Tektronix 1741C Use and care manual

xx
1741C
Analog Dual-Standard Waveform Monitor
Specifications and Performance Verification
ZZZ
Technical Reference
*P077015200*
077-0152-00

1741C
Analog Dual-Standard Waveform Monitor
Specifications and Performance Verification
ZZZ
Technical Reference
xx
This document applies to firmware version 1.0.X.
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
077-0152-00

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 500
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit 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 new or reconditioned to like new performance. All replaced parts, modules and products become
the property of Tektronix.
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 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.
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.
[W2 – 15AUG04]

Table of Contents
General Safety Summary ......................................................................................... iii
Preface............................................................................................................... v
Related User Documents...................................................................................... v
Specifications ....................................................................................................... 1
Electrical Specifications....................................................................................... 1
Physical Specifications....................................................................................... 12
Alarms ......................................................................................................... 13
Performance Verification ......................................................................................... 15
Test Records........................................................................................................ 16
Test Record — Functional Tests ............................................................................ 16
Test Record — General Tests................................................................................ 18
Video and General Performance Verification Procedures..................................................... 20
Required Equipment.......................................................................................... 20
Instrument Tests............................................................................................... 21
Video Tests .................................................................................................... 25
1741C Specifications and Performance Verification i

Table of Contents
List of Tables
Table 1: Composite analog input waveform vertical characteristics.......................................... 1
Table 2: Composite analog inputs A, B, C, and D physical layer............................................. 2
Table 3: Waveform sweep (horizontal) deflection .............................................................. 3
Table 4: Waveform mode filter characteristics.................................................................. 3
Table 5: Composite vector mode ................................................................................. 4
Table 6: Timing display............................................................................................ 4
Table 7: Picture mode.............................................................................................. 5
Table 8: Picture monitor outputs (VGA Pix Mon).............................................................. 6
Table 9: LCD display .............................................................................................. 6
Table 10: External XGA output (EXT DISPLAY) .......................... .................. ................. 6
Table 11: LTC time code input / ground closures............................................................... 7
Table 12: VITC decoding.......................................................................................... 8
Table 13: External reference ...................................................................................... 8
Table 14: Ethernet.................................................................................................. 9
Table 15: USB ...................................................................................................... 9
Table 16: Remote port ............................................................................................ 10
Table 17: Power source........................................................................................... 12
Table 18: Miscellaneous.......................................................................................... 12
Table 19: Physical characteristics ............................................................................... 12
Table 20: Environmental performance.......................................................................... 12
Table 21: Common alarms ....................................................................................... 13
Table 22: Composite specific alarms............................................................................ 13
Table 23: 1741C analog waveform monitor functional test record .......................................... 16
Table 24: 1741C analog waveform monitor video performance test record ................................ 18
Table 25: 1741C waveform monitor video performance test record......................................... 18
Table 26: Required test equipment (video and general performance) ....................................... 20
ii 1741C Specifications and Performance Verification

General Safety Summary
General SafetySummary
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.
To Avoid Fire or Personal
Injury
Use Proper Power Cord. Use only the power cord specified for this product and
certified for the country of use.
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.
Power Disconnect. The power cord disconnects the product from the power source.
Do not block the power cord; it must remain accessible to the user at all times.
Do Not Operate Without Covers. Do not operate this product with covers or panels
removed.
Do Not Operate With Suspected Failures. If you suspect that there is damage to this
product, have it inspected by qualified service personnel.
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 in Wet/Damp Conditions.
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.
Terms in this Manual These terms may appear in this manual:
1741C Specifications and Performance Verification iii

General Safety Summary
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.
Symbols and 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.
The following symbol(s) may appear on the product:
iv 1741C Specifications and Performance Verification

Preface
This reference document provides technical information about using the 1741C
Analog Dual-Standard waveform monitors.
Related User Documents
The following related user documents are available:
1741C Analog Dual-Standard Waveform Monitors User Manual.This
document contains the detailed operating information for the instrument.
(Tektronix part numbers: English, 077-0150-XX; Simplified Chinese,
077-0151-XX).
1741C Analog Dual-Standard Waveform Monitors Service Manual (Tektronix
part number 077-0155-XX). This document provides servicing information
for the waveform monitor and is intended for qualified service personnel only.
1741C Analog Dual-Standard Waveform Monitors Declassification and
Security Instructions (Tektronix part number 077-0153-XX).
1741C Analog Dual-Standard Waveform Monitors Release Notes (Tektronix
part number 071-2585-XX). This document describes any known problems or
behaviors that you might encounter while using the waveform monitor.
1741C Specifications and Performance Verification v

