Service Manual SPG 422 Component Digital Sync Generator S/N B034000 and above 071-0596-00

286 Pages·2000·2.64 MB·English

Service Manual
SPG 422
Component Digital Sync Generator
S/N B034000 and above
071-0596-00
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.
Copyright (cid:1) 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.

Table of Contents
General Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Service Safety Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi
Specifications
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–1
Characteristics Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–2
Signal Illustrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–24
Operating Information
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Genlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Genlock Video Standard . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Genlock Input Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Genlock Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Black Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Bars Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Serial Black . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–3
Audio Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Serial Signals (Option 2 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
Theory of Operation
Genlock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Front Panel Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–1
Digital Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–3
Output Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–4
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
Option 1 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–6
Option 2 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7
Detailed Circuit Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–7
Output Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–10
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–15
Option 1 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–21
Option 2 Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–23
Performance Verification
Equipment Required. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–1
Calibration Data Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–3
Performance Verification Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11
Adjustment Procedures
Summary Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
Adjustment Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–2
SPG 422 Service Manual (B034000 and above) i
Table of Contents
Maintenance
Service Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
Preparation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–1
Service Setups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Configuring the Remote . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Inspection and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–2
Corrective Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–5
Tektronix Service Offerings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–6
Repackaging Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–13
Options
Power Cord Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–1
Ordering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7–2
Replaceable Electrical Parts
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
Using the Replaceable Electrical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8–1
Diagrams
Replaceable Mechanical Parts
Parts Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–1
Using the Replaceable Mechanical Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . 10–1
ii SPG 422 Service Manual (B034000 and above)
Table of Contents
List of Figures
Figure 1–1: Timing relationship between digital video data and
analog line synchronization (reference for line scanning)
in the 525/60 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
Figure 1–2: Timing relationship between digital video data and
analog line synchronization (reference for line scanning)
in the 625/50 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
Figure 1–3: Relationship between digital and analog fields,
showing also the position of the digital field-blanking interval
in the 625 system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–5
Figure 1–4: Relationship of video data/vertical sync, in 525 system . 1–6
Figure 1–5: 60 Hz black burst with 7.5 IRE setup . . . . . . . . . . . . . . . . 1–10
Figure 1–6: 60 Hz black burst with no setup . . . . . . . . . . . . . . . . . . . . 1–11
Figure 1–7: 50 Hz black burst . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–11
Figure 1–8: 75% Color bars — Y channel . . . . . . . . . . . . . . . . . . . . . . 1–24
Figure 1–9: 75% Color bars — CB channel . . . . . . . . . . . . . . . . . . . . . 1–24
Figure 1–10: 75% Color bars — CR channel . . . . . . . . . . . . . . . . . . . . 1–25
Figure 1–11: 100% Color bars — Y channel . . . . . . . . . . . . . . . . . . . . 1–25
Figure 1–12: 100% Color bars — CB channel . . . . . . . . . . . . . . . . . . 1–26
Figure 1–13: 100% Color bars — CR channel . . . . . . . . . . . . . . . . . . . 1–26
Figure 1–14: 100% Red — Y channel . . . . . . . . . . . . . . . . . . . . . . . . . . 1–27
Figure 1–15: 100% Red — CB channel . . . . . . . . . . . . . . . . . . . . . . . . . 1–27
Figure 1–16: 100% Red — CR channel . . . . . . . . . . . . . . . . . . . . . . . . 1–28
Figure 1–17: EIA bars (part of SMPTE bars) — Y channel . . . . . . . . 1–28
Figure 1–18: EIA bars (part of SMPTE bars) — CB channel . . . . . . 1–29
Figure 1–19: EIA bars (part of SMPTE bars) — CR channel . . . . . . 1–29
Figure 1–20: IWQ bars (part of SMPTE bars) — Y channel . . . . . . . 1–30
Figure 1–21: IWQ bars (part of SMPTE bars) — CB channel . . . . . . 1–30
Figure 1–22: IWQ bars (part of SMPTE bars) — CR channel . . . . . 1–31
Figure 1–23: Reverse bars (part of SMPTE bars) — Y channel . . . . 1–31
Figure 1–24: Reverse bars (part of SMPTE bars) — CB channel . . . 1–32
Figure 1–25: Reverse bars (part of SMPTE bars) — CR channel . . . 1–32
Figure 1–26: Multiburst — Y channel . . . . . . . . . . . . . . . . . . . . . . . . . 1–33
Figure 1–27: Multiburst for CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–33
Figure 1–28: Multiburst for CB and CR . . . . . . . . . . . . . . . . . . . . . . . . 1–34
