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CA1k. I. OWARD W. SAMS PU 3LICATION
OCTOBER 1967/75 cents
Broadcast Engineering the technical journal o/ the broadcast - cc mmunications industry
In three easy steps, you can build your way economically to the same high quality deluxe color sync generator used by the major TV networks. Start out with Riker's basic EIA sync generator-lour modules, rack frame and power supply- $2900. When your budget can afford the expansion, add two more modules for deluxe sync lock and you get the advantage of three selectable speeds for locking to an external composite video or sync signal. Cost: $790.
Now you're all set to step up to color. Add three more modules-$-985-and you have eased into Riker's widely used, field -proven Model 520-4CL Color Sync Generator with Deluxe Sync Lock. You now own the best sync generating system in the broadcast industry.
The Riker module at a time approach is the sensible way to build quality equipment into your facilities. Over the long term it's also the most inexpensive way. If you're interested in details on sync generators, write or call Riker-the one company in the TV broadcast industry offering a complete line of all solid-s:ate instrumentation for video analysis, simulation and control.
how to ease into
a deluxe color sync generator
without straining your
p PRODUCTS FOR VIDEO ANALYSIS, SIMULATION 8 CONTROL
RIKER VIDEO INDUSTRIES, INC., 100 Parkway Drive South, Hauppauge, Long Island, N.Y. 11787 (516) 5435200
Circle Item 1 on Tech Data Card
When it comes to cutting
TV switching costs
-without cutting corners...
COHU's got what it takes!
And that's everything you need-in stock-ready for immediate delivery from a single source.Our modular, off -the -shelf approach to building solid-state switchers is thoroughly proven in use. Cohu switchers now operating include one of the largest ever built-over 14 tons of solid-state gear accommodating 80 inputs and 160 outputs! Just shipped: two identical vertical interval switching systems for Chicago's newest UHF station.
We stock: monochrome/color switching matrix, switcher control and remote control units. Stocked accessories include sync generators, genlock, color standard, colorlock, automatic sync change -over switches, pulse and video distribution amplifiers, dot bar generators, monitors and portable vidicon cameras. Control panels are custom-built to your specifi- cations. Get full details direct or from your nearest Cohu engineering representative.
Box 623, San Diego, Calif. 92112 Phone: 714-277-6700
ELECTRONICS, INC SAN DIEGO' CALIFORNIA
Circle Item 2 on Tech Data Card 3
publisher Howard W. Sams
general manager/sales director Donald W. Bradley
editor William E. Burke
managing editor James M. Moore
associate editor Harold E. Hale
regional editors George M. Frese, Northwest Howard T. Head, Wash., D.C.
Robert A. Jones, Midwest Allen B. Smith, North Central
research librarian Bonny Howland
production E. M. Rainey, Manager
Paul A. Cornelius, Jr., Photography
circulation Pat Osborne, Manager
advertising sales offices
central and midwestern Roy Henry
Howard W. Sams & Co., Inc. 4300 West 62nd St.
Indianapolis, Ind. 46206 291-3100
eastern Alfred A. Menegus
Howard W. Sams & Co., Inc. 3 West 57th St.
New York 19, New York MU 8-6350
southwestern Martin Taylor
P.O. Box 22025 Houston, Tex. 77027
western LOS ANGELES OFFICE
G. R. Holtz The Maurice A. Kimball Co., Inc.
2008 West Carson St., Suites 203-204 Torrance, California 90501
(213) 320-2204 SAN FRANCISCO OFFICE
The Maurice A. Kimball Co., Inc. 580 Market St., Room 400
San Francisco, California 94104 (415) EX 2-3365
foreign LONDON W.C. 2, ENGLAND
John Ashcraft, Leicester Square WHitehall 0525
AMSTERDAM John Ashcraft, Herengracht 365
Telefoon 24 09 08 PARIS 5, FRANCE
John Ashcraft, 9 Rue Lagrange ODeon 20-87
TOKYO, JAPAN International Media Representatives,
Ltd., 1, Kotohiracho, Shiba, Minato-Ku, Tokyo
(502) 0656 Copyright m 1967
by Howard W. Sams & Co., Inc. BROADCAST ENGINEERING is published monthly by Howard W. Sams & Co., Inc., 4300 West 62nd Street, Indianapolis. Indiana 46206. SUBSCRIPTION PRICES: U.S.A. $6.00, one year; $10.00, two years; $13.00, three years. Outside the U.S.A., add $1.00 per year for postage. Single copies are 75 cents, back issues are $1.00.
the technical journal of the broadcast -communications industry
*Broadcast Engineering Volume 9, No. 10
Color -TV Basics-Colorimetry A series presenting the fundamental concepts involved
in color transmission begins in this issue.
