Product Overview: High-Performance 2W RF Power Amplifier for DVB-T Modulator Applications

The 2W RF Power Amplifier represents a specialized, high-fidelity solution engineered explicitly for enhancing the broadcast capabilities of HDMI to DVB-T modulators. In the realm of digital television transmission, the integrity of the RF signal is paramount. This amplifier serves as a critical link in the broadcast chain, taking the relatively low-power output from a standard modulator and boosting it to a robust 2W (33 dBm) or higher, enabling stable, reliable, and extended coverage for a wide array of professional and project-based applications.

Designed with a core focus on maintaining the stringent signal quality required by the DVB-T (Digital Video Broadcasting - Terrestrial) COFDM (Coded Orthogonal Frequency Division Multiplexing) standard, this module is more than just a power booster. It is a precision instrument that ensures the amplified signal remains clean, linear, and free from the distortions that can degrade picture quality and cause signal drop-outs. With a standard operating band centered at 530 MHz and a suite of customization options, this amplifier offers unparalleled flexibility for system integrators, broadcast engineers, and R&D professionals seeking a reliable and adaptable RF power solution.

Its compact, ruggedized form factor belies its significant performance, incorporating advanced semiconductor technology and optimized circuit design to deliver high gain, excellent linearity, and low group delay in a cost-effective package. Whether deploying a small-scale digital TV distribution system in a hotel or conducting rigorous laboratory tests, this amplifier provides the necessary power and performance to ensure transmission success.

Key Features & Technological Advantages

1. Robust Output Power and Linearity:

• Output Power: Guarantees a minimum of 2W (33 dBm) saturated output power, with a 1dB compression point (P1dB) typically at 10W, ensuring operation in the linear region for clean amplification.

• High Linearity: Exceptional third-order intercept point (IP3) performance results in IMD3 ≤ -35 dBc @ 2W output, critically minimizing intermodulation distortion that can create interfering adjacent channels and degrade the Modulation Error Ratio (MER).

2. Superior Signal Integrity and Gain Profile:

• High Gain: Provides a substantial 43 ±1 dB of fixed gain, eliminating the need for additional driver stages and simplifying system design.

• Exceptional Flatness: Exhibits a very low gain ripple of ≤ 1.0 dB across the entire 8 MHz DVB-T channel bandwidth. This flat frequency response is crucial for maintaining uniform performance across all COFDM carriers.

• Minimal Group Delay: A group delay of < 1 microsecond ensures that all frequency components within the channel experience nearly identical time delays, preserving the complex structure of the COFDM signal and preventing symbol errors.

3. Operational Flexibility and Efficiency:

• Wide Operating Voltage: Supports a flexible DC power input range from +12V to +17V, compatible with standard AC adapters and rack-mounted power supplies.

• Low Power Consumption: Efficient design draws a maximum of ≤ 1.2A current, minimizing heat generation and operational costs.

4. Durable and Practical Design:

• Compact and Lightweight: With dimensions of just 81mm x 48mm x 14mm and a weight of approximately 89 grams, the module is ideal for space-constrained applications and can be easily integrated into existing equipment.

• Extended Temperature Range: Engineered for reliable operation across a wide temperature spectrum from -20°C to +70°C, ensuring performance stability in challenging environmental conditions.

• Professional Connectivity: Features standard SMA-75KFD RF connectors with a 75Ω characteristic impedance, ensuring a perfect match with common DVB-T modulator outputs and coaxial cabling to minimize VSWR reflections.

Detailed Technical Specifications

Comprehensive Applications

This 2W RF Power Amplifier is designed to serve a diverse range of applications where reliable DVB-T signal generation and distribution are required:

• Professional TV Broadcast Systems: Integration with HDMI to DVB-T modulators to create low-power transmit stations for community TV, campus-wide broadcasting, or localized information channels.

• Institutional TV Distribution: Ideal for distributing digital TV signals over coaxial networks in hotels, hospitals, schools, universities, corporate centers, and apartment complexes. It allows a single modulator to feed dozens or hundreds of TVs.

• RF Laboratory Testing and R&D: A vital component for engineers developing and testing DVB-T receivers, set-top boxes, or modulator equipment. Its stable output provides a known-good, amplified signal for performance validation and stress testing.

• Wireless Video Transmission Systems: Used in systems that require wireless transmission of HDMI content over distances, such as for live events, surveillance, or portable presentation setups operating in the UHF band.

• Signal Coverage Extension: Acts as a "fill-in" amplifier to boost a signal to cover dead zones in larger buildings or complexes within a custom DVB-T project.

