Tektronix TSG 120 User manual

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Instruction Manual
TSG 120
YC / NTSC Signal Generator
S/N B020765 and Above
070-8003-02

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

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
defective 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 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 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.

Contacting Tektronix
Product
Support For application-oriented questions about a Tektronix measure- ment product, call toll free in North America:
1-800-TEK-WIDE (1-800-835-9433 ext. 2400)
6:00 a.m. – 5:00 p.m. Pacific time
Or contact us by e-mail:
[email protected]
For product support outside of North America, contact your
local Tektronix distributor or sales office.
Service
Support Contact your local Tektronix distributor or sales office. Or visit our web site for a listing of worldwide service locations.
http://www.tek.com
For other
information In North America: 1-800-TEK-WIDE (1-800-835-9433)
An operator will direct your call.
To write us Tektronix, Inc.
P.O. Box 1000
Wilsonville, OR 97070-1000

Service Assurance
If you have not already purchased Service Assurance for this product, you may do so at any time during the product’s
warranty period. Service Assurance provides Repair Protection and Calibration Services to meet your needs.
Repair Protection extends priority repair services beyond the product’s warranty period; you may purchase up to three
years of Repair Protection.
Calibration Services provide annual calibration of your product, standards compliance and required audit documentation,
recall assurance, and reminder notification of scheduled calibration. Coverage begins upon registration; you may purchase
up to five years of Calibration Services.
Service Assurance Advantages
HPriced well below the cost of a single repair or calibration
HAvoid delays for service by eliminating the need for separate purchase authorizations from your company
HEliminates unexpected service expenses
For Information and Ordering
For more information or to order Service Assurance, contact your Tektronix representative and provide the information
below. Service Assurance may not be available in locations outside the United States of America.
Name VISA or Master Card number and expiration
Company date or purchase order number
Address Repair Protection (1,2, or 3 years)
City, State, Postal code Calibration Services (1,2,3,4, or 5 years)
Country Instrument model and serial number
Phone Instrument purchase date

TSG 120 YC/NTSC Signal Generator i
Table of Contents
General Safety Summary v. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Getting Started
Option 01 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 02 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
   1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Description 1–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Controls, Connections, and Jumpers 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Front Panel Controls 1–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Rear Panel Connections 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Jumpers 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications
Specifications 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Option 02 Signals 2–23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification
Performance Verification Checklist 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Performance Verification Procedures 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedure
Adjustment Check List 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustment Procedures 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
Configuring the Power Supply 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting the Power Supply Mains Voltage 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TSG 120 Block Diagram 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Replaceable Electrical Parts
Diagrams
Replaceable Mechanical Parts

Table of Contents
ii TSG 120 YC/NTSC Signal Generator
List of Figures
Figure 1–1: Standard front panel and controls 1–3. . . . . . . . . . . . . . . . . .
Figure 1–2: Option 02 front panel and controls 1–3. . . . . . . . . . . . . . . . . .
Figure 1–3: Rear panel and connections 1–4. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–1: Color bars component of SMPTE bars 2–6. . . . . . . . . . . . . .
Figure 2–2: Reverse blue bars component of SMPTE bars 2–7. . . . . . . .
Figure 2–3: IYQB component of SMPTE bars 2–8. . . . . . . . . . . . . . . . . . .
Figure 2–4: Red field 2–9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–5: Green field 2–10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–6: Blue field 2–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–7: 50% flat field 2–12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–8: 100% flat field 2–13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–9: 0% flat field 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–10: Chroma noise 2–15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–11: Chroma response and markers 2–16. . . . . . . . . . . . . . . . . . . .
Figure 2–12: Convergence 2–17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–13: 5 Step 2–18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–14: Mod ramp 2–19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–15: Pulse and bar 2–20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–16: Multiburst 2–21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–17: Matrix 2–22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–18: Y channel 75% color bars 2–23. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–19: C channel 75% color bars 2–23. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–20: Y channel cable multiburst signal 2–24. . . . . . . . . . . . . . . . . .
Figure 2–21: C channel for the following signals:cable multiburst,
cable sweep, Sin(x)/x, and ghost canceling 2–24. . . . . . . . . . . . . . . . . .
Figure 2–22: Y channel cable sweep markers 2–25. . . . . . . . . . . . . . . . . . . .
Figure 2–23: Y channel cable sweep signal 2–25. . . . . . . . . . . . . . . . . . . . . .
Figure 2–24: Y channel FCC test signal 2–26. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–25: C channel FCC test signal 2–26. . . . . . . . . . . . . . . . . . . . . . . .
Figure 2–26: Y channel of the Sin(x)/x test signal 2–27. . . . . . . . . . . . . . . .
Figure 2–27: Y channel for ghost canceling 2–27. . . . . . . . . . . . . . . . . . . . .
Figure 2–28: Y channel NTC7 test signal 2–28. . . . . . . . . . . . . . . . . . . . . . .
Figure 2–29: C channel NTC7 test signal 2–28. . . . . . . . . . . . . . . . . . . . . . .
Figure 2–30: Y channel NTC7 combination signal 2–29. . . . . . . . . . . . . . .
Figure 2–31: C channel NTC7 combination signal 2–29. . . . . . . . . . . . . . .

