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Sales Representatives in:
New England: Framingham, Massachusetts, Trinity 3-7091
Metropolitan New York, New Jersey:
Jersey City, New Jersey, Journal Square 4 -3574
Upstate New York: Syracuse, New York, Syracuse 4 -2141
Northern Ohio, Western Penn.: Cleveland, Ohio, Atlantic 1 -1060
Indiana, Southern Ohio: Logansport, Indiana, Logansport 2555
California: Pasadena, California, Sycamore 8 -3919
Canada: Montreal, Quebec, Canada, Walnut 0337
PRECISION PAPER TUBE CO.
2057 W. CHARLESTON ST. CHICAGO 47, ILL.
Plant No. 2: I
Flower St., Hartford, Conn.
Color TV
(Continued from page 189)
correct and incorrect delay adjustments.
It is apparent that an
error in Y vs Q delay of .05 secs
(the FCC tolerance) is readily
observed. For I vs Y delay, errors
of .02 secs can easily be detected.
This sensitivity can be matched
by the direct measurement methods
only with a great deal of care.
Decoder Application
The unibar generator encoded
signal with correctly- adjusted delays
is an ideal calibration standard
for receiver delay adjustment
since its self- proving f eat u r e
makes it completely trustworthy.
An adequately sensitive indication
can be obtained by examination
of the picture monitor display for
symmetry of appearance of the
edges of the bar. A more precise
determination might be accomplished
by a special test matrix
of Y, I and Q decoded signals in
opposed -polarity pairs to facilitate
oscilloscope waveform examination
of the residual edge transients
for symmetry.
Optical Radar
(Continued from page 111)
than 360/30 or 12 sides to the
mirror. At present, a 4 -sided mirror
and a maximum scan angle of 30'
are used. Hence, the mirror turns
through 15° for a single full scan.
Since there is 90° between facets,
there is a dead time of 90 -15/90 =
83.3 %.
If it were desirable to keep the
same time scale as real radar
10.8µs /mi. with say, a maximum
scan angle at ì,m, the parameters
would have to be arranged as
i ollows :
1.0 T = time in microseconds.
\I = maximum range in miles.
>ins = maximum scan angle.
190
For product information, use inquiry card on pages 209 -210,
Tele -Tech & ELECTRONIC INDUSTRIES June 1956