Reference
*P077068003*
077-0680-03
xx
P7600 Series
ZZZ
TriMode™ Probes
Technical Reference
www.tek.com
077-0680-03
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.
TriMode is a trademark of Tektronix, Inc.
Velcro is a registered trademark of Velcro Industries B.V.
G3PO is a trademark of Corning Gilbert Inc.
Contacting Tektronix
Tektroni
14150 SW Karl Braun Drive
P.O . Bo x 5 00
Beaverton, OR 97077
USA
For pro
x, Inc.
duct information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tek.com to find contacts in your area.
Warranty
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 n
the property of Tektronix.
ew or reconditioned to like new performance. All replaced parts, modules and products become
In order to o
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
result
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.
TRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE
TEK
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.
[W2 – 15AUG04]
btain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
ing from attempts by personnel other than Tektronix representatives to install, repair or service the product;
Table of Contents
General safety summary ............ .................................. ................................ ............ iv
Preface ............................................................................................................. vii
Theory of Operation........................... ................................ ................................ ..... 1
Introducti
TriMode Operation ............. ................................ ................................ ............... 6
Operating Voltages............................................................................................. 8
Input Impedance and Probe Loading ............. ................................ .......................... 14
Scale Factor ................................................................................................... 16
Probing Techniques to Maximize Measurement Fidelity . . ... ... ... . .. . ... ... . .. . ... ... ... . ... ... ... . ... 17
Referen
Single-Ended Measurements Using A and B Modes ..................... ................................ 23
Differential Measurements................................................................................... 24
Specifications ................................ ................................ ................................ ...... 27
Warranted Characteristics.................................................................................... 27
Typical Characteristics ............. ................................ ................................ .......... 29
Nomi
User Service ........................................................................................................ 35
Error Condition .. ... ... ... ... . .. . ... ... ... . ... ... ... ... . .. . ... ... ... . ... ... ... ... . .. . ... ... ... . ... ... ... . . .. . . 35
Replaceable Parts ............................................................................................. 35
Preparation for Shipment ............................ ................................ ........................ 41
Index
on............................ .................................. ................................ ....... 1
ce ........................................................................................................... 23
nal Characteristics...................................................................................... 34
P7600 Series TriMode Probes Technical Reference i
Table of Contents
List of Figure
Figure 1: Adapters for the P7600 Series probes ........................... ................................ ..... 3
Figure 2: Pr
Figure 3: TriMode input structure ................................................................................ 7
Figure 4: Typical TriMode Probe Setup screen . .................................. ............................. 7
Figure 5: Probe inputs .. ................................ ................................ ........................... 8
Figure 6: Operating voltage window ............................................................................ 9
Figure 7: Dynamic range versus linearity ............ ................................ .......................... 10
Figure 8:
Figure 9: Probe Setup screen..................................................................................... 12
Figure 10: TriMode probe coaxial input model.......... ................................ ...................... 14
Figure 11: P76TA adapter simplified schematic ............................................................... 15
Figure 12: P76TA adapter and P75PST tip equivalent schematic.... ................................ ........ 15
Figure 13: Preventing twist to the coaxial input cables ................. ................................ ...... 17
Figur
Figure 15: Solder ramp installed......................... ................................ ........................ 18
Figure 16: Typical wire length from probe tip to circuit...................................................... 20
Figure 17: P75TLRST solder tip with 0.010 in. of tip wire .................................................. 21
Figure 18: P75TLRST solder tip with 0.050 in. of tip wire .................................................. 21
Figure 19: P75TLRST solder tip with 0.100 in. of tip wire .................................................. 22
gure 20: P75TLRST solder tip with 0.200 in. of tip wire .................................................. 22
Fi
Figure 21: Simplified model of a differential amplifier ....................................................... 24
Figure 22: Typical CMRR . .................................. ................................ .................... 25
Figure 23: Typical channel isolation ............................................................................ 26
Figure 24: Typical rise time ...................................................................................... 31
Figure 25: Typical frequency response........................ .................................. ................ 31
Figure 26: Probe body and control box dimensions ........................................................... 32
Figure 27: P7600 Series Probe adapter dimensions ........................................................... 33
Figure 28: P75PST and P75TLRST solder tip dimensions ................................................... 33
Figure 29: Removing the bullets................................................................................. 37
Figure 30: Installing the bullets. . .. . ... ... ... . ... ... ... .. .. . ... ... ... . ... ... ... .. .. . ... ... ... . ... ... ... .. .. . ... .. 38
obe Tip Selection screen.................... .................................. ....................... 4
Termination voltage operating range ........................ .................................. ...... 11
e 14: P75PST and P75TLRST TriMode Solder Tips.......................... .......................... 18
s
ii P7600 Series TriMode Probes Technical Reference
List of Tables
Table 1: Offset ranges......... ................................ ................................ .................... 23
Table 2: War
Table 3: Warranted environmental characteristics..... .................................. ...................... 29
Table 4: Typical electrical characteristics. ................................ ................................ ...... 29
Table 5: Typical mechanical characteristics.................................................................... 30
Table 6: Nominal electrical characteristics ........... ................................ .......................... 34
Table 7: Nominal adapter electrical characteristics...................... ................................ ...... 34
Table 8: T
Table 9: Required equipment............... .................................. ................................ .... 35
ranted electrical characteristics ......... ................................ .......................... 27
riMode probes replaceable parts ....................... ................................ .............. 35
Table of Contents
P7600 Series TriMode Probes Technical Reference iii
General safety summary
General safet
To avoid fire or personal
injury
ysummary
Review the fo
this product or any products connected to it.
