REPORT OF THE TECHNICAL COMMITTEE Constituted to short list

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Ministry of Information and Broadcasting
REPORT OF THE TECHNICAL COMMITTEE
Constituted to short list equipment essential for
operating Community Radio Stations and lay down
their specifications
28th JANUARY 2014
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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Report of the Technical Committee constituted to short list
equipment essential for operating Community Radio
Stations and lay down their specifications/Benchmarks
1.
BACKGROUND
1.1
Ministry of Information and Broadcasting introduced a new scheme namely “Supporting
Community Radio Movement in India” in the 12th five year Plan for providing financial support to
new and existing Community Radio Stations under the component “Community Radio Support
Scheme” (CRSS). Under the said scheme, the Ministry would grant financial support to
Community Radio Stations for purchasing equipments essential for operating a CR Station to
the extent of 50% of the total estimated expenditure, subject to a maximum ceiling of Rs. 7.50
lakhs. Detailed guidelines delineating procedure for implementing CRSS has been formulated.
It has been envisaged in the guidelines that a Technical Committee would be set up in the
Ministry in order to shortlist and lay down specifications for the equipments for which the grant
is provided to Community Radio Stations under CRSS.
1.2. Hence, in order to shortlist and lay down benchmarks/specifications for equipment
essential for operating a Community Radio Station, a Technical Committee was constituted by
the Govt. vide Order No. 402/101/2012-CRS(Part), dated 31.07.2013 with the following
composition:
(i)
Sh. V.K. Singla, Retd. E-in-C (AIR)
Chairman
(ii)
Sh. Yogender Pal, Advisor (DAS), Ministry of I&B
Member
(iii) Sh. B.M. Baveja, Sr. Director & Group Coordinator, Department of
Electronics & Information Technology, M/o Communications & IT
Member
(iv) M.K. Pattanaik, A.W.A., Wireless Planning & Coordination Wing,
Department of Telecommunication.
(v) Sh. N. Ramkrishanan, Community Radio Forum of India
Member
(vi) Ms. Pinki Chandran, Community Radio Association
Member
(vii) Ms Alka Malhotra, Prog. Comm Officer, UNICEF
Member
(viii) Ms. Iskara Panveska, UNESCO
Member
(ix) Archana Kapoor, Radio Mewat, Nuh, Mewat-122107
Member
(x)
Member
Arti Jaiman, Gurgaon Ki Awaaz, Gurgaon, Haryana
(xi) Deputy Director (CRS), Ministry of I&B -
Member
MemberSecretary
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2.
RECOMMENDATIONS OF THE COMMITTEE:
2.1
The first meeting of the Committee was held on 14.08.2013. Committee decided that
following basic principles would be kept in mind while finlising the list of equipment and their
benchmarks:
a) No Member or his/her organisation should be associated with manufacturing/supplying
of equipment etc. for CRS to avoid conflict of interest and maintain transparency.
b) Only such equipment should be shortlisted which have provision of providing initial
training and after sale support.
c) Shortlisted equipment should be of good quality with reasonable price.
d) The listed equipments should generate a multi vendor response and should not be
specific to particular manufacturer/vendor.
e) Before finalizing the list and benchmarks, committee should visit few operational
stations.
2.2
Technical Committee visited functional Community Radio Stations, Gurgaon Ki Awaz
and Radio Mewat on 26.08.2013. It was observed that one of the major difficulties being faced
by CRS is technical support for setting up as well as maintenance. The biggest challenge for
CRS is knowledge of Transmitters, Cable, Antenna & Towers. The coverage of station depends
on the working of these systems. The CRS staff need continuous support and guidance on these
issues. Report of the Chairman of Committee on the visit is at Annexure-I.
2.3
During visit committee also observed that:
a) Audio quality of stations is poor & mushy. It was felt that the CR stations should use
Audio Processor, which increases the average level of the audio signal.
b) The loss due to RF cable is very high.
c) The actual power being delivered by transmitter should be measured with the help of
power meter and vendor/integrator should properly certify the power output of
transmitter at the time of installation.
d) CR stations should try to have separate earth for Audio to provide better quality.
e) In rural/remote areas Diesel may not be easily available at all time for running DG set.
Therefore, solar power generator may also be used in place of DG set.
f) A facilitation/support centre is must to provide continuous technical support/guidance to
community radio stations.
2.4
After detailed discussions and visit to operational stations, the committee shortlisted
following 18 equipment for providing financial assistance under the said scheme:
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LIST OF EQUIPMET TO BE SUPPORTED UNDER THE PLAN SCHEME
“SUPPORTING COMMUNITY RADIO MOVEMENT IN INDIA”
S.N.
Name of equipment/quantity to be supported
1
50 W FM Transmitter in 1+ 1 configuration with rack
1A
50 W FM Transmitter (Single)
2
Transmission Tower, any one of the following:
A
Self Supported Transmission tower up to 30 meter
B
Guyed wire Transmission tower up to 30 meter
C
Concrete Transmission tower up to 30 meter
3
2 bay, vertically polarized (Omni Directional) VHF Transmitting Antenna
conforming to WPC regulation
4
Low loss RF Cable with N connector on both ends
5
Off Air Monitoring set up/Logger
6
Monitor, 50 W
7
8 Channel on-air Broadcast console 1+1
8
Dynamic cardioids/condenser Microphones up to 6 nos.
9
Portable solid state field recorders up to 8
10
Headphones- up to 8
11
Personal computers –up to 5 (one with on air recording/automation software)
12
2 channel sound card with differential input –up to 5
13
3 KVA, 3 phase or single phase input online UPS with 30 minutes back up
14
Phone in equipment up to 4 lines with provision conference facility/Phone in
system.
15
3 KVA generator set/Solar Power Generator
16
Split air conditioners, 0.5 ton to 1.5 ton -2 Nos
17
Audio Processor
18
Dummy Load
2.5
Committee finalized the benchmarks/specifications for each of the shortlisted item,
which were then placed in public domain on 16.12.2013 to obtain comments/remarks of
stakeholders for transparency. The last date for furnishing comments was 31.12.2013.
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2.6
Following three organizations furnished comments by due date i.e. 31.12.2013:
(i)
(ii)
(iii)
Broadcasting Engineering Consultants India Ltd.
Community Radio Station, Radio Bundelkhand
HDL
2.7
The Committee considered the comments received in its meeting held on 10.01.2014.
The details of the comments received and the view/decision of the committee thereon is at
Annexure-II.
2.8
The final specifications of shortlisted equipment, after incorporating the suggestions
received are at Annexure-III.
Sh. V.K. Singla,
E-in-C (Retd), All India Radio
Sh. Yogender Pal, Advisor (DAS),
Ministry of I & B
Sh. B.M. Baveja, Sr. Director &
Group Coordinator, Department
of Electronics & Information
Technology
M.K. Pattanaik, A.W.A.,
Wireless Planning & Coordination
Wing,
Department
of
Telecommunication
Ms Alka Malhotra, Prog.Comm
Officer, UNICEF
Sh. N. Ramkrishanan,
Radio Forum
Archana Kapoor, Radio Mewat
Community
Ms. Pinki Chandran, Community Radio
Association
Arti Jaiman, Gurgaon Ki Awaaz
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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ANNEXURE-I
The Technical committee for Community Radio Support Scheme (CRSS) visited community
Radios “Gurgaon Ki Awaj” & Mewat F.M. on 26/08/2013 to see the equipments installed at
CRS to finalize the list of equipments for CRSS. This is being discussed on the next meeting
of the Technical Committee to prepare the specification of equipments.
During the visit it was found that one of the major difficulties faced with the CRS is Technical
support in addition to financial constraints faced by the station.
This technical support is not only required during the setting up of this CRS but also afterwards
for its maintenance etc. Normally the difficulties faced in the station chain/Recordings can be
given requisite training for the same. Infect, it was found that some innovations were also
made locally for acoustic treatment of multi-purpose studio e.g. by using egg trays etc.
But, the actual position regarding echo of R/T of the studio and how can these be controlled or
even leakage of sound through doors etc. may require some guidance for CRS. Use of
microphones/balancing etc. may also be informed for better use/recordings.
There seems to be some problems due to earthing of CRS station especially audio earths which
have not been provided separately. This can help in reduction of noise in the programs relayed
by CRS.
The biggest challenge seems to be for the knowledge of F.M. Transmitters, Cable, Antenna &
Tower. It’s found that these may not be understood by the Local staff and is like a black box
for them. But proper working of these plays an important role for coverage area of the
Transmitters. The main issues in this regard can be:-
Output power of F.M. Transmitter may be less.
The transmitter may not be properly matched.
The rating of cable/loss in cable may not be proper.
Gain of the antenna may not be as per standard.
The direction of antenna may not be proper.
The connectivity of antenna may not be proper especially if aluminum antenna is
provided.
The tower may be titled due to loosening of Guy Ropes etc. leading to tilt of
antenna.
