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.

The 300W transmitter is installed in one 19inch chassis; it’s suitable for medium or small TV station.

Features:

●    The whole machine is single-channel, image with audio together.

●    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：       300W
3. Output impedance：   50Ω
4. Inter-modulation distortion：  ≤-50dB
5. Useless transmission：In adjacent channel ≤-40dB Out adjacent channel ≤-60dB
6. RF output interface： N
7. Power supply：    Single-phase 220V
8.Size: 4U, 19-inch standard
9. Weight：  20KG

Image performance：

1. Video frequency input level：1VP-P positive polarity
2. Video frequency input impedance：75Ωv
3. DG： ±8%
4. DP：  ±7°
5. Luminance nonlinear：    ≤12%

Sound performance: 

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