rfi : project for creation of specialized test facilities - Indian Army

Tele : 07324- 256130 Army Centre for Electromagnetics
Mhow (MP)
PIN - 900444
c/o 56 APO
2702/Proj COSMOS Phase-I/ 23 Jun 2010
To
_______________________
_______________________
RFI : PROJECT FOR CREATION OF SPECIALIZED TEST FACILITIES
FOR MANAGEMENT OF SPECTRUM (COSMOS) PHASE I
1. Govt of India, Ministry of Defence is interested in creating infrastructure for EMI/EMC
testing of large size equipment to be inducted in the Army as per MIL STD 461E/F on a
turnkey basis, at Army Centre for Electromagnetics (ACE), Mhow.
2. The project will involve the following:-
(a) Large Anechoic Chamber (Size 36m x 25m x 14m).
(b) Shielded Amplifier Room (Size 6m x 4m x 3m).
(c) Shielded Control Room (Size 10m x 6m x 3m).
(d) Civil Works (Construction of the building to house all the above with small
office, Toilets, genr etc.).
(e) Open Area Test site (size 200m x 100m) with Control room.
(f) Test and measuring systems for conduct of tests as per MIL STD 461E/F
& Civil Stds.
(g) Other accessories and infrastructure viz control AC, power supply,
earthing, lighting etc.
3. The qualitative requirements and technical specifications for the above are enclosed
alongwith.
4. You are requested to provide compliance to the technical parameters and budgetary
estimates alongwith approximate time plan for completion of the project.
Encls : (As above)
Sd/xxxxxx
(N Pawar)
Lt Col
SO (Tech)
for Cdr

Introduction
PART I - GENERAL INFORMATION
1. As per DPP – 08, all Communication Electronic (CE) and Non CE equipment that are
proposed for induction into the Indian Army are to be evaluated for compliance to
Electromagnetic Compatibility (EMC) as per laid down Military Standards (MIL-STD) or
Commercial Standards like FCC, CISPR, EN, etc.
2. The tests are conducted as per MIL-STDs inside an anechoic chamber which provides
adequate attenuation from the atmospheric ambient electromagnetic (EM) level. This chamber
is required to house the EMC test system which is required to capture and analyse the
emissions from the Equipment under Test (EUT).
3. It is proposed to establish test and evaluation facilities to be set up at Mhow as part of
Creation of Specialised Test Facilities for Management of Spectrum (Project COSMOS). The
project has been formulated for a 3 phased implementation.
4. This RFI lays down the DPR for such test and evaluation setup to be procured/
developed/ constructed during Phase – I of the Project COSMOS.
Proposed Employment
5. The large anechoic chamber, OATS and associated test and measurement equipment
will be employed for conduct of EMI/ EMC compliance testing of CE and Non-CE equipment
that are proposed for induction into the Indian Army for usage at ACE, Mhow. The detailed
purpose is as given below:-
(a) The large anechoic chamber, OATS and the associated test and measurement
equipment will be used to perform platform level EMC compliance testing on weapon
systems, avionics and sub-systems, CE and Non CE equipments, military vehicles and
systems, Commercial off the Shelf (COTS) equipment, etc of large dimensions (L x W x
H= 10 m x 10 m x 08 m) and weighing upto 80 tons
(b) Proposed chamber and OATS should be fully compliant to perform EMC
measurements according to the following EMC standards adopted by Indian Defence
Forces:-
(i) JSG – 0261 (1999), MIL-STD-461E and F. Radiated Emission (RE)/
Radiated Susceptibility (RS) measurements, at 1m measurement distance from
30 Hz to 40 GHz or any other Military Standards adopted by the Indian Army at
the time of execution of the project.
(ii) Commercial Standards like FCC, CISPR, EN, IEC, IEEE, ANSI, etc.
(c) Important note: It is also planned to use the chamber for antenna and radio
frequency measurements in higher frequency ranges. Therefore it is required that the
chamber is not lined with ferrite and hybrids, due to their limited reflectivity, but with
pyramidal foam absorbers only, offering suitable performances at high frequencies.
6. Compliance of SI Units. The proposed system along with its components, manuals
and software should be based on the International System of Units (SI Units).
7. Date of Availability. The complete system should be available for user trials within
eighteen months of allotment of project.

