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Tektronix VM700T Product Information
Tektronix VM700T Product Information

Tektronix VM700T Product Information

Video measurement set option 11 pal video measurements
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Recognized with eight technical
Emmy awards and one Oscar for
outstanding contributions to the
television industry, Tektronix
world class core competencies
have enabled it to design and
deliver the most comprehensive
solutions in the industry.
The VM700T is a product of this
core competency. Recognized as
the defacto industry standard that
keeps pace with evolving cus-
tomer needs, the VM700T is a
total solution for your baseband
1
video and audio
monitoring and
measurement needs. Features
such as an extremely fast and
fully automatic measurement
mode as well as full manual oper-
ation provides the first time user
as well as the seasoned profes-
sional an unequaled value for their
test and measurement investment.
Automatic video measurement set
The VM700T Auto mode makes
standard video transmitter mea-
surements quickly and automati-
cally, including those specified
in CCIR Rep. 624-1, Rec. 567,
and Rec. 569. Both vertical inter-
val and full field measurements
can be made and compared with
1
Option 40 audio measurement package.
Copyright © 1996, Tektronix, Inc. All rights reserved.
VM700T (turbo)
Video Measurement Set
Option 11
PAL Video Measurements
user-defined limits. A dual limit
verification system is employed
to generate a caution or alarm
message when either limit is vio-
lated. Reports can be generated
and printed automatically at
operator scheduled times or trig-
gered from a conditional event.
Graphic displays of measurements
Measure mode provides virtual
real time graphic displays of
measurement results automati-
cally. Vertical interval or full
field measurements including
noise spectrum, group delay,
K-factor, differential gain and
differential phase are presented
as clever, easy to understand
interactive digital displays. Such
displays are indispensable when
extremely fast measurement
update rates (up to 30 times a
second) are required to provide
instant feedback of critical
adjustments and analysis of
signal variations. User definable
limits are visually integrated into
each graphic display and can be
used to trigger a measurement
report or a user definable macro
function. Such a function can,
for example, dial out through a
Many capabilities in one instrument
– Digitizing waveform monitor
– Digitizing vectorscope
– Picture Display
– Group delay and frequency
response
– Noise measurement set
– Automatic measurement set
Auto mode
– Unattended monitoring of PAL
video signals from studios, STLs,
Earth Stations, and transmitters
– User-specified limits
Measure mode provides graphic
display of measurements
– ICPM
– K factor
– Differential gain and phase
– Chrominance to luminance delay
– Noise spectrum
– Group delay with sin x/x
– Color bars
– Relative to reference on most
measurements
– Configurable for all standard
test signals
Award winning user interface
State-of-the-art architecture
Extremely fast update rate
Parallel and serial printer ports
Three input channels
Channel difference modes
External VGA display port
Fully documented remote control
operation
Hardcopy for analysis and
documentation

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Summary of Contents for Tektronix VM700T

  • Page 1 The VM700T is a product of this Graphic displays of measurements core competency. Recognized as Measure mode provides virtual the defacto industry standard that...
  • Page 2: Specifications

    Remote Operation or the burst of one of the other two channels or continuous The VM700T has a powerful and subcarrier. The phase difference fully documented remote control between the selected channel and language. The VM700T can the reference is always displayed.
  • Page 3 Sound In Sync ON Sound In Sync ON In Vector Mode, the VM700T becomes a digital vectorscope with an electronic graticule. The “Color Bar Search’’ feature makes it easy to quickly display a line containing a color bar test signal.
  • Page 4: Measure Mode

    MEASURE MODE BAR LINE TIME Measurement Range Bar Level (b1 or Back Porch) 300 mV to 1.4 V Sync Level 50 mV to 600 mV Sync to Bar Top 350 mV to 2 V Sync/Bar Ratio 10% to 125% 100% nominal Bar Tilt (Rec 569) 0 to 20% Line Time Distortion...
  • Page 5: Chrominance Non-Linearity

