Tektronix WFM91D, WFM90D Service Manual
Service Manual
WFM90D and WFM91D
Handheld Waveform, Vector,
Picture, and Audio Monitor
071-1143-01
This document applies to firmware version 2.13
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.
www.tektronix.com
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 cha nge privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
WARRANTY
Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If a product proves defective during this
warranty period, Tektronix, at its option, either will repair the defec tive product without charge for parts and labor,
or will provide a replacement in exchange for the defective product.
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 locate d. C ustomer 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 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
Specifications
Operating Information
General Safety Summary vii...................................
Service Safety Summary ix....................................
Preface xi...................................................
About This Manual xi...............................................
Related Manuals xi.................................................
Contacting Tektronix xii.............................................
Product Description 1--1..............................................
Characteristics Tables 1--2.............................................
Electrical Specifications 1--2...........................................
Physical Characteristics 1--8...........................................
Environmental Characteristics 1--8......................................
Certifications and Compliances 1--9.....................................
Installation 2--1...............................................
Mechanical Installation 2--1...........................................
Electrical Installation 2--4.............................................
Functional Overview 2--7.......................................
Keypad Controls 2--7.................................................
Side-Panel Connectors and Switches 2--10.................................
Onscreen Readouts 2--12...............................................
Using the Menus 2--15...........................................
Operating Menus 2--17................................................
Configuration Menu 2--21..............................................
Line Select Menu 2--26................................................
Theory of Operation
Input Board 3--1.....................................................
SDI Interface Board 3--1..............................................
Top Boa rd 3-- 2......................................................
Bottom Board 3--2...................................................
LCD Display and Backlight (Serial Numbers B020100 and Above) 3--2........
LCD Display and Backlight (Serial Numbers Below B020100) 3--2............
Performance Verification
Summary Verification 4--2.............................................
Equipment Required 4--3..............................................
Performance Verification: Analog Section 4--5.....................
Sync Separation 4--5.................................................
Sweep Timing and Integral Linearity 4--6................................
Vertical Gain and Vertical Magnifier Registration 4--7.......................
WFM90D and WFM91D Service Manual
i
Table of Contents
Adjustment Procedures
Variable Gain Range and Vertical Position Range 4--7.......................
Overscan 4--8.......................................................
Input and DC Restorer Frequency Response 4--9...........................
Vector Phase Stability 4--11.............................................
Chrominance Bandwidth 4--12..........................................
Audio Gain and Frequency Response 4--13................................
Performance Verification: Digital Section 4--15......................
Check Sync Separation 4--15............................................
Check Frequency Response 4--16........................................
Check Frequency Response at X5 Gain 4--17...............................
Adjustments 5--1..............................................
Summary Adjustment 5--1.............................................
Equipment Required 5--2..............................................
Adjustment Procedures 5--3............................................
Adjustment Procedures: Analog Section 5--5.......................
Raster VCO 5--5.....................................................
Sweep Timing and Horizontal Mag Registration 5--5........................
Vertical Gain and X5 Gain Registration 5--7...............................
Frequency Response 5--7..............................................
Vector Quadrature Phase 5--9..........................................
VectorGainandX5GainPhase 5--9.....................................
Audio Gain 5--10.....................................................
Adjustment Procedures: Digital Section 5--11.......................
Vertical Gain 5--11....................................................
Frequency Response 5--12..............................................
VectorGainandX5GainPhase 5--12.....................................
Cable Margin 5--13...................................................
Maintenance
ii
Cleaning 6--1.......................................................
After Repair Adjustments 6--2..........................................
Repackaging Instruct ions 6--2..........................................
Remove and Replace 6--3.......................................
Tools Required 6--3..................................................
Procedures 6--4......................................................
Top Cover Assembly 6-- 5.............................................
LCD Display Assembly 6--7...........................................
Top Board Assembly 6--15.............................................
Battery Cover Assembly 6--25...........................................
Batteries 6 -- 28.......................................................
Bottom Cover Assembly 6-- 31..........................................
Troubleshooting Procedures 6--39.................................
Equipment Required 6--39..............................................
Battery-Fault Analysis 6--40............................................
Low-Voltage Power Supply 6--42........................................
Fault Symptom Table 6--43.............................................
Troubleshooting Flowcharts 6--44........................................
WFM90D and WFM91D Service Manual
Connector Diagram 6--59..............................................
Options
Options 7--1........................................................
Accessories 7--2.....................................................