Table of Contents
TSG 120 YC/NTSC Signal Generator iii
Figure 3–1: Blanking level verification test setup
(video measurement set) 3–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–2: Blanking level verification test setup (oscilloscope) 3–5. . . . .
Figure 3–3: Sync amplitude verification test setup 3–6. . . . . . . . . . . . . . .
Figure 3–4: Differential Gain test setup 3–10. . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–5: Blanking level or amplitude test setup
(video measurement set) 3–11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 3–6: Blanking level or amplitude test setup (oscilloscope) 3–11. . .
Figure 3–7: Luminance amplitude test setup 3–12. . . . . . . . . . . . . . . . . . . .
Figure 3–8: Chrominance blanking level test setup 3–15. . . . . . . . . . . . . . .
Figure 3–9: Chrominance response test setup 3–16. . . . . . . . . . . . . . . . . . .
Figure 3–10: Chrominance-luminance delay test setup 3–17. . . . . . . . . . . .
Figure 3–11: Total harmonic distortion test setup 3–18. . . . . . . . . . . . . . . .
Figure 3–12: Free-running frequency test setup 3–19. . . . . . . . . . . . . . . . .
Figure 4–1:Audio tone level test setup 4–4. . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–2: ID click frequency test setup 4–5. . . . . . . . . . . . . . . . . . . . . . .
Figure 4–3: Oscillator frequency test setup 4–6. . . . . . . . . . . . . . . . . . . . .
Figure 4–4: NTSC sync amplitude test setup
(video measurement set) 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–5: NTSC sync amplitude test setup
(vac and waveform monitor) 4–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4–6: NTSC signal blanking level test setup 4–9. . . . . . . . . . . . . . . .
Figure 5–1: TSG 120 block diagram 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
iv TSG 120 YC/NTSC Signal Generator
List of Tables
Table 1–1: Standard instrument test signal summary 1–1. . . . . . . . . . . .
Table 1–2: Option 02 test signal summary 1–2. . . . . . . . . . . . . . . . . . . . . .
Table 1–3: Jumper position and function summary. 1–5. . . . . . . . . . . . . .
Table 2–1: General NTSC/YC test signal characteristics 2–1. . . . . . . . . .
Table 2–2: NTSC/YC test signals 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–3: NTSC/YC test signals Option 02 2–4. . . . . . . . . . . . . . . . . . . .
Table 2–4: Audio tone characteristics 2–30. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–5: Power supply specifications 2–30. . . . . . . . . . . . . . . . . . . . . . . .
Table 2–6: Physical characteristics 2–31. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 2–7: Environmental characteristics 2–31. . . . . . . . . . . . . . . . . . . . . .
Table 2–8: Certifications and compliances 2–32. . . . . . . . . . . . . . . . . . . . . .
Table 3–1: NTSC test signal output 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–2: Y and C test signal output 3–3. . . . . . . . . . . . . . . . . . . . . . . . . .
Table 3–3: Audio output and subcarrier frequency 3–3. . . . . . . . . . . . . .
Table 4–1: List of adjustment procedures 4–2. . . . . . . . . . . . . . . . . . . . . .

