82A04
xx
ZZZ
Phase Reference Module
User Manual
*P077034500*
077-0345-00
xx
82A04
ZZZ
Phase Reference Module
User Manual
www.tektronix.com
077-0345-00
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
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 5 0 0
Beaverto
USA
For product information, sales, service, and technical support:
n, OR 97077
In North America, call 1-800-833-9200.
Worl dwid e, visi t www.tektronix.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 t o 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 .......................................................................................... ii
Environmental Considerations ................................................................................... iv
Getting Started ..... . ... . . ..... . ..... . ... . . . .... . ..... . ..... . ... . . ..... . ..... . ... . . . .... . ..... . ..... . ... . . ..... . ..... 1
Operating B
Specifications .......... .................................. ................................ ........................... 7
asics.................................................................................................... 5
82A04 Phase Reference Module i
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
Ground the Product. This product is indirectly grounded through the grounding
conductor of the mainframe 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
ground
Observe All Terminal Ratings. To av oid fire or shock hazard, observe all ratings
and ma
information before making connections to the product.
Do no
exceeds the maximum rating o f that terminal.
ed.
t apply a potential to a ny 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
TermsinthisManual
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
Av
when powe r is p resent.
o Not Operate in Wet/Damp Conditions.
D
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
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.
ii 82A04 Phase Reference Module
General Safety Summary
Symbols and Terms on the
Product
These terms may
DANGER indicates an injury hazard immediately accessible as you read
the marking.
WARNING indicates an injury hazard not immediately accessible as you
read the mar
CAUTION indicates a hazard to property including the product.
The following symbol(s) may appear on the product:
appear on the product:
king.
82A04 Phase Reference Module iii
Environmental Considerations
Environmenta
Product End-of-Life
Handling
Restriction of Hazardous
Substances
l Considerations
This section
Observe the following guidelines when recycling an instrument or component:
Equipment R
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
recycle
This product has been classified as Monitoring and Control equipment, and is
outside the scope of the 2002/95/EC RoHS Directive.
provides information about the environmental impact of the product.
ecycling. Production of this equipment required the extraction and
d appropriately.
This symbol indicates that this product complies with the European Union’s
requirements according to Directive 2002/96/EC on waste electrical and
nic equipment (WEEE). For information about recycling options, check
electro
the Support/Service section of the Tektronix Web site (www.tektronix.com).
iv 82A04 Phase Reference Module
Getting Started
Product Description
The 82A04 Phase Reference Module extends the capability of the DSA8200
digital serial analyzer sampling oscilloscope mainframe
1
by providing extremely
low jitter/low drift sample position information to the mainframe. This sample
position information is based on the phase of a clock the user provides to the
82A04 input.
The benefits of using the sample position information based on a clock signal
are two-fold:
An extremely low jitter of <200 fs
RMS
(typical).
The possibility of a triggerless acquisition.
The typical application is the acquisition and analysis of very high speed o ptical
and electrical signals in high-speed communication devices and systems, and
similar areas.
The 82A04 together with the DSA8200 implements the phase reference timebase
functionality in a novel way, giving the user the freedom to select from timebase
and acquisition modes without compromise. Any phase-reference frequency
within the operating range is accommodated, and even the advanced features,
such as FrameScan®, rema
in available. The separate DSP per acquisition slot
architecture of the DSA8200 enables the acquisition rate in the phase reference
modetoreachover40kS/s.
1
The 82A04 Phase Reference Module is also compatible with the CSA8200 Communications Signal Analyzers
and the TDS8200 Digital Sampling Oscilloscopes.
Accessories
The following items are included with the 82A04 Phase Reference Module:
SMA 50 Ω termination, 015-1022-01
2.4 mm male to 2.92 mm (K) female adapter for connection to 3.5 mm
compatible male connectors
82A04 Phase Reference Module 1
Getting Started
Installing and Removing
the Module
Connector Care
Refer to the hos
of modules.
CAUTION. Instrument modules are extremely static sensitive. Always ground
yourself when handling modules.
Themoduleisdesignedtoinstalldirectly into any available small-module
compartment of the following Tektronix mainframes:
DSA8200
TDS8200, CSA8200
NOTE. Only one 82A04 module can be activated in a mainframe at a time.
