AM Broadcasting Station Design

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Introduction

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I. INTRODUCTION

MISSION

Radyo Sang Masas mission is to provide trusted source of information and up to date

news regarding the lives of a true born Filipino. The station aims to take part with the regions

latest happenings and thus to provide unbiased news locally and even about the nations

trending topics. It also aims to open up the eyes of its listeners when it comes to the most

sensitive news which may happen to affect their everyday lives. The station will be all about

cultures in which it will be delivered in sustainable ways that meet their needs while

strengthening the civic and cultural life of the communities we serve. Finally, this station aims

to provide never ending entertainment to its avid listeners. With its lively broadcasters and

DJs, Radyo Sang Masa will be your one of a kind radio station.

VISION

Radyo Sang Masas vision is to be valued, to inspire its listeners to look at life in a

different point of view and to be the regions leading information provider. The station

envisions to educate, entertain, and empower its audience in order to create a better and more

sustainable future for the province.

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RADYO SANG MASA Daily Programs

Note: Commercials may occur in between programs.

TIME PROGRAM

6:00 am Morning Prayer

6:05 am Pambansang Awit

6:05 am 7:00 am Morning News

7:01 am 7:30 am Entertainment News

7:31 am 8:00 am Commercials

8:01 am 11:00 am Lakbay Aral Pagtuklas

11:01 am 12:00 pm Regions Trending Topics

12:01 pm 12:30 pm Commercials

12:31 pm 3:00 pm Dramaserye

3:01 pm 6:00 pm Afternoon Jamming

6:01 pm 7:30 pm Evening News (Local)

7:31 pm 8:30 pm Evening News (Nationwide & Worldwide)

8:31 pm 9:30 pm Evening Drama

9:31 pm 12:00 pm Evening Jamming

12:00 pm Closing

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Description of the Radio Station

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II. DESCRIPTION OF THE RADIO STATION

A. Frequency Selection

Frequency Name Company Format Call Sign Power Covered

Location

630 kHz Bombo Radyo

Bacolod

Bombo Radyo

Philippines News DYWB 10 KW Bacolod

684 kHz Aksyon Radyo

Bacolod

Pacific Broadcasting

Systems News DYEZ 10 KW Bacolod

747 kHz RMN Bacolod Radio Mindanao

Network News DYHB 10 KW Bacolod

900 kHz Radyo Sang

Masa ENEC5A Network

News and

Public Affairs DYDZ 1kW Bacolod

1035 kHz Abyan Radyo Radio Corporation

of the Philippines News DYRL 10 KW Bacolod

1080 kHz DZRH Bacolod

Manila

Broadcasting

Company

News and

Public Affairs DYBH 5 KW Bacolod

1143 kHz

Veritas 1143

Radyo Totoo

Bacolod

Catholic Media

Network News DYAF 5 KW Bacolod

1179 kHz Super Radyo

DYSB Bacolod GMA Network News DYSB 1 KW Bacolod

1404 kHz Radyo Ronda

DYKB

Radio Philippines

Network / Solar

Television Network

News DYKB 1 KW Bacolod

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B. Frequency Map

Frequency Map of the AM Station, DYDZ showing the upper and the lower sideband and its

corresponding frequencies.

C. Frequency Spectrum

Frequency Spectrum showing the DYDZ AM Station operating with a frequency of 900 kHz and its

two neighboring AM Stations namely DYHB RMN Bacolod with an operating frequency of 747 kHz and

DYRL Abyan Radyo with an operating frequency of 1035 kHz.

fc = 900 kHz

flsb= 895 kHz fusb= 905 kHz

fm = 5 kHz fm = 5 kHz

Bandwidth = 10 kHz

fc = 747 kHz

fusb = 752 kHz flsb= 742 kHz

fm= 5 kHz fm= 5 kHz

Bandwidth = 10 kHz

fc = 900 kHz


fm= 5 kHz fm= 5 kHz

Bandwidth = 10 kHz

fc = 1035 kHz


fm= 5 kHz fm= 5 kHz

Bandwidth = 10 kHz

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D. Vicinity Map

Figure 1. Map of the AM Station

Figure 2. Map of the AM Transmitter

AM Transmitter

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E. Antenna and Studio Location

Location: Rm. 4, 2F Victorina Arcade, Rizal Street, Bacolod City Latitude: 1040'10.11"N

Longitude: 12256'53.38"E

Location: Reclamation Area, Bacolod City Latitude: 1040'15.74"N

Longitude: 12256'30.07"E

Figure 3. AM Studio Location

Figure 4. AM Transmitter Location

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Studio Plan / Design

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III. STUDIO PLAN/DESIGN

A. Floor plan

Figure 5. Station Floor Plan

Figure 6. AM Studio Floor Plan

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B. Studio Equipments and Specifications

Yamaha mixing console

The fantastic Yamaha MG mixers are giving Mackie, Spirit and Behringer a run for their money. "We have a winner" and "reasonably priced, effects laden, mixer solution" says Music Mart magazine - Aug 03.