Replaceable Mechanical Parts
Replaceable Parts List 8--1......................................
Parts Ordering Information 8--1.........................................
Using the Replaceable Parts List 8--2....................................
Diagrams
Diagrams 9--1.................................................
Table of Contents
WFM90D and WFM91D Service Manual
iii
Table of Contents
List of Figures
Figure 2--1: Installing the viewing hood 2--2.......................
Figure 2--2: Installing the desk stand 2--2..........................
Figure 2--3: Packing the Option 33 travel case 2--3..................
Figure 2--4: Removing the NiMH battery pack 2--5.................
Figure 2--5: Inside of the battery compartment, showing
polarity markings 2--6......................................
Figure 2--6: WFM90D keypad 2--8...............................
Figure 2--7: WFM90D and WFM91D side panels 2--11...............
Figure 2--8: Onscreen readout messages 2--12.......................
Figure 2--9: Waveform and Vector menus 2--15......................
Figure 2--10: Audio, Picture, and Waveform-in-Picture menus 2--16....
Figure 2--11: Line Select menu 2--16...............................
Figure 2--12: Configuration menu 2--22............................
Figure 3--1: Simplified block diagram
(serial numbers B020100 and above) 3--3......................
Figure 3--2: Simplified block diagram
(serial numbers below B020100) 3--4..........................
Figure 4--1: --3 dB marks on the vector graticule 4--12................
Figure 5--1: NTSC graticule showing the vector gain adjustment 5--10..
Figure 6--1: Removing the top cover 6--6..........................
Figure 6--2: Removing the cables from the LCD DIsplay assembly 6--9.
Figure 6--3: LCD Display assembly feet 6--10........................
Figure 6--4: Installing the LCD display cable 6--12...................
Figure 6--5: Installing the LCD display 6--13........................
Figure 6--6: Installing the keypad 6--16............................
Figure 6--7: Installing the Top board shield 6--18....................
Figure 6--8: Installing the Bottom board 6--20.......................
Figure 6--9: Installing the SDI Interface board 6--21..................
Figure 6--10: Removing the Backlight board 6--23...................
Figure 6--11: Installing the battery cover 6--26.......................
Figure 6--12: Removal and replacement of the turnlock stud 6--27......
Figure 6--13: Removing the NiMH battery pack 6--29................
Figure 6--14: Installed polarity of alkaline batteries 6--30.............
iv
WFM90D and WFM91D Service Manual
Table of Contents
Figure 6--15: Battery contact installation alignment 6--32.............
Figure 6--16: Battery power-wire and turnlock stud receptacle
installation 6--33............................................
Figure 6--17: Battery orientation marker position 6--36...............
Figure 6--18: Installing the EMI suppressor 6--37....................
Figure 6--19: Testing the battery charging circuit 6--40................
Figure 6--20: Flowchart for no display 6--45........................
Figure 6--21: Flowchart for distorted waveform display 6--46..........
Figure 6--22: Flowchart for no vector display 6--47...................
Figure 6--23: Flowchart for problems processing serial digital
input signals 6--48...........................................
Figure 6--24: Flowchart for bad audio display 6--49..................
Figure 6--25: Flowchart for no picture display 6--50..................
Figure 6--26: Flowchart for bad graticules and menus 6--51...........
Figure 6--27: Flowchart for all white display 6--52...................
Figure 6--28: Flowchart for untriggered waveform display 6--53........
Figure 6--29: Flowchart for unlocked vector display 6--54.............
Figure 6--30: Flowchart for vector display jitter 6--55.................
Figure 6--31: Flowchart for distorted vectors 6--55...................
Figure 6--32: Flowchart for problems with the instrument
controls 6--56...............................................
Figure 6--33: Flowchart for bad menus in the picture display 6--57.....
Figure 6--34: Flowchart for dim or blotchy display 6--58..............
Figure 6--35: Flowchart for bad displays except Picture mode 6--58.....
Figure 6--36: Circuit board connector and pin locations 6--59..........
Figure 8--1: Exploded view (serial numbers B020100 and above) 8--4..
Figure 8--2: Exploded view (serial numbers below B020100) 8--7......
Figure 9--1: Interconnect diagram for instruments with
serial numbers B020100 and above 9--1........................
Figure 9--2: Interconnect diagram for instruments with
serial numbers below B020100 9--2............................
WFM90D and WFM91D Service Manual
v
Table of Contents
List of Tables
Table 1--1: Vertical deflection system 1--2.........................
