JPRS ID: 9625 WORLDWIDE REPORT TELECOMMUNICATIONS POLICY, RESEARCH AND DEVELOPMENT

• Document Type: CREST
• Collection: JPRS
• Document Number (FOIA) /ESDN (CREST): CIA-RDP82-00850R000300090047-8
• Release Decision: RIF
• Original Classification: U
• Document Page Count: 26
• Document Creation Date: November 1, 2016
• Sequence Number: 47
• Content Type: REPORTS

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JPRS L/9625
24 March 1981
V1/orldwide Re ort
p
TELECOM,MUNICATIONS POIICY,
- RESEARCW At~D DEVEIOPMENT
~ (FOUO 4/81)
FIBIS FOREICN BROADC.+~ST iNFORMATION SERVICE
- FOR OFFICIAL USE ONLY
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NO'~'E
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~ [J ars supplied by JPRS. Processing indicators such as [Text]
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Unfamiliar names rendered phonetically or transliterated are
~ enclosed in parentheses. Words or names preceded by a ques-
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~
i JPRS Lj9625
i
' 24 March 1981
~
i
~
~
= WORLDWIDE REPGRT
I TELECOMMUNICATIONS POLICY, RESEARCH AND DEVELOPMENT
i (FOUO 4/81)
i
,
i CONTENTS
~
SUB-SAHARAN AFRICA
- NIGER
Briefs
- Contract for Telecommunications Network 1
NIGERIA
Briefs
French Telecommunications Agreement 2
USSR
Earth Station of 'Intersputnik' System in Algeria
(S. P. Kurilov, et al.; ELEKTROSVYAZ', 1Vo 11, 1980) 3
New GDR Communications Equipment at the Leipzig Fair
(I. S. Sverdlova, et al; ELEKTROSVYAZ', No 11, 1980) 14
WEST EUROPE
INTERNATIONAL AFFAIRS
Sweden's Ericsson, ITT Compete for Danish Orders
(VECKANS AFFARER, 29 Jan 81) 23
_ a - [III - WW - 140 FOUOJ
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NIGER
~
BRIEFS
CONTRACT FOR TELECOMMUNICATIONS NETWORK--Niger has concluded a contract of 276 ~
million [CFA francs] with Thoxnson-CSF for setting up a far-rea~hing integrated
- telecommunications and television by satellite network. This will be the most
extensive network Wn Africa, after that of Zaire. [Text] [Paris VALEURS ACTUELLES
in French 2 Mar 81 p 15]
CSO: 5500
1
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NIGERIA
BRIEFS
_ FRENCH TELECOMMUNICATIONS AGREEMENT--The Signaling Systems Company, an
- affiliate of CGCT [General Telephone Construction Company] announced in a
communique published 26 January 1981, that a 200 million franc contract had
bi:~n signed with the PTT [Posts, Telephones and Telegraph] administrati.on of
Nigeria to study and install three telecommunications cable lines to Ibadan,
Ado Ekiti and Akure. The contract covers laying all systems and Iinking the
aboveground and underground cables as well as connecting them with the
customers. These lines will become operatianal in 1982. This contract,
obtained because of the support and experience of the ITT group, confirms and
strengthens the position of the Signaling Systems Company in the field of
- telecommunications cable lines in overseas markets, particularly in Nigeria.