General
PART II – PHYSICAL CHARACTERISTICS
8. The large anechoic chamber, OATS and associated test and measurement equipment
will be used for test and measurement purpose only is required to function in a controlled
environment without any reduction in its performance level.
9. Classification.
(a) The large anechoic chamber will be classified as Test Chamber (Large).
(b) The Open Area Test Site will be classified as OATS.
(c) The test and measurement equipment will be classified as EMC Test Equipment.
10. Cabling. All cabling will be concealed either underground or in the walls running
through good quality conduit pipes. The cabling will be so designed that the connectors are
easily accessible as well as provide favourable ergonomic environment.
PART – III: OPERATIONAL PARAMETERS
11. The detailed specifications of the large anechoic chamber, OATS and associated test
and measurement equipment to be procured are given in succeeding paragraphs as mentioned
below:-
(a) Part – III (a). Large Anechoic Chamber.
(b) Part – III (b). Open Area Test Site (OATS).
(c) Part – III (c). Test and Measurement Equipment.
Part – III (a): LARGE ANECHOIC CHAMBER
12. Large Anechoic Chamber Details. The chamber shall be divided into the following
segments:-
(a) Anechoic Chamber.
(b) Control Room.
(c) Shielded Amplifier Room.
(d) Power Control and Distribution Room.
(e) Associated civil works including construction of the parent building.
13. Dimension of Parent Building for Housing Large Anechoic Chamber. The anechoic
chamber, control room, amplifier room and office areas will be housed inside a parent building
of dimension L x W x H = 56 m x 30 m x 16 m. The power control and distribution room will be
housed inside a building of dimension L x W x H = 6 m x 6 m x 5 m adjoining the parent
building. The details of the construction and other aspects are given in succeeding paragraphs.
A diagrammatic representation of the parent building is given at Appendix ‘A’.

(a) Requirement for Building Housing Large Size Anechoic Chamber (AC)
Complete structure including the walls and ceiling to be RCC. The size of this
portion of the building will be 40m x 30m x 16m. (Inner dimensions). In order to
withstand the load of vehicle under test, floor in AC should be realized by copper foil
shielding. Proposed steps and scope of work are:-
(i) Ground Plane of minimum 10mm sheet steel welded RF contact to the
shielding at the peripheral. Such realized floor should withstand tracked and
wheeled vehicles up to 80 tons.
(ii) Building to have a main door (pneumatic) of size not less than 12m (W) x
10m (H).
(iii) Building to have two more doors of size not less than 1538mm (W) x
2118mm (H).
(b) Requirement for Building Housing Shielded Control Room. The size of this
portion of the building will be 14m x 10m x 05m. The details of the building are given
below:-
(i) Building to have a main door of size not less than 1013mm (W) x
2118mm (H).
(ii) Building to have other door of size not less than 1538mm (W) x 2118mm
(H) (Common door between AC and CR).
(c) Requirement for Building Housing Shielded Amplifier Room. The size of
this portion of the building will be 14m x 08m x 05m. The details of the building are given
below:-
(i) Building to have a main door of size not less than 1238mm (W) x
2118mm (H).
(ii) Building to have other door of size not less than 1538mm (W) x 2118mm
(H) (Common door between AC and AR).
(d) Miscellaneous Requirements.
(i) There is a requirement of a room of dimension 6m x 6m x 5m for housing
two x 11.25 KVA generators.
(ii) There is a requirement of a room of dimension 10m x 6m x 5m for
housing two toilets (01 x Gents and 01 x Ladies Toilet).
(iii) There is a requirement of a room of dimension 12m x 8m x 5m for
housing the office complex.
(e) Protection against Lightning. Suitable lightning protection infrastructure to
cater for umbrella coverage of 100meter diameter area at 25 meter centre height will be
provided for.
(f) Requirement of Internal Cabling for Internet, LAN and Cable TV. There is a
requirement of providing Fiber optic type of cabling for extending internet services and
LAN to the control room of the specialised building. In addition provision of providing
cable TV access for viewing the system inside the anechoic chamber from the control
room must also be catered for with required Fiber optic cabling.