Specifications: Frequency Response: 20Hz-20kHz THD:

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RMServer : Remote Monitoring Server

Specification:

Control

Logic Input Phoenix 6-pin male connector, two optically isolated inputs for receiving contact closures for external muting

Logic Output Phoenix 6-pin male connector, reports relay closures (and openings) for external muting and/or fault reports

RMS FT-10 Network Connections Equipped with two-conductor twisted-pair network, reporting all

operating parameters of amplifiers to system operators host computer running Compass Software (50 Node Maximum). Data Speed is 78Kbps serial bus

Ethernet Network RJ-45 port for network connection and control of on-board web server from a Mac or Windows-based computer. Full bidirectional communication with Meyer Sounds Compass control software within a client-server architecture. Supports IPv4 and IPv6 simultaneously. IEEE 802.1, 802.3 Compliant. One MAC address

Mounting Removable Feet Included Optional Rack Mount Kit Available Optional Wall Mount Kit Available

Network/Control Front Panel Illuminated LED Indicators for fault, client connection, RMS FT-10

receive, Ethernet, and power Network RJ-45 port for network connection and control of on-board web

server from a Mac or Windows-based computer. Full bidirectional communication with Meyer Sounds Compass control software within a client-server architecture.

Protocols IEEE Std 802.3 ( 100BASE-TX ) RFC 791 (IPv4) RFC 6434 (IPv6 Node Requirements) RFC 3927 (Dynamic Configuration of IPv4 Link-Local Addresses) RFC 6763 (DNS-Based Service Discovery) RFC 2616 (HTTP/1.1) IEEE Std 1722.1-2013 (ADP and AECP AEM)

Software Full bidirectional communication with Meyer Sounds Compass control software within a client-server architecture

AC Power Connector powerCON 20

Operating Voltage Range 100240 V AC, 50/60 Hz, 30W Max Current Draw 0.2A rms (115 V AC); 0.13 A rms (230 V AC); 0.3 A rms (100 V AC)

Physical Dimensions 1-space rack 1/2 width

8.50 w x 1.73 h (1.85 h with feet) x 7.23 d (215.9 mm x 44 mm [46.9mm with feet] x 183.6 mm)

Weight 3.78 lbs (1.71 kg)

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AUDIO-TEVHNICA ATH-M50

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SPECIFICATIONS AUDIO

TO CLEAN FEED OUTPUT

Impedance : 10k Ohm, electronically balanced

Common mode rejection : >30dB

Maximum input level : +26dBu

Nominal input level : +4 dBu

Frequency response : 20Hz 15kHz

Connectors : STEREO JACK

TO MIC INPUT

Impedance : < 50 Ohm, electronically balanced

Common mode rejection : >30dB

Maximum output level : -20dBu

Nominal output level : -30dBu

Bandwidth to telephone line : 250Hz 4kHz, -3dB ref 1 kHz

Telephone line impedance : Nominally 600 ohm

Telephone line impedance range : 300 ohm to 1500 ohm

Connectors : STEREO JACK

GENERAL

Distortion : Less than 0.1% (0 dBu out)

Power supply : none (passive)

Power consumption : none

Dimensions : 1 HE front panel: 482 x 44 mm

: Frame: 240 x 44 x 175 mm (width x height x depth)

Weight : 1.5 kg net including packing

PHONE CONNECTIONS (POT)

PHONE : RJ-11 phone connectors

WALL (line) : RJ-11 phone connectors

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Sound Blaster ZXR

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C. Block diagram

Figure 7. AM Studio Block Diagram

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Transmitter Layout and Connectivity

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IV. TRANSMITTER LAYOUT AND CONNECTIVITY

Connectivity

Studio

Generator

STL Transmitter

STL Receiver

Generator

AM Transmitter

AM Antenna

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A. STL block diagram

Studio to Transmitter Link Block Diagram

Figure 8.Transmitter and Receiver Block Diagram of Studio to Transmitter Link

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B. System block diagram

System Block Diagram

Figure 9.STL Transmitter (A & B) Block Diagram

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Figure 10.STL Transmitter SR04A/SR04B Tray Block Diagram

Figure 11.STL Transmitter Antenna Change Over Unit

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Figure 12. STL Receiver (A & B) Block Diagram

Figure 13. STL Receiver SR04A/SR04B Tray Block Diagram

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C. Equipment Specifications

Equipment Specifications

NICOM MT/MR Studio to Transmitter Link TX/RX Pair

Model: TSL 910 STL Transmitter

Features: Frequency Ranges: 940 to 960 MHz - 200 to 240 MHz - 300 to 330 MHz +other

frequencies upon request;

Output Impedance & Connector: 50 ohm type 'N' female;

Harmonic Frequencies Level (ref. to carrier): < -65 dB;

Spurious Frequencies Level (ref. to carrier): < -80 dB;

Input Impedance: 600 ohms or greater;

Input Level: -6 dBm to +10 dBm nominal for +/-75 Khz deviation adj.