• Educational and Demonstration Setups: Perfect for teaching the principles of digital television broadcasting, COFDM modulation, and RF power amplification in an academic setting.

Options & Customization Services

We recognize that a one-size-fits-all approach is insufficient for advanced RF applications. Therefore, we offer extensive customization options through our OEM/ODM services to tailor the amplifier to your exact system requirements.

• Custom Frequency Range: While standard at 530 MHz, the amplifier can be engineered to operate at other frequency bands within the UHF spectrum (e.g., 470-860 MHz) or other specific center frequencies upon request, suitable for different regional DVB-T/T2 channels.

• Custom Output Power: The output power level can be scaled to meet your specific needs. We can design variants with higher power (e.g., 5W, 10W, 20W) for greater coverage or lower power for specific low-noise applications.

• Connector Type and Impedance: While 75Ω is standard for DVB-T, we can customize the design for 50Ω systems. Connector types can be changed to N-type, BNC, or F-type based on your cabling and infrastructure.

• Gain Control: Options for fixed, variable, or remotely controlled gain can be implemented to provide dynamic control over the output power level.

• Mechanical and Thermal Design: Custom heatsinking, enclosure design, and mounting options (e.g., rack-mount chassis integrating multiple amplifiers) are available for seamless integration into your platform.

• Filtering: Integrated band-pass or low-pass filters can be added to enhance spectral purity and meet specific spurious emission requirements.

Custom Power Amplifier Specification Request Form

To initiate a custom design or confirm the suitability of a standard unit for your application, please provide the following details. The more information you can supply, the more accurately we can engineer a solution that meets your performance and compliance targets.

1. Output Power Requirements

• Nominal Average Output Power: _______ W or _______ dBm

• Required Gain (or adjustable range): _______ dB

• Gain Flatness over channel: _______ dB

• Linearity Specification (e.g., IMD3 ≤ _______ dBc @ _______ W, or NPR _______ dB)

2. Frequency and Bandwidth

• Center Frequency of Operation: _______ MHz

• Operating Bandwidth (Total): _______ MHz

• Channel Bandwidth: _______ MHz (e.g., 6, 7, 8 MHz)

• Frequency Response Flatness: _______ dB over channel / _______ dB over full band

• Harmonic and Spurious Emission Requirements: _______ dBc (e.g., -60 dBc)

3. Input / Output Interface

• Input Connector Type and Impedance: ________________ (e.g., SMA-F, 75Ω)

• Nominal Input Power Level: _______ dBm

• Output Connector Type and Impedance: ________________ (e.g., N-F, 50Ω)

• Maximum Allowable Output VSWR (for stable operation): _______:1

4. Modulation and System Performance

• Modulation Type: (e.g., DVB-T/T2 16-QAM, 64-QAM, 256-QAM)

• Required MER (Modulation Error Ratio) at rated output: _______ dB

• Required Phase Noise at 10 kHz / 100 kHz offset: _______ dBc/Hz

• Duty Cycle: Continuous (100%) or Intermittent (_______ %)

5. Power Supply and Control

• Supply Voltage and Max Available Current: _______ V DC / _______ A

• Is Remote On/Off (TTL) required? Yes / No

• Is Analog or Digital Gain Control required? Yes / No. If yes, specify interface.

6. Thermal and Environmental

• Operating Temperature Range: _______ °C to _______ °C

• Preferred Cooling Method: Natural Conduction / Forced Air

• Environmental Sealing (IP Rating): IP _______ (e.g., IP20, IP67)

• Operating Altitude: _______ meters

7. Dimensions and Installation

• Preferred Mounting Type: PCB Module / Desktop Enclosure / Rack Chassis

• Critical Dimensional Constraints: _______ mm (Length) x _______ mm (Width) x _______ mm (Height)

8. Compliance and Testing

• Required Regulatory Standards or Certifications: (e.g., CE, FCC Part 74/15, ETSI EN 300 744)

• Any other critical performance specifications not listed above: ________________________________

Important Note for DVB-T Applications:
Digital television signals, particularly multi-carrier systems like DVB-T COFDM, are extremely sensitive to amplifier non-linearities and phase distortions. Parameters such as IMD3, Group Delay, and Gain Flatness have a direct and critical impact on the resulting Modulation Error Ratio (MER) and Bit Error Rate (BER), which ultimately define the picture quality and coverage reliability. Providing detailed modulation and linearity requirements is essential for us to guarantee system-level performance.