Proper protection from lightening may not be provided. Area of coverage of 50
Watt. Transmitters for CRS with ERP of 100 watt on 30 mts tower may be around
7-8 kms. But it seems, no such survey/field strength measurements are taken after
installing CRS. These reading can be taken as a reference in future for any
deterioration of equipments/faults in the R.F. Chain.
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Since there is virtually no knowledge of these aspects with CRS staff, they can be given
guidance or even help as a support for the system. Even the repair of equipments especially
F.M. Transmitter is a big issue with CRS. Support can be given for this during normal running
of the CRS or even while installing. It can help CRS in proper coverage of their programs
which was found lacking in both the centers visited on 26/08/2013.
Sd/(V.K.Singla)
Engineer Chief (Rtd.)
AIR, & Chairman Technical Committee
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ANNEXURE-II
COMMENTS RECEIVED FROM STAKE HOLDERS/VENDORS ON THE LIST OF
EQUIPMENT ESSENTIAL FOR OPERATING COMMUNITY RADIO AND THEIR
SPECIFICATIONS.
1. Broadcasting Engineering Consultants India Ltd. (BECIL):
S.N
1
Comments of BECIL
1. 50 Watt FM Transmitter (Page – 4)
a) Frequency: May be changed to: 88 –
108 MHz.
Decision/views of Technical Committee
a) Committee decided that the broadcasting
band is from 87.5 MHz to 108 MHz.
Therefore it should not be changed. The
transmitter will broadcast only on the
frequency allocated. Changing of
frequency from 88-108 MHz may also
lead to problem in case of imports etc.
Therefore, it was decided not to change it.
b) Electricals: A.C. Input: May be
changed to: 230 V ± 10%, 50 Hz ± 3
Hz.
b) A.C. Input of 230 V ± 10% may be of
very high end and may not get
multivendor response, which will be
against basic principles adopted for laying
the specifications.
c) Environmental: May be added :
Relative Humidity : 90 %, Non –
Condensing,
c) Committee is of the view to keep
specifications as simple as possible and
features which do not make much
difference may be left out. Therefore,
committee decided not to include relative
Humidity.
The following specs may be added /
included.
a) Output Power : 50 Watt, Capable to
deliver 60 Watt continuously
Output impedance: 50 Ohms,
Unbalanced
b) Permissible VSWR : Less than 1.50
a) Output Power/impedance: With regard
to 60 Watts continuous power, it was felt
that it may become brand specific.
However, it was decided to include 50
Watts continuous power for 24 hours and
not more than 60 Watts.
Output impedance of 50 Ohms
Unbalanced was accepted.
b) Committee
also
accepted
and
incorporated VSWR in transmitter
specifications.
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2
2. Mast or Transmission Tower
Page No. 5, 1st Para, Lines 3 & 4
may
be
modified
as:
Masts / Towers may be procured. The
offer must include Supply and
Erection
of
Tower,
including
construction of foundations, mounting
of antenna, R.F. Cable and Cable
Tray.
i) Although
the
specifications
of
Masts/Towers
have
details
about
Foundations, antenna hosting and cable
routing etc., however, committee decided
to incorporate the comments in the
specifications to have more clarity.
ii) Page No. 5: Self Supporting Mast:
1st Line to be modified as: “Latticed
Steel, Self Supporting Tower are ideal
for installations where space ……
ii) Committee was of the view that
mentioning of Latticed Steel is not
necessary as requirements of wind load
and wind velocity etc. for mast/tower
have been specified, irrespective of type
of steel.
a) Page No. 6 : Anchors: Sr. Nos., 2 &
3 may be modified as :
a) The committee accepted proposed
modifications in Anchors and decided to
incorporate them in specifications.
i)
2. Dia of Anchor Bolts: 16mm
3. Length of Anchor Bolts: As per
requirement.
3
4
b) Page No. 8: B “Lattice Steel” may b) & c):
be added to the heading.
Not accepted, as mentioned in comments
c) Page No. 9: “Lattice Steel” may be
2(ii) above.
added to the heading of Fig.
3. VHF Transmitting Antenna (Page
No. 12)
a) Impedance: May be changed to: 50
a) Impedance of 50 Ohms, unbalanced was
Ohms, unbalanced.
accepted and incorporated.
b) Gain: May be changed to 3 db (5 dbd).
The words “(ERP) should not exceed b) Gain of 3db was also accepted and
incorporated. Also, it was decided to
100 W” may be deleted as ERP is
remove the line 100 W ERP from antenna
system calculation for technical
and mention it separately.
parameters and not function of antenna.
4 Specifications of Low Loss Feeder
Cable with N- Connector
The size of the cable may be changed to
½” Foam Di-electric Cable, which is
easily available as well produced in
India also. The proposed 5/8” Air Dielectric Cable is not easily available in
India and is costly and not
commercially viable for a CRS. Moreover, a De-hydrator is required to
remove moisture from the Air
After discussion, committee accepted the
justification and decided to change the cable
size of ½” or 5/8” Foam Di-electric type,
instead of including De-hydrator.
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Dielectric
Cable
and
neither
De-hydrator is included in the list of
CRS Equipment nor its specifications
are given. For Foam Di-electric Cable,
dehydrator is not needed.
2. Radio Bundelkhand:
S.N
1
Comments of Radio Bundelkhand
Decision/views of Technical Committee
Page 5 (A) Please add the following
component:
Chemical Earthing
The concept of Earthing is changing from
made to order earthing to readymade
earthing which is available off the shelf
from an electrical dealer in your electrical
market and is an easy ready-to-install
component.
2
Page 12 Please
component:
add
the
The standard/norms for earthing have been
specified, which can be provided with any
kind of earthing. Therefore, mentioning of a
specific kind of earthing has no relevance.
following
The Dummy Load
This is basically a resistor, but constructed Committee agreed to include a Dummy
in such a way that it presents a load to the Load of 50 Watt, matching transmitter
amplifiers output independent of frequency specifications.
(unlike the aerial). The three characteristics
of a dummy load we're interested in are:
With regard to low pass/band pass filter to
1. It should be suitable for the frequency stop broadcast of harmonics, committee
we're interested in, about 100MHz,
decided
to
incorporate
following
specification
in
transmitter
specifications:
2. It should be rated to take the power
we're trying to produce,
“ Transmitter should comply ITU norms for
3. It should have a resistance of 50R (to Harmonic separation.”
match the output network of the
amplifier).
4. Dummy loads designed for the 2 meter
band will work well in the VHF FM
band. Most test gear for this band
(dummy loads, VSWR meters, power
meters, wave meters, RF voltmeters,
frequency counters etc.) will work on
the frequencies we're interested in.
5. Even if you tune everything correctly
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you're still going to have some
harmonics generated by the last stage.
A sensible operator won't let these
harmonics reach the aerial.
6. To stop harmonics reaching the aerial
we need either a Low Pass Filter or a
Band Pass Filter.
Band pass Filter A Band pass Filter
(BPF) only allows through a narrow band
of frequencies, i.e it has a narrow
bandwidth, a good one would be less than
1MHz. It needs standard 50R input and
output impedance and be able to take the
power you want to use. It also has to be
tuned to the frequency you want let
through.
A well-designed TX will have a filter built
into it. It needs to be in a well screened
case to stop harmonics leaking out.
3
Page
15
(7)
On-Air
Broadcast
The list of equipments, already mentions
Console/Mixer:
Minimum
required
1+1 Broadcast console.
quantity 2 or more should be added.
4
Page 17 (9) Use of Portable Solid State
Field Recorder:
In the view of community radio set-up,
MP3 based field solid state would be better
option instead of wav format recorders. An
average CR generates approximate 300400 mb data per day so they need MP3
recorders to minimize HDD space and
these are available (branded model) in
range of 6000/- to 8000/- Rs. in the local
market
For use MP3 based field recorders, it was
decided that wave format is a mother format,
which may be converted in other formats.
Also, the editing is easier in wave format.
Therefore, committee decided to keep
initially wave format only and reconsider it
in future reviews based on the response of
stations.
One minute of music, sampled at CD
quality will make a file about 10 MB in
size! With the average song being 3 min.
long, .wav files have a voracious appetite
for hard drive space. Files this large are
also difficult to transfer over the internet. If
the rate of sampling is lowered, the file
size can be reduced at the expense of lower
quality sound. MP3 was developed as a
form of compression which will reduce the
size of .wav files, with minimal loss of
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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quality.
5
Page 20 Personal Computers (11):
The quantity of Personal Computers is
Required quantity at least 2 Nos. with already mentioned up to 5. The stations may
external professional quality sound card (if choose any quantity as per their requirement
it is used with analog channel mixer)
and budget.
6
Page 21 UPS & Battery 3.3 Back up time: UPS with more than 30 minutes back up are
30 minutes
- is not sufficient (at full costlier and not available easily. In addition,
provision of DG set has also been kept.
load?)
Therefore, it was not accepted.
A particular brand name cannot be specified.