14. Shielded Rooms Dimensions
(a) The Anechoic Chamber (AC) should have following minimum shield to shield
dimensions: L x W x H = 36 m x 25 m x 14 m.
(b) Control Room (CR) should have following minimum shield to shield dimensions:
L x W x H = 10 m x 06 m x 03 m.
(c) Shielded Amplifier Room (AR) should have following minimum shield to shield
dimensions: L x W x H = 06 m x 04 m x 03 m.
Operational Characteristics
15. The large anechoic chamber control room and shielded amplifier room should have the
following minimum capabilities:-
(a) The chamber should be modular, self-standing (self-supported), and independent
from host building.
(b) The chamber wall and ceiling construction should consist of pre-fabricated
shielding modules of technical characteristics as given in subsequent paragraphs.
(c) The structure design should take into consideration the seismic conditions of the
site of the installation.
(d) The structure must be guaranteed against corrosion for a minimum of 20 years.
(e) The shielding effectiveness must be in consonance with requirements laid down
in MIL-STD 285 and IEEE 299.
(f) The shielded enclosure must provide good earthing with resistance not
exceeding 0.5 Ω.
Technical Characteristics
16. The technical characteristics and design details of the construction of each room/
chamber are given in succeeding paragraphs.
17. Large Size Anechoic Chamber
(a) Walls and Ceiling Construction.
(i) The Anechoic Chamber should be modular, self-standing (selfsupported),
and independent from host building.
(ii) The chamber wall and ceiling construction should consist of prefabricated
shielding modules compliant with DIN1623 and EN10142 standards.
(iii) The panels should be linked together seamlessly without gaps (without
gaskets, inserts or washers).
(b) Absorbers. RF Pyramidal absorbers will be affixed on all four walls and the
ceiling. In addition, removable RF absorbers will be laid on ground plane as required.
The technical specifications of the RF absorbers will be as given below:-
(i) All pyramidal absorbers assembly should be non combustible and must
comply to fire class DIN 4102 A2
(ii) Absorbers should be capable of handling upto 200 V/m continuous and
600 V/m pulse power (20% duty cycle).
(iii) Power handling capability of the absorbers should be greater than 1.2
Watt/ cm 2 .
(iv) The absorption at normal incidence for entire range of the RF absorbers
will be as per Table – I given below.

TABLE – I Absorption at normal incidence
Frequency Minimum absorption
80 MHz - 250 MHz 6 dB
above 250 MHz 10 dB
(v) The shielding effectiveness must be in consonance with requirements laid
down in MIL-STD 285 and IEEE 299 or as per latest active IEEE standards.
(c) Doors. The proposed chambers should be fitted with RF shielded doors, in order
to allow entrance of EUT and personnel. The general characteristics of the doors are
given below:-
(i) Very strong mechanical construction to guarantee long term performance.
(ii) RF sealing should be made to prevent leakage of emissions from within
the chamber enclosure.
(iii) Following number of doors are required:-
(aa) One piece automatic sliding door with clear dimensions of
minimum 12 m (W) x 10 m (H) fully automatic operation with pneumatic
latching and with manual override.
(ab) One piece automatic platform for sliding door, capable of taking a
tracked vehicle’s load of approximately 100 tons when latched.
(ac) Two pieces of hinged personnel access doors with clear
dimensions of not less than 1538mm (W) x 2118mm (H), automatic
operation with pneumatic latching and with manual override will be
provided. One door for direct access to the control room and the other for
direct access to the amplifier room from the anechoic chamber.
(ad) The two personnel doors will be provided with separate manual
removable ramp for material handling with load bearing capacity of 500
Kg.
(iv) All doors must have interlock systems fitted for automatic operation of
safety locks.
(d) Air conditioning. The entire building housing the anechoic chamber, control
room, amplifier room and offices must be centrally air conditioned.
(e) Exhaust Gas Extraction System. The exhaust gas extraction system must be
capable of gas extraction at the rate of 25000m 3 per hour with matching high
temperature resistant hoses and tubes capable of withstanding temperatures up to
1800 0 C.