Table 1--2: DC restoration 1--4...................................
Table 1--3: Audio mode 1--5.....................................
Table 1--4: Horizontal deflection system 1--5......................
Table 1--5: Vector mode 1--6....................................
Table 1--6: Synchronization 1--7.................................
Table 1--7: Power source 1--7...................................
Table 1--8: Physical characteristics 1--8..........................
Table 1--9: Environmental characteristics 1--8.....................
Table 1--10: Certifications and Compliances 1--9...................
Table 2--1: Video readout messages 2--13...........................
Table 2--2: Waveform menu choices, analog and digital 2--18..........
Table 2--3: Vector menu choices, analog and digital 2--18.............
Table 2 --4: Audio menu choices 2--19..............................
Table 2--5: Picture menu choices, analog and digital 2--19............
Table 2--6: WIP menu choices, analog and digital 2--20...............
Table 2--7: Configure menu choices 2--23..........................
Table 2 --8: Default instrument settings 2--25........................
Table 2 --9: Line Select menu choices 2--26..........................
T able 4--1: Summary verification procedure 4--2...................
Table 4 --2: Equipment required for performance verification 4--3.....
T able 5--1: Summary adjustment 5--1............................
Table 5 --2: Equipment required for adjustments 5--2...............
Table 6--1: Tools required for module removal 6--3.................
Table 6--2: Remove and replace procedure list 6--4.................
Table 6 --3: Equipment required for troubleshooting 6--39............
Table 6--4: Low-voltage power supplies 6--42.......................
Table 6--5: Fault symptom table 6--43.............................
Table 7--1: Options 7--1........................................
Table 7--2: Standard accessories 7--2.............................
Table 7--3: Optional accessories 7--2..............................
vi
WFM90D and WFM91D Service 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.
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.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
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 apply a potential to any terminal, including the common terminal, that
exceeds the maximum rating of that terminal.
Replace Batteries Properly. Replace batteries only with the proper type and rating
specified.
Recharge Batteries Properly. Recharge batteries for the recommended charge
cycle only.
Use Proper AC Adapter. Use only the AC adapter specified for this product.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Use Proper Fuse. Use only the fuse type and rating specified for this product.
Avoid Exposed Circuitry. Do not touch exposed connections and components
when power is present.
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.
WFM90D and WFM91D Service Manual
vii
General Safety Summary
Symbols and Terms
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 conditions 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. The following symbols may appear on the product:
CAUTION
Refer to Manual
viii
WFM90D and WFM91D Service 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 unless another person capable of rendering first aid and resuscitation is
present.
Disconnect Power. To avoid electric shock, switch off the instrument power, then
disconnect the power cord from the mains power.
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.
To avoid electric shock, do not touch exposed connections.
WFM90D and WFM91D Service Manual
ix
Service Safety Summary
x
WFM90D and WFM91D Service Manual
Preface
About This Manual
This manual provides instructions for servicing the WFM90D and WFM91D
Handheld Waveform, Vector, Picture, and Audio Monitors. This manual
describes features and specifications that are common to all generator modules.
These include system configuration and the common control interface.
This manual is composed of the following sections:
H Specifications lists the electrical and environmental specifications and
provides a general product description.
H Operating Information describes installation and front panel operation of the
instrument.
H Theory of Operation contains a module-level description based on block
diagrams of the instrument circuitry.
H Performance Verification provides procedures for verifying instrument
performance.
Related Manuals
H Adjustment Procedures provides procedures for adjusting the instrument to
meet performance levels listed in Specifications.
H Maintenance contains instructions for cleaning the instrument, procedures
for removal and replacement of instrument modules, and troubleshooting
procedures.
H Options lists all of the options that you might find on your instrument.
H Replaceable Mechanical Parts lists the part numbers of the replaceable
electrical and mechanical parts and assemblies.
H Diagrams contains the instrument interconnect diagram.
The WFM90D & WFM91D Handheld Waveform, Vector, Picture, & Audio
Monitor User Manual (Tektronix part number 071-1142-XX) describes in detail
how to operate the instrument.
WFM90D and WFM91D Service Manual
xi
Preface
Contacting Tektronix
Phone 1-800-833-9200*
Address Tektronix, Inc.
Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
Web site www.tektronix.com
Sales support 1-800-833-9200, select option 1*
Service support 1-800-833-9200, select option 2*
Technical support www.tektronix.com/support
1-800-833-9200, select option 3*
6:00 a.m. -- 5:00 p.m. Pacific Standard Time
* This phone number is toll free in North America. After office hours, please leave a voice mail
message.
Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web
site for a list of offices.
xii
WFM90D and WFM91D Service Manual
Specifications
Specifications
Product Description
This section includes the following information:
H Product description
H Specifications tables
The handheld, self-contained, Tektronix WFM90D and WFM91D television
waveform monitors can monitor analog and digital signals. The monitors provide
composite and component waveform displays as well as vector and picture
displays.
These monitors can be used in the traditional in-house applications of television
production, post-production, and signal transmission. In addition, their portability allows them to be used in non-traditional applications such as field production
and system maintenance.
Key Features
H Accepts NTSC/PAL composite video or 525/625 Component 270 Mbit serial
digital video signals
H Automatic detection of analog or serial digital signals
H Built-in color display (TFT LCD)
H Viewing angle control
H Electronic graticules
H Battery or AC adapter powered
H Menu-assisted monitoring operation
H Audio signal input/output
H Waveform, Vector, Picture, Audio, and Waveform-in-Picture display modes
H Line select lets you view any single line of video
H Selectable time out for backlight or instrument power
H Signal level alarm mode for waveform and audio displays
H Preset menu to store/recall front panel and menu setups
H Instrument adjustments from front panel (see service manual)
WFM90D and WFM91D Service Manual
1- 1
Specifications
Characteristics Tables
The tables use the following abbreviations:
Performance Requirement (Req). All performance requirements in the specification tables are identified with Req, and can be assured by completing the
Performance Check Procedure located in the service manual. Allow a warm-up
time of 20 minutes.
Performance requirements in the electrical specifications are valid over an
ambient temperature range of +20° Cto+30° C. The Performance Requirement
tolerances listed in the Electrical Specification are doubled over the temperature
range of 0° Cto+40° C, unless otherwise specified. Test equipment used to
verify Performance Requirements must be calibrated and working within the
limits specified in the service manual Equipment Required List.
Reference Information. Information that amplifies a performance requirement or
is of special importance is indicated by REF. There is no need to check these
items to a specific tolerance.
Electrical Specifications
Table 1- 1: Vertical deflection system
Category Description
Frequency Response
Analog Input REF: Specifications apply for full screen height video input signal, with VARIABLE GAIN off.
REQ: Flat Filter 1 V Full Scale:
50 kHz to 6 MHz within 2% of response at 50 kHz.
REQ: Flat Filter X5 Gain:
50 kHz to 6 MHz within 5% of response at 50 kHz.
REF: Low Pass Filter:
≥40 dB attenuation at 3.58 MHz NTSC, 4.43 MHz PAL.
REF: Response at 15 kHz does not vary between FLAT and LUM (low pass) filters by more than 1%.
Digital Input REF: Specifications apply for full screen height video input signal, with VARIABLE GAIN off.
REQ: Flat Filter 1 V Full Scale:
50 kHz to 4.5 MHz ±4%.
REQ: Flat Filter X5 Gain:
50 kHz to 4.5 MHz ±5%.
REF: Low Pass Filter:
≥40 dB attenuation at 3.58 MHz NTSC, 4.43 MHz PAL.
REF: Response at 15 kHz does not vary between FLAT and LUM (low pass) filters by more than 1%.
1- 2
WFM90D and WFM91D Service Manual
Table 1- 1: Vertical deflection system (Cont.)
Category Description
Deflection Factor REQ: Analog Input, 1 V Full Scale:
1 V input displayed within 1% of 140 IRE
REF: Flat filter selected.
REQ: Digital Input, 1 V Full Scale:
1 V input displayed within 2% of 140 IRE
REF: Flat filter selected.
REQ: X5 Gain:
Gain accuracy within 5% with 1 V input signal.
REF: X5 Gain Registration:
≤1 major division of vertical shift from baseline between unmagnified and magnified signal.
REQ: Variable Gain Range:
Input signals between 0.8 V and 2 V can be adjusted to 140 IRE (1.0 V) display. 160 mV to 400 mV
for X5 Gain.
REQ: Position Range:
1 V signal can be positioned so that peak white and sync tip can be placed at blanking level, with the
DC RESTORER on, regardless of gain setting.
Specifications
Transient Response
Analog Input REF: Specifications apply for full screen height video input signal, with VARIABLE GAIN off, 1 V Full
Scale or X5 Gain selected, and FLAT filter selected.