Page 22 14. PHONE- IN- UNIT: Please
give specific brand name of telephone Stations may choose any brand which
complies with the bench marks laid down.
hybrid system.
7
8
If possible, please add estimated INR
values of illustrated equipments. This is a
very crucial component for CRS. It will be
useful, if you could provide these in three
categories with varying budget pockets
viz. Low cost, medium cost and high cost.
To provide the estimated values is not the
mandate of Technical Committee. Also, the
values would depend on the brand selected
by
the
station.
However,
CRS
PMU/Screening Committee may consider
listing approximate costs.
3. HBL Power Systems Ltd.:
S.N
1
2
3
Comments of HBL
Decision/views of Technical Committee
Outer Diameter of Concrete Tower: As
requirement is from 15Mtr to 30 Mtr,
hence outer diameter of tower will vary.
However for 30 Mtr tower outer diameter
of Bottom is 600mm and tapering to
190mm at the top is sufficient. Hence
request to modify the clause accordingly.
Lightening Arrestor: As per the spun
concrete tower design, internal earthing
arrangement is available, hence no separate
braided copper wire is required for
lightening arrestor from the top of the
tower to nearest earth pit.
Antenna hoisting arrangement: As Spun
concrete tower is circular, hence no 3
faces. We request to modify the clause
accordingly stating that “Antenna shall be
made on circular faces of the tower. This
supporting pole will be fixed in VHF FM
Committee agreed and comments were
incorporated in the specifications.
Committee agreed and comments were
incorporated in the specifications.
Committee agreed and comments were
incorporated in the specifications.
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4
5
Band‐II aperture on one of the circular
face”,
Painting: As tower is of concrete, hence Committee agreed and comments were
primer coats are not required. We request incorporated in the specifications.
to modify the clause accordingly.
Earthing: As per the spun concrete tower Committee agreed and comments were
design, internal earthing arrangement is incorporated in the specifications.
available, hence no separate braided
copper wire is required for lightening
arrestor from the top of the tower to
nearest earth pit.
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ANNEXURE-III
List of CRS equipment to be supported under the Plan Scheme “Supporting
Community Radio Movement in India”
S.N.
Name of equipment
1
1A
50 W FM (CRS) Transmitter in 1+ 1 configuration with rack
50 W FM (CRS) Transmitter (Single)
2
A
B
C
3
Transmission Tower, any one of the following:
Self Supported Transmission tower up to 30 meter
Guyed wire Transmission tower up to 30 meter
Concrete Transmission tower up to 30 meter
2 bay, vertically polarized (Omni Directional) VHF Transmitting Antenna
conforming to WPC regulation
4
5
Low loss RF Cable with N connector on both ends
Off Air Monitoring set up/Logger
6
7
8
9
10
11
12
13
14
15
16
17
Monitor, 50 W
8 Channel on-air Broadcast console 1+1
Dynamic cardioids/condenser Microphones up to 6 nos.
Portable solid state field recorders up to 8
Headphones- up to 8
Personal computers –up to 5 (one with on air recording/automation software)
2 channel sound card with differential input –up to 5
3 KVA, 3 phase or single phase input online UPS with 30 minutes back up
Phone in equipment up to 4 lines with provision conference facility/Phone in
system.
3 KVA generator set/Solar Power Generator
Split air conditioners, 0.5 ton to 1.5 ton -2 Nos
Audio Processor
18
50 Watts Dummy Load, matching transmitter specifications
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BENCHMARKS/SPECIFICATIONS OF EQUIPMENT TO BE SUPPORTED UNDER
THE PLAN SCHEME “SUPPORTING COMMUNITY RADIO MOVEMENT IN
INDIA”
1. 50 Watt FM (CRS) Transmitter
The transmitter must be capable of delivering 50 Watt continuously for 24 hours and not more
than 60 Watts conforming to ITU norms for operation between 87.0 Mhz to 108 mhz along
with technical mannuals for instalation, testing, commissioning, operation & maintainance,
including theory of operation and fault diagnosis. The equipment must have onsight warntee for
one year of operation or 1.5 years of supply, which ever is earlier. In addition vendor/supplier
is to provide training on operationa and maintainance of the transmitter to the operating staff.
All measurement and test certificates from concerned authorities, where ever specified, should
accompny the transmitter.
Deatiled specifications are as below:
Audio input
THD
Output
Impedance
XLR connector, balanced or unbalanced, true differential,
nominal input impedance of 10 kΩ, +4 dBm @ 75kHz Deviation
< 0.01%, 30Hz‐15 kHz
50 Ohms, unbalanced
Frequency
Frequency
stability
Audio response
87.0-108 MHz
Crystal controlled, +/- 200 Hz, complying with ITU specifications.
(Fine
± 0.5 adjustment
dB 20 Hz toavailable.
15 kHz
Signal to Noise
Ratio
1.
2.
Weighted > 70 db
Unweighted > 75 db
AM Synchronous > 60 db
AM
Asynchronous
Harmonic
Separation
> 65 db
Should comply ITU norms for Harmonic Separation
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VSWR
Transmitter should be capable to withstand VSWR up to 1.5
Analog metering PA DC Voltage and current, RF forward power at PA and reflected
power at PA
display
2.
LED Indication
Integrated fault, VSWR fault
Monitoring
Built in on‐board FM demodulator. Standard audio line output on
XLR for monitoring. LED bargraph display to indicate the frequency
deviation of the transmitter.
Electricals
AC input: 230 V ± 5%, 50 Hz, ± 3 Hz
Environmental
Ambient Temperature range: -5°C to + 45°C
Cabinet
Standard 2U height cabinet with 19” rack mounting fixture.
Mast or Transmission Tower
Mast (tower) is used to mount antenna at a desired height. For community radio maximum
height of antenna should not exceed 30 meter from ground level. Any one of the following
types of Masts/Towers may be procured. The offer must include Supply and Erection of Tower,
including construction of foundations, mounting of antenna, R.F. Cable and Cable Tray.
i) Guyed Mast: A guyed mast is a tall thin vertical structure that receives support from
guy lines. It is cheapest, but requires lot of space.
ii) Self-Supporting Mast: Self-supporting Towers are ideal for installations where space
requirements are limited. It is costlier than guyed mast.
iii) Concrete Tower: Reinforced concrete towers are relatively expensive to build but
provide a high degree of mechanical rigidity in strong winds.
A. Specifications of Guyed Mast:
i)
Height:
Maximum 30 Meter & Minimum 15 meter (From Ground)
ii) Wind load:
47 kg/cm2
iii) Wind Velocity:
170 km/hour
iv) Able to bear a load of 25 kg in addition to cable, cable tray & ladder
v)
The design should be approved/vetted by a recognised Engineering College/Institute
Mast Section:
1
2
3
4
No. of Sections
Length of Each Section
Make & finish
Cross Section
Minimum 8 sections
3 to 4 meters
Hot Dip Galvanized
Triangular with 3 vertical on 3 corners of
triangle of side 12 inches.
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Lower Base Plate
1
2
3
4
Length minimum
Breadth minimum
Thickness
Finish
500 mm
500 mm
10 mm
Hot Dip Galvanized
Min. No. of Guy Levels
Min. Guys per Level
Min. dia of the Guy
Construction of Guy
Min. Length of Guys
4 Nos.
3 Nos.
8 mm.
6x19 Hemp Core
To suit the base.
Guys
1
2
3
4
5
Foundation Bolts
1
2
No. of Foundation bolts
Dia. Of foundation bolt
4 Nos.
Min 20 mm
Anchors
1
2
3
No. of Anchors
Dia of Anchors Bolts
Length of Anchors Bolts
3 Nos.
16 mm
As per requirement
Straining Screws
1
2
3
4
No. of straining screws
Dia of Bolt
Length of straining screw
Finish
1 No. per guy
Min 16 mm
18"
Zinc Plated
Dee Sachkles
1
2
3
No. of Dee-Shackles
Dia. Of Dee-Shackles
Finish
3 nos. per guy
10 mm
Zinc Plated
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Thimbles
1
2
3
Size
Quantity
Finish
10 mm
2 nos. per guy
Zinc Plated
Lightening protection: The tower will be provided with a suitably designed system of lightening
protection in accordance with the provision of IS:2309/1969. Braided copper wire will be provided
for Lightening Arrestor from top of the tower to the nearest earth pit.
Foundation: Suitable RCC foundation based on the site condition, local terrain, soil conditions,
nature of sub soil, water table and its seasonal variations etc will be laid. Foundation will be
protested by provision of pitching work on sloping terrain to protect the foundation from erosion.
The cement, sand, and concrete used shall be of best grade in the standard ration 1:2:4. The
foundation shall be watered and cured is thoroughly cured.
Antenna hoisting arrangement: Provision for fixing 100 mm dia N.B. Supporting seamless GI pipe
of 8 meter length for side mounting VHF FM Pole type Antenna shall be made on three faces of the
tower. This supporting pole will be fixed in VHF FM Band-II aperture on one of the three faces, to
be intimated at the time of erection of tower based on the coverage requirements. The fixtures of the
antenna shall not foul with the cable routing from the power divider to the antenna.