To avoid pot
Only qualified personnel should perform service procedures.
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 r
Connect and disconnect properly. Connect the probe output to the measurement
instrument before connecting the probe to the circuit under test. Connect the
probe reference lead to the circuit under test before connecting the probe input.
Disconnect the probe input and the probe reference lead from the circuit under test
before
Observe all terminal ratings. To avoid fire or shock hazard, observe all ratings
and ma
information before making connections to the product.
Do no
exceeds the maximum rating of that terminal.
disconnecting the probe from the measurement instrument.
t apply a potential to any terminal, including the common terminal, that
llowing safety precautions to avoid injury and prevent damage to
ential hazards, use this product only as specified.
elated to operating the system.
rkings on the product. Consult the product manual for further ratings
ot operate without covers. Do not operate this product with covers or panels
Do n
removed.
ot operate with suspected failures. If you suspect that there is damage to this
Do n
product, have it inspected by qualified service personnel.
oid exposed circuitry. Do not touch exposed connections and components when
Av
power is present.
o not operate in wet/damp conditions.
D
Do not operate in an explosive atmosphere.
Keep product surfaces clean and dry.
iv P7600 Series TriMode Probes Technical Reference
General safety summary
Terms in this manual
Symbols and terms on the
product
These terms may
WAR N ING. 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 in
the marking.
WAR NI NG
read the marking.
CAUTIO
The following symbol(s) may appear on the product:
appear in this manual:
dicates an injury hazard immediately accessible as you read
indicates an injury hazard not immediately accessible as you
N indicates a hazard to property including the product.
P7600 Series TriMode Probes Technical Reference v
General safety summary
vi P7600 Series TriMode Probes Technical Reference
Preface
This manual discusses topics that are not covered in depth in the P7600 Series
TriMode Probes Quick Start User Manual.
The main sections are:
Theory of Operation — Contains probe details not covered in the user manual.
Reference — Contains information about differential measurements and how
to increase measurement accuracy.
Specifications — Contains warranted, typical, and nominal characteristics for
the probe, probe adapters and probe tip accessories.
User Service — Describes troubleshooting and probe maintenance.
P7600 Series TriMode Probes Technical Reference vii
Preface
viii P7600 Series TriMode Probes Technical Reference
Theory of Operation
This section discusses operating considerations and probing techniques. For more
detailed information a bout differential measurements and TriMode operation,
refer to Refe
Introduction
rence. (Seepage23.)
Probe Components
The P7600 S
MSO/DPO70000DX, and DPO/DSA70000D series oscilloscopes. These
oscilloscope models feature an extended-bandwidth version of the TekConnect
probe interface designed to support bandwidths up to 33 GHz. The P7600 Series
probes contain probe-specific S-parameter data that, when transferred to the host
oscilloscope after the initial connection is made, create unique system DSP filters.
The P7600 Series probes are optimized for high bandwidth; they are not
general-purpose probes. The P7500 Series probe solder tips that can be used
with th
circuitry, and must be handled carefully.