Figure 1–29: Modulated pulse and bar — Y channel . . . . . . . . . . . . . 1–34
Figure 1–30: Modulated pulse and bar for CB . . . . . . . . . . . . . . . . . . . 1–35
SPG 422 Service Manual (B034000 and above) iii
Table of Contents
Figure 1–31: Modulated pulse and bar for CR . . . . . . . . . . . . . . . . . . 1–35
Figure 1–32: Convergence (horizontal) — Y channel . . . . . . . . . . . . . 1–36
Figure 1–33: Convergence (horizontal) — CB and CR channels . . . . 1–36
Figure 1–34: Convergence (vertical) — Y channel . . . . . . . . . . . . . . . 1–37
Figure 1–35: Convergence (vertical) — CB and CR channels . . . . . . 1–37
Figure 1–36: Active picture markers (part of active picture
timing test signal) — Y channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–38
Figure 1–37: Active picture markers (part of active picture
timing test signal) — CB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–38
Figure 1–38: Active picture markers (part of active picture
timing test signal) — CR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–39
Figure 1–39: White bar (part of active picture timing test signal) —
Y channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–39
Figure 1–40: White bar (part of active picture timing test signal) —
CB and CR channels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–40
Figure 1–41: Bowtie sweep — Y channel . . . . . . . . . . . . . . . . . . . . . . . 1–40
Figure 1–42: Bowtie — CB and CR channels . . . . . . . . . . . . . . . . . . . . 1–41
Figure 1–43: Bowtie markers — Y channel . . . . . . . . . . . . . . . . . . . . . 1–41
Figure 1–44: Ramp — Y channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–42
Figure 1–45: Ramp — CB channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–42
Figure 1–46: Ramp — CR channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–43
Figure 1–47: Pluge — Y channel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–43
Figure 1–48: Pluge — CB and CR channels . . . . . . . . . . . . . . . . . . . . . 1–44
Figure 2–1: SPG 422 front panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Figure 2–2: Various ways genlock input can be configured . . . . . . . . 2–2
Figure 2–3: Illustration of SPG 422 timing . . . . . . . . . . . . . . . . . . . . . . 2–4
Figure 3–1: SPG 422 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–2
Figure 3–2: Block diagram of genlock Input <1>. . . . . . . . . . . . . . . . . 3–11
Figure 3–3: Block diagram of burst and sync locks <2> . . . . . . . . . . 3–12
Figure 3–4: Power inductor circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–17
Figure 3–5: Pulse width modulator and error amplifier circuit . . . . . 3–19
Figure 4–1: Setup to check serial digital video signals . . . . . . . . . . . . . 4–11
Figure 4–2: Various parts of the serial data stream . . . . . . . . . . . . . . . 4–13
Figure 4–3: Setup required to check for an embedded audio signal . 4–14
Figure 4–4: Setup to check accuracy of serial audio signals . . . . . . . . 4–16
Figure 4–5: Setup to check serial audio signal . . . . . . . . . . . . . . . . . . . 4–17
Figure 4–6: Setup to check NTSC analog black outputs . . . . . . . . . . . 4–20
iv SPG 422 Service Manual (B034000 and above)
Table of Contents
Figure 4–7: Setup to check PAL analog black outputs . . . . . . . . . . . . 4–26
Figure 4–8: Setup to check the oscillator frequency . . . . . . . . . . . . . . 4–32
Figure 4–9: Setup to check some genlock functions . . . . . . . . . . . . . . . 4–33
Figure 4–10: Setup to check burst lock phase change . . . . . . . . . . . . . 4–37
Figure 4–11: Setup to check genlock with hum . . . . . . . . . . . . . . . . . . 4–39
Figure 4–12: Setup to check isolation . . . . . . . . . . . . . . . . . . . . . . . . . . 4–40
Figure 4–13: Basic setup for return loss checks . . . . . . . . . . . . . . . . . . 4–42
Figure 5–1: Setup for sync tip adjustment . . . . . . . . . . . . . . . . . . . . . . 5–4
SPG 422 Service Manual (B034000 and above) v
Table of Contents
List of Tables
Table 1–1: Encoding parameters for serial digital video outputs . . . 1–2
Table 1–2: Timing relationships for serial digital video outputs . . . . 1–3
Table 1–3: Output characteristics for serial digital video signals . . . 1–7
Table 1–4: Signal characteristics for analog black outputs
(in base instrument only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–7
Table 1–5: Signal characteristics for analog black outputs
(in Option 1 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–9
Table 1–6: Signal characteristics for serial bars output . . . . . . . . . . . 1–12
Table 1–7: Signal characteristics for serial test signal
(Option 2 only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–13
Table 1–8: Signal characteristics for AES/EBU serial digital audio
outputs (XLR connectors) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–14
Table 1–9: Signal characteristics for AES/EBU serial digital audio
outputs (BNC outputs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–14
Table 1–10: Signal characteristics for embedded serial audio . . . . . . 1–15
Table 1–11: 20-bit audio signal sample distribution for
embedded serial audio on 525/59.94 signals . . . . . . . . . . . . . . . . . 1–16
Table 1–12: 20-bit audio signal sample distribution for
embedded serial audio on 625/50 signals . . . . . . . . . . . . . . . . . . . . 1–16
Table 1–13: Audio channel status bits (serial and embedded
audio data streams) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–18
Table 1–14: Genlock function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–19
Table 1–15: Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–20
Table 1–16: Mechanical (physical) characteristics . . . . . . . . . . . . . . . 1–21
Table 1–17: Environmental characteristics . . . . . . . . . . . . . . . . . . . . . 1–21
Table 1–18: Certifications and compliances . . . . . . . . . . . . . . . . . . . . . 1–22
Table 4–1: List of required equipment . . . . . . . . . . . . . . . . . . . . . . . . . 4–2
Table 6–1: Relative susceptibility levels . . . . . . . . . . . . . . . . . . . . . . . . 6–3
Table 6–2: Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–9
Table 6–3: Diagnostic switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6–10
vi SPG 422 Service Manual (B034000 and above)