RF coaxial cable routing: The cable run between the tower base and transmitter building shall be
through a horizontal cable G.I. pipes or G.I. angle iron structures and the rack will be covered by
Semi Circular G.I. Sheet cover.
Painting: The tower shall be provided two or more coats of paints in addition to two primer coats
after erection. The tower shall be painted to have equal alternate bands of international orange and
white colors with top and bottom painted in orange as per latest Civil Aviation Regulations.
Earthing: The tower shall be provided with a suitably designed complete system of lightening
protection in accordance with the provision of IS:2309/1969 including necessary earthing based on
the specific resistivity of the soil and sub-soil water level. Braided copper wire of 30 square mm dia
to be provided for Lightening Arrestor from top of the tower to the earth pits.
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B. SELF SUPPORTED TRANSMISSION TOWER
i) Height:
Maximum 30 Meter & Minimum 15 meter (From Ground)
ii) Wind load:
47 kg/cm2
iii) Wind Velocity:
170 km/hour
iv) Able to bear a load of 25 kg in addition to cable, cable tray & ladder
v) The design should be approved/vetted by a recognised Engineering College/Institute
Construction details: Steel members and section used in the fabrication are galvanized, conforming
to relevant IS specification i.e. IS: 2629 for tower members IS: 1367 for fasteners and IS:1573 for
washers: Structural steel of the tower members conform to IS: 8500, IS:226, IS:2062 and IS:7215 or
latest IS as applicable. Assembly of all tower members and other structures on tower shall be by
means of hexagonal nuts and bolts along with locking nuts. Minimum thickness of members should
be 4 mm. The bolts are treated with standard threads to take the full depth of the nut. The overall
force co-efficient the solidity ratio, actual obstruction area of tower has been considered. The basic
wind velocity for the site has been taken from the revised BIS Code No. IS:875/1987. The schematic
of the tower is provided on the overleaf.
Lightening protection: The tower will be provided with a suitably designed system of lightening
protection in accordance with the provision of IS:2309/1969. Braided copper wire will be provided
for Lightening Arrestor from top of the tower to the nearest earth pit.
Foundation: Suitable RCC foundation based on the site condition, local terrain, soil conditions,
nature of sub soil, water table and its seasonal variations etc will be laid. Foundation will be
protested by provision of pitching work on sloping terrain to protect the foundation from erosion.
The cement, sand, and concrete used shall be of best grade in the standard ration 1:2:4. The
foundation shall be watered and cured is thoroughly cured.
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Antenna hoisting arrangement: Provision for fixing 100 mm dia N.B. Supporting seamless GI pipe
of 8 meter length for side mounting VHF FM Pole type Antenna shall be made on three faces of the
tower. This supporting pole will be fixed in VHF FM Band-II aperture on one of the three faces, to
be intimated at the time of erection of tower based on the coverage requirements. The fixtures of the
antenna shall not foul with the cable routing from the power divider to the antenna.
RF coaxial cable routing: The cable run between the tower base and transmitter building shall be
through a horizontal cable G.I. pipes or G.I. angle iron structures and the rack will be covered by
Semi Circular G.I. Sheet cover.
Painting: The tower shall be provided two or more coats of paints in addition to two primer coats
after erection. The tower shall be painted to have equal alternate bands of international orange and
white colors with top and bottom painted in orange as per latest Civil Aviation Regulations.
Earthing: The tower shall be provided with a suitably designed complete system of lightening
protection in accordance with the provision of IS:2309/1969 including necessary earthing based on
the specific resistivity of the soil and sub-soil water level. Braided copper wire of 30 square mm dia
to be provided for Lightening Arrestor from top of the tower to the earth pits.
Fig: SELF SUPPORTED TRANSMISSION TOWER
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C. Concrete Tower:
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Page 22 of 47
DETAILS OF THE MONOPOLE
The 30 m high pre-stressed spun concrete monopole, self-supporting with mountings at
different heights. The entire height of the monopole is to be divided into minimum 3
panels/segments. As requirement is from 15Mtr to 30 Mtr, hence outer diameter of tower will
vary. However, for 30 Mtr tower outer diameter of Bottom must be 600 mm with tapering to
190 mm at the top. The cross-section should be annular with thickness varying along height
capable of the following:
i) Height:
Maximum 30 Meter & Minimum 15 meter (From Ground)
ii) Wind load:
47 kg/cm2
iii) Wind Velocity:
170 km/hour
iv) Able to bear a load of 25 kg in addition to cable, cable tray & ladder
v) The design should be approved/vetted by a recognised Engineering College/Institute
ANALYSIS AND DESIGN
The monopole should be analysed for the various load combinations. The monopole should be
modeled as a beam element. The wind load on the pole should be calculated by using the Gust
factor method as per Clause 8 of IS 875 – Part 3.
The wind loads due to antennae and the panels should be calculated and applied in the analysis.
Dynamic analysis should be done and analysis results to be presented.
As per IS 456 – 2000, the following load combinations should be considered in the analysis:
(i) 1.0 Dead load (DL) + 1.0 Wind Load (WL)
(ii) 1.5 Dead Load + 1.5 Wind Load
(iii)0.9 Dead Load + 1.0 Wind Load
The design of the pre-stressed monopole is to be done as per the limit state method. The limit
state for serviceability and collapse is to be checked for the worst load combination of DL +
WL (for service load combination) and 1.5DL + 1.5WL (for ultimate load combination).
LIMIT STATE OF SERVICEABILITY - DEFLECTION
The deformations under service loads at any point on a structure shall not exceed the following:
(i) A rotation of 4 degrees about the vertical axis (twist) or any horizontal axis
(sway) of the structure.
(ii) A horizontal displacement of 3% of the height of the structure.
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LIMIT STATE OF SERVICEABILITY – CRACKING
Cracking should be within permissible limits given in clause 22.7.1, IS 1343-1980, for type 3
members.
LIMIT STATE OF SERVICEABILITY – MAXIMUM COMPRESSION
Maximum permissible compressive stress in flexure due to final pre-stress should be as per
clause 22.8.1.1, IS 1343 – 1980,
LIMIT STATE OF COLLAPSE – FLEXURE
The design of the section for the ultimate moment should be based on Clause 22.1.1 of IS 1343
– 1990.
Lightening protection: The tower will be provided with a suitably designed system of lightening
protection in accordance with the provision of IS:2309/1969.
Foundation: Suitable RCC foundation based on the site condition, local terrain, soil conditions,
nature of sub soil, water table and its seasonal variations etc will be laid. Foundation will be
protested by provision of pitching work on sloping terrain to protect the foundation from erosion.
The cement, sand, and concrete used shall be of best grade in the standard ration 1:2:4. The
foundation shall be watered and cured is thoroughly cured.
Antenna hoisting arrangement: Provision for fixing 100 mm dia N.B. Supporting seamless GI pipe
of 8 meter length for side mounting VHF FM Pole type Antenna shall be made on circular faces of
the tower. This supporting pole will be fixed in VHF FM Band-II aperture on circular faces of the
tower, to be intimated at the time of erection of tower based on the coverage requirements. The
fixtures of the antenna shall not foul with the cable routing from the power divider to the antenna.
RF coaxial cable routing: The cable run between the tower base and transmitter building shall be
through a horizontal cable G.I. pipes or G.I. angle iron structures and the rack will be covered by
Semi Circular G.I. Sheet cover.
Painting: The tower shall be provided two or more coats of paints after erection. The tower shall be
painted to have equal alternate bands of international orange and white colors with top and bottom
painted in orange as per latest Civil Aviation Regulations.
Earthing: The tower shall be provided with a suitably designed complete system of lightening
protection in accordance with the provision of IS:2309/1969 including necessary earthing based on
the specific resistivity of the soil and sub-soil water level.
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3.
VHF TRANSMITTING ANTENNA
An antenna is an electrical device which converts electric power into radio waves. For
community radio antenna must be wideband with copper dipoles and stainless steel/copper
mounting boom. It should have weather and corrosion resistance to suit tropical climate.
Frequency
Power Rating
Impedance
Return loss at frequency
of operation
Beam width V
Beam width H
Pattern
Polarization
Termination
Gain
Clamps
Bays
Max Wind Velocity
Wind Load (with speed at
150 Km/hour
Lightning protection
Mounting Position
*
87.0 MHz to 108 MHz
200 Watt
50 Ohms, Unbalanced
Better than: 23 dB (VSWR 1.15) (factory tuned at
operating frequency) Typical: 26 dB (VSWR 1.1)
Less than 80°
omnidirectional
Offset Circular
Vertical
N – Male
3 dBd*
GI
2
150 Km/hour
10 kg
DC grounded
End
The Effective Radiated Power (ERP) of the system (i.e transmitter power + antenna
gain – cable loss) should not exceed 100 Watts
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4.
