Introduction: This product is an all-solid-state single-channel TV transmitter with professional-grade TV exciter, which can be switched between single and dual exciter configurations. The machine has a variety of linear, non-linear pre-correction functions, carrier frequency offset, precision bias (with external high-precision reference source), prefabricated and controllable half-power output, and has a remote telemetry interface. The power amplifier adopts imported LDMOS FET, the module is compatible, and the high-quality switching power supply is used for parallel power supply. Both the power amplifier and the power supply are hot-swappable. The one-time synthesized power synthesizer has a small loss of standing wave. The working parameters of the power amplifier component are displayed in real time, and the whole machine has protection functions such as overcurrent, overtemperature, overpower, and standing wave ratio. The main control touch screen displays the working parameters of the whole machine and power amplifier components in real time. The 3KW machine is installed in a 19-inch chassis and is suitable for TV stations at all levels. Features: 1. The whole machine is single channel, and the image is connected with sound. 2. Backup redundancy design, can achieve zero off-air rate. 3. Excitation redundancy design of the exciter: The main exciter and the standby exciter are mutually backup and automatically switched. (The exciter is optional.) When the main exciter fails, it automatically switches to the alternate exciter without interruption. 4. Power amplifier backup redundancy design: multiple power amplifier synthesis; power amplifier modules have high consistency, can be used for backup, and can be replaced. 5. Backup redundancy design of power supply: Multiple switching power supplies are connected in parallel to supply power. The microcomputer monitors the working state of the power supply and adaptively adjusts the working state of the power supply. 6. This machine realizes the intelligent network management and monitoring, and has an external PC interface. 7. Equipped with technical data detection, monitoring system and fully functional computer control software with self-diagnosis function. Various technical parameters can be read through the LCD panel of the panel. 8. Perfect protection measures to reduce equipment damage This machine is equipped with no video protection, excessive standing wave ratio, overheating, over-excitation, phase loss protection and lightning protection measures. The switching power supply is provided with protection measures such as overvoltage, overcurrent, undervoltage, overtemperature, short circuit, and lightning protection. 9. All power supplies are switching power supplies; high efficiency, good voltage regulation range, and strong adaptability to external power changes. 10. Adopt modular design concept. 11. Hot-swap design: The power amplifier module and switching power supply support hot swap, convenient debugging and maintenance, and improve reliability. 12. Built-in fan design makes the transmitter compact and beautiful. Technical Parameters: Machine 1. Operating frequency band: VHF/UHF 2. Output power: 3KW 3. Output impedance: 50Ω 4. Output load impedance standing wave ratio: ≤1.12 5. Intermodulation distortion: ≤-50dB 6. Unwanted transmission: ≤-40dB in adjacent channels ≤-60dB outside the adjacent channel 7. RF output interface: Φ40 8. Power: Three-phase 380V 9. Dimensions: (height) 1840mm × 580mm (width) × 1150mm (deep) (3KW machine) 10. Weight: 380KG image: 1. Video input level: 1VP-P positive polarity 2. Video input impedance: 75Ω 3. DG: ±5% 4. DP: ±5° 5. Brightness nonlinearity: ≤10% 6. Group delay: ≤±60ns 7. Low frequency period interference signal to noise ratio: ≥50dB audio 1. Audio input level: 0dBm±6dB 2. Audio input impedance: 10KΩ (unbalanced) 600Ω (balanced) 3. Maximum frequency offset: ±50KHz 4. Harmonic distortion: ≤1% 5. Amplitude frequency characteristics: ±1dB 6. Signal to noise ratio: ≥60dB
Introduction: This product is an all-solid-state single-channel TV transmitter with professional-grade TV exciter, which can be switched between single and dual exciter configurations. The machine has a variety of linear, non-linear pre-correction functions, carrier frequency offset, precision bias (with external high-precision reference source), prefabricated and controllable half-power output, and has a remote telemetry interface. The power amplifier adopts imported LDMOS FET, the module is compatible, and the high-quality switching power supply is used for parallel power supply. Both the power amplifier and the power supply are hot-swappable. The one-time synthesized power synthesizer has a small loss of standing wave. The working parameters of the power amplifier component are displayed in real time, and the whole machine has protection functions such as overcurrent, overtemperature, overpower, and standing wave ratio. The main control touch screen displays the working parameters of the whole machine and power amplifier components in real time. The 3KW machine is installed in a 19-inch chassis and is suitable for TV stations at all levels.
