100W F M Transmitter [ 1+1 ]

TWIN FM 100W is fully solid-state design configuration to the up-to-date technology in the field of broadcasting Equipments.
The equipment is rugged in construction and easier to install at site because of single frame construction of cabinet.
Majority of circuits are designed in the form of Printed Circuit Boards and combined into functional plug-in Modules. Thus maintenance and service is easily carried out.
The transmitter adopts latest state-of-art approach in sound Broadcast. This makes the equipment less complex, economical with high flexibility.
More sophisticated Digital technology used for L O to get better S/N.
FM Digital Exciter makes use of Synthesized Local Oscillator having 10 KHz step size with better FM noise where by LO frequency can be varied just by setting Push – push switch mounted on front panel.
Power Amplifier has been designed to give stable power output for through out FM band for continuous operation and modular so as to use part of the unit at lower power in emergency condition.
Power Amplifier having separate palletized amplifier blocks for ease maintenance.
Driver Amplifier is having class-AB driver for better linearity and class-AB LDMOS final Power Amplifier for better efficiency with inbuilt solid-state protective circuits.
Strip line Low Pass Filter has been used to obtain clean spectrum and eliminates out of band spurious/inter-modulation products.
Class-AB Power Amplifier and Switch Mode Power Supply make the transmitter highly efficient hence more economical by cutting down the recurring expenditure in electricity bills drastically (Overall 30 % efficiency).

Remote Control System:

Transmitter level ‘ON/OFF’ facility.
Auto/Manual mode selection of the transmitter.
Switch over from main transmitter to standby based on "ON Line testing of health of transmission".
Control and monitoring facility from remote place through dial-up modem.
RS232 Communication for Local PC for monitoring of different parameters of the transmitter.
Timer Operation for transmitter ON/OFF
Ease of operation, maintenance and installation.

Transmitter System is consists of the following main Unit.

100W FM Transmitter (1 + 1) model no. : make
RF Change over unit with RF Switch. make: model no.
Transmitter wired Rack
RF dummy load.
2 Bay omni directional Antenna
UPS
RF cable assembly
Other accessories to complete the transmitter system

Specifications

Sr. no.	Descriptions	Parameters
01	Frequency Range	87.5MHz to 108 MHz
02	Frequency deviation	+ 75kHz (with 1kHz. 0dBm input) Capable upto + 100kHz
03	Frequency Setting	Direct from front panel in 10kHz
04	Stereo Transmissions	450-1, Section 2.2 (Pilot tone system)
05	Pre-emphasis	75 micro seconds
06	Input level	-6 to +10 dBm
07	Input impedance (Mono)	600Ω (balanced)
08	Input impedance (Stereo)	10 kΩ (unbalanced)
RF OUT PUT
01	Output power RF	100Watts, Continuously variable from 10 to 100W or adjustable continuously
02	Output impedance	50Ω (Unbalanced)
03	Output connector	N (F) connector (Rear)
04	Permissible VSWR	1.5: 1on full power; Automatic power reduction beyond 1.5:1. It is protected for short and open circuit conditions at full power .
05	Harmonic and spurious signal suppression	Better than –70 dBc (87.5 to 130 MHz)
06	Maximum frequency tolerance	+ 300 Hz
07	Asynchronous AM S/N ratio	60 dB
08	Synchronous AM S/N ratio	50 dB
WIDEBAND COMPOSITE OPERATION
01	FM S/N ratio at 75 kHz deviation	Better than 70 dB with out CCIR filter
02	Total Harmonic Distortion (30 Hz to 15 kHz)	Less than 0.2%
03	Amplitude response (30Hz to 15KHz)	+ 0.5 dB
MONO OPERATION
01	FM S/N ratio	Better than 70 dB
STEREO OPERATION
01	Stereo separation (sine wave)	Better than 50 dB (30 Hz to 15kHz)
02	Stereophonic Cross Talk	Better than 50 dB
03	FM S/N ratio	Better than 70 dB
04	Total Harmonic Distortion	Less than 0.5%
05	Audio Amplitude Response	+ 0.5 dB
06	Pilot Tone Frequency Stability	Better than + 1 Hz
POWER SUPPLY
01	Operating Line Voltage	AC Single Phase: 230V+10%
02	Frequency	50 Hz + 4%
03	Power Factor	Better than 0.9
04	Power Line Harmonics	IEEE 519-1992