Specifications of Low Loss Feeder Cable with N Connector
Foam Di-electric RF Cable of 1/2” or 5/8” size to connect the transmitter with antenna.
Its inner conductor (wire) should be made of copper/Copper clad Aluminum Wire and
outer conductor of corrugated copper. The detailed specifications are as below:
Attenuation of Power: Below 2.3 db /100 meter (0.688 db/100 feet) (over the complete
range 87.5 to 108 MHz. )
Cable Type
:
Foam Dielectric
Size
:
1/2 Inch or 5/8 Inch
STRUCTURE :
Inner Conductor Material
Diameter Inner Conductor
Diameter Dielectric, mm (in)
Outer Conductor Material
Diameter Copper Outer Conductor
Diameter Over Jacket Nominal,
De-electric
½ Inch
Copper
Wire
/
Copper
Clad
Aluminum Wire
4.6 to 4.8 mm
11.3 to 12.1 mm
Corrugated Copper
13.8mm
16 to 16.2 mm
Foam
5/8 Inch
Copper Wire /
Copper Clad
Aluminum Wire
6.3 mm
13.7 mm
Corrugated Copper
19.0 mm
21.4 mm
Foam
MECHANICAL SPECIFICATIONS :
Cable Weight
0.22
to 0.23 Kg
0.70 Kg/meter
/Meter
Minimum Bending Radius, Single 70 to 125 mm
80 mm
Bend
Minimum Bending Radius, Repeated 125 mm
250 mm
Bends
Tensile Strength, N
1100 N
2400 N
ELECTRICAL SPECIFICATIONS :
Impedance
Peak Power Rating
50 ± 1.0 Ohm
30 kW
50 +/- 1.0 Ohm
30
TEMPERATURE RANGE :
Operation Temperature
-25 to + 65°C
-25 to + 65°C
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Recording time:
Analog line inputs:
ES-3 line inputs:
Analog line output:
AES-3 line output:
Skimming:
FM Capture:
Storage:
Processor:
Operating system:
90 Days minimum for 24 hours
Balanced (XLR breakout cable supplied)
+24dBu clipping level (+8 / +4 / 0dBu nominal level)
20k input impedance
48kHz sampling
24-bit converters
80kbps / 128kbps / 256kbps / lossless compression
(selectable per channel)
transformer-coupled (XLR breakout cable supplied)
32kHz – 96kHz 24-bit sampling
80kbps / 128kbps / 256kbps / lossless compression
(selectable per channel)
Balanced (XLR breakout cable supplied)
40 ohm output impedance (minimum load 600 ohms)
+24dBu peak level (+8/+4/0dBu nominal level)
transformer-coupled (XLR breakout cable supplied)
48kHz 24-bit sampling
External AES-11 sync input
16 optically-isolated user-assignable inputs
Daily event list display linked to audio log
Sequential playing and archiving of multiple events
87.5 – 108.5MHz tuning range (50kHz steps)
BNC antenna connection
48kHz sampling
64kbps compression
Maximum 24 stations
Optional RDS Program Information and Radio Text
logging
Up to 3 x 2TB SATA hard discs
RAID-5 (striping) or RAID-1 (mirroring)
DVD R/W drive (+/- formats supported)
64-bit Pentium dual-core or quad-core
2GB RAM
Windows based 64-bit edition or equivalent
5.
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L
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6. STUDIO MONITOR
A 50 watt active monitor, required to monitor the quality of programme, with
following specifications:
General Features:
1. Active Monitors shall be professional, high quality, near field (1 to 1.5 Mtr. distance)
and suitable for continuous use in Broadcast studios.
2. Monitor shall have attractively designed rugged & magnetically sealed
enclosure/cabinet.
3. The Loudspeakers in the Monitors shall be of high fidelity two-way speaker system
consisting of woofer & tweeter.
4. Active Monitor shall be Bi-amplified (i.e. it will have two amplifiers, one for
connection to the woofer section of a loudspeaker while the other for connection to the
combined mid and tweeter section) and shall have perfectly matched active crossover
network.
5. Monitor shall have balanced XLR connector for feeding audio input to monitor.
6. Monitor shall have overall volume control facility for precise overall level matching.
7. Monitor shall have low & high frequency level controls.
8. The monitor shall have protection against open circuit, short circuit, current & thermal
overloads.
9. The monitor shall work on 230 V± 5% AC 50±2 Hz, Single Phase power supply.
Technical Specifications:
1. Frequency response: Within ± 3 dB between 50 Hz & 18 kHz with respect to 1 kHz. A
frequency response curve shall be supplied with each unit.
2. Amplified Power: Total amplified Power of 50 W.
3. LF Trim : ± 2 dB
4. HF Trim : ± 2 dB
5. Input impedance : ≥10 k ohms (balanced)
6. Nominal Input Level : 0 dBu
7. Input Level Range : -10 dBu to +10 dBu
8. Maximum SPL continuous: > 104 dB.
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7. On-Air Broadcast Console/Mixer:
Description
Specification
Frequency Response
THD + N
Noise
Eight Mic./Line Input to any output, 20Hz - 20kHz , <1 dB
Mic. sens. -30dBu, +10dBu at all outputs @1kHz , <0.006%
Measured RMS, 20Hz to 20 kHz Bandwidth
Mic. E.I.N. @ unity gain,150 Ohm source impedance -128 dBu
Mix Output, 8 inputs routed to mix <-86 dBu
Group & Centre Outputs <-86 dBu
Aux Outputs <-86 dBu
Input Channel Mute <-97 dB
Input Fader cut-off <-95 dB
Pan isolation <-77 dB
Adjacent channel crosstalk <-99 dB
Group to Mix <-89 dB
Typical @ 1kHz 90 dB
Mono & Stereo Mic. Inputs + 15 dBu
Mono & Stereo Line Inputs + 30 dBu
Stereo Returns & Insert Returns + 20 dBu
Any output + 20 dBu
Nominal Operating Level
0 dBu
Headphone Power , 2 x 250mW into 200 Ohms
Mic. Inputs, 2 K ohms
Crosstalk (@1kHz, typical)
CMRR
Input & Output Max Levels
Input & Output Impedances
EQ (Mono input)
Metering
Line Inputs and Stereo Returns, 10 K ohms
Input channels Insert Return, 5 K ohms with EQ in, otherwise 3k
Ohms
Mix, Group, Aux, Matrix & Direct outputs,150 Ohms
Insert sends, 75 Ohms
Recommended Headphone Impedance ,50-600 Ohms
High pass filter (Mono input) 100Hz, 18 dB/octave
HF, 13 kHz, +/-15 dB, 2nd order shelving
LF, 80 Hz, +/-15 dB, 2nd order shelving
Input channels, Single LEDs, Signal Present & Peak
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Output
Power
Operating conditions
8.
Outputs , 2 tri-color 12-segment LED bargraphs
1+1 stereo, additional output for head phone and line monitoring
AC mains supply (internal PSU), 90V-240V AC, 50 Hz universal
input
Power consumption, Less than 100W
Temperature range, -10ºC to +30ºC
Relative humidity ,0% to 80%
Dynamic Cardioid Microphone
TECHNICAL SPECIFICATION
Essential features of Microphone
i) The microphone shall be designed for vocal recording with brightened mid-range and
bass roll-off.
ii) The microphone shall have cardioid /super cardioid pattern so as to isolate main sound
source and minimize background noise.
iii) The microphone shall have rugged metal body and shall have shock mount capsule to
reduce handling noise without compromising its acoustic properties.
iv) Microphone shall have hum compensation coil for providing hum rejection.
v) Microphone shall have very good on/off axis & proximity response.
Electrical Specification:
i) Frequency Range: 50 Hz to 15 Khz
ii) Frequency Response: The microphone shall have ± 3 dB frequency response over a
range of 150 Hz to 1.2 Khz.
iii) Frequency response going up to maximum +10 db peak with reference to 1 KHz in the
High frequency range starting from 1.2 KHz to 15 kHz.
iv) Bass roll off giving roughly 8 to 10 dB attenuation at 50 Hz with reference to 1 kHz.
v) Polar Pattern: Cardioid/Super Cardioid.
(Typical polar diagrams at different frequency shall be supplied)
vi) Front to Back ratio: at least 10 dB from 250 Hz to 4 kHz
vii) Sensitivity: Better than 1.75 mV/Pa (-52.4 dBV – reference 0dBV= 1Volt/Pa)
viii) Output Impedance : ≤ 600 ohms for connecting to Audio input of Load impedance ≥
2000 ohms
ix) Connector: 3 Pin XLR
x) Environment conditions: The unit shall perform satisfactorily in the dry temperature
range of 50C to 40o C and humid conditions of 85% RH at 40o C.