TSG 120 YC/NTSC Signal Generator v
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.
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
Use Proper Voltage Setting. Before applying power, ensure that the line selector is
in the proper position for the power source being used.
Connect and Disconnect Properly. Do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Ground the Product. This product is grounded through the grounding conductor
of the power cord. To avoid electric shock, the grounding conductor must be
connected to earth ground. Before making connections to the input or output
terminals of the product, ensure that the product is properly grounded.
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.
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.
Wear Eye Protection. Wear eye protection if exposure to high-intensity rays or
laser radiation exists.
Do Not Operate With SuspectedFailures. If you suspect there is damage to this
product, have it inspected by qualified service personnel.
Do Not Operate in Wet/DampConditions.
Do Not Operate in an Explosive Atmosphere.
Keep Product Surfaces Clean and Dry.
Provide Proper Ventilation. Refer to the manual’s installation instructions for
details on installing the product so it has proper ventilation.
To Avoid Fire or
Personal Injury

General Safety Summary
vi TSG 120 YC/NTSC Signal Generator
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:
ProtectiveGround
(Earth)Terminal CAUTION Refer to Manual Double Insulated
WARNING
High Voltage
Symbols and Terms

Getting Started

TSG 120 YC/NTSC Signal Generator 1–1
Getting Started
The TSG 120 YC/NTSC Signal Generator is a simple, cost-effective test signal
generator designed for the service environment. The TSG 120 digitally generates
NTSC and YC test signals simultaneously.
Table 1–1 lists the test signals supplied by the standard generator.
Table 1–1: Standard instrument test signal summary
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Format
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Standard Test Signals
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
YC/NTSC
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
SMPTEBars
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
RedField
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
50% Flat Field
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Convergence
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
GreenField
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
100% Flat Field
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ChrominanceNoise
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
BlueField
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
0% Flat Field
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
ChrominanceRe-
sponse
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
5 Step
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Pulse & Bar
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Matrix
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Multiburst
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ModRamp
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Bounce
Besides a complement of video signals, this test signal generator supplies two
channels of a balanced 1 kHz XLR-audio tone with jumper-selectable ID click in
Channel 1. The frequency of the ID click is adjustable.
Option 01
Option 01 adds a dedicated black burst output, utilizing the OPTION connector
on the rear panel. After S/N B010287, this output includes a Field Reference
pulse on field 1 line 10.
Option 02
Option 02 adds a special signal for the cable TV industry.
Table 1–2 lists the test signals supplied by the TSG 120 Option 02.

Getting Started
1–2 TSG 120 YC/NTSC Signal Generator
Table 1–2: Option 02 test signal summary
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
Format
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Opt 02 Test Signals
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
YC/NTSC
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
SMPTEBars
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
75%Bars
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
CableSweep
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
CableMultiburst
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
(Sin x)/x
3 dB = 4.75 MHz
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
0% Field
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
50%Field
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
100%Field
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
CableMatrix
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
TransmissionMatrix
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
Á
NTC7Matrix
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Á
5-Step
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁ
FCCComposite
ÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁ
Multiburst
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁ
FieldSquare
ÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁ
Bounce
Audio Tone ID
The generators audio tone output is a balanced 1 kHz XLR audio tone. Audio
output gain is adjustable via R123 (Channel 1) and R122 (Channel 2).
A channel ID click is provided on Channel 1. The frequency of the ID click may
be changed, or the click may be disabled. To change the frequency of the ID
click, adjust R126. To disable the ID click, move jumper J12 from position 1-2
to position 2-3.
Physical Description
The TSG 120 YC/NTSC Signal Generator consists of four circuit boards and
three cables in a rectangular sheet-aluminum chassis with a removeable top
cover. The major internal components are:
HA main board that performs most of the generators functions.
HA front panel board that decodes front-panel button selections.
HA ribbon cable that feeds decoded front-panel information to the main board.
HTwo BNC connector mounting boards: the top board contains one SVHS and
three BNC connectors; the bottom board contains two BNC connectors.
HA ribbon cable that supplies signals from the main board to the top BNC
connector mounting board.
HA ribbon cable that supplies signals from the main board to the bottom BNC
connector mounting board.