(f) Ventilation. The shielded rooms should be equipped with honeycomb air
vents, to ensure right air flow and ventilation inside the chamber.
(i) All honeycombs must have cut off frequency of 40 GHz.
(ii) All honeycombs must be delivered with a connection flange in order to
facilitate the fixation of air ducts for exhaust system.
(iii) 40 pieces of honeycomb inserts of dimensions (400mm x 400mm) with
cut-off frequency of 40 GHz are foreseen as a minimum requirement.
(g) Electrical Installation. The electrical distribution should be made from the
filters to the connection panel using steel electrical ducts with covers fixed and grounded
under the raised floor. As the chamber would be lined with absorbers on the inner walls,
and in order to facilitate the access to the electrical distribution box, all distribution boxes
must be made up of shielded material with an opening available outside the chamber.
(h) Lighting. Lighting should be homogeneous with 300 Lux on the floor. For this
adequate number of light points with electrical lifting (up/ down) system should be made
available.
(j) Automation of Antenna Mast. A fully automatic antenna mast system
capable of scanning from 0.9m to 6m height needs to be provided.
(k) Automation of Turntable. There is a requirement of a fully automatic
turntable capable of withstanding a load of 60 Tons with rotation of + 190 0 and – 190 0 by
an AC Drive which can be switched ON/ OFF during testing.
(l) CCTV Systems. Quantity three colour CCTV systems capable of functioning in
a RF field of 200 V/m must be provided.
(m) Intercom System. 1 x audio system capable of functioning in a RF field of 200
V/m must be provided.
(n) Fire Detection System. A centralised firedetection unit common to the AC, CR,
AR and offices must be installed.
(o) Tests to be conducted inside the AC. The following compliance level tests are
to be performed inside the AC:-
(i) MIL-STD 461 F edition 10 Dec 2007.
(ii) CISPR 11 and CISPR 22.
(iii) EN 55011 and EN 55022.
(iv) IEC 61000-4-3
(v) Automotive Directive 95/54/EG
(vi) ISO 7637 and 11452-2
(vii) CISPR 25
18. Control Room(CR) (Shielded Room).
(a) Dimensions. The internal dimensions of the CR would be 10m (L) x 6m
(W) x 3m (H).
(b) Entrance Door The entrance door would be a single wing edge door
pneumatic latching with a clear opening dimension of not less than 1013mm (W) x
2118mm (H). The threshold would be situated at 150mm height with an indication of
“Test in progress” mark.

(c) Honeycombs for ventilation. Quantity six units of 400mm x 400mm (40
GHz cut-off) with flange for easy connection of HVAC conduits must be provided.
(d) Performance. The CR must provide shielding effectiveness in consonance with
requirements laid down in MIL-STD 285 and IEEE 299 or as per latest active IEEE
standards.
19. Amplifier Room (Shielded Room).
(a) Dimensions. The internal dimensions of the AR would 6m (L) x 4m (W)
x 3m (H).
(b) Entrance Door The entrance door would be a single wing edge door
pneumatic latching with a clear opening dimension of not less than 1238mm (W) x
2118mm (H). The threshold would be situated at 150mm height with an indication of
“Test in progress” mark.
(c) Honeycombs for ventilation. Quantity six units of 400mm x 400mm (40
GHz cut-off) with flange for easy connection of HVAC conduits must be provided.
(d) Performance. The AR must provide shielding effectiveness in consonance with
requirements laid down in MIL-STD 285 and IEEE 299 or as per latest active IEEE
standards.
Part – III (b): OPEN AREA TEST SITE
20. Open Area Test Site Details. The Open Area Test Site (OATS) is required for the
conduct of tests in actual EM environment. An open area of 200m x 100m with a ground plane
of dimensions as given below will be required to establish the facility. The ground plane must
have an automatic turntable with load bearing capacity of 60 Tons. The facility should have an
underground air conditioned equipment room for housing the control system for the turntable as
well as high frequency equipments like amplifiers and switching units, etc,. This room will be
connected to the control room of the large anechoic chamber by means of an air-conditioned
underground tunnel. The control room of the large size anechoic chamber will also act as the
control room for the OATS. The detailed design specifications of the required OATS are given in
succeeding paragraphs. A diagrammatic representation of the OATS is given at Appendix ‘B’.
21. Area of OATS. 200m (L) x 100m (W).
22. Ground Plane. The diameter of the ground plane will be 17m.
(a) Material of Ground plane. The material used for construction will be light
gauge galvanized steel. It will be ensured that the sheet of steel used for the ground
plane is of maximum width preferably 4 ft so as to reduce the number of seams. The
ground plane will be then buried under a layer of removable cement slabs for its
protection. The removable slabs will ensure that regular inspection of the ground plane is
possible.
(b) Ground Plane/ Earth Interface. The ground plane will be interfaced to a
good earth of loop resistance not exceeding 0.5Ω.
23. Turntable. A turntable of diameter 10m will be provided at the centre of the ground
plane. The turntable will be flushed with the ground plane with contacts being provided by
means of finger stock. The load bearing capacity of the turntable will be 60 Tons. The turntable
will provide rotation of ± 190 0 . The complete control mechanism and cabling in respect of the
turntable would be located in a pit dug below the turn table. An underground air conditioned
tunnel would be provided for extending these interfaces to the control room from where the
movement of the turntable would be controlled.