Preface
vi 1741C Specifications and Performance Verification

Specifications
The following tables list the specifications for the Tektronix 1741C Waveform
Monitors. Items listed in the Performance Requirement column are generally
quantitative and can be tested by the Performance Verification procedure in
Section 2 of this manual. Items listed in the Reference Information column are
useful operating parameters that have typical values; information in this column
is not guaranteed.
The specifications listed in the Electrical Specifications portion of these tables
apply over an ambient temperature range of +0 °C to +40 °C. The rated accuracies
are valid when the instrument is calibrated in an ambient temperature range of
+20 °C to +30 °C.
Compliance information is located in the 1741C Analog Dual-Standard Waveform
Monitor User Manual.
Electrical Specifications
Table 1: Composite analog input waveform vertical characteristics
Characteristic Performance requirement Reference information
Measured using cursors or graticules
1X ± 1% Typically ±1% at all fixed gain settings
Vertical
Measurement
Accuracy 5X ± 1% Typically ±1% at all fixed gain settings
Gain X1, X2, X5, and X10
Variable Gain Range, Nominal 0.25X to 2X
Total Range with fixed and variable is 0.25
to 20x
Frequency Response 50 kHz to 5.75 MHz, ± 1%
Delay Variation over Frequency ± 10 ns to 5.75 MHz Typically ± 2.5 ns
Pulse to bar ratio 0.99:1 to 1.01:1
Preshoot ≤1%
Overshoot ≤1%
Transient
Response on
Sine Squared
2T4 Pulse
Ringing ≤1%
Field Rate Tilt < 0.5% With DC Restore Fast or Off
Line Rate Tilt < 0.5% With DC Restore Fast or Off
Off Screen Recovery ≤0.5% variation in baseline of a 10T (12.5T
NTSC) Chroma modulated pulse when
positioned anywhere on screen. Signal
must meet specification for Video Maximum
Operating Amplitude. Any gain setting.
SNR 60 dBRMS minimum, relative to 700 mv for
PAL or 714 mv for NTSC.
1741C Specifications and Performance Verification 1

Specifications
Table 2: Composite analog inputs A, B, C, and D physical layer
Characteristic Performance requirement Reference information
Formats Supported NTSC, NTSC no setup, and PAL systems,
I, B, D, G, H. Complies with SMPTE 170M
&ITU-RBT.47
1
Manual or auto detect of input standard
Internal Reference Proper horizontal and vertical synchronization
with a composite signal of appropriate line
and field rate
In multi-input display sync to the first active
input signal in the sequence A, B, C, D
Input Dynamic Range, Typical ± 6 dB range relativeto1Vcompositevideo
Video Maximum Operating
Amplitude with Clamp Off (DC
Coupled), Typical
–1.8 V to +2.2 V (all inputs) DC +peak AC
Maximum Absolute Video Input
Voltage
–6.0 V to +6.0 V (DC + peak AC)
Input Type Passive loop-through 75 Ωcompensated
DC Input Impedance 20 kΩ
Return Loss ≥40 dB to 6 MHz with power on Typically > 46 dB to 6 MHz, > 40 dB to
10 MHz (power on). Typically 35 dB with
power off for standard amplitude video
Video Input Crosstalk Between
Channels, Typical
≥60 dB to 6 MHz
Loop through Isolation, Typical ≥70 dBto6MHz
DC Offset with Restore Off, Typical ≤20 mV
Measured in full screen mode at X5 Gain.
Spec is set to accommodate moving a
calibrated composite option card between
mainframe slots or to a different instrument.
DC Restore Modes Fast, Slow, and Off modes. Back Porch
clamp.
Slow has a typical bandwidth of 10 Hz Fast
has a typical bandwidth of 500 Hz
DC Restore Offset Error, Typical ≤2mV
Registration between back porch and
0 V graticule
DC Offset Between Inputs With
Restore Off
≤7mV
DC Restore 50 Hz and 60 Hz Attenuation
Fast Mode > 95% attenuation
Slow Mode < 10% attenuation, < 10% peaking
Blanking Shift with 10% to 90%
APL Change, Typical
≤1 IRE (7 mV PAL)
2 1741C Specifications and Performance Verification