Getting Started
TSG 120 YC/NTSC Signal Generator 1–3
Controls, Connections, and Jumpers
This section describes the front and rear panel controls.
CAUTION. This instrument is shipped from the factory configured for 115 VAC,
60 Hz operation. Attempting to operate the instrument at any other voltage
without reconfiguring the power supply may cause damage. Refer to the Section
5, Maintenance for information on configuring the power supply.
The front panel contains eight test-signal selection buttons. Above the buttons
are two rows of test signal selections. On the left side are two LEDs, one for
each row. These LEDs indicate the test signal row selected.
Figure 1–1: Standard Front Panel and Controls
Figure 1–2: Option 02 Front Panel and Controls
Pressing a test-signal button lights the top-row LED and the LED in the button.
Successive presses of the same button toggles between the selections above that
button (for example, between Color Bars and Convergence).
Front Panel Controls

Getting Started
1–4 TSG 120 YC/NTSC Signal Generator
The Rear Panel connections, shown in Figure 1–3, are described below.
Figure 1–3: Rear Panel and Connections
1. NTSC test signal output.
2. NTSC test signal output.
3. Luminance output. (Y)
4. Chrominance output. (C)
5. Y/C output.
CAUTION. Do not use the S-Video output simultaneously with the Y and C BNC
outputs. Using the S-Video output while also using the Y and C BNC outputs will
degrade output accuracy.
6. Option 01 (Black Burst output).
7. 1 kHz audio tone output with jumper-selectable ID click (see jumper table
and calibration procedure).
8. 1 kHz audio tone output in phase with Channel 1.
9. Electrical mains input, factory set for 115 VAC (to change the power supply
operating voltage, see Configuring the Power Supply in Section 5).
Rear Panel Connections

Getting Started
TSG 120 YC/NTSC Signal Generator 1–5
Table 1–3 describes the jumper settings and their functions.
Table 1–3: Jumper position and function summary.
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
Jumper
ÁÁÁÁÁ
ÁÁÁÁÁ
Position
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Function
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J2
ÁÁÁÁÁ
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Service jumper, factory setting
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Diagnostictestsignalsenabled
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J3
ÁÁÁÁÁ
ÁÁÁÁÁ
TBD
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
For future use
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J6
ÁÁÁÁÁ
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
C/B–Y channel test signal enabled (factory setting)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
C/B–Y channel test signal disabled
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
J7
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Y channel test signal enabled (factory setting)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Y channel test signal disabled
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J8
ÁÁÁÁÁ
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
CTDM/R–Y channel test signal enabled (Option 01 only)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
CTDM/R–Ychanneltestsignaldisabled
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J12
ÁÁÁÁÁ
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Test jumper. ID click enabled (factory setting)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ID click disabled (factory setting)
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
J30
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Test jumper. Power supply circuit testing (removing this
jumper disables the –5 V supply)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
J31
ÁÁÁÁÁ
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Test jumper. Power supply circuit testing (removing this
jumper disables the +5 V supply)
ÁÁÁÁÁÁ
Á
ÁÁÁÁ
Á
ÁÁÁÁÁÁ
J108
ÁÁÁÁÁ
Á
ÁÁÁ
Á
ÁÁÁÁÁ
1–2
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁ
Á
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Field 1 Line 10 pulse enabled (black burst output)
ÁÁÁÁÁÁ
ÁÁÁÁÁÁ
(Option 01 only)
ÁÁÁÁÁ
ÁÁÁÁÁ
2–3
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ
Field 1 Line 10 pulse disabled
Jumpers