24. Equipment Room. Some of the high frequency equipments like RF Power Amplifiers,
switching units, and their drive mechanisms need to be housed in the underground air
conditioned pit below the turntable. These equipments need to be interfaced to the control
system in the main control room.
25. Antenna Mast. A fully automatic antenna mast system at a distance of 30 m from
the circumference of the ground plane capable of scanning from 0.9m to 6m height needs to be
provided.
26. CCTV Systems. Quantity two colour CCTV systems capable of functioning in a RF
field of 200 V/m must be provided.
27. Intercom System. 1 x audio system capable of functioning in a RF field of 200 V/m
must be provided.
Part – III(c): TEST AND MEASUREMENT EQUIPMENT
28. Test and Measurement Equipment Details. The equipments mentioned herein
are required for performing EMC compliance testing as per MIL-STD 461E/ F and other
commercial EMC norms/ standards. The details are as given below.
Military Standard 461 E/ F Compliance Testing Equipment
29. System Specifications. Test and measurement equipment for conduct of following
tests as per MIL-STD 461 E/ F are required to be installed in the large anechoic chamber being
constructed at Army Centre for Electromagnetics (ACE), Mhow.
(a) Basic EMI Test System (40 GHz) in accordance to Mil-STD 461 E/F.
(b) Basic EMS Test System (40 GHZ) in accordance to Mil-STD 461 E/F.
(c) CE101, Conducted Emissions, Power Leads, 30 Hz to 10 KHz (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/ F).
(d) CE102, Conducted Emissions, Power Leads, 10 KHz to 10 MHz (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/ F).
(e) CE106, Conducted Emissions, Antenna Terminal, 10 KHz to 40 GHz for EUT
output power between 200 W and 3.5 KW depending on frequency (Sub System Level
Test and Measurement equipment along with all accessories for conduct of the test as
per MIL-STD 461E/F).
(f) CS101, Conducted Susceptibility, Power Leads, 30 Hz to 150 KHz (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/F).
(g) CS103, Conducted Susceptibility, Antenna Port, Intermodulation, 15 KHz to 10
GHz (Sub System Level Test and Measurement equipment along with all accessories for
conduct of the test as per MIL-STD 461E/F).
(h) CS104, Conducted Susceptibility, Antenna Port, Rejection of Undesired Signals,
30 Hz to 20 GHz (Sub System Level Test and Measurement equipment along with all
accessories for conduct of the test as per MIL-STD 461E/F).
(j) CS105, Conducted Susceptibility, Antenna Port, Cross-Modulation, 30 Hz to 20
GHz (Sub System Level Test and Measurement equipment along with all accessories for
conduct of the test as per MIL-STD 461E/ F).
(k) CS106, Conducted Susceptibility, Transients, Power Leads, 30 Hz to 20 GHz
(Sub System Level Test and Measurement equipment along with all accessories for
conduct of the test as per MIL-STD 461E/ F).

