300W TV Transmitter
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.
● 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.
1. Working frequency： VHF/UHF Channel arbitrary choice
2. Output power： 300W
3. Output impedance： 50Ω
4. Inter-modulation distortion： ≤-50dB
5. Useless transmission： In adjacent channel ≤-40dB
adjacent channel ≤-60dB
6. RF output interface： N
7. Power supply： Single-phase 220V
8. Shape size：
1. Video frequency input level： 1VP-P positive polarity
2. Video frequency input impedance： 75Ω
3. DG： ±8%
4. DP： ±7°
5. Luminance nonlinear： ≤12%
1. Audio input level： 0dBm±6dB
2. Audio input impedance： 10KΩ (imbalance)
3. Maximum frequency deviation： ±50KHz
4. Harmonic distortion： ≤1%