The probes are comprised of a control box, an active probe head, and an
connect cable that transfers measured signals, power, and control signals
inter
between the control box and probe head. An optional adapter is required on the
probe head to make the final connection to the DUT (device under test).
Control box. The probe control box assembly mates to the host instrument
through an extended-bandwidth, 33 GHz TekConnect probe interface. The control
includes a membrane toggle switch to select the TriMode input mode:
box
Differential (A–B)
eries TriMode Probes are designed for use with DPO70000SX,
e probes are miniaturized for electrical characteristics and acce ss to dense
A input (single-ended to ground)
B input (single-ended to ground)
Common-mode (A+B/2 to ground)
The probe input mode can also be selected using the host oscilloscope Probe
Control menu.
LEDs on the control box front and top panels indicate the selected input mode.
Another LED on each panel indicates when an overload condition exists.
Overloads are caused when parameters such as input voltages or termination
voltage driver currents exceed the safe limits of the probe.
P7600 Series TriMode Probes Technical Reference 1
Theory of Operation
A mechanical la
instrument during use. The thumbscrew is only intended to be finger-tightened,
and is machined to prevent tools from being used to over-torque it. To remove
the probe, loosen the thumbscrew counterclockwise, depress the latch button to
release the probe, and then pull out the probe.
CAUTION. To prevent damage to the probe, use care when handling the probe.
Rough or car
Interconnect cable. This cable consists of a low-loss coaxial signal cable that
carries t
includes a 20-conductor bundle of wires that supply probe head power and control
signals from the control box. Some of the wires carry bidirectional data, such as
queries and responses about the type of probe adapter that is attached to the probe
head, and other probe-specific information.
Probe h
and other support circuitry that precondition the acquired signals. It connects to
the optional coaxial and solder tip adapters through a connector that, like the
interconnect cable, carry signal, control and power signals.
The probe head is intended to be placed close to the DUT test point, within the
final few inches (6 inches or less, for best performance), made with the optional
coaxial and solder tip adapters.
he acquired signal from the probe head to the control box. The cable also
ead. The probe head is an active component that houses an amplifier
tch and retention thumbscrew hold the probe securely to the
eless use can damage the probe.
pters. The P7600 Series probes require an optional TriMode adapter to
Ada
complete the connection between the probe and your circuit. (See Figure 1 on
page 3.) The adapters connect the probe to your circuit through 2.92 mm or SMP
coaxial cables. For soldered, in-circuit connections, the connection is made
through P7500 Series solder tips, such as the P75PST Performance Solder Tip.
There are several different coaxial tips available for the probes, which differ only
in the tip connector type or the tip cabling. All of the coaxial tips provide a 50
ohm transmission line signal path from its input connector to the termination
resistor at the probe amplifier input.
The adapter inputs are polarized, with the A input marked in red and the B input
marked in black. All of the adapters are secured to the probe head with a 2 mm
hex screw. Although the adapters can be “hot-plugged” (with the probe connected
to the oscilloscope and powered on), the adapters should first be connected to
the probe before the probe is connected to the instrument. This ensures a good
power-on sequence for both the probe and attached adapter. After the probe
is powered on with an attached adapter, data is transferred from the adapter,
identifying it to the probe and oscilloscope.
2 P7600 Series TriMode Probes Technical Reference
Figure 1: Adapters for the P7600 Series probes
1. P76CA-292: 2.92 mm Coax Adapter
Theory of Operation
2. P76CA-292C: 2.92 mm Coax Adapter with cables
3. P76CA-S
4. P76TA: P7500 TriMode Solder Tip Adapter (shown with P75PST
Perfor
Use the P76CA-292 adapter with high bandwidth, low skew (<2 ps) cable pairs
ave short (<6 in) lengths and high-quality male 2.92 mm connectors at the
that h
probe end. The other end of the cables can be customized with connectors that
mate to your circuit.
MP: SMP Coax Adapter with cables
mance Solder Tip)
P7600 Series TriMode Probes Technical Reference 3
Theory of Operation
P7500 Series so
soldered connections to the DUT. You must manually choose the solder tip that
you are using in the Probe Tip Selection screen. (See Figure 2.) This enables the
correct DSP filtering to be used for your measurements. Maximum probe solder
tip performance is only provided by the P75PST Performance Solder Tip.
Figure 2
: Probe Tip Selection screen
lder tips. These tips are used with the P76TA adapter to make
4 P7600 Series TriMode Probes Technical Reference
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