(l) CS109, Conducted Susceptibility, Structure Current, 60 Hz to 100 KHz (Sub
System Level Test and Measurement equipment along with all accessories for conduct
of the test as per MIL-STD 461E/ F).
(m) CS114, Conducted Susceptibility, Bulk Cable Injection, 10 KHz to 200 MHz (Sub
System Level Test and Measurement equipment along with all accessories for conduct
of the test as per MIL-STD 461E/ F).
(n) CS115, Conducted Susceptibility, Bulk Cable Injection, Impulse Excitation (Sub
System Level Test and Measurement equipment along with all accessories for conduct
of the test as per MIL-STD 461E/ F).
(o) CS116, Conducted Susceptibility, Damped Sinusoidal Transients, Cables and
Power Leads, 10 KHz to 100 MHz (Sub System Level Test and Measurement equipment
along with all accessories for conduct of the test as per MIL-STD 461E/ F).
(p) RE – 101 Radiated Emissions, Magnetic Field, 30 Hz to 100 KHz (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/ F).
(q) RE – 102 Radiated Emissions, Electric Field, 10 KHz to 40 GHz (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/ F).
(r) RE – 103 Radiated Emissions, Antenna Spurious and Harmonic Outputs, 10 KHz
to 40 GHz (Sub System Level Test and Measurement equipment along with all
accessories for conduct of the test as per MIL-STD 461E/ F).
(s) RS – 101 Radiated Susceptibility, Magnetic Field, 30 Hz to 100 KHz (Sub
System Level Test and Measurement equipment along with all accessories for conduct
of the test as per MIL-STD 461E/ F).
(t) RS – 103 Radiated Susceptibility, Electric Field, 2 MHz to 40 GHz (Sub System/
vehicle level Testing with stripline antenna and high power amplifiers for a field strength
of 200 Volts/m at a distance of 1m Test distance. Stripline antenna height adjustable
from 4 to 8 m along with all accessories for conduct of the test as per MIL-STD 461E/ F).
(u) RS – 105 Radiated Susceptibility, Transient Electro-Magnetic Field (Sub System
Level Test and Measurement equipment along with all accessories for conduct of the
test as per MIL-STD 461E/ F).
COTS Equipment Test Facility
30. System Specifications. Test and measurement equipment for conduct of sub
system level tests as per following commercial EMC standards/ norms are required to be
installed in the large anechoic chamber being constructed at Army Centre for Electromagnetics
(ACE), Mhow.
(a) CISPR – 11
(b) CISPR – 13
(c) CISPR – 15
(d) CISPR – 22
(e) CISPR – 25
(f) IEC – 61000-4-3
(g) IEC – 61000-4-6
(h) EN – 55011
(j) EN – 55013
(k) EN – 55022

(l) FCC Part 15
(m) FCC Part 18
31. Additional Items to be supplied.
(a) EMC Software with multi user license.
(b) System Controllers
(c) Work Stations with latest configuration (Hardware and software) and applicable
software including anti virus solutions.
32. System Design, Engineering, Manufacturing, Project Management will form part of the
offer.
33. On site installation, Training, Site Acceptance tests and System Commissioning is the
responsibility of the selected vendor.
34. Miscellaneous Requirements.
(a) All cabling should be treated with overall shielding.
(b) Repair and maintenance support should be assured for the entire anticipated life
of the system.
(c) Functioning of the system should be easy, simple and user friendly.
(d) Documents and manuals provided should be exhaustive and in simple and easy
to understand English language.
(e) It should be easy to train newly inducted personnel on the functioning and routine
maintenance of the system.
35. Important Note. A large number of test and measurement equipments
including antennas, probes, etc, mentioned under different categories of test are
common to various tests. It will be ensured that the minimum numbers of equipment/
accessories that are required to perform all tests as per applicable MIL-STD 461E/F
procedures are provided.