(Sanitized) CONTRACT (Sanitized)TASK II PRELIMINARY TECHNICAL REPORT ON SIGNAL STRENGTH OF BROADCAST RADIATION OF

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002700030021-8
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 7
• Document Creation Date: December 28, 2016
• Document Release Date: May 18, 2005
• Sequence Number: 21
• Publication Date: November 30, 1964
• Content Type: REPORT

Approved For tease 2005/06/06 : CIA-RDP78BO477002700030021-8
November 30, 1964
Preliminary Technical Report
Item 2. Signal Strength of Broadcast Radiation
of Closed-Circuit TV.
Item 2 Work Statement: Determine test facilities needed
and rental cost and closed-circuit TV equipment needed
and rental cost (if any) on loan arrangements. Determine
what applicable data are available from manufacturers.
Submitted by:
Declass Review by NGA.
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030021-8
 Approved Forlease 2005/06/06 : CIA-RDP78B0477%802700030021-8
as ern
Preliminary Technical Report
1. Introduction
It is not presently known whether or not closed-
circuit TV equipment (CCTV) radiates electromagnetic or
electrostatic signals that would be undesirable under
your contemplated use. Task II item 2 was therefore under-
taken to determine what data was available on common
commercial items and what testing would be required to
obtain adequate data.
Fed Std No. 222 was recently established and it
specified acceptable radiation signal levels. The standard
is an excellent objective criterion. It is subject to
interpretation as to what type of signal is significant
for specific applications.
For your application it appears that only a-signal
with video content would be significant. Switching
transients, synchronizing pulses; and sweep signals with no
video content would be considered non-significant.
2. Summary Review
Test data on electomagnetic emanations from closed
circuit television equipment are not commonly available.
From the little data that is available, it is not possible
to determine if video information is at levels above that
specified in Fed Std No. 222 or if it exists in the emanations
at all. To find out it will be necessary to conduct tests.
A number of commercial environmental laboratories
are equipped to measure the electromagnetic and electro-
static emanations from equipment. The rental rates for
testing in a screen room are approximately $12.50/hour to
$15.651hour for the room and test equipment, plus $12.50/
hour to $15/hour
for a test engineer's time. Fed Std No.
222 is a new spec
and only a few labs are familiar with it
and qualified to
test to it.
Closed circuit television equipment costs between
for one camera and one monitor complete,
excluding cabling and accessories. The high resolution
systems are the more expensive. There are many manu-
facturers and many options in equipment available. The
highest resolution shelf item is about 945 TV lines.
have more experience than most others
in meeting the military RFI specifications for low radiated
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030021-8
-1-
 Approved For.Iease 2005/06/06 : CIA-RDP78B0477Q02700030021-8
noise such as MIL-I-26600. The manufacturers prefer not
to lease-their equipment but generally seem willing to
make demonstration models available for a short period at
no charge for RFI tests if they may receive copies of the
test report.
In order to define more accurately facilities and
equipment required, a pilot test program will be prepared
and submitted at a future date. Actual conduct of the
test by us is not considered as it is not within the scope
of this task. The pilot test will measure the electro-
magnetic and electrostatic video emanations from one
representative CCTV camera and monitor to determine whether
a shelf item conforms to the intent of Fed Std No. 222.
3. Test Data Available
Inquiries were sent to a number of companies request-
ing technical information on closed circuit television
equipment of their manufacture. Particular reference
was made to radio frequency emanations from the equipment
and any tests which would provide pertinent data Only
one manufacturer, STAT
indicated they ha o uc e any ra io frequency noise es s.
had tested a Master Monitor M 17 CR
STAT
with a conductive-coated screen for in
1959. Specifically, they were measuring the interfering
field emanating from the deflection coils of a TV moni-
tor through the CRT face and the attenuation afforded by
a conductive coating on the face.
The conductive coating greatly reduced the electric
field as measured, but radiations for both coated and un-
coated screens were considerably in excess of the limits
quoted in Fed Std No. 222. The conclusions were that the
conductive coating did attenuate the electrostatic field,
but did not attenuate the electro-magnetic field. They
also concluded that more eective attenuation of the
electrostatic field might be obtained with heavier
coatings, but the heavier coatings would obscure the face
of the tube.
The test is a good example of the
problems o determining the conformance of equipments to
the intent of Fed Std No. 222. The detected signals were
identified as narrow band CW and the basic frequency was
the horizontal sweep rate. If the emanations are truly
CW with no video superimposed, then they do not violate
the intent of Fed Std No. 222. There was no indication
that video emanations (which are broadband) were detected
during the tests.
-2-
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030021-8
 Approved ForBJease 2005/06/06 : CIA-RDP78B0477QAP02700030021-8
4. Test Lab Facilities
Inquiries were initiated into the facilities and
equipment available for testing closed circuit TV com-
ponents to Fed Std No. 222. Some of the test equipment
required is new and highly specialized and not many test
labs are equipped. I was told there are only five labs
in the United States qualified to test to Fed Std No. 222.