In 1977, the CGCT affiliate signed a contract with that coutltry to install
five similar lines at a cost of more than 120 miliion francs. The Signaling
Systems Company stressed that, with a staff of 1,650, it had a TCC jtoutes
= taxes comprises] turnover of nearly 330 million francs in 1980, of which
35 percent came from exports. [Text~ [Paris MARCHES TROPICAUX ET
MEDITERFcANEENS in French 30 Jun 81 p 254] 9479
CSO: 5500
. 2
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USSR
UDC 621.396.946
- EARTH STATION OF 'INTERSPUTNIK' SYSTEM IN ALGERIA
Moscaw ELEKTROSVYAZ' in Ruseian No 11, 1980 pp 1-5 manuscript received 14 May 80
[Article by S.P. Kurilov, V.A. Borovkov and Yu.F. Konovalov]
[Text] Introduction
At the end of. 1979 the earth network of the "Intersputnik" system was enlarged by -
a new earth station--in the Algerian People's Democratic Republic (APDR). The
station was outf itted with Soviet- and Japanese-produced equipment and was put into
service by Soviet and Japanese specialists. It was built in the area of the space -
complex (fig 1) situated in the foothills of the Atlas Mountains near the city of
- Laklchdariya approximately 80 km southeast of the capital city of Alg~ers.
With its construction three satellite ccmmunications stations were included in the =
structure of the space canplex. Tfao of them, equipped ~,rith parabolic antennas with
a diamet~r of 32 m and a figure of inerit af G/T = 40.7 dB/K (a class A station
according to the classification used in the Intelsat system), operate in the Intel-
sat system, carrying out communicatio~ns with foreign countriea in the regions of the _
Atlantic and Indian oceans; the third station, with a parabolic antenna 11 m in
: diameter and a f igure of inerit of G/T = 31.7 dB/K (a class B station), is the
central station or'. Algeria's national satellite co~nunication3 netw~ork. -
A structural diagram of the "Intersputnik" station in Algeria is given in fig 2, -
_ where 1 is the antenna-waveguide circutt, 2 is a low-moise amplifier (MShU),
3 is a 1:5 divider, 4 is a frequency converter, 5 is a synthesizerr 6 is a TV
demodulator, 7 is a divider, 8 is a processing unit, 9 is a filter, 10 is a
sound track unit, 11 is the pilot signal receiver, 12 represents frequency
"down" converters, 13 represents "Gradient-N" equipment, 14 is a divider, 15
represents a frequency "up" converter and 16 the trans~.i.tter.
- The Soviet equipment is represented at the station by the channel-forming equipment,
_ Lhe two-channel sound track equipment (broadcasting rack) [1], and the "Gradient-N"
- channel-forming equipment [2] included in the individual equipment rack (SIO) and
the common-trunk equipment rack (S00), as well as by the two frequency "down"
converters (V-2 ~racks) [3].
The V-2 racks make possible (for normal operation o~ the ~'Gradient--N~' equipment)
automatic control of the frequency and level of signals received from ISZ's -
3
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[artificial e$rth safie~lftes]. The~e controls are prov~ded directl.y an the
V-2 racks and are ~ccotaplished by control s3gnals froa~ the S00 rack.
S ~ w ..e r.f,,'
2 ~ +
- rt;,:
c'
- ~3,w
- 'r
_ ~'`S,~
~ 3 sf
_ r ~'y
iS~.
.~.G�.:...
Ip
'
Figure 1.
- Almost all the radio engineering equipment of the station (with the exception of
the low-noise amplifiers) is located in the equipment room of a single-story
building measuring approximately 6 X 12 m.
- A diagram of the location of equipment in the equipment room is shown in fig 3,
where 1 and 2 are the telephone trunk transmitters (sets A and B), 3 is the
_ receiving and transmitting equipment rack, 4 is a multi-purpose rack, 5 is the
_ intermediate main distribution frame rack, 6 is the sound track rack (RV [radio
broadcasting] rack), 7 and ~ are the frequency "down" converter racks (the V-2
racks of sets A and B), 9 and 10 represent the "Gradient-N" channel-fcrming
, equipment (the S00-9 and SIO-10 racks) and 11 is the power distribution rack.
- On the receiving and transmitting equipment rack, 3, are located the following:
= the 1:5 divider, the ~requency "up" converters for the telephone trunk, the ~M
- television receiver and the power supplies for this equipment.
4
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~ r-------------~
i--- 1--- i i s i 3~ .