Model: RSL 900 STL Receiver

Features:

Frequency Ranges: 940 to 960 MHz 200 to 240 MHz - 300 to 330 MHz + other frequencies upon

request;

Input Impedance & Connector: 50 ohm type 'N' female;

Audio Frequency Output: 0 dBm at 600 ohms +/- 6dB adj.;

IF Output: 0dBm at 10.7MHz / 50 ohms;

De-emphasis: 50 / 75us;

Input Voltage Range: 10uV - 30mV rms.

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NICOM RADIO STL ANTENNA

Model: RKB 14

This antenna was created to be used for STL purpose. It is very light and easy to use. Due to its construction, this antenna is not suggested to be used in areas with severe weather. It comes with N type connector. TECHNICAL SPECIFICATIONS Antenna type 14 element directional antenna Frequency range 940 - 960 MHz Bandwidth 20 MHz Impedance 50 ohms Connectors N type Power rating 20 watts max. VSWR < 1.2 Polarization vertical or horizontal Gain 12.3 dB (referred to half-wave dipole) H plane 48 degrees V plane 60 degrees Front-to-back ratio 22 dB min. Lightning protection all parts grounded Max wind velocity 100 mph (165 km/h) Wind load 35 Lbs (16 kg) Materials (external) Aluminum Mounting from 1" to 3" Weight 3 Lbs ( 1.4 kg) Dimensions 56"7"3" (142217876 mm) Packing 57"8"4" (1448203102 mm)

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10 KW SOLID STATE AM TRANSMITTER

Model: NAUTEL AMPFET ND10

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TECHNICAL SPECIFICATIONS

Configuration: 8-1.25 kW Power Amplifier/Modulator subsystem modules (each with integral

cooling fan). Main and Standby exciter sections with Audio and RF Drivers

Power Output: (Rated) 10,000 watts (Capable) 11,000 watts

Five preset power levels between 1,000 and 11,000 watts are selectable via LOCAL or REMOTE

control. Output level stabilized against ac supply voltage variation

RF Frequency Range: 531 kHz to 1620 kHz, prefitted to one frequency as ordered

RF Terminating Impedance: 50 ohms unbalanced, 1-5/8 inch EIA O/P Flange

Type of Modulator: NAUTEL Pulse Duration Modulator

Audio Frequency Response: 0.5 dB, dc 10,000 Hz Audio input low pass filter selectable

between Butterworth and Bessel response

Square Wave Overshoot: 2% at 400 Hz (typical with Bessel filter active)

Square Wave Tilt: 3% or less at 40 Hz

Audio Harmonic Distortion: Better than 1% (THD) at 95% modulation 30-10,000 Hz, 2.5 kW to

10 kW, 1.5% (THD) at 950% modulation, 10,000 Hz, I kW to 2.5 kW (Reduced antenna

bandwidth may degrade specification)

Audio Intermodulation: 1 % or less at 10 kW 60/7000 Hz 4:1 ratio

Distortion: SMPTE Standards at 85% modulation

AM Stereo (RF Phase Shift): Incidental Quadrature Modulation (IQM) 36 dB or better (40 dB

typical) below 95% modulation 30-10,000

Modulation Capability: 125% positive peak modulation capability to 11,000 watts

Carrier Shift: Not exceeding 1%

RF Harmonics: 80 dB or more below 10 kW output

Spurious Outputs: 80 dB or more below 10 kW output

Noise and Hum (Unweighted): 60 dB or more below 100% modulation at 10 kW

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Frequency Stability: 5 Hz or 5 ppm whichever is greater over temperature range

Audio Input: 600 ohms active balanced + 10 dBm nominal Adjustable 0 to +12 dBm for 100%

modulation


Power Input: 198-242V 50/60 Hz three-phase 3 or 4 wire 385-465V 50/60 Hz three-phase 3 or 4

wire. Other voltages available

Permissible Power

Supply Variation: 5% voltage 5% frequency

Power Consumption: 13.3 kW at 10 kW, 0% modulation, 20 kW at 10 kW, 100% continuous

sine wave modulation

Power Factor: 0.98 typical

Overall Efficiency: Better than 75%

Metering: Forward Output Power

Reflected Output Power

DC Input Current and Voltage to Power Blocks,

DC Current Meters, each 1.25 kW Power

Amplifier/Modulator Subsystem

Remote Control: Transmitter, ON/OFF

Selection of Exciter A or B

Power Level selection 1, 2, 3, 4, 5

Power Trim

Remote Monitoring: Forward Power Output

Reflected Power Output

Status of Critical Parameters

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Ambient Temperature: -10 to 50C (derate 3C per 500m/2 per 1000 ft. above sea level)

Humidity Range: 0-95%

Altitude: 0-4000m (0-13,000 ft.)