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8. Condenser Microphone:
TECHNICAL SPECIFICATION
i) The microphone shall be designed for vocal recording with brightened mid-range and
bass roll-off.
ii) The microphone shall have cardioid /super cardioid pattern so as to isolate main sound
source and minimize background noise.
iii) The microphone shall have rugged metal body and shall have shock mount capsule to
reduce handling noise without compromising its acoustic properties.
iv) Microphone shall have hum compensation coil for providing hum rejection.
v)
Microphone shall have very good on/off axis & proximity response.
vi) The microphone shall be supplied with a table top stand & a break resistance stand
adaptor capable of rotating 180o.
Electrical Specification:
i)
Frequency Range : 50 Hz to 15 Khz
ii) Frequency Response : The microphone shall have ± 3 dB frequency response over a
range of 150 Hz to 1.2 Khz.
iii) Frequency response going up to maximum +10 db peak with reference to 1Khz in the
High frequency range starting from 1.2 Kz to 15 Khz.
iv) Bass roll off giving roughly 8 to 10 dB attenuation at 50 Hz with reference to 1kHz.
v)
Polar Pattern : Cardioid/Super Cardioid. (Typical polar diagrams at different frequency
shall be supplied with the tender)
vi) Front to Back ratio : at least 10 dB from 250 Hz to 4 kHz
vii) Sensitivity : Better than 1.75 mV/Pa (-52.4 dBV – reference 0dBV= 1Volt/Pa)
viii) Output Impedance : ≤ 600 ohms for connecting to Audio input of Load impedance ≥
2000 ohms
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ix) Weight : Shall not exceed 350 Grams (without cable)
x)
Connector : 3 Pin XLR
xi) On-off Switch : Mike shall have on/off switch
xii) Environment conditions : The unit shall perform satisfactorily in the dry temperature
range of 50C to 400 C and humid conditions of 85% RH at 400 C.
9.
Portable Solid State Field Recorder:
1. FEATURES AND FACILITIES
i)
The recorder shall be lightweight, reliable, rugged, small sized, self contained, one
hand operative with LCD display. The recorder shall be designed to withstand tropical
conditions.
ii)
The recorder shall have the facility to record on semiconductor memory.
iii) The recorder shall have the capability of recording stereo audio in 16 bit PCM linear
digital format (.WAV file format).
iv)
The buttons/switches for various operations like recording, play, pause, fast forward,
rewind/ review should be provided on the front panel in clearly marked logical layout.
The buttons/switches should be quite sturdy for reliable operation.
v)
The record/stop buttons should be so located that it should be possible to easily
operate the recorder for recording/stop while on move. Other necessary switches,
buttons and controls, etc. should be provided at easily accessible locations.
vi)
Necessary indicators showing the mode of operation, level, status of the battery and
the memory card capacity, recorded time and remaining time etc. should be distinctly
visible on LCD display panel.
vii) The LCD display panel shall have backlit display.
viii) The recorder shall have the facility to save and delete the recorded material.
ix) The recorder shall have built-in or externally attached Stereo microphone. The
capsule of this stereo microphone should be protruding out of equipment and should
be clearly visible. Stereo microphone connected to equipment using a cable shall not
be accepted. In case of externally attached stereo microphone, the connection should
be such that the microphone doesn’t get disconnected by sudden jerk.
x)
The equipment will also have the provision of connecting external microphone for
recording. This provision will be in addition to provision at Para 9. However, only one
microphone will be operational at a time. Necessary connector/cable for connecting
external microphone will be quoted & supplied.
xi) The recorder should provide facility for transfer of audio data to workstation through
USB connectivity.
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xii)
The equipment should have level indicators for displaying programme level during
recording/playback.
xiii) The equipment will operate on a battery of adequate capacity to support at least 90
minutes continuously recording. The equipment will have facility to indicate Low
battery level.
2. TECHNICAL SPECIFICATION
2.1 Recording/Play Mode
2.1.1 Recording media 2 GB (or higher) semi-conductor memory
2.1.2 Recording Format PCM Linear Digital (.WAV)
2.1.3 Supported Sampling Rate At least 32/44.1/48 KHz, selectable
2.1.4 Supported Bit Resolution ≥ 16 bits
2.2 Power
(a) Internal Battery AA or AAA
OR
(b) Internal Chargeable battery along with charger
OR
(c) (a) and (b) both
2.3 Input
(a) With a built-in /externally attached Stereo microphone
(b) Provision for connecting external microphone
(c) Provision for line input
2.4 Output:
Connectivity through USB 2.0 to Audio Workstation for Data Transfer
2.5 Monitoring:
Provision for headphone monitoring
2.6 Measurements
2.6.1 Frequency Response at Nominal input and output levels w.r.t. 1 KHz and from 50 Hz to
15 kHz : within ± 3dB
2.6.2 THD + Noise at -60 dBu input level and 0 dBu output level (50 Hz.to 15 kHz.) : ≤ 0.3 %
3. WEIGHT
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Total weight of recorder including batteries should be less than 500 grams (excluding carrying
case of equipment).
4. DIMENSIONS
The recorder should have compact body and its overall dimensions should be such that it can
easily be held in palm or pocket by the recording personnel.
5. CLIMATIC CONDITIONS
The unit should be designed to work satisfactorily and meet all the specifications in climatic
conditions as existing in India.
10.
Headphones
TECHNICAL SPECIFICATION
1.
Essential features of Headphone
i) The headphone shall be designed to reproduce full audio spectrum (without any
coloration) for quality monitoring in broadcast studios.
ii) It shall be lightweight in construction and shall have provision for stereo/mono
monitoring.
iii) Left & right earpieces shall be matched to reproduce stereo images correctly.
iv) The headphone shall have padded headband so that it is comfortable for extended use.
2.
Electrical Specification :
i) Frequency Range : The headphone shall reproduce faithfully audio in the range of 2022000 hz.
ii) Electrical impedance : Less than 75 ohms/Channel
iii) Sensitivity at 1Khz : 100 dB SPL at 1mW input
iv) Max Power handling capacity : 100 mW
v) Total harmonic distortion : 0.5% at max. permissible input level.
3.
Mechanical requirement :
i)
ii)
iii)
iv)
v)
vi)
Headphone Diaphragm material : Hard polyvinyl chloride or similar
Ear-pads Material : Leatherette and velvet
Sound coupling to ear/Transducer : Circum-aural/super aural
Average pressure on ears : Max 4/6 N
Cord Length (may be detachable) : At least 5 Meter
Phone Plug : Gold plated stereo mini jack (3.5 mm) with gold plated screw-on adaptor
(3.5 mm to 6.35 mm)
vii) Head-strap shall be adjustable.
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11.
Personal Computers
Intel Core i3 Processor, 2.93 GHz, 2 MB Cache, 800 MHz, 2 GB DDR2-RAM, 500 GB SATA
Hard Disk Drive, Double layer DVD Drive, Minimum 18.5” TFT screen, Multimedia
Keyboard, USB 2-button Optical Mouse, 6 USB 2.0 port(2 front, 4 Rear), 10/100 LAN, 2
Nos. Speakers, PCI slots, Genuine & licensed operating system (to be specified by applicant).
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12.
SOUND CARD
Specifications:
General
sample rates (kHz):
44.1/ 48/88.2/ 96/ 176.4/192
Main Inputs
dynamic range:
+14.0dBu (+4 dBu setting), +6 dBV (Consumer Setting), 0dBV (-10
DBV setting)
99 dB @ (A-weighted)
THD + N:
Less than 0.0024%, (at 0 dBFS)
frequency response:
20Hz to 20kHz ± 0.3dB,
impedance
10k Ohms minimum
max input:
Main Outputs
max output:
dynamic range:
THD + N:
frequency response:
impedance (unbalanced):
+14.0dBu (+4 dBu setting), +6 dBV (Consumer Setting), 0dBV (-10
DBV setting)
103dB (A-weighted)
Less than 0.0015%, (at 0 dBFS
20Hz to 20kHz, ± 0.3dB
150 Ohms
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13.
S. No.
1
1.1
1.2
UPS & Battery
Description of ON-LINE UPS
Out put
Capacity
Output Voltage
Specification
3 KVA single phase/3 phase
230 (default) 220,240 VAC (User Selectable Single
Phase)
+/- 1% Static, 5% Dynamic
1.3
Output Voltage Regulation
(Typical)
1.4
Output Connections
(6) ICE C13
1.5
Efficiency at full load, Nominal
Line
91%
1.6
50 Hz, +/- 3 Hz
1.7
1.8
Output FREQUENCY (Sync to
Mains)
Bypass
Overload Capacity
1.9
Output Voltage Distortion
1.10
1.11
Crest Factor
Heat Dissipation (Wars)
Nominal Line
Input
Nominal Input Voltage
Input Frequency
Input Connection
Input Voltage Range
Input Power Factor
Batteries
2
2.1
2.2
2.3
2.4
2.5
3
Automatic / Manual
105% + infinite,
125% + 1 Min.,
150% + 30 Seconds
< 3 % for Linear Load, < 5% for Non-Linear
Loads.