~ ~ ~ 4 6 7 D BudeocuzHan
1 ~ -o I 18(pa.fnaxJ
I z I~ ~ 4~
~
i/IudiepKVn~HQp i I ,3 K onnap.~mype 9 ~.7ayMODoeo
Ka6uNC conpoao.wdeNUa
I Hoe~a~N~A ~2
1, ~ ~ 1 T 9~ cutNai 5)
~ 2) -t~~ -r~ae�
I '1
I ,a I
I ~ 1
i 16 /S _ l T~ eueNan
_ (+4,OJ6M
74 J
i f6 !S ~
~ AnnapamNeiu ,f0~ (j
L---------
- Figure 2.
Key:
1. Cabin under reflector 4. Sound track signal
2. To aiming equipment 5. -13 dBm TF [telephone] signal
- 3. 1 V(range) video signal 6. Equipment room
�
1 2 J 4 S
1)
AnnQpQmNe~u 3an
_ 7 , �
- 0009,0 � ,
_ Figure 3.
Key:
1. Equipment room
5
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- Cki multi-purpose rack 4 are located the emergency si.gnalling systeut, the pilot
signal receiver, the equip~ent ~or monttoring the position of the antenna, and
the equipment for monitorfng and switching the 1ow-noise ampli~iers and trans-
mitters.
The new Gtation differs substantially from previous stations oJ'. the "Zntersputnik~'
system:
l. The station was designed and was implemented for conditions of operation only
via geostationary ISZ's. This decision was made on the basis of official informa--
tion alread,y available at the design ~tage from the board of the "Intersputnik"
Council regarding the changeover of the entire system as of the end of 1979 to
~ operation via geostationary ISZ's.
~ 2. At the station there are only two modes for aiming the antenna at ISZ~s
manual and automatic; there is no Esrogram mode for aiming the antenna.
Autotracking of the station's antenna is accomplished through a pilot signal of the
~ telephone trunk employing the method of extremum adaptive control; in previous
stations of the "Intersputnik" system autotracking of the antenna is accomplished,
of course, through signals of the television (or telephone) trunk using the conical
scanning method.
3. The station's equipment makes it possible to exchange telephone messages and to
receive television signals and, unlike standard stations of the "Tntersputnik"
system, does not make it possible to transmit television signals. Tnis decision
was made by the APDR Communications Administration at the stage of designing the
station, but at the experimental operation stage the station was additionally
equipped with equiFment for transmitting television signals.
4. The station is equipped with an emergency signalling system from all the most
_ important functional units of the receiving and transmitting equipment.
Below is given a brief description of the station's equipment which is non-standard
for stations of the "Intersputnik" network.
Antenna System
A general view of the antenna system is shown in fig 4.
Key technical parameters: type of antenna and its dimensions--parabolic reflector
_ 11 m in diameter; the maximum gain in the transmittir~g and receiving frequency
band is indicated in figs 5 and 6, respectively*; the range of variation of the
antenna's position in terms of angle of elevation is ~J to 90 degrees and in terms
of azimuth (re~ative to the cer.*_er position) + 20 degrees. The antenna can be
moved over the range o~ + 180 degrees in terms of azimuth under nonoperational
conditions.
*The data presented in figs 5 and 6 are guaranteed by the supplier; the actual
values have proven to be 1.0 to 1.5 dB higher.
, 6
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t. 1~, ~s
~ ~
i
- ~
' . _ ~
Figure 4.
' ~Kas .
- 1~ .
ss
s~ s,n 4Y 4.? f, ~~y 2)
Figure 5.
- Key:
1. K, dB 2. f, GHz
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fj M,d6
1,31
2~
- s~
,~7 ,~B a9 4,0 f~/Yy
~'igure 6.