Use extra care when attaching or removing SMA connectors. Use the following
guidelines to make proper connections:
1. Align the connectors carefully before turning the nut.
2. Use lig
t instrument documentation for proper installation and removal
ht finger pressure to make the initial connection.
3. Use a torque wrench to lightly tighten the nut as specified. (See Table 1.) Use
n-end wrench to keep the body of the device from turning.
an ope
4. Rotate only the connector nut (not the cable) that you are tightening.
5. Position the two wrenches within 90 degrees of each other before applying
force. (See Figure 1.)
6. Hold the torque wrench lightly at the end of the handle.
7. Apply downward force perpendicular to the wrench handle; this applies
torque to connection through the wrench.
8. Tighten the connection just to the point that the wrench breaks over. Do not
overtighten the connection.
2 82A04 Phase Reference Module
Getting Started
Figure 1: Using a torque wrench to tighten connectors
Table 1: Torque wrench information
Connector type Torque setting Torque tolerance
SMA 56 N-cm (5 in-lb) ± 5.6 N-cm (± 0.5 in-lb)
1.85 mm
2.4 mm
2.92 mm
3.5 mm
90 N-cm (8 in-lb) ± 9.0 N-cm (± 0.8 in-lb)
82A04 Phase Reference Module 3
Getting Started
4 82A04 Phase Reference Module
Operating Basics
Operation
The operation of the Phase Reference module is based on the acquisition of a clock
synchronous to the s ignal under observation. This clock can be a user-supplied
signal (such a s a clock from a BERT), or the Clock Output of one of the DSA8200
clock recovery or optical modules. In addition, the user can provide a traditional
external tr
input of the mainframe.
Phase Ref Free-Run. With no external trigger to the DSA8200 mainframe needed,
the 82A04 module can, together with the mainframe, create a timebase based on
the phase of the reference clock. (Effectively, the timebase of the instrument
functio
therefore repeat after one period of the reference clock. All user controls remain
enabled, even while the horizontal position has relative meaning only. The timing
information presented by the oscilloscope is based solely on the phase reference
clock frequency as entered by the user in the Input Freq field of the Phase Ref
Setup dialog box. (See page 6, Setup Controls.)
Phase Ref Triggered. When the DSA8200 mainframe is supplied with both the
reference clock and a traditional external trigger, the mainframe triggers on
the trigger signal, and uses the phase reference information from the 82A04 to
minimize the jitter. Otherwise, the acquisition process does not change from
traditional acquisition and the signal remains referenced to the trigger point.
igger signal either to the Direct Trigger input, or to the Trigger Prescaler
ns as a “Phase-base” instead). The signal displayed on the screen will
Characterize. To operate properly in either the Phase Ref Triggered or the Phase
Ref Free-Run modes, the Phase Reference module has to first Characterize
the Phase Reference signal. The signal needs to be stable during and after the
characterization. The instrument indicates when characterization is necessary.
82A04 Phase Reference Module 5
Operating Basics
Setup Controls
The controls fo
Ref setup dialog box in the mainframe. Refer to the mainframe online help for
information about the control settings.
r the 82A04 Phase Reference Module are contained in the Phase
6 82A04 Phase Reference Module
Specifications
Table 2: 82A04 electrical
Characteris
Applicable m
Phase correction capabilities
and conditi
tics
ainframes
ons
Description
DSA8200, TDS
A phase refe
equipped with the 82A04 Phase Reference Module to
provide additional phase information for signals being
acquired i
primary phase information for signals being acquired in
Free Run Phase Corrected modes. For Phase Corrected
Triggered
overlays the functionality of the basic trigger operation,
although restrictions might be imposed.
Number of phase reference
module in
puts
One per 82A04 module. Up to three 82A04 modules can
be insert
and characterized to operate with one or more vertical
sampling module(s); only one phase correction module at
atimeca
Input connector
haracteristics (typical)
Input c
Input dynamic range
lipping)
(nonc
Input maximum nondestruct
Precis
50 Ω AC c
2V
p-p
±3 V maximum
range
Input signal level
600 m
performance
Phase reference mode jitter
(typical)
Triggered and Free Run Phase Corrected Modes, 8 GHz 60 GHz clock, 600 mV - 1.8 V
ggered and Free Run Phase Corrected Modes, 2 GHz -
Tri
8 GHz sine wav e clock, 600 mV - 1.8 V
or better. The jitter increase between 8 GHz and 2 GHz is
ughly inverse proportion to clock frequency.
ro
Operation of phase reference clock at frequencies below
8 GHz with non-sinusoidal Clock signals may require an
tional filter accessory.
op
ompensation temperature
C
range (typical)
5 °C where compensation was performed. If the
±
compartment is changed on the mainframe, or if the
sampling module extender is employed, or the length
f sampling module extender is changed, the Phase
o
Reference module must be recompensated.
