BIRD 4421A Features and Specifications *

The Bird 4421A Multifunction Power Meter represents a significant advancement in RF measurement technology, offering professionals in the telecommunications, broadcast, aerospace, and defense industries a highly accurate and user-friendly tool for monitoring RF power. As the next-generation successor to the industry-standard Model 4421, the Bird 4421A builds upon the reliability and precision of its predecessor while introducing a range of enhancements that improve usability, expand functionality, and accommodate evolving operational demands. One of the standout features of this RF power meter is its broad sensor compatibility. Designed to seamlessly interface with Bird’s entire line of 402x, 702x, and 703x series power sensors, the device supports automatic sensor detection. This functionality simplifies setup and operation, ensuring efficient sensor integration without the need for manual configuration. Such versatility makes this device ideal for applications that require quick adaptability to different measurement scenarios or sensor types. It has a vibrant 9.7-inch full-color TFT LCD touchscreen display. This high-resolution interface provides an intuitive platform for viewing forward and reflected RF power levels, return loss, and other critical measurements. The display’s clarity, coupled with its user-friendly layout, allows users to navigate settings and access data with minimal training. The touchscreen also enables real-time data visualization, making it easier to identify trends and discrepancies in RF performance.

Measurement accuracy is a hallmark of this model. With precision readings accurate to within 0.5%, this equipment ensures reliable monitoring of forward and reflected power in watts or dBm, along with return loss displayed in VSWR, reflection coefficient, or RL. These metrics are essential for evaluating system efficiency, identifying mismatches, and preventing potential damage caused by high reflected power. The inclusion of dual sensor inputs on select models further extends the unit’s measurement capabilities by allowing simultaneous monitoring of multiple points in the RF chain. The compact and lightweight design of this RF Power Meter enhances its practicality for both laboratory and field use. Measuring 10.6 x 9.7 x 3.6 inches and weighing less than five pounds, the unit is engineered for portability without sacrificing functionality. This makes it an excellent choice for professionals who need to perform RF measurements in varying environments, from bench testing in controlled labs to on-site diagnostics in demanding field conditions. Operational efficiency is also supported by a robust power system. The Model 4421A can be powered by an internal rechargeable battery, delivering up to seven hours of continuous operation on a single charge. This autonomy reduces the need for frequent recharging during extended measurement sessions. A built-in charger enables a full recharge in approximately four hours. For stationary applications, the unit supports AC power input ranging from 100 to 240 VAC at 50/60 Hz, consuming a modest 30 watts of power. Connectivity is another area where the Bird 4421A demonstrates its modern design. Select models feature RS-232 and Ethernet LAN ports, enabling remote monitoring, data logging, and integration into broader networked test systems. These interfaces are especially valuable for users who need to control the unit programmatically or incorporate it into automated test environments. This networking capability reflects the industry's trend toward smarter and more connected measurement tools. From a measurement perspective, the unit’s range is primarily sensor-dependent, allowing users to tailor their setup to the specific frequency and power ranges required by their application. Compatible sensors include the 4021 through 4028 series, as well as the 702x and 703x series, providing broad coverage of RF environments. Depending on the model, the Bird 4421A supports one or two sensor channels, offering flexibility in system design and monitoring needs.

In terms of environmental resilience, this is built to withstand a wide range of conditions. The unit can operate in temperatures from 0 °C to 40 °C and handle up to 95% non-condensing humidity. Its maximum operating altitude is rated at 4,600 meters, and it complies with MIL-PRF-28800F Class 4 standards for shock and vibration. These features ensure that the meter can maintain performance in harsh or mobile environments, making it suitable for military, aerospace, and remote field operations. To further ensure the device’s longevity and consistent performance, Bird provides specific storage guidelines based on temperature and duration. For example, storage up to one month is allowed between -10 °C and 50 °C, while longer-term storage up to six months is permissible at lower temperature ranges. These precautions help maintain battery health and overall reliability during periods of non-use. The product selection guide for the Bird 4421A includes a variety of configurations to meet different application needs. Users can choose between single and dual sensor versions, with options for different interface combinations. This modularity allows for precise alignment with system requirements, whether the use case involves a simple one-channel setup or a more complex dual-sensor system with networked capabilities. Certifications for the Bird 4421A include CE compliance, ensuring conformity with relevant European standards for safety and electromagnetic compatibility. This compliance broadens the meter’s usability in international markets and underscores its manufacturing quality and adherence to global norms. Professionals seeking a reliable, modern RF power measurement solution will find the Bird 4421A to be a robust and versatile option. Its combination of high accuracy, dual-sensor capability, compact design, and flexible connectivity makes it well-suited for both bench-top diagnostics and demanding fieldwork. The enhanced touchscreen interface, sensor compatibility, and network integration reflect a design philosophy rooted in user efficiency and technical excellence.

In summary, the Bird 4421A stands out as a highly capable multifunction power meter that integrates seamlessly into diverse RF testing environments. It continues Bird’s legacy of precision instruments while introducing forward-looking features that meet the expectations of today’s RF professionals. With its ability to deliver precise and actionable data, adaptability to various sensor configurations, and durability in rugged conditions, the Bird 4421A remains a top-tier choice for engineers and technicians who prioritize performance, portability, and ease of use.

The Bird 4421A price and features make it a very attractive option comparing to similar RF power meters available on the market.

Features

• Dual Sensor Support: Select models can accommodate two sensors, enabling simultaneous measurement of multiple RF points.
• Automatic Sensor Detection: