VM700T (turbo) Option 1S/2S

Serial Digital Video

Measurement Set

Serial Digital Options

Options 1S and 2S are

VM700T and VMUPG upgrade options that add a state-of-the-art serial digital video acquisition and analyzer module to a new VM700T or Turbo version VM700A video measurement set, providing the capability to display, capture and analyze the 270 and

360 Mbit 525 line and 625 line serial component and

143 Mbit 525 line serial composite digital video signal with unprecedented ease and accuracy. Now, for the first time, comprehensive analysis of analog video signals and serial digital video signals is possible in a single package that is the recognized leader in automatic video measurement sets worldwide. The features built into the new

VM700T/A series SDI analyzer module are the result of years of experience with professional television organizations, and in the designing and manufacture of advanced waveform/ vector monitors and automatic analyzers for the serial digital video operating environment.

Ease of use

The new VM700T/A Serial

Digital Video measurement option benefits from the proven display technology and user interface that won a technical Emmy for excellence. All SDI (Serial Digital

Interface) measurement functionality was designed with the highest degree of automation possible. The seasoned professional video equipment manufacture to the first time

SDI design engineer will find the VM700T/A SDI analyzer option innovative, accurate, fast and above all easy to use.

Many Capabilities

The VM700T/A Serial Digital

Video Analyzer module installs directly into a

VM700T or Turbo version

VM700A. I/O connections are accessible on the instrument rear panel and include two

SDI inputs, a re-clocked SDI output (switches with the active SDI input), an AES digital audio input, a Longitudinal Time Code input for time stamping logged error files, and a loop-through analog blackburst input for timing reference. SDI measurement applications can be

FEATURES AND BENEFITS

Automatic Analysis of 270 Mbit

Component, and 143 Mbit

Composite and 360 Mbit Component

Serial Digital Video Signals

Continuous Real-Time Format

Analyzer with Event Logging and

Frame Capture

Serial Data Transport Interface

(SDTI) Analysis Standard

Eye Diagram Display with Automatic

Limit Violation Detection

Jitter Measurements with Wide

Band Spectral Analysis

Ancillary Data Analyzer with Full

Frame Data Distribution Display

Conformance testing to

SMPTE 259M

AES and Embedded Digital Audio

Measurements

Parade, Stacked and Overlay

Displays with Interpolated

Waveforms

SMPTE RP-165 Digital Error

Detection and Reporting

Audio-to-Video Delay Measurements on AES or Embedded Audio

Picture Mode with Relative to

Reference Capability

Relative to Reference Modes

Longitudinal Time Code Input for

Time Stamping Error Events

Video Wander Measurement

Copyright © 1999 Tektronix, Inc. All rights reserved.

page 2 selected through the instrument front panel, touch panel interface or RS232C or GPIB remote control drivers. Simple to complex SDI measurement functions can be created directly from the

VM700T touch panel interface. Functions can be enabled manually, automatically using the system’s internal clock, or via remote control. Users who need to create and distribute VM700T SDI measurement functions to additional VM700Ts will appreciate the FTP interface that allows file transfers.

SDTI (SMPTE 305M) Serial Data

Transport Interface Analysis

SMPTE 305M specifies a

Serial Data Transport Stream that can be used to transport packetized data within a studio/production center environment. The data packets and synchronizing signals are compatible with

ANSI/SMPTE 259M and can therefore pass through existing plant routing equipment.

The growing use of SDTI to transfer digital video at faster-than-real-time rates with none of the compression artifacts found in MPEG provides tremendous potential to post/production applications.

The VM700T Ancillary Data

Analyzer application can automatically detect the presence of the SDTI signal as well as decode the SDTI

Header data information for quick proofs of the SDTI transport layer. Line number, line number CRC, code and

AAI, Destination address,

Source address, Block type,

CRC flag, Data extension flag,

Reserved data and Header

CRC are all decoded and clearly displayed.

Eye Diagram

A fundamental requirement of any serial digital video measurement set is the ability to verify the electrical characteristics of the SDI transport layer. The VM700T SDI option allows comprehensive analysis of the serial digital transport layer with a high resolution, equivalent time sampled Eye Pattern Diagram. The Eye Pattern application allows direct observation and verification of the analog characteristics of the serial data signal while simultaneously providing full automatic measurements of all critical signal parameters.

