go ...


corporate services client login alliances profile Press careers
 HOME
contacts site map inquire

Multi Access Rural Radio


MULTI ACCESS RURAL RADIO
MARR consists of a Base Station Unit (BSU) connected to the network through trunk lines, and the remotes are provided in the remote locations. The remotes (RSU) can be as far away as 45 Kms clear line of sight.

 






PRODUCT DESCRIPTION


Typically 20 locations can share 8 Radio Channels or 4 channels can be shared by 36 channels
Is an ideal equipment for connecting different location on shared Radio channel basis
Equipment Works on VHF/UHF Band.
This has been extensively used to provide rural communication links for connecting Rural communities to the PSTN. Equipment is transparent to any signaling/dialing plans and usually is set for CCITT type 5 MFR2 signalling.
At BSU an omni directional antenna is used
At RSU end a yagi antenna is used.



Features

Broadcast messages from any RSU through the base station.
Group call facility from BSU or any RSU.
Dialing plans & interfaces.
230V AC compatible.
Extension of range through suitable repeaters.
Pre-defined call duration setting.
Compatibility with DTMF & Pulse dialing.
Monitoring of RSU status from BSU station.
Extension of subscribers up to 120.



Application
 
Private networks
Remote Hilly Areas /Sites where in Laying Cables is a constraint .



Mechanical Dimension

Base Station Unit (BSU) Rack Ht - 3 Ft Antenna Omni Directional 15 feet Tower as required
Remote Station (RSU) (L X B X H) = 320 X 95 X 280



Specifications

No of Radio Channels

4/8

No of Remote Subscribers

20/40/90/120

Frequency Range

VHF / UHF

Tx-Rx separation

25 MHz

Type of Modulation

FM

S/N ratio at 1Khz over a single hop for 10 micro-volt RF signal input

50 db Min



Transmitter Specifications

 

  Power at Antenna port

2 Watts (Min), 5Watts (Max)

Freq deviation for 1kHz tone

3.3KHz + 0.3 KHz a level of 0dbm at 2W points

Maximum frequency deviation

5KHz peak (Max) of +5dbm at 2W points

Signalling frequency deviation

a. 125/3825 Hz Tone : 1.3 KHz + 0.3 KHz (max)
b: DTMF Tone : 2.5 KHz + 0.6 Khz

Frequency stability of carrier

5 ppm or better

Spurious

25 Microwatts

Protection

Tx shall be protected against infinite VSWR

Cooling of Transmitter

Natural cooling

Output connector@ antenna

N male




RECEIVER SPECIFICATIONS

 

Type

Superhetrodyne

Intermediate frequency

10.7 MHz and 0.455 MHz

Sensitivity

a: 12dB or better SINAD for a level -107dbm at Antenna port.
b: S/N ratio of 50dB or better for RF level of 87dbm at Antenna port.

Image Rejection

80dB or better

Selectivity at + 25KHz from Rx freq

60dB or better

Squelch

-116 dBm +3 dBm

Hysteresis

2 + 1 dBm

LO frequency stability

5 ppm or better

Input Connector

SMA female

Overload point of Receiver

-20 dBm or better





Get in touch with us if you require more information about MARR
 


click here to find out more about your personal briefcase... SOLUTIONS INDEX more...
Access Solutions
ADSL Solutions
Application Services
Application Development
Application Networking
ATM Switches
BFSI Services
BPO Services
Business Continuity
Broadband Solutions
Content Services-VOD
Centers for Excellence
Competence Centers
Data Warehousing
Document Management
Digital Microwave Radios
Digital Pairs
Digital Home Solutions
DWDM 32
E1/T1 Modem
Energy Sector Solutions
Energy Systems
FWP CDMA
FWP GSM
FTTH Solutions
Government-to-Citizen
Governance  Networks
GSWAN
HSRP
Hosted Solutions
Interoperability Services
IP DSLAM
IP Networks
Intelligent Networks (IN)
Metro Area Networks
Rural Radio (MARR)
Managed Healthcare
Next Generation Networks
Network Management
Optical Network Solutions
Operations Management Services
OSS Services
OLTP
Police Networks
RF Tags
Routing and Switching Solutions
SDSL UDSL 36 Modem
Convergence Services
Security Solutions
Storage Area Networks
Wide Area Networks
Switching Solutions
Telemedicine Solutions
Telecenter Solutions
Terminal Equipments
Testing Services
Training Services
Transaction Services
Transportation Sector
Transmission Systems
Turnkey Solutions
Utility Networks
Vehicle Tracking
Vehicle Management
VMUX - 120 Channels
Wireless


be united!
more...

 

more...
     
 

© 2006, united communications ltd. all rights reserved.