Specifications
Table 2: Composite analog inputs A, B, C, and D physical layer (cont.)
Characteristic Performance requirement Reference information
Blanking Shift with Presence and
Absence of Burst, Typical
≤1 IRE (7 mV PAL), Typically 0 mV
Lock Range ± 50 ppm fixed frequency error, remains
locked
Vector typically remains locked to ± 80 ppm.
Waveform display typically remains locked
to ± 200 ppm
Lock in Presence of Hum, Typical 700 mVp-p, on full amplitude 100% color bar
signal, remains locked
Lock in Presence of White Noise,
Typical
Signal/Noise ratio of 32 dB, 5 MHz bandwidth
on black burst, remains locked
Color Framing Correct color framing detected for signals
having < 45 SCH phase error with burst
present
Table 3: Waveform sweep (horizontal) deflection
Characteristic Performance requirement Reference information
Accuracy ± 0.5%, all rates Fully digital system
Sweep
Linearity 0.2% of time displayed on screen Fully digital system
Timing Cursor Delta Readout
Accuracy, Typical
± 0.5% of sweep time displayed on screen
Rates 1, 2, 3, or 4 line, or field depending on mode
Line Select In 2-line sweep, the selected line is the first
displayed line.
Table 4: Waveform mode filter characteristics
Characteristic Performance requirement Reference information
Luma Filter Gain 1 ± 0.1% relative to flat gain at 50 kHz
Luma Filter Frequency Response ≤3 dB attenuation at 800 kHz
> 32 dB attenuation at FSC
Chroma Filter Gain 1 ± 1.0% at Fsc, relative to flat gain
Chroma Filter Response 3 dB bandwidth 1 MHz ± 0.2 MHz
FSC is automatically selected based on input
standard, implemented digitally, centered on
FSC
Chroma Filter Attenuation at 2x FSC ≥25 dB
Implemented digitally. Typically 2Fsc
attenuation is 28 dB for NTSC, 53 dB for PAL
1741C Specifications and Performance Verification 3

Specifications
Table 5: Composite vector mode
Characteristic Performance requirement Reference information
Displayed Vector Gain Accuracy ± 2.5% PAL, ±1.25IRE NTSC, 75% Bars
Graticule
Color Bar test signal will land within 50% of
the distance between the center and edges
of the small target boxes. Small boxes
are ± 5% PAL, ±2.5IRE NTSC (75% bars
graticule).
Typical gain accuracy is ± 1%. Gain is
tied to the Displayed Vertical Measurement
Accuracy. Chrominance demodulation and
filtering implemented digitally.
Displayed Vector Phase Accuracy ± 1.25 degrees Color Bar test signal will land within 50% of
the distance between the center and edges
of the small target boxes. Small boxes are
±2.5 degrees.
Color Bar black/white display dot aligned with
center dot target. Any Residual Subcarrier
will displace this alignment and affect this
specification.
Chrominance demodulation and filtering
implemented digitally.
Display to Graticule Registration Centered in target, +0.5 box diameter
With the color bar black/white display dot
centered in target. Boxes are 2% targets
Vector Display U /B-Y is displayed on horizontal axis and V
/R-Y is displayed on vertical axis.
Bandwidth, Typical Fsc ± 360 kHz
Displayed Differential Phase ± 1 degree
Displayed Differential Gain, Typical ± 1%
Center Dot Reference Video is gated off to locate the Center Dot,
showing a “true” zero subcarrier reference.
This is for showing residual subcarrier.
Quadrature Phasing ± 0.1° Implemented digitally.
Horizontal to Vertical Bandwidth
Matching
< 0.5° at 500 kHz and 2 MHz
Table 6: Timing display
Characteristic Performance requirement Reference information
Input Timing Relative to External
Reference
Display of Vertical and Horizontal timing
offset graphically and numerically. One clock
cycle resolution.
Patented proprietary display. Display Timing
difference between input and Ref at rear
panel or relative to an offset saved by the
user.
4 1741C Specifications and Performance Verification

Specifications
Table 6: Timing display (cont.)
Characteristic Performance requirement Reference information
Timing Display Zero Definition For vertical timing, conforms to SMPTE
168-2002.
For horizontal timing, zero delay analog
signals have coincident syncs.
Timing zero is equivalent to nominal zero
delay on TG700. Also agrees with signal that
shows minimal shift on the waveform display
when going from internal to external.
Vertical timing, according to SMPTE 168,
specifies that the lines with the start of the
broad pulses are aligned.
Operation with input and reference
being different formats
In cases where there are multiple ways to
interpret the phase relationship, multiple
indicators of the phase will be shown. The
numeric display will follow the smallest
phase offset.
Table 7: Picture mode
Characteristic Performance requirement Reference information
Format (XGA) Allows viewing picture in all formats.
Full screen picture occupies the central
portion of the XGA raster area. For tile mode,
the image is downsampled to fit the 512 x
350 size.
Frames are repeated as needed to achieve
XGA frame rate; similar to 3:2 pulldown on
some frame rates.
Pix Border On/Off Allows user to mask or show the inactive
portions of the raster such as sync.
When the border is on, the image is scaled
to correct the aspect ratio.
Synchronization Picture mode always uses internal timing; it
is not affected by external sync.
Aspect Ratio Allows choice of 16:9 or 4:3.
1741C Specifications and Performance Verification 5