REF: Pulse-to-Bar Ratio:
X1: 0.99:1 to 1.01:1.
X5: 0.98:1 to 1.02:1.
REF: Preshoot: ≤1%.
REF: Overshoot: X1: ≤2%.
X5: ≤4%.
REF: Ringing: X1: ≤2%.
X5: ≤4%.
REF: Field Rate Tilt: ≤1%.
REF: Line Rate Tilt: ≤1%.
REQ: Overscan: ≤2% variation in baseline of 100 IRE (700 mV) 12.5T (20T) modulated pulse as it is
positioned over the middle 80% of the screen.
WFM90D and WFM91D Service Manual
1- 3
Specifications
Table 1- 1: Vertical deflection system (Cont.)
Category Description
Transient Response
Digital Input REF: Specifications apply for full screen height video input signal, with VAR GAIN off, 1 V Full Scale
or X5 Gain selected, and FLAT filter selected.
REF: Pulse-to-Bar Ratio:
X1: 0.99:1 to 1.01:1
X5: 0.98:1 to 1.02:1
REF: Preshoot: ≤1%
REF: Overshoot: X1: ≤2%
X5: ≤4%
REF: Ringing: X1: ≤2%
X5: ≤4%
REF: Field Rate Tilt: ≤1%
REF: Line Rate Tilt: ≤1%
Maximum Absolute Input
Level
DC Input Impedance
(Unterminated)
Video Input Return Loss
REF: ±5 VDC plus peak AC.
REF: Displays in excess of 200 IRE (1.428 V) may cause frequency response aberrations.
REQ: ≥15 kΩ.
REF: With input switch in the HIZ position.
REF: ≥40 dB from 50 kHz to 6 MHz
≥15 dB from 6 MHz to 270 MHz
REF: With 75 Ω termination on.
Video Out Return Loss
REF: ≥30 dB from 50 kHz to 6 MHz.
(75 Ω)
Video Out Differential
REF: Within 1% with a 140 IRE (1.0 V PAL) unit display. Analog input only.
Gain (50% APL)
Video Out Differential
REF: Within 1° with a 140 IRE (1.0 V PAL) unit display. Analog input only.
Phase (50% APL)
Table 1- 2: DC rest oration
Category Description
DC Restorer Clamp Time REF: Back Porch.
Frequency Response
at 60 Hz (50 Hz PAL)
REQ: Attenuation of 60 Hz (50 Hz PAL) on Input Signal:
Slow Mode: ≤20%.
Fast Mode: ≥90%.
REF: Blanking Level Shift with 10% to 90% APL Change: APL changes from 50% to either 10% or
90% will cause blanking level shift of 1 IRE unit (7.14 mV PAL) or less.
REF: Blanking Level Shift Due to Presence or Absence of Burst: 1 IRE unit (7.14 mV PAL) or less
shift from no color burst to presence of color burst.
1- 4
WFM90D and WFM91D Service Manual
Table 1- 3: Audio mode
Category Description
Reference Levels REQ: --10 dBu, 0 dBu, +4 dBu, +8 dBu.
REF: Nominal MIC reference: --50 dBu.
Measurement Accuracy REQ: 0.5 dB at 1 kHz.
Frequency Response REQ: 0.5dBfrom50Hzto20kHz.
Maximum Input Level Amplitude REF: +18 dBu.
Specifications
DC Input Impedance
REF: ≥15 kΩ.
Audio Output Connector REF: Mini stereo headphone jack.
Maximum Power Output REF: 250 mW.
Table 1- 4: Horizontal deflection system
Category Description
Sweep REQ: Sweep will occur in all Horizontal mode settings with or without synchronization.
REF: Sweep Length: Two Line and Two Field sweep length is nominally 12 divisions.
1LINE Sweep Repetition Rate REQ: Equal to line-rate of applied video or external sync.
2LINE Sweep Repetition Rate REQ: Equal to half line-rate of applied video or external sync.
2FLD Sweep Repetition Rate REF: Displays 2 full fields, including the field-rate sync between them.
2FLD Sweep Magnification REF: Approximately X20.
Sweep Magnifier Registration REF: Magnification occurs about the center of the screen.
Timing Accuracy REF: All timing and linearity specifications exclude the first and last major divisions of the
unmagnified display.
REQ: 10 s/division (2LINE): Within 2%.