~y:
1. K, dB 2. f, GHz
Low-Noise Amplifier (MShU)
The low-noise amplifier is designed to reduce the effective noise temperature of
the receiver for the purpose of improving its sensitivity. At the station there
are two sets of uncooled parametric amplifiers (a main and standby). Each set
consists of a single parametric amplifier and field-effect t:ransistor amplifiers
following it, which are used to produce the required gain. The parametric ampli-
- fier stage is pumped by ~eans of a fundamental oscillator e;mploqing a Gunn diode
- (without using a multiplier). The parametric amplifier an.3 fi~ld-effect transistor
amplifiers are distinguished by a stabilized temperature, which makes possible a
- low noise temperature of the equipment and high stability of its gain.
_ Key Specifications of MSh~T
- Frequency range, GHz 3.7 to 4.2
Noise temperature, K 45
Gain, dB 60
Stability of gain, dB/24 h + 0.2
The MShU assembly weighs 9 kg and its overall dimensions are 250 X 200 X 1~5 mm.
A general view of the MShU is shown in fig 7.
Switching from one MShU assembly to another can be accomp~ished i,n the pxocess o~
the station's operation manually and automatically (when a work~ng assembly goes
out of order) by means of remote switching equipment located on one of the standard
panels (fig 8) of the mtilti-purpose rack. On the same rack there are two panels
_ (one for each aubassembly) wtth equipment for remote monitoring of the parameters
of the MShU (fig 9). The remote monitoring equip~~ent includes a power regulation
unit, monitoring equipment and emergency signalling equipment.
FM Television Receiver
The FM television receiver is designed to receive frequency-modulated microwave TV
signals with a deviation o~ -1- 15 MHz fn the 3700 to 4200 MHz frequency band, to
convert FM microwave TV signals into intermediate-frequency (70 SrIHz) FM TV signals,
8
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to demodulate intermediate-~requency ~ Ty aignals and to procesS ~hem ~qfi the
purpose of producing the original televtston image.
~~'~~'~~d' ~I . ~ ~ -
i.
�*'^t~ ~
_ ~ ' ~ Ih
-
;a~:~
~ -
_ I~~
~ . f X
~ q 2
%4t >%y~'a"~p L 3
~ 4 ~ ~
'x!~? ~ 1 ~ W ~ S� "8t}'~ _
A Ft
{ t -,t -~3 ~ 1. ,
_ .~ee.,z..3:...+.'.x~�-~~,...u,.'7...,.,.~, o.._s~....~~;.. .r
Figure 7.
� . ~ ,Y,,,~~ -
" I ~f
:i
II
:
-
~ _
. Figure 8.
t~~:..
~
Figure 9.
9
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It is designed as a sepaxate panel ~,nc:luded on the zece~,ying and txans~t~,tz~,np,
eqt~ipment rack and includes (#ig 10) a~requency "down" convexter with a~re~
quency synthesizer, an intermediate-Prequency filter, a~zequene}* dewodulator,
a TV signal processing unit and a power. supply. It weighs approxfmately 25 kg and
~ its overall dfinension:~ are 171 X 483 X!~90 mm.
_ ' i r' ; 19'%~~
i ~L : V"+ ~ ~ ~
~ ~J~rrl~~~! ~`,~E ~V'.
1
~ M".i
~i
;
~
- I -
' ''y~oy~
.
( z�, ~
. ~ , r_
~ ~ I
' .w.~.wY+,.,'.~,:~ . . ~ , 'i m~f.....:... . .
Figure 10.
Let us give its specif ications. Input signal level i:~ dBm, from -70 to -37; output -
signal level in volts, -1 (range); distortion of the "ciifferential gain" type, not
greater than + 2 percent; distortion of the "differential phase" type, not greater
- than + 1 degree. _
Frequency "Up" Converters
- These converters (two units, a main and stazdby) are designed f or converting FM -
telephone signals f rom r_he intermediate frequency ta microwave frequencies.
Key Specifications
Center output frequency, MHz 6100
Width of frequency band fo: -1.0 dB
level, not less than, in MHz 36
Stability of output frequency per hour,
- not worse than + 2 X 10-~
Level of spurious radiation relative
to the level of the carrier o� a
single telephone channel in any
band with a width oi 4 kHz within
the r