Two laboratories in the local area appeared to e
the most knowled eable. One was
which is a commercia testing laboratory
specializing in environmental testing. stated
they were fully equipped (except for sound intensity and
subaudio) and qualified to test to Fed Std No. 222 nnj
had two year's experience it. Their rates arel
for equipment, or a test engineer an
hour for a pro g nee r.
The other knowledgeable organization wasi
a is principally for in-house use on their own programs
and scheduling test time would be a problem. I has
not established any rates but indicated that testing to
MIL Std No. 222 was very expensive. The expense, however,
probably results from tryin to qualify equipment to the
required radiation limits. indicated that the expense
and complexity of testing depended on the customer's
interpretation of the Federal Standard.
I indicated that their
was not equipped to test
to Fed Std No. 222. They are planning to equip only one
lab at present and this will be their Washington Development
Center. The address is:
indicated that the 's
new and just getting into operation. He is still in the
process of equipping it and obtaining facility clearance.
He indicated that the piece of classified test equipment
required for Fed Std No. 222 was available to him but was
not yet on-site.
rates arel "or facilit and
equipment for Fed Std No. 222 testing, for
engineering time, and for tes ec nicfan's time.
Approved For Release 2005/06/06- 36IA-RDP78B04770A002700030021-8
 Approved For lease 2005/06/06 : CIA-RDP78B0477QU02700030021-8
Other test labs contacted were either unfamiliar
with Fed Std No. 222 or were evasive. It is entirely
possible, however, that many of them could do an entirely
adequate job of testing for radio frequency emanations
from closed circuit TV equipment for the specific usage
conditions contemplated.
5. Closed Circuit TV Equipment (CCTV)
5.1 has CCTV equip-
ment at many missile bases. Much o their equipment was
developed to MIL-E-5272 and qualified to RFI specification
MIL-I-26600. I would expect their equipment to be about
as low in RFI emanations as any shelf item available.
Model 712 Closed Circuit Television S stem
TV camera model 04-43T with RCA Vidicon tube
and wide angle f/1.2 lens. 17 inch rack
mounted Monitor. Sync generator, camera
control, and remote control station.
Approximate price:
The cabling and accessories are in addition to the above
price. This is a 650 line, 10 megacycle bandwidth system.
5.21
California, have sold equipment that meets RFI spec
MIL-I-26600 but they have not been certified to this
spec and test data are not available.
High Resolution CCTV System TV camera, 3100 series,
with Vidicon tube, self-contained, and wide angle
f/1.4 lens. 17 inch cabinet mounted Monitor
Model HRM 17, shielded for low RFI.
Approximate price:
Cabling and accessories are in addition to above price.
This is a hn h resolution 945 line 20 megacycle bandwidth
system. II will not lease equipment for less than
three mont s and then the cost is high because they must
charge for refurbishing. The Sales Department will make
equipment available for a few days at no charge for an
RFI test, if they can have a copy of the test report.
The monitor is normally the principal RFI offender and
includes shielding, filtering, and sputtered gold
on the tube face as a special order item to reduce noise.
Approved For Release 2005/06/06-:4C'IA-RDP78B04770A002700030021-8
 Approved ForElease 2005/06/06: CIA-RDP78BO477QV02700030021-8
5.3 =makes a line of CCTV equipment but had no infor-
mation regarding radio frequency emanations from the
equipment.
(Type TK202 Basic Indu 1 System
rV-camera type tk202 with hicon tube
and wide angle f/1.5 lens. inch rack
mounted Monitor type TM7ER. Camera control
unit and fan.
Approximate price:
The cabling and accessories are in addition to the above
price. This is a 525 line, 8 megacycle bandwidth system.
Probably no particular precautions were taken to obtain
low radiated noise or high resolution.
5.4 L_ I
makes a line of high resolution CCTV equipment, but they
have not had occasion to measure the radio frequency field
strength emanating from their cameras, monitors, or
cables.
High
Resolution CCTV System TV camera type
24A with vidicon toe and wide angle f/1.9
lens. High resolution 17 inch cabinet mounted
Monitor model 30B-1/17N.
Approximate price:
The cabling and accessories are in addition to the above
price. This is a 945 line or 1029 line, 18 megacycle
bandwidth system.
5.5 Information from several other manufacturers was
received and the foregoing is representative. The higher
resolution systems are considerably more expensive than
the 525 line systems and RFI shielding also costs more.
It would probably be better to use a high resolution
s stem for radiated noise tests. I believe that the
Model 3100 CCTV camera and Model HP.M17 Monitor
wou d provide representative data in a pilot test to
determine the general magnitude of the problem. This is
a high resolution 945 line wide band 20 megacycle system.
It also comes in a shielded version which could be tested
in a second phase if it seemed desirable to obtain data
with the radiations suppressed.
-5-
Approved For Release 2005/06/06 : CIA-RDP78BO477OA002700030021-8
 Approved For.Release 2005/06/06 : CIA-RDP78BO4770A 02700030021-8
6. Remaining Work
A pilot test program will be prepared for the test-
ing of one CCTV camera and monitor in a screen room. The
program will define the tests necessary to determine
whether the equipment conforms to the intent of Fed Std
No. 222.
Approved For Release 2005/06/06": IA-RDP78B04770A002700030021-8