3:1
192
220,230 (default), 240 VAC single phase
45-65 Hz Auto-Selecting
IEC-C20
160-280 VAC (at full load), 100-280 VAC
>0.95
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3.1
Battery Type
Maintenance Free, Sealed, 5 Year Typical life time,
Exide / Amaron or equivalent
Recharge Time to 90 % Capacity < 3 Hours
Back up Time
30 Mins
Battery Rack
To be Provided
-5o C to + 45o C
Temperature
3.2
3.3
3.4
14.
PHONE- IN- UNIT
Essential features of Phone-in console
i)
ii)
iii)
iv)
v)
vi)
vii)
viii)
ix)
x)
The Digital Phone-in-console shall consist of a 19” Rack mountable base unit & a
wired Remote Control Unit.
Console should be DSP based and all the processing in the console shall be
performed in the digital domain. Console shall have at least 20 bit digital signal
processing for optimal performance at all time.
Console shall be capable of interfacing 2 or more PSTN or 2 or more GSM interface.
Console shall have two digital hybrids and a switch matrix to connect any of the
incoming call to either of hybrid.
It should be possible to connect two lines ON-AIR at a time independently or
simultaneously in conference mode.
The console shall provide two individual outputs containing only the Receive signal
(from caller) of Telephone line i.e. Caller’s Voice only of selected (ON-AIR)
telephone lines. These outputs shall be on Balanced XLR connectors in Analog
format.
The console shall have one input (“Send to Caller”) to send Mix-Minus signals from
Studio Console into the selected (ON-AIR) Telephone lines. This input shall be on
Balanced XLR connectors in Analog format.
It should be possible to control the levels of send (i.e. Studio console’s Mix-Minus
Output) & Receive (i.e. Caller’s voice) signals independently.
Each Hybrid shall provide AGC/limiting function and dynamic equalization for
Receive (“from Caller”) to ensure consistent caller audio levels. Necessary noise
gating and shaping features shall also be available to work on lines in noisy
conditions.
Each hybrid shall provide adequate separation, elimination of feedback and distortion
between send and receive signals.
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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xi)
xii)
xiii)
xiv)
xv)
Feature of caller ducking (dynamic reduction in volume of Caller’s voice when
announcer speaks) should be available.
It should be possible to screen the incoming calls, put them on hold/ON-AIR and
disconnect them using the remote control unit.
Control unit shall have Call control system and dialer, Visual telephone Lines’s
status (i.e. indication of connected lines, Calls on hold, Ready caller status and
callers ON-AIR Status etc.).
Audio level meters for send and receive signals of both the hybrids shall be available
on the front panel of the console/Control Unit.
The console shall provide music/audio to on-hold callers. It should be possible to
provide external audio input for on-hold callers.
Technical Specification :
i) Telephone Lines : 2 or more PSTN or GSM interface.
ii) PSTN Line Interface : Standard
iii) Line Input (“Telephone Transmit To Caller”)
a) Analogue : Balanced on XLR connectors.
b) Level : 0 dBu (Nominal) & 10 dBu maximum
c) Impedance : ≥5 k Ohm
vii) Line Output (“Telephone Receive From caller”)
a) Analogue : Balanced on XLR connectors.
b) Level : 0 dBu (Nominal) & 10 dBu maximum
c) Impedance : ≤ 200 ohms
viii) Isolation between send & Receive : >50 dB
xi) Digital Signal Processing : With in-build DSP (20 bit or better)
x) Audio Performance (On both Receive & Transmit Ckt )
Frequency response : 250 Hz – 3500 Hz, ± 1 dB
THD + N : <0.2%
Signal to Noise Ratio : > 55 dB
These measurements are to be taken with Phone line level of - 15 dBu and 0 dBu
at Line Input/output with various processing options turned off.
xi) Power Supply : 230 V± 5% AC 50±2 Hz , Single Phase supply
a)
b)
c)
d)
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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15.
Generator Set up to 5 KVA (Petrol/Disel)
DETAILED SPECIFICATIONS
Diesel engine and alternator shall be close coupled and mounted on a base plate of robust
construction.
SPECIFICATION FOR
CONTROL PANELS:
1.
ALTERNATOR,
DIESEL ENGINE AND MANUAL/AMF
ALTERNATOR:
(a) The Alternator shall be self excited and self regulated of specified KVA rating in
single/three phase at 240/415 Volt, 50 Hz, 1500 RPM and 0.8 power factor and shall
conform to IS:13364 (Part 1):1992(reaffirmed 2003)
(b) The alternators shall be screen-protected drip proof with Minimum IP-21 degree of
protection as per IS:4691/85.The class of insulation of the Alternator would be 'H'. The
rated voltage of Alternator will be 240V for single phase & 415 V for three phase.
2.
DIESEL ENGINE (Naturally Aspirated):
(i) Diesel Engine shall be air cooled, electric start developing required B.H.P at 1500
RPM with Class A-2 Governing or better for alternator to deliver continuous output of
specified power at 0.8 pf LAG at NTP conditions (all rating shall be tested at 0.8 PF
lag). The Diesel Engine should be capable of providing 10% overload for one hour for
every 11 hours continuous running at full load.
(ii) Naturally aspirated engines shall be ISI MARKED as per IS:10,001/1981.
(iii) The specific fuel consumption of engine shall be as per IS specn.
(iv) The Diesel Engine shall be complete with the following accessories:
(a) Fuel tank with capacity for 12 hours continuous running at full load.
(b) Engine instrument Panel consisting of starting switch with Key, Lube Oil
temperature and pressure gauges, cooled engines), RPM indicator and hour meter.
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(c) Safety controls to shut down the engine in the event of low lube oil pressure or high
cylinder head temperature in case of air-cooled engines or high water temperature in
case of water-cooled engines.
(d) Radiators in case of water-cooled engines.
(e) Exhaust silencer of Residential type.
(f) 12V starting system complete with starter motor, charging alternator and Cutout.
(g) Lead Acid Battery or semi maintenance free battery of suitable ratings with
connecting cables and the battery/ies shall conform to relevant IS Specn. The batteries
of only following make shall be accepted: Exide, TUDOR, Amco, Amaron, Amar
Raja, Tata Green, Cummins pulse lite, Standard Furukawa, Prestolite.
(h) Standard set of tools consisting of a set of 3 spanners, one screw driver, one standard
plier and one nose plier of appropriate size shall be provided to the consignees along
with DG sets, free of cost for each of DG sets.
3.
(i)
(a)
(b)
(c)
(d)
(e)
(ii)
MANUAL CONTROL PANEL:
The Control Panel shall have the following instruments:
Composite meter for digital display of
i)
Generator voltage.
ii)
Load Current.
iii)
Power Factor.
One MCCB of suitable rating for DG sets.
Push button-switch for ON and OFF operation.
Pilot lamps, three in case of single-phase and five numbers in case of three phase (one
for each phase, one for load on set and one for charging on).
Battery charger complete with voltage regulator, voltmeter and ammeter should provide
for Trickle charging as well as Booster charging for charging the battery from mains.
This will be in addition to the battery charging alternator fitted on the engine.
All the components in the control panel shall be properly mounted, duly wired
and labeled. Suitable terminals are to be provided for panel incoming and outgoing
connections. The instruments/Components shall be of reputed make.
4.
Supplier shall furnish complete & satisfactory TTC for engines, alternators complete
with enclosure to be used by them for EACH rating of DG sets clearly indicating make, model
and ratings of the DG sets tested at the time of registration and pre-dispatch inspection. The
TTC of three phase alternators shall cover 'unbalanced load test' as per cl.24 of IS:13364(part-1
or part-2)/1992 as applicable. However all the engine models /ratings shall need relevant
certifications as per norms. Either of the following types of TTC shall be acceptable:
i)
Type Test Certificate issued by recognized Government Lab.
ii) Type Test Certificate issued by recognized Government Lab irrespective of
whether engines and alternators were tested at firm's lab or some other lab, but
witnessed by Government representative.
iii) Type Test Certificate issued by BIS, irrespective of engines and alternators were
tested at firm's lab or some other lab, but witnessed by BIS/ Government
representative.
iv) Type Test Certificate issued by DQA on basis of test conducted at
manufacturer's lab in presence of DQA officers.
5.
The testing of diesel generating sets, for all ratings, shall be done at 0.8 PF lag.
6.
Testing shall be done at continuous power output for each rating.
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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7.
8.
9.
10.
a)
b)
c)
11.
15.
Necessary gauge/meters shall be fitted to indicate (a) the quantity of fuel left in the
fuel tank, and (b) hours of DG set operation.
DG Sets shall conform to norms of Central Pollution Control Board (CPCB).
DG sets shall meet the requirements of Environmental(Protection) Rules 1986 as laid
down by Min. of Environment & Forests read with GSR 371 (E) dated
17.5.2002,GSR 520(E) dated 01.7.2003 and No.448 (E)dated 12.07.2004 in respect
of noise and emission norms. DG sets shall also meet all other statutory requirements
as notified by Govt. from time to time.