REQ: 5 s/division (1LINE): Within 2%.
REQ: 1 s/division (2LINE + MAG): Within 2%.
REQ: 0.5 s/division (1LINE + MAG): Within 3%.
Integral Linearity REQ: Within 1%.
REF: Measured between the 10 s and 110 s points on the 10 s/division (2LINE)
sweep.
Horizontal Position REF: Any portion of a synchronized video sweep can be positioned on-screen in all sweep
modes.
WFM90D and WFM91D Service Manual
1- 5
Specifications
Table 1- 5: Vector mode
Category Description
Chrominance Processing Nominal
Subcarrier Frequency (F
SC
)
Chrominance Processing
Chrominance Bandwidth
Chrominance Processing +V Mode
(Applicable to PAL operation only)
Display Vector Phase
Accuracy
Display Vector Gain Stability
Display Quadrature Phasing
Display Differential Phase
Display Differential Gain
REF: NTSC: 3.579545 MHz.
PAL: 4.43361875 MHz.
REQ: Upper --3 dB Point:
+500 kHz,100 kHz.
F
SC
Lower --3 dB Point:
-- 500 kHz,100 kHz.
F
SC
REF: +V-type display as selected by front-panel button. When pushed, V axis is inverted
at a 1/2 line rate to produce a single vector display.
REF: 1.25°. Analog input only.
REF: Measured with color bar signal.
REF: Typically 2.5%. Analog input only.
REF: Typically 0.5°. Analog input only.
REF: 1°. Analog input only.
REF: Measured with 140 IRE (1 V) linearity signal (5 step, 10 step, or Ramp) with 40 IRE
(300 mV) of subcarrier.
REF: 1%. Analog input only.
REF: Measured with 140 IRE (1 V) linearity signal (5 step, 10 step, or Ramp) with 40 IRE
(300 mV) of subcarrier.
Subcarrier Regenerator Pull-In
Range
REQ: NTSC: 50 Hz of F
PAL: 10 Hz of F
REF: Subcarrier Regenerator free-runs in absence of appropriate signal. Reference can
SC
SC
.
.
be burst of either displayed signal or external reference signal.
Subcarrier Regenerator Pull-In Time REF: Pull-In Time: Within 1 second, with subcarrier frequency within 50 Hz (10 Hz for
Subcarrier Regenerator Phase Shift
with Subcarrier Frequency Change
Subcarrier Regenerator Phase Shift
with Burst Amplitude Change
Subcarrier Regenerator Phase Shift
PAL) of F
REQ: NTSC: 2° from F
PAL: 2° from F
REQ: 2° from nominal burst amplitude to 6 dB.
REF: Internal or External burst reference.
REQ: 1° as gain is varied from +3 dB to --6 dB.
SC
.
to (FSC+50Hz),orFSCto (FSC-- 5 0 H z ) .
SC
to (FSC+10Hz),orFSCto (FSC-- 1 0 H z ) .
SC
with Variable Gain Control
Subcarrier Regenerator Phase
REF: 360° continuous rotation.
Control Range
Subcarrier Regenerator Burst Jitter REF: 0.5° RMS or less.
REF: With 140 IRE (1 V) composite video input. INT or EXT referenced.
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WFM90D and WFM91D Service Manual
Table 1- 6: Synchronization
Category Description
Input Requirements REQ: Internal Reference
Analog Input:
Composite video or black burst with sync amplitudes 40 IRE (300 mV PAL) 6 dB.
Digital Input:
270 Mbit (259M).
REQ: External Reference:
Sync amplitude between 143 mV and 4 V will synchronize sweeps.
External Reference Input REQ: DC Input Impedance (Unterminated):
≥15 kΩ.
REF: Return Loss (75 Ω):
≥40 dB from 50 kHz to 6 MHz. (With 75 Ω termination on, instrument power on.)
REF: Absolute Maximum Input Voltage: 12 VDC plus peak AC.
Specifications
Table 1- 7: Power source
Category Description
Battery REF: 6 C-cell batteries or Tektronix NiMH battery pack
(Tektronix part number 146-0107-01).
Battery Charge Time REF: Fast Charge: 550 mA.
REF: Slow Charge: 150 mA.
Power Consumption REF: Picture Mode: 7 Watts.
Waveform Mode 9 W.
Vector Mode 9 W.
External Power REQ: DC Source of 11 -- 18 V.