Radio Broadcasting on Medium Frequencies This examination of medium -frequency
broadcasting places emphasis on the propagation mechanism: involved.
Alfred F. Barghausen, 20 James W. Finney, and Ronald M. Fisher
A System for Separate Repeater Origination W. H. Lindenbach 42 A Canadian broadcasting organization uses
tape -cartridge equipment to originate separate announcements over its
main and repeater stations.
Engineers' Exchange 6
Washington Bulletin 53
News of the Industry 58
New Products 67
Engineers' Tech Data 73
Advertisers' Index 76
Classified Ads 77
Soccer is the newest dimension in color sportscasting. This month's cover shows a pickup (by CBC) of a soccer match for CTV, Canada's private color network. An
RCA color camera is covering a game between England and Mexico in the
new "Autostade" at Montreal, directly outside the Expo '67 grounds.
(Photo courtesy of RCA)
Look what your cameras can do with display units like this CBS Laboratories' Digital Display Units are part of a low cost, compact system that works daily wonders in any size TV studio!
30,127 26,480 5 3%
ELECTIONS -No contest. These modular units were designed specifically for TV use to give optimum clarity up to 70 feet - from any camera angle up to 145 degrees.
7 2 °
FAI R WEATHER -Cool operation. Only 2.7 watts required per unit, with no power between post- ings. Glare -free even under the strongest lighting conditions.
And all operated by one Controller that can handle 192 units - as many as 12 groups of 16 units each. This means up to 12 two -candidate election races; or runs, hits and errors for all major league teams; or 40 local stock issues plus volume and Dow Jones closing. A one-time investment for the professional way to take care of all your daily display needs.
Our engineers will even design your system for you. Don't take our word for it. Write or call us collect (203) 327-2000, and let us show you.
8 6 6.4 7
9,5 6 4,5 0 0 STOCK REPORTS -Excellent for the long pull. Rugged electro-mechanical operation is fool -proof and built to last. No bulb burn -out or the other problems of rear -illuminated displays.
12 SPORTS -An easy set-up. Just stack these units in a flat to suit any requirement. Custom designed matrix wiring also available for complete flexibility.
PROFESSIONAL PRODUCTS LABORATORES
'4 Stamford, Connecticut. A Division of Columbia Broadcasting System, Inc.
Circle Item 3 on Tech Data Card 5
with the new
The use of controlled rever- beration has gained wide ac- ceptance in the professional recording field because the use of reverberation in several microphone channels pro- duces records that have wide audience appeal. Simply stated: reverberated sound produces hit records. Sec- ondly, reverberated sound is apparently louder than the same non -reverberated signal.
The use of reverb in broad- casting and sound re -enforce- ment is becoming equally more popular for the same reasons: A more pleasing commercial sound and pro- duction of a signal that is ap- parently louder for the same signal level.
TWO COMPACT REVERB SYSTEMS...
Now FAIRCHILD has created two electro-mechanical reverberation systems that produce a sound, termed by recording studio mixers -the experts who know what they hear, as "extremely natural sound possessing the quality of good acoustical reverb chambers." The two models differ more in their flexibility and cost rather than in reverberation effect.
MODEL 658A The 6588 is a complete solid
state reverberation system with electronically controlled reverb
time adjustments up to 5 seconds; mixing control tor
adjustment of reverberated to non -reverberated signal ratios;
reverb equalization at 2. 3 and 5 KHZ. Size: 241/2 x 19"
MODEL 658B Compact, reverberation system for the 'big' sound in a small space. Contains reverb equalization in mid and low frequency range; level control; solid state design. Size, Only 51/a x 3 x 10" deep.
The "sound" of the Model 658A and 658B REVERBERTRONS will satisfy the most de- manding audio engineer. Their pricing and size makes them even more appealing.
Write to FAIRCHILD-t