500W Analog TV Transmitter

Overview:

• This product is the all solid-state Single-channel TV Transmitter, it adopts professional TV exciter, and it can use the single/duel  exciter configuration, switching automatically.
• This transmitter has a variety of linear and non-linear pre-correction function, carrier frequency offset, and precision bias (with external precision reference source) function.
• It can prefabricate and control the half-power output, and it has remote control telemetry interface.
• The power amplifier used LDMOS FET, the analog and digital are both compatible, and it used high-quality switch parallel power.
• The power amplifier and power supply are both used hot-plug devices.
• The power loss and standing wave of the one-time synthesis power combiner is small.
• The module of power amplifier display the working parameters in real-time.
• The whole machine has the protection of over-current, over temperature, over power and over-standing wave ratio.
• The master touch screen displays the working parameters of the whole machine and the module of power amplifier (PA) in real-time.

Features:

• The whole machine is single-channel, image with audio together.
• The redundant configuration design can reduce the rate of inactive to zero.
• The exciter redundancy design: the main exciter and its spare exciter can switch automatically (the spare exciter is optional). When the main exciter broke down, it can switch to the spare exciter uninterrupted.
• The power amplifier redundancy design: multiple amplifiers integrated; the modules of PA are high-consistency. These two exciters are the spare one with each other and can exchange easily.
• The power supply redundancy design: parallel current sharing power from multiple switching power supply; the computer can monitor power supply’s working condition and adjust its working condition automatically.
• The management and monitoring are intelligent and on network, it has the external PC interface.
• It has the technical data detection, monitoring systems and full-featured computer control software with auto-diagnostic function. All technical parameters can be read through the LCD display panel.
• Comprehensive protection measures can reduce the damage of equipments. This machine has protection about no video; VSWR is too large, overheating, over-stimulus, missing phase protection and lightning protection. The switch has protection about overvoltage, over current, under voltage, over temperature, short circuit and lightning protection.
• All power supplies are switching power supplies; high efficiency, excellent regulator range, strong adaptable from the change of the external voltage.
• It adopts modular design concept.
• Hot-pluggable design: power amplifier and switching power are supporting the Hot-plug, it’s easy to debug and maintenance; improve the reliability.
• The fan is built-in the chassis, the transmitter has a compact structure and a beautiful shape.

Technical Specifications:

Overall performances:

1. Working frequency: VHF/UHF
2. Output power: 500W
3. Output impedance: 50Ω
4. VSWR of output load impedance: ≤1.12
5. Inter-modulation distortion: ≤-50dB
6. Useless transmission: In adjacent channel≤-40dB
Out adjacent channel≤-60dB
7. RF output interface: 7/16”
8. Power supply: Single-Phase 220V/50Hz
9. Shape size: 1135mm×675mm×955mm
10.Weight: 136KG

Image performance:
1. Video frequency input level: 1VP-P positive polarity
2. Video frequency input impedance: 75Ω
3. DG: ±5%
4. DP: ±5°
5. Luminance nonlinear: ≤10%
6. Group delay: ≤±60ns
7. Signal-to-clutter ration of low frequency period interference: ≥50dB

Sound performance:
1. Audio input level: 0dBm±6dB
2. Audio input impedance: 10KΩ (imbalance)
                                       600Ω (Balance)
3. Maximum frequency deviation: ±50KHz
4. Harmonic distortion: ≤1%
5. The amplitude frequency characteristics: ±1dB
6. Signal-to -clutter: ≥60dB

PRODUCTS   WORKSHOP :

 1. Safety first, quality first.

 2.  Strict and advanced workshop management system.

 3.  The human production, people-oriented.

 4.  High quality products to provide high quality environment.

Common Problems:

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