PRODUCTION SPECIFICATION FOR DIGITAL DISPLAY UNIT, DR-1

• Document Type: CREST
• Collection: General CIA Records
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78-03330A004100010002-9
• Release Decision: RIFPUB
• Original Classification: C
• Document Page Count: 6
• Document Creation Date: December 22, 2016
• Document Release Date: February 8, 2012
• Sequence Number: 2
• Publication Date: February 23, 1962
• Content Type: MISC

Declassified and Approved For Release 2012/02/08: CIA-RDP78-0333OA004100010002-9
CONFIDENTIAL
Specification No. 62-A-1140-A
PRC?UM10111 SPECIFICA'a^7CH
FOR DIGITAL DISPLAY UNIT, DR-1
ORIGINAL CL V
^ DECL X
Y.-wig
EXTB
REASON ----
MAR
DOC REV DATE 1g 1980 BY AG E
ORIG COMP OS~. UPI TYPE,_'_!s!
ORIG CLASS 11__ PAGES REV CLASS L"
JUST -.'AjmQ, NEXT RCV 42/Q AUTH: HR 704
Dated: 23 February 1962
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1. DESCRIPTION OF SYSTEM
CON DENTIAL
The )R-1 is a miniature receiving device which displays numerical messages.
The display panel consists of numbered lamps illuminated in accordance
with information contained in coded audio tones. The tones are supplied
by an associated radio receiver, which is not part of the display unit.
These tones are generated by a companion unit, DT-l, and sent as amplitude
modulation by a distant high frequency transmitter. To use the DR-i, the
operator connects it to his receiver audio output and tunes the receiver
to the distinctive tone signal being transmitted on a prearranged fre-
quency. The modulation and coding technique used in this system has been
fo th effective in the radio environment for which it is intended.
2. REQUIREMENTS
A retlairement exists for 100 production DR-I digital display units with
instruction manuals and accessories. This production shall be accomplished
in do phases. Phase I shall consist of the fabrication of five units
built to production drawings. Upon acceptance of these units by the
customer, the fabrication of the remaining 95 units shall constitute
Phas;-:! II. The performance of production units must be equivalent to or
bettor than that of a prototype to be supplied as Government furnished
equipment. In the interests of improving reliability and with the ap-
proval of the contracting agency the contractor may employ design or
packaging techniques which differ from those used in the prototype, ex-
cept that:
2.1. Electrical compatibility with the associated receiver and tone generating
equipment (DT-1)., must be maintained.
2.2. Display and control functions of production units must be identical to
those on the prototype.
2.3. The method of attaching batteries to the DR-1 shall be essentially the
same as that used in the prototype.
3. QUALITY OF FABRICATION
3.1. MIL Specifications
The fabrication of this equipment shall. compaly with the requirements of
MIL specifications in effect on the date of initiation of the contract
except in those cases where this specification differs from the MIL spec-
ifications or a waiver of MIL specifications requirements has been au-
thorized by the Government in accordance with paragraph 3.2. This spec-
ification shall have precedence over MIL specifications in the event of
difference.
3.2. Waiver of MIT, Specifications
In the interest of econonr and/or improved performance, waivers of MIL
specifications may be authorized but only after review by the technical
representative of the Contract Officer.
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UUNI-IULNTIAL
3.3. P1~ Treatment
AU material used in the At-1 shall be non-nutrient to fungus. If it is
determined that suitable non-nutrient materials are not available, a waiver
many be obtained; however, any nutrient material used shall be treated by
a suitable f ungus-resistant eo iound after machining or forming and prior
to Installation.
4. ENV:IROAL
After a warm-up, period of five seconds the ER-i shell meet the perforaence
require Bents of this specification while subjected to any of the following
co ditions successively or in combinations likely to be encountered during
worldwide operation and storage.
4.1. 2PMGxation
Continuous operation for a period of one year altercating six hours on and
two hours off with no more than. normal nsirtemance and repLac. nt of bat-
teries and parts.
4.2. Temigeraftre
The IE-l shell operate normally in all respects in a temperature range from
-20?C to +40'C, after soaking for four hours, and shall be capable of being
stored over a temperature range of .60?C to +60?C. The foregoing require-
went shall. not apply to the battery power supply of the DR-l.
4.3. Relative Me dity
The nt-1 shall operate normally in 95f. relative humidity.
4.4. Elevation
The E-1 shall operate noreslly at elevations up to 15,000 foot above sea
4.5.
Vibration.