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Specifications
Physical Characteristics
Table 1- 8: Physical characteristics
Category Description
Dimensions REF: Instrument:
5 inches (127 mm).
3.15 inches (80.0 mm).
9.6 inches (243.8 mm).
Shipping Box:
13.25 x 13.75 x 6 inside
14 x 14.25 x 6.25 outside
Weight REF: With batteries and pouch:
3 lb. 13 oz.
Without batteries and pouch:
2lb.8oz.
Shipping weight with packaging:
6lb.8oz.
Environmental Characteristics
Table 1- 9: Environmental char acteristics
Category Description
Operating Altitude REQ: To 9,842 feet (3000 meters).
Operating Temperature REQ: 0°C to +40° C.
Vibration -- Operating REF : 15 minutes each axis at 0.015 inch, frequency varied from 10--55--10 Hz in 1-minute
cycles with instrument secured to vibration platform. Ten minutes each axis at any
resonant point or at 55 Hz if no resonant point is found.
Shock -- Non-Operating REF: 100 g’s, 1/2 sine, 11 ms duration, 3 shocks per surface (18 total).
Transportation REF: Qualified under NTSC Test Procedure 1A, Category II (24-inch drop).
Humidity REF: Will operate at 95% relative humidity for up to five days.
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WFM90D and WFM91D Service Manual
Certification and Compliances
Table 1- 10: Certifications and Compliances
Category Standards or description
EC Declaration of Conformity -- EMC Meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility.
Compliances were demonstrated using EN 61326:1997 EMC Product Family Standard for
Electrical Equipment for Measurement, Control, and Laboratory use.
Specifications
1,2
1
:
:
3,4
Performance Criterion “A”
3
, Performance Criterion “A”
Emissions
EN 61326 Class A Radiated and Conducted Emissions
EN 61000-3-2(A14)Conducted Power Line Harmonic Current
Immunity
IEC 61000-4-2 Electrostatic Discharge Immunity, Performance Criterion “B”
IEC 61000-4-3 Radiated RF Electromagnetic Field Immunity
IEC 61000-4-4 Electrical Fast Transient/Burst Immunity, Performance Criterion “B”
IEC 61000-4-5 Power Line Surge Immunity, Performance Criterion “B”
IEC 61000-4-6 Conducted RF Immunity
IEC 61000-4-11 Voltage Dips and Short Interruptions Immunity, Performance Criterion “B”
Australia Declaration of Conformity Complies with EMC Framework and demonstrated per Emission standard:
AS/NZS 2064 Industrial, Scientific, and Medical Equipment.
USA, FCC Compliance Emissions comply with FCC Code of Federal Regulations 47, Part 15, Subpart B, Class A
Limits.
EMC Compliance Meets the intent of Directive 89/336/EEC for Electromagnetic Compatibility when used with the
product(s) stated in the specifications table. Refer to the EMC specification published for the
stated products. May not meet the intent of the directive if used with other products.
Equipment Type Test and measuring
Safety Class Class 3 (as defined in IEC 61010-1, Annex H)
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Specifications
Table 1- 10: Certifications and Compliances (Cont.)
Category Standards or description
Pollution Degree Pollution Degree 2 (as defined in IEC 61010-1). Note: Rated for indoor use only.
Pollution Degree Descriptions A measure of the contaminates that could occur in the environment around and within a
product. Typically the internal environment inside a product is considered to be the same as the
external. Products should be used only in the environment for which they are rated.
Pollution Degree 1 No pollution or only dry, nonconductive pollution occurs. Products in this
category are generally encapsulated, hermetically sealed, or located in
clean rooms.
Pollution Degree 2 Normally only dry, nonconductive pollution occurs. Occasionally a
temporary conductivity that is caused by condensation must be expected.
This location is a typical office/home environment. Temporary condensation
occurs only when the product is out of service.
Pollution Degree 3 Conductive pollution, or dry, nonconductive pollution that becomes
conductive due to condensation. These are sheltered locations where
neither temperature nor humidity is controlled. The area is protected from
direct sunshine, rain, or direct wind.
Pollution Degree 4 Pollution that generates persistent conductivity through conductive dust,
rain, or snow. Typical outdoor locations.
1
Compliance demonstrated using high quality, shielded interface cables.
2
Minimum immunity test requirement, except where noted.
3
Performance Criterion: Product continues to operate properly and display remains readable.
4
Controlled EM environment requirement (1V/M).
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WFM90D and WFM91D Service Manual
Operating Information
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