Input operating frequency
82A04
8GHzto25GHz
82A04-60 G 8 GHz to 60 GHz
8200, CSA8200
rence signal can be applied to a mainframe
n Triggered Phase Corrected modes and
modes, the phase correction functionality
ed in the small compartments of the mainframe
n be used.
ion 1.85 mm female connector (V)
oupled through 5 pF
(offset ±1000 mV)
V
to 1.8 V
p-p
to achieve typical specified jitter
p-p
input: 200 fs
p-p
RMS
input: 280 fs
p-p
or better.
RMS
82A04 Phase Reference Module 7
Specifications
Table 2: 82A04 electrical (cont.)
Characteristics Description
Input operating frequency
(typical)
82A04
82A04-60 G 2 GHz to 60 GHz usable range. Operation below 8 GHz
2 GHz to 25 GHz usable range
Operation below 8 GHz with a non-sinusoidal clock
typically requires the use of external filters, as follows:
2 GHz to 4 GHz: requires 2.2 GHz peaked lowpass
filter kit, Tektronix part number 020-2566-00.
4 GHz to 6 GHz: requires 4 GHz lowpass filter kit,
Tektronix kit part number 020-2567-00
6 GHz to 10 GHz: requires 6 GHz filter lowpass filter
kit, Tektronix kit part number 020-2568-00
2 GHz to 25 GHz settable range
may require the use of external filters as noted for the
standard 82A04
2 G Hz to 110 GHz settable range
Table 3: 82A04 mechanical and environmental
cteristics
Chara
Weight
Dimensions
Height
Width
Depth
Environmental conditions
Electromagnetic compatibility
iption
Descr
g (13 oz)
0.4 k
25 mm (1.0 in)
79 mm (3.1 in)
135 mm (5.3 in)
Refer to the host instrument specifications.
Refer to the host instrument specifications.
Table 4: Mainframe system timebase
Characteristics Description
Mainframe horizontal modes
Mainframe sampling rate,
phase corrected modes
Mainframe horizontal position
range
Free Run and Triggered Modes are supported
DC to 50 kHz maximum, one channel. If the trigger rate is
less than the maximum, or the requested holdoff exceeds
the minimum, then the trigger rate and / or holdoff will dictate
sampling rate.
Range is determined by the following formula where (f)
equals the frequency of the reference clock
8 82A04 Phase Reference Module
Table 4: Mainframe system timebase (cont.)
Characteristics Description
Mainframe timing accuracy,
free run phase corrected
mode
Mainframe timing accuracy,
triggered phase corrected
mode
Mainframe horizontal deskew
range and resolution
Maximum timing deviation 0.1% of phase reference signal
period, typical, relative to phase reference signal
Assumes that phase reference frequency has been correctly
entered. Operation of phase reference clock at frequencies
requiring extended bandwidth or signal conditioning may
require an instrument option.
Maximum timing deviation relative to phase reference signal:
0.2% of the phase reference signal period typical for
measurements made >40 ns after trigger event
0.4% of the phase reference signal period typical for
measurements made ≤40 ns after the trigger event
Assumes that phase reference frequency has been
correctly entered
Operating in Triggered Phase Corrected modes: -500 ps to
+100 ns on any individual channel in 1 ps increments
Operating in Free Run Phase Corrected modes: D eskew
range extends over the full clock cycle of the phase
reference
Specifications
Table 5: Mainframe system trigger
Characteristics Description
Trigger sources
A phase reference signal may be applied to the instrument,
equipped with an 82A04 Phase Reference Module,
when
to provide additional phase information for signals being
acquired in Triggered Phase Corrected modes and primary
se information for signals being acquired in Free Run
pha
Phase Corrected modes.
Two bandwidth options are available for the 82A04 module
may be required o ver specific frequency ranges of
and
operation:
The base product has an 8 GHz to 25 GHz range of
eration
op
Option 60 G extends the upper frequency range of
operation to 60 GHz
82A04 Phase Reference Module 9
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