300W Digital TV Transmitter (DVB-T2/ATSC/ISDB-T)

• Customization: Available
• Type: Transmitter
• Function: Signal Transmitting Device, Signal Transmission Equipment, Signal Monitoring Equipment
• Certification: CE, ISO, GS
• Condition: New
• Frequency: UHF/VHF
• Output Power: 300W
• Output Interface: 7/16"
• Size: 132mm*483mm*550mm
• Weight: 65kg
• Channel Bandwidth: 8MHz
• Transport Package: Export Wooden Box
• Specification: Professional
• Trademark: ZHC
• Origin: Hangzhou
• HS Code: 8525500000
• Production Capacity: 100PCS/Month

Product Description

50W~300W Digital TV Transmitter

Overview
This digital TV transmitter consists of a 50W~300W power amplifier and various standard terrestrial digital TV exciters (national standard DTMB, ISDB-T, DVB-T2, etc.) to form various standard terrestrial digital TV transmitters.
The power amplifier unit adopts the industry's advanced power transistor (AMPLON company's LDMOS transistor) as the power amplifier component, equipped with a hot-plugin structure and a highly reliable power amplifier power supply with redundancy exceeding 100%; And there is a built-in switch for the main and backup actuators, which can achieve automatic or manual switching of the main and backup actuators.
This product adopts a 4-core microprocessor combined control system to ensure excellent performance and stable operation. Adopting a silky graphical interface, allowing users to operate the transmitter like a mobile phone, basically achieving the design concept of operating this product without reading the "User Manual".



Features:
Built-in exciter automatic switch, can be equipped with dual exciters for automatic switching
All solid-state digital TV power amplifier using high linearity LDMOS transistor
Whole machine pre distortion correction, high overall efficiency
Equipped with a built-in timer for timing on/off, which can achieve automatic timing on/off
Set the emergency switch button, which can be turned on and off with one click
Visualized human-machine interface, operating the transmitter like a mobile phone
The 4.3 inch color touch screen displays the main parameters and operating status of the power amplifier, main and backup exciters, and single frequency network timer (optional), and various parameters can be set through the screen
Adopting hot-plugin power amplifier for easy maintenance and repair
Multiple alarm and protection functions (overvoltage, overcurrent, overheating, overpower, high standing wave ratio, etc.)
Networked telemetry and remote control, monitoring can be achieved through web pages
High reliability design, capable of working continuously for 24 hours

Diagram:


Technical Specifications:
1. Working channel: VHF or UHF
2. Output power: 50W/100W/200W/300W, four power levels available
3. Channel bandwidth: 8MHz or 6MHz
4. Output impedance: 50 Ω
5. Output interface: L29/L27 (or other user specified interface)
6. Main and backup exciter interface: L16 or SMA
7. Switching mode of main and backup actuators: manual/automatic/remote control
8. Communication interface between main and backup exciters and timer: RS232
9. Output load reflection loss: Normal operation: -32dB
Permissible working: -20dB
10. Power input level: -5dBm~0dBm
11. Out of band useless emission: ≤ 60dB
12. In band fluctuation: ± 0.5dB
13. Shoulder: better than 36dB
14. MER: better than 30dB
15. Power supply voltage: AC 220V/50Hz
16. Operating environment temperature: -10 ºC~45 ºC
17. Relative humidity: < 95%
18. Altitude: < 5500m
19. Overall size: 132mm (high) × 483mm (wide) × 550mm (deep)
20. Weight: 65KG

All other indicators meet GB/T28435-2012 "Technical Requirements and Measurement Methods for Ground Digital Television Broadcasting Transmitters"


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