Signal level, rise and fall time, rise and fall overshoot,

Jitter, and DC offset of the serial data stream are continuously measured and plotted on the VM700T/A crisp, high resolution CRT display. All

Eye parameter measurements are continuously compared against user programmable limits providing instant notification of an out-of-tolerance condition. An additional Eye monitoring display allows quick visual indications as well as logging of all out of limit errors. For a more detailed analysis of the Eye

Diagram, voltage and timing cursors are available allowing for direct manual measurements. Selection of 10Hz and

1khz filters, equalizer on-off, an automatic cable length meter and the ability to select or deselect specific portions of the Eye Waveform for display complete this application.

SDI Jitter Testing

Jitter in the serial digital signal can occur as it is processed by distribution amplifiers, routing switchers and other digital processing equipment that operate directly on the signal exclusively in its serial form. The

VM700T SDI Jitter application provides analysis of SDI

Jitter in multiple ways. Peakto-peak alignment and timing

Jitter of the SDI transport layer are continuously measured and displayed in either

UI (Unit Intervals) or time. As recommended by SMPTE practices 1 Hz and 1 kHz selectable clock recovery bandwidths are available. Isolation of Jitter sources is the first step in diagnosis and elimination. Therefore, the

VM700T SDI analyzer includes a Jitter spectrum display with over 100 times the spectral range of any competitive device for detailed analysis and identification of all Jitter frequency components. Additionally, a unique Jitter waveform display provides the means to identify line or frame correlated Jitter. Cursors are provided to allow precise measurement of Jitter events in both frequency and time. An extremely useful relative to reference mode is also provided allowing up to two Jitter measurement references to be stored internally and used for difference measurements with one of the two

SDI inputs.

Real-Time Format Monitor

Monitoring for SDI format violations helps ensure trouble free communication between serial digital devices. Random errors in timing signal placement or other types of data errors, for example, can mean trouble in a data recovery circuit. The

VM700T SDI format analyzer provides the continuous, real-time format monitoring capability required to quickly diagnose those hard to find format errors in the serial digital signal. A wide range of individual checks are performed with error conditions quickly identified in a highly visible, easy to read monitoring display. Monitoring checks include loss of signal, loss of lock, video line, blanking and field length errors, EAV/SAV misplacement, ancillary data errors, audio ancillary data errors, illegal luminance and chrominance values with selectable search areas, 8/10bit validation, RP-165 validation, errored seconds with time counter, event logging, frame capture on user definable events, and pattern search provide a total validation of the SDI signal format.

Ancillary Data Analyzer

Once problems are identified by the Real-Time Format

Monitor, the Ancillary Data

Analyzer can be automatically enabled to provide a more detailed level of analysis and diagnosis capability.

The primary display of the

Ancillary Data Analyzer provides a complete analysis of all data, including field, line and sample number, data type, data values and interpretation of data value. Data errors are immediately sensed, logged and indicated in easy to see “bright up” boxes. A “Find Errors” window scans forwards or backwards in the display buffer, locating and providing a detailed text interpretation of all data errors. A “Find Data

Pattern” search mode can be programmed to automatically search and locate specific data patterns as opposed to time intensive manual searches. The Ancillary Data

Analyzer may also be optimized to display only specific data types, for example

AES Audio packets or EDH data, ensuring the display remains simple and easy to interpret. To help debug buffer overflow problems in audio devices, the Ancillary

Data Distribution Analyzer provides real-time verification of the ancillary data distribution pattern within a video frame.

SDI Waveform mode

The SDI Waveform mode further extends the capabilities of the VM700T SDI option by providing a real-time display and analysis of the decoded video waveform. Overlay,

Parade and Stacked waveform displays of individual video lines in equivalent analog form allows complete evaluation of the video signal, including the ancillary data region, in a traditional manner. Setup of digital sources is now as easy as if they were analog. Waveforms can be displayed in either

“Bar” style, similar in look and feel to a logic analyzer display, or with interpolation, providing a smoother analog look and feel. The

“Bar” display style is useful when using the user selectable sample cursors to provide readouts of video sample values. Samples may be displayed in 8 bit or 10 bit mode in Hex, Binary or Decimal number base. Timing cursors may be used to determine the exact timing of any two points on the video waveform. The interpolated waveform mode is extremely useful for evaluating the analog characteristics of the component digital signal. Pulse shape, frequency response, insertion gain, rise and fall times and Inter-channel timing of the decoded signal can be quickly assessed.

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SDI Lightning Display

Pressing the VM700T front panel Vector button selects the Tektronix-patented Lightning display. The Lightning display helps operators quickly setup color difference component recorders using only the color bar test signal.

Interchannel Timing

The Interchannel Timing application is designed to quickly measure time delay between two SDI sources or between one SDI source and the analog black-burst reference input. Timing measurements are made in real-time and in-service without special test signals. An easy to read auto-scaling display indicates time delay in time or video frames.

Audio-to-Video Delay

The irritating time delay that accumulates between the audio and video content of a television program during signal transport or the postproduction process can be extremely difficult to quantify. Subjective analysis requires skilled operators and is seldom accurate to more than a single video frame.

The VM700T SDI Audio-To-

Video Delay application provides a simple, out-of-service measurement solution to this problem. Simultaneous audio and video test signals, available from the Tektronix

TG2000 signal generator, sent through the system under test, are received by the

VM700T SDI analyzer module and decoded. Up to plus or minus 2.5 seconds of time delay can be measured between the special audio and video test sequence.

Time delay is indicated in video frames and milli-seconds and displayed on an easy to read bar graph. Measurements are made on embedded or AES audio signals and a relative-to-reference mode allows normalizing to any delay.

SDI Wander

Video sync timing “wander” is a common problem with video that has been transported over a digital distribution network. Subtle shifts in picture hue or, in extreme cases, temporary picture unlock, can result if variations in the horizontal sync frequency timing is not held to within acceptable limits.

The VM700T SDI Wander application provides a simple and efficient method for the verification of SDI frequency timing stability for contribution quality video applications. No special test signals are required. Absolute frequency offset and frequency drift rate measurements are made directly on the SDI signal. Accurate frequency measurements to within 100 ppb can be made. Display limit markers indicate peak Frequency Offset in ppm and Hz

@ Fsc over the past 17 seconds. Frequency Drift-rate measurements are reported in ppm/sec and Hz/sec @ Fsc.

Digital Audio Measurements

The VM700T SDI analyzer option includes a Digital

Audio measurement application. Audio level, audio frequency, total harmonic distortion plus noise, level difference and Inter-channel phase of the AES digital audio or embedded digital audio signal can be measured. An easy to read display automatically updates all audio measurement results, clearly indicating violations of user programmable limits and audio bit activity.

For precise error documentation, logging mode may be enabled with Linear Time

Code time-stamping capability. For a more detailed analysis of the digital audio signal the Audio Format Analyzer may be selected. The

Audio Format Analyzer provides a waveform display of two digital audio channels, in addition to analysis of audio channel status, decoding of user data bits, identification of parity errors, code violations, and invalid samples.

Picture mode

Picture mode allows a quick visual verification of the SDI signal source. A bright-up line select feature helps finding any desired video line for testing. Additionally, a relative-to-reference mode is included that displays the differences between the active picture and a stored picture, including differences outside the active video region.

Rear Panel I/O Diagram page 5

VM700T

Option 1S/2S

Input

Specifications

CHANNEL A

CHANNEL B

CHANNELS A & B

SDI-OUT

Physical – 2 BNCs (loop-through).

Electrical –

Input Impedance: 75

Ω

.

Return Loss:

> 25 dB from 1 – 360 MHz, channels on or off, power on;

> 15 dB from 1 – 360 MHz, channels on or off, power off.

Insertion Loss: > 0.2 dB from 1 to 360 MHz.

Physical – 1 BNC (terminated).

Electrical –

Input Impedance: 75

Ω

.

Return Loss:

> 25 dB from 1 – 360 MHz, channels on or off, power on;

> 15 dB from 1 – 360 MHz, channels on or off, power off.

Signal –

Format: 143 Mb, 270 Mb Serial Digital

Video per SMPTE 259.

Clock Tolerance: ±20 ppm.

Launch Amplitude: 800 mV ± 20% OR,

Cable Loss: 19 dB loss at 135 MHz wrt

800 mV p-p launch amplitude.

ANALOG BLACK-BURST

Physical – 2 BNCs (loop through).

Electrical –

Input Impedance: 75

Ω

.

Return Loss: > 30 dB from 1 – 6 MHz, power on or off.

Signal –

Format: 525 / 625 line analog composite video.

Input Amplitude: ±6 dB wrt. 1 V p-p video.

AES-IN

Physical – 1 BNC.

Electrical –

Input Impedance: 75

Ω internally terminated.

Return Loss: > 15 dB from 0.1 – 6 MHz, power on or off.

Signal –

Format: 48 kHz AES3 digital stereo audio per SMPTE 276.

LTC

Physical – 1 Mini-Xlr.

Electrical –

Input Impedance: 20 k

Ω internally terminated.

Signal –

Format: Longitudinal Time.

Code per IEC pub. 461.

Speed Range: 0.5x to 5x real-time.

Physical – 1 BNC.

Electrical –

Input Impedance: 75

Ω

.

Return Loss:

> 25 dB from 1 – 360 MHz, channels on or off, power on;

> 15 dB from 1 – 360 MHz, channels on or off, power off.

Signal –

Format: 143, 270, Serial Digital Video per

SMPTE 259.

Clock Tolerance: no worse than selected input signal.

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VM700T

Option 1S/2S

Measurement

Performance

Specifications

EYE DIAGRAM

Amplitude Measurements –

(AC coupled)(averaged)

Range: 80 mV-1.0 V.

Amplitude Accuracy: ±5% @ 800 mV p-p

.

Rise-time Measurements –

Accuracy: ±100 ps for signals with rise-times of 400 ps-1.5 ns.

Aberrations: <10%, 800 mV p-p step.

Timing Measurements –

Cursor Accuracy: 0.1 ppm ±20 ps.

Resolution: ± 40 ps.

Jitter High-Pass Filtering – 10 Hz ,1 kHz.

JITTER MEASUREMENT

Demodulated Waveform –

Bandwidth: 10 Hz-10 MHz.

Range (P-P) – 2 UI (4 ns @ 270 Mb), 50 Hz-

10 MHz, 5 UI at 10 Hz linearly decreasing to

2 UI at 50 Hz.

Accuracy (RMS) – 10% measured on sinusoidal jitter freq 10 Hz-10 MHz.

Numeric Resolution – 20 ps.

Jitter High-Pass Filtering – 10 Hz, 1 kHz.

SDI WANDER MEASUREMENT

Nominal Input Freq. – 143 Mb, 270 Mb.

Tolerance – ± 3%.

Frequency Offset Accuracy – ±0.1 ppm.

Drift Rate Accuracy – ±5 ppb/sec.

SDI INTER-CHANNEL TIMING

Digital to SDI Analog Ref Input –

Accuracy: 400 ns.

Maximum delay: 1 frame (digital always assumed to be behind analog).

Digital to digital – (SDI channel A input to

SDI channel B input)

Accuracy: ±1 sample.

Maximum delay: 1 frame.

AUDIO-TO-VIDEO DELAY

Accuracy & resolution – 200 µs.

VM700T

Option1S/2S

Ordering

Information

OPTION 1S AND 2S ORDERING INSTRUCTIONS

To order a new VM700T with Serial Digital

Video measurement capability order a

VM700T with option 1S. Note: As a minimum, all new VM700Ts must be ordered with either or both analog option 01

(NTSC) or option 11 (PAL) installed.

To upgrade an existing VM700T (serial numbers B020100 and above) to Serial Digital Video measurement capability order a

VMUPG option 1S.

To upgrade an existing VM700T (serial numbers below B020100), and any Turbo version VM700A to Serial Digital Video measurement capability, order a VMUPG option 2S.

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For further information, contact Tektronix:

Worldwide Web: for the most up-to-date product information visit our web site at: www.tektronix.com

ASEAN Countries (65) 356-3900; Australia & New Zealand 61 (2) 9888-0100; Austria, Central Eastern Europe, Greece, Turkey, Malta,& Cyprus +43 2236 8092 0; Belgium +32 (2) 715 89 70;

Brazil and South America 55 (11) 3741-8360; Canada 1 (800) 661-5625; Denmark +45 (44) 850 700; Finland +358 (9) 4783 400; France & North Africa +33 1 69 86 81 81; Germany + 49 (221) 94 77 400;

Hong Kong (852) 2585-6688; India (91) 80-2275577; Italy +39 (2) 25086 501; Japan (Sony/Tektronix Corporation) 81 (3) 3448-3111; Mexico, Central America, & Caribbean 52 (5) 666-6333;

The Netherlands +31 23 56 95555; Norway +47 22 07 07 00; People’s Republic of China 86 (10) 6235 1230; Republic of Korea 82 (2) 528-5299; South Africa (27 11)651-5222; Spain & Portugal +34 91 372 6000;

Sweden +46 8 477 65 00; Switzerland +41 (41) 729 36 40; Taiwan 886 (2) 2722-9622; United Kingdom & Eire +44 (0)1628 403300; USA 1 (800) 426-2200.

From other areas, contact: Tektronix, Inc. Export Sales, P.O. Box 500, M/S 50-255, Beaverton, Oregon 97077-0001, USA 1 (503) 627-6877.

Copyright © 1999, Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specification and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc. All other trade names referenced are the service marks, trademarks or registered trademarks of their respective companies.

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