Size: 114cm x 61 cm x 183cm (45. in. wide x 24 in. deep x 72 in. high) .68 sqm (7.5 sq. ft.) Floor

Weight: 530 kg (1165 lbs.)

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Transmission Line

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V. TRANSMISSION LINE

Technical specifications for 1/2 inch Cellflex:

Structure

- Impedance: 50 ohms

- Inner conductor: Copper wire 4.9mm

- Dielectric: Low Loss foam polyethylene 11.6mm

- Outer conductor: Coffugated copper tube

13.7mm

- Jacket: Polyethylene, black 16mm

Mechanical properties:

- Weight: 0.35Kg/m

- Minimum bending radius, single bending: 70mm

- Minimum bending area, repeated bending: 200mm

- Max tensile force: 1470N

- Recommended temp. Range: -40C to +60C

- Recommended temp. Range during installation: -25C to +60C

Electrical properties:

- Characteristic impedance: 50 +-1 ohms - Velocity factor: 88%

- Capacity: 76pF/m - Max operating frequency: 3000MHz

- Cut-off frequency: 10200 MHz - Peak power rating: 25.6KW

- Peak RF voltage rating: 1.6KV

- DC-resistance inner conductor: 0.97ohm/Km

- DC-resistance outer conductor: 1.9ohm/Km

Attenuation:

- 10MHz: 0.67 db/100m - 30MHz: 1.17 db/100m

- 88MHz: 2.02 db/100m - 100MHz: 2.16 db/100m

- 108MHz: 2.25 db/100m - 200MHz: 3.08 db/100m

- 900MHz: 6.8 db/100m - 1500MHz: 9.0 db/100m

- 2300MHz: 11.4 db/100m - 3000MHz: 13.2 db/100m

Power handling (1/2inch Cellflex):

- 30MHz: 7.27KW - 88MHz: 4.2KW

- 108MHz: 3.94KW - 150MHz: 3.2KW

- 450MHz: 1.8KW - 1250MHz: 1.05KW

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Antenna Plan

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VI. ANTENNA PLAN

A.) Antenna characteristics, input impedance, polarity, height in wavelength, construction type

Radyo Sang Masa will be using an inverted vee antenna configuration due to the

limitations of space. An inverted vee antenna is a type of antenna wherein the two dipoles of the

sides are perpendicular to each other instead of parallel. It is used in areas with limited space

because of its properties that are able to reduce ground foot print of the antenna without

compromising performance. The gain of an inverted vee is similar to that of a dipole at the same

elevation because most of the radiation is from the high-current portion of the antenna. Antenna

modeling software bears this our for free-space models, predicting maximum gain of 2.15 dBi

for the dipole and 1.9 dBi for the inverted vee. When viewed from the side, the antenna looks

like an English letter V turned upside down, hence the name inverted vee. These antennas are

commonly used by amateur radio enthusiasts or stations, and on sailing vessels requiring better

HF performance. Typically, the inverted vee antenna requires only a single, tall support at the

center and the ends can be insulated and secured to anchors at or near ground level. This

arrangement are very advantageous when in a limited space.

Figure 14. Inverted Vee Radiation Pattern

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Figure 15. Inverted Vee Antenna Configuration Pattern

Antenna Height/Radiator length computation:

=

=

3108/

900103 = 333.333 meters

Radiator Length, Ra =

4 =

333.333

4 = 83.333 meters = 293.402 foot

Apex Angle = 90 degrees

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VII. REFERENCES

http://www.gbaudio.co.uk/data/yamaha/mg12.htm

http://www.meyersound.com/sites/default/files/RMServer_ds.pdf

http://eu.audio-technica.com/en/products/product.asp?catID=5&subID=39&prodID=266

http://www.soundblaster.com/products/sound-blaster-zxr.aspx#specs

Studio Transmitter Link, Published by: BADRAJPUT on Dec 05, 2010, Copyright: Attribution Non-

commercial

http://www.nicomusa.com/#!rkb-14/c1139

http://www.trcorp.com/rdstl.html

http://www.trcorp.com/products/Radio/Nautel%20AMFET%20ND10.html

Documents

AM Broadcasting Station Design