500W VHF LPT [1+1] TV Transmitter

Model No.: TW/VHF/500W/02

Quick Specifications

Frequency - Any one channel in Band-IV/V in the frequency range of 174-230 MHz CH 2-13
Power Output - I) 500 Watts (Sync Peak) for vision, II) 50 Watts for Aural
System consists of 2 Nos of TV Transmitter rack, 1 Nos of Change over Rack
Transmitter Rack consists of Power Amplifier, Driver Amplifier, Exciter, SMPS, Mains panel
Change Over Rack consists of 1 5/8" O/P RF Port, Band Pass Filter, Auto switching Unit, Control Panel, RF switch.
Modular Construction - Easy service and Plug in approach
Conventional and Forced Air cooling
Multi standards and frequency bands supported.
Broad Band R.F. Amplifiers based on LDMOS Technology
The R.F. output stages are implemented by two LDMOS pallets combined with 3dB 90° hybrid coupler, this is applied to all R.F. amplifiers working in BI, BIII and BIV-V. The Power Amplifier is wide band, Palletised and sufficient solid state protecting circuits.
Local Oscillators Synthesizer
Synthesized local oscillators offer normal offset capability. Programming of Local oscillator from Front panel.
Plug-in modules for versatility and on-site easy maintenance
TV Transmitter is composed by several plug-in modules mounted on a standard U, 19" rack cabinet.
All frequencies locked to a single reference – High Frequency satiability.
Metering and Monitoring controls
Monitoring and alarm functions are available on the metering digital display, parameters and telecontrols are provided on the RS 232 serial port.
High reliability and ruggedness
The mains transformer provides safety isolated low voltage to high reliability switch mode power supplies, the R.F. power amplifiers flanged devices are directly mounted on the convection cooled rear heat sink. RF-overdrive, high VSWR, high HS temperature, crow-Bar are standard protections.
Unattended Low Power TV Transmission system
Built in Redundancy even at Transmitter stage so this can be used unattended.
Rugged in Construction and can bear Voltage fluctuations.
Band Pass Filter used to have clean spectrum.
AGC and ALC Controls
Linearity Corrector
Excellent Noise Figure
Saw Filter
Sync restore
Group delay corrector
Automatic white level and Sync limiter
Multi standard Modulator
SMPS used and state of art of technology results into transmitter efficiency 28%.
Low Power consumption.
Soft start facility.
Solenoid Coaxial RF switch is used for Transmitter change over.
Remote Control operation through Auto Switching unit, PC – RS 232 std, Telephone line
Monitoring rack can be supplied with system -optional