Supplier shall furnish following documents issued by a Govt authorized agency at the
time of registration and pre-despatch inspection:
Type approval certificate (TAC) for emission norms for EACH model/family of
engine.
TAC from for noise level norms EACH model of DG set.
COP for EACH model of DG set and engine used in DG set.
Scope of supply shall include supply and commissioning of the complete DG set at
the consignee's end but shall exclude installation and erection.
Solar Power Generator:
TECHNICAL DATA SHEET OF SOLAR POWER PACK SYSTEM (1/2/3 kW)
Charge Controller
Type :
MPPT
Array Input:
40V-88V
Inverter
Type:
Bi Directional MOSFET Based, PWM with instantaneous sine
wave control of Micro Processor
Load Power Factor:
0.8 lag to Unity
Nominal Voltage:
240V AC
Frequency:
50Hz (±0.5Hz in stand alone mode)
Overload Capacity:
125% for 4m, 150% for 1m
Waveform:
True Sine Wave
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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Harmonic Distortion (Total): Linear Load Max <3%
Regulation :
±2%
Efficiency:
>90% (DC to AC)
Cooling :
Forced Air
Battery
Type:
Rating:
Voltage :
Lead Acid Wet Cell/Maintenance free
160 Amp/hour
48V
Environmental Features
Storage Temperature:
-25°c to +55°c
Ambient Temperature:
0°c to 40°c
Humidity:
Upto 95% RH, Non Condensing Acoustic
Noise Level:
<55db @ 1.5Mtr.
Altitude:
<1000Mtrs. Above sea level (without derating)
Protections/Controls/Indications/Additional Features must be available for the
following:
Load Surge Current:
Output Short Circuit:
Output Overload:
Output Over Voltage:
Output Under Voltage:
Battery Low Trip:
High/Low Frequency:
Over Temperature:
Input Surge Voltage:
Input Under/Over Voltage:
LED indication:
Array Blocking Diode:
RS 232 Port for Monitoring:
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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Auto Restart in case of Over Load Shut Down:
Alarms:
16.
For all Important Protections.
Split Air Conditioner (0.5 ton and 1.5 ton)
1. Air conditioners suitable for 230V, 50 Hz single phase AC supply shall be capable of
performing the functions as cooling, dehumidifying, air circulating and filtering.
The air conditioners shall be complete with automatic temperature control and cutincutout for variable temperature range 16 to 30 degree C. The differential of the
thermostat for cut-in-cut-out shall not be greater than +/- 1.75 degree C. The Air
conditioners may either be provided with adjustable step less type mechanical
thermostat or electronic thermostat as per IS: 11338:1985.
2. Outdoor unit of the air conditioners shall be fitted discharge cooled type rotary/sroll
type compressor operating on Refrigerant R-22 (or non-CFC refrigerant R-410A in case
of Split Air Conditioner) with suitably rated capacitor start electric motor.
It shall be equipped with overload protection and shall be mounted on resilient
mountings for quiet operation. The Rotary compressor shall be of Matsushita/Hitachi/
Toshiba/ Carrier/ Emerson/ LG /Tecumseh make and shall be covered by manufacturers
test certificate and TTC to JISS or ASHRAE.
3. The minimum thickness of the base in outdoor unit shall be 1.20 mm & sheet thickness
for rest of the body shall be 0.70 mm (Min.) with galvanized coating thickness of 120 g/
sq. m and shall be provided with stiffeners for robust construction and shall have
rounded corners. Galvanized sheet shall conform to IS: 277/2003.Steel parts/ front
panel etc. shall have stove-enamelled finish preceded by thorough cleaning of the
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
Page 44 of 47
surface, phosphated and undercoat of anti-corrosive primer paint. Alternate methods of
corrosion protection like plastic powder coating, electrostatic paintings shall also be
acceptable in lieu of stove enamelled finish.
4. The casing of the indoor units shall be made of ABS/HIPS/GS and shall be impact
resistant. The control box of indoor unit shall withstand flame retardant test to Grade VO as per UL-94. For impact resistance the unit duly packed and dropped from a height
of 1 m shall show no damage. The filter pads provided shall be washable.
5. Remote cordless control with LCD/LED Display shall be provided with one On/Off
timer, selecting fan speed (three speed) and setting up of temperature. Display shall be
provided on indoor unit or on handset or on both.
6. Maximum power consumption of the split air conditioners shall be measured at capacity
rating test conditions. Overall power factor of the unit shall be at least 0.85 at capacity
rating test conditions.
7. Servicing: Free servicing shall be provided for 15 months from the date of dispatch or
12 months from the date of installation of air conditioner whichever is earlier. Firm is
also required to send service engineer at least 3 times during the warranty period.
8. Warrantee: Warrantees shall be provided for 15 months from the date of dispatch or 12
months from the date of installation of air conditioner, whichever is earlier. The
compressor shall have additional warrantee under AMC of 4 years (In addition to above
warrantee of 12/15 months on whole unit.)
9. Installation: The installation charges at consignee's site shall include the following
work:i) Mounting/Fitting indoor and outdoor units at the respective locations.
ii) Laying refrigerant piping of 6mtrs length and connecting both the units after
drilling hole/holes in the wall, if required. The thickness of the copper tubing
shall not be less than 0.70mm.
iii) Insulating the suction pipe with expanded polyethylene foam with 5mm thick
tubing.
iv) Laying 15mm drain pipe 6m length to drain out the condensate water being
formed in the indoor unit.
v) Leak testing of the entire system.
vi) Charging Refrigerant gas in the unit.
vii) Suitable electric wiring between indoors and outdoors units up to 6 mtrs length up to
switch within 3 m of location of indoor unit. Switches/ Sockets /Plugs are not included
in the scope of supply.
Installation/ Warranty Charges for Split Air-Conditioner
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
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Split Air-Conditioner With Rotary Compressor (R22 Refrigerant)
Specification:The scope of installation shall include installation at consignee's site.
Specification :Split type air conditioners with BEE Star rating label & rating capacity conforming to IS:
1391(Part-2)-1992 with amdts No.1 to 4 fitted with rotary compressor suitable for using
HCFC refrigerant (R-22) for wall mounting .
17.
Broadcast Audio Processor:
Specifications:
1.
2.
3.
4.
5.
6.
a)
1.
2.
The Broadcast Audio Processor shall be designed for continuous, unattended and trouble free
operation in the broadcast chain of a VHF FM Transmitter at a community Radio Station.
The processor shall have Digital Signal Processing technique. It shall be able to provide
minimum 5 band audio processing with compression, limiting, clipping automatic wideband
gain control etc.
The processor shall have phase limiter to maximize audible transparency and should have
provision for stereo enhancement and high/low frequency enhancement.
The processor shall help to reduce noise and enhance loudness & clarity.
Radio Frequency Interference (RFI)/ Electromagnetic Compatibility (EMC) filters and power
supply surge protection shall be provided at the mains input.
The processor shall meet the following technical parameters:
Analog Audio Input:
Configuration:
Nominal Input Level:
Left and Right/ Stereo
Software adjustable from-4.0 to +12.0dBu
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
Page 46 of 47
3.
4.
5.
b)
Maximum Input Level:
A/D Conversion
Connectors:
Analog Audio Output:
1.
Configuration:
2.
Output Level(100% peak
modulation)
Signal to Noise:
(20Hz to 15 kHz )
Distortion (20Hz to 15 kHz)
Cross Talk:
(20 z to 15 kHz)
D/A Conversion:
Connectors
3.
4.
5.
6.
7.
c)
1.
2.
d)
1.
1.
2.
3.
f)
Left and Right/ Stereo. Flat or pre-emphasized (at
50µs or 75 µs) software selectable.
Adjustable from -6.0 to +20 dBu software
adjustable.
≥ 80 Db unweighted
≤ 0.02% THD.
≤ -70 Db
Minimum 24 Bit
Balanced XLR Male, EMI Suppressed.
Remote Computer Interface:
Configuration
Connectors:
TCP/IP Protocol via modern of Ethernet interface
RS-232 Port or RJ-45, EMI Suppressed
Power:
Voltage
230 Volts AC ± 5%, 50Hz ±2%
Connector:
IEC, EMI Suppressed, detachable 3-wire power
chord.
UL, CE.
Safety Standards:
e)
+24 dBu (impedance>10kΩ)
Minimum 24 Bit
Balanced XLR Female, EMI Suppressed.
Environmental:
Operating Temperature:
Relative Humidity:
Working Altitude:
00 to 500 C
Up to 95% Non Condensing
Up to 3000 Mts. Above mean sea level.
Physical
1.
Dimensions:
2.
Weight:
To fit in Standard 19” Rack. Width, Height & Depth to
be specified by vendor.
To be specified by the vendor
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment
Page 47 of 47
18. Dummy Load:
Dummy Load of 50 Watts, matching transmitter specifications.
Report of Technical Committee constituted to lay down specifications/benchmarks for CRS equipment

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