    MEASURE MODE (continued) CHROMINANCE NON-LINEARITY Measurement Range Chrominance Amplitude 0 to 100% Chrominance Phase 0 to 360 deg Chrominance to Luminance –50 to +50% Intermodulation Chrominance Nonlinearity Chrominance Nonlinearity Line = 331 (SIS mode) Line = 331 (SIS mode) Chrominance Amplitude Error (%) Chrominance Amplitude Error (%) Ref = 420 mV Packet Ref = 420 mV Packet...
  • Page 6: Frequency Response And Group Delay

    MEASURE MODE (continued) FREQUENCY RESPONSE AND GROUP DELAY Absolute Measurement Range Accuracy Frequency Response to 5 MHz ± 40 dB to 6 MHz ± 40 dB Group Delay to 5 MHz ± 1.0 µs to 6 MHz ± 1.0 µs Group Delay &...
  • Page 7: Line Frequency

    MEASURE MODE (continued) K-FACTOR Measurement Range 2T Pulse K-Factor 0 to 10% Kf –10 to +5% KPB Pulse to Bar Ratio 10 to 125% Pulse Half Amplitude Duration (HAD) 100 to 500 ns 2T Pulse K Factor (Sync = B) 2T Pulse K Factor (Sync = B) Wfm -->...
  • Page 8: Noise Spectrum

    MEASURE MODE (continued) NOISE SPECTRUM Measurement Range Unweighted Signal-to-Noise –20 to –80 dB (5 MHz Low Pass) Luminance Weighted Signal-to-Noise –20 to –80 dB (5 MHz Low Pass and Unified Weighting) Chrominance Weighted –20 to –80 dB Signal-to-Noise Noise Spectrum (Sync = B) Noise Spectrum (Sync = B) Line = Line =...
  • Page 9: Auto Mode

    AUTO MODE LINE BLANKING TIMING MEASUREMENTS These measurements are all made on samples acquired from the live signal area. With the exception of Line Sync Rise Time and Fall Time, these measurements are made in accordance with CCIR Report 624-1. Measurement Range Color Burst Duration...
  • Page 10 –5 –10 –15 –20 –25 –30 –35 –40 – 45 –50 –55 Unified Unweighted filter response curve per CCIR Recommendation 567. Chrominance Weighting filter response curve per CCIR Report 637-2. –2 –4 –6 –8 –10 –12 –14 Unified Luminance weighted filter response curve per CCIR Recommendation 567. –5 –10 –15...
  • Page 11 ICPM (Rel Blanking) Field Time Dist Measurement results are displayed in an easy-to-read format indicating the time, signal source, measurement, and whether the measured value exceeded caution (*) or alarm (**) limits. VM700T Video Measurement Set 07-Aug-96 19:06:58 VM700T Video Measurement Set...
  • Page 12: Measurement Methods

    Line Blanking Timing Waveform Measurements. Field Blanking Timing Waveform Measurements. Measurement methods The following paragraphs specify the methods for each Option 11 measurement. Where appropriate, reference is made to the relevant CCIR recommendation. Field blanking timing measurements Line blanking timing measurements Color Burst Duration: Measured between the half-amplitude points of the burst chrominance...
  • Page 13 Other timing measurements Bar Rise Time: Measured between the 10% and 90% points on the leading edge of bar. See element B2. Amplitude and phase measurements Sync Amplitude Error: Measured as the difference between the sampled sync pulse amplitude and a nominal 300 mV amplitude.
  • Page 14 Element F, G1, and G2 (CCIR Recommendation 567). Element D1 and D2 (CCIR Recommendation 569). C/L Gain Inequality: Measured as the difference between the sampled peak-to-peak ampli- tude of the 700 mV (nominal) chrominance packet (G1 or G2) and the sampled amplitude of the luminance bar (also nomi- nally 700 mV).
  • Page 15: Ordering Information

    Option 3Z — Probe Adapter (3 each of 067-1429-00) VM700T Software Utilities VMBKUP — VM700T Backup Utility VMREMGR — Remote Graphics Software for the VM700T VMT — VM700T Remote Control Software Optional Accessories VM7FC1 — Field installable conversion kit to convert rackmount unit to cabinet.
  • Page 16: For Further Information

    Please visit www.tek- tronix.com Copyright © 2005, Tektronix, Inc. All rights reserved. Tektronix products are covered by U.S. and for- eign patents, issued and pending. Information in this publication supersedes that in all previously published material.