Specifications
Table 8: Picture monitor outputs (VGA Pix Mon)
Characteristic Performance requirement Reference information
Signal Format VGA DSUB Outputs HD-15 socket connector, standard RGBHV
pin-out. Composite signal is output on the “G”
channel of the connector: signal (+) is pin 2,
signal return is pin 7. Terminate signal in 75
ohms. May use conventional VGA to BNC
cable; output signal will be on the “green” BNC.
Remaining connections (R, B, H, V) carry no
signal.
DAC Resolution 10 bit
Impedance 75 Ωunbalanced
Return Loss on BNCs, Typical >20 db, 300 kHz to 6 MHz, measured at HD-15
connector.
Return loss is affected by the VGA to BNC
adapter cable. Use a high quality 75 Ωcable for
best performance.
Composite Amplitude, Typical 1V ± 5% peak-to-peak when selected input is
driven with a 1V peak-to-peak signal.
Composite mode SNR,Typical 60 dB RMS to 700 mV with 6 MHz BW.
Table 9: LCD display
Characteristic Performance requirement Reference information
Horizontal 13 cmDisplay Area
Vertical 10 cm
Resolution 1024 (H) x 768 (V) pixels
Color Palette 6 bits per component. LSB is dithered to
improve picture
Pixel Defects ≤6 bad pixels
Table 10: External XGA output (EXT DISPLAY)
Characteristic Performance requirement Reference information
Content Identical to front-panel LCD display
Output Levels 0.7 V or 1 V for RGB signals, selectable.
Fixed 5 V for H and V sync signals
Resolution 1024 (H) x 768 (V) pixels
6 1741C Specifications and Performance Verification

Specifications
Table 10: External XGA output (EXT DISPLAY) (cont.)
Characteristic Performance requirement Reference information
Color Palette 6 bits per component
Connector Pin Assignments Pin 1: R
Pin 2: G
Pin 3: B
Pin 4: NC
Pin 5: GND
Pin 6: GND
Pin 7: GND
Pin 8: GND
Pin 9: NC
Pin 10: NC
Pin 11: NC
Pin 12: NC
Pin 13: HSync
Pin 14: VSync
Pin 15: NC
Table 11: LTC time code input / ground closures
Characteristic Performance requirement Reference information
LTC Input Connector Balanced, unterminated via rear-panel GC
remote connector. (See Table 16.)
LTC Input Impedance Greater than 10 kΩ.
LTC Signal Characteristics Longitudinal Time Code per IEC Publication
461.
LTC Signal Amplitude Range,
Typical
0.2 Vp-p to 5.0 Vp-p, balanced differential or
single-ended.
1741C Specifications and Performance Verification 7

Specifications
Table 11: LTC time code input / ground closures (cont.)
Characteristic Performance requirement Reference information
Ground Closure Input Signaling
(Preset Selection)
TTL thresholds, 5 V maximum input,
–0.5 V minimum input. Pull low to assert
Has internal 10 kΩpull-upto5Voneach
input.
Direct or encoded inputs must be asserted
and stable for at least 150 ms to be
recognized reliably. Inputs that are stable for
75 ms or less will never be recognized.
Inputs are sampled every 16.6 ms. Five
consecutive samples must all have the same
code for the code to be accepted. It is
possible to pulse the codes synchronously
with the sampling process and trick the
system. Users are encouraged to work
within the intent of the specification to insure
reliable operation.
Ground Closure Output
Characteristics
One open collector output
Pulledupby10kΩresistor in series with a
diode to + 5 V. Pull down current is limited
by 10 Ωresistor. Maximum current allowed
is 100 mA.
Table 12: VITC decoding
Characteristic Performance requirement Reference information
Sources Composite Input A, B, C, or D
Table 13: External reference
Characteristic Performance requirement Reference information
Input Type Passive loop-through, 75 Ωcompensated.
Operational Locks to 625 and 525 line interlace
Composite sync Analog signals. Reference
must have a frame rate compatible with the
selected input. WFM, VECTOR, and LINE
SEL modes derive timing from the selected
sync reference. Picture mode does not use
the timing from the external reference.
Analog Sync Format 625i/50 PAL and 525i/59.94 NTSC composite
sync signals.
Proper operation only when the display and
reference signals have the same line and
field rates.
8 1741C Specifications and Performance Verification