The ER-1 shall. operate without impairment after being subjected to vibrations
from 5 to 500 cps and having a double amplitude of .01 inches with a msximm
acceleration of 2g, vbiehever is the limiting value.
4.6. Shook
5?
The ER-1 shall operate without impairment after dropping through an angle
of 30? to a solid 2-inch fir table top using any edge of the case as an
axis.
EIECl'RICAL CHARAC CO
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CONFIDENTIAL
5.1. Txr ut Characteristics
5.1.1. The input impedance of the ER-1 shall be 2,4000 ohms.
5.1.2. The 1St-1 shall operate properly with a 0.3 volt rues signal at a 3 db
signal-to-noiae ratio. The unit shall operate properly over an input
level range of 0.3 volts race to 10.0 volts run. (Note: Proper operation
is defd, as 100% copy under teat when connected directly to the DT-1)
Si. 1 ( racterratics
5.2.
Each digit transmitted is represented by a composite signal consisting
of four sequential tones each of which is h0 milliseconds in duration and
which are separated by 40 imilli.seconds. Me transmitting speeds of the
t-1 s fie 77, 10 or 12 wpm. use different speeds are obtained by
varying the spacing between groups of binary tones. The different spac-
ings are: 2,120, 1,320, 920, and. 729 nlliseoonds, respectively.
5.2.1. TV* tones are used with frequencies of 1000 cps and 1100 cps. The ID'-1
tone generator maintop the accuracy of these tones to within t3 cycles.
5.2.2.
Mm
The digits to tted are represented by the following binary code.
In the table below "0" represents a 40 millisecond 1,000 cps tone, and
"1" represents a 40 millisecond 1100 cps tone.
Number
der
1
2
0000
0001
0011
1001
1000
1101
0010
1100
1111
CONFIDENTIAL
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r g
C
Sul ]Lot and Current Drain
The DR-1 shall operate properly on supply voltages which range fran 2.0
vo3.tz. to 302 volts with the maximum current & rain not ee::ceed 200
milliamperes
6. PHYSICAL CMACTMISTICS
Control Panel
The ? o ntrol and display panel of the existir 3 prototype -shall be used in
production models. The only operator control on the DR-i is an on-off-test
switch. The test position allows the operator to determine whether his
battery is usable by observing a test lamp V:~ni Ch flashes when the momentary-
hold test s tch is depressed.
u f3 o Battery Holders
The battery supply for the DR-1 shau cards ~, of two external size "D"
batteries U They ay be held in place by tw+ --hinged doors: which fold out
from the bottom of the DR-1 as In the protoi,- unit a Rover, the con-
trnef.ur, .n. order to facilitate piuction, my probe .anther type of
battery holder using the Sam concept. The ` .ttery holder shall. be cap-
able at acc ting zinc oxide, wreury or rechargeable nickel-cadmium
size "D" cells.
a~Size
The size of the DR-i shall be 3 x 2 x 7/8 inches or less Any improvements
in packaging or circuitry shall not ca=e an increase in size o
CONFIDENTIAL
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CCi
T IL
Mrra RL rrEMS
1Q
'tat D splay t$dt? 1-1
5 each
2.
CabL s &Wadio Receiver to MR-1
5 each
3.
Tee's . Cable, TT-1 to M-1
5 each
4 ~
Ibarer S ap `'r Cable.. External 3 Volta to DR-.!
5 each
.5 each
5.
Spare Indicating Imps
6.
7i icati Imp Removal Tool (its ess )
5 each
7-
'^ :ii i ary) truction W 1
1.0 each
pba3 11
item
10 ~t3 ta1. I .Bp19y mid-t., M-1
95 each
2. Cable, Fadio Receiver to 1t..3.
95 each
3. Test Cab1 3i2-1 to M-1
each
4.
or Supply (.b ea
ex
.3. 3 Volts to Mwl.
5.
Sy
me I ddicating Lai
each
6.
anti. Lamp Rer wa1 Tool (3t wcec?ary) 95 C"- h
7.
ope
rator's Instruction
lpie
u
ua3.
3,30 each
~v
Th
eory., ftintensuce and
i
ts Llat M i al
50 each
r"rs ?,. ion Drav a Rviwo .bte
10. pv,.^ xov o rwewLnP, CO-PIG-0
:1... R M-s1uc: tIIu Tools
COW DENTIAL
3.cet
22 wets
I. IQ ,
Declassified and Approved For Release 2012/02/08: CIA-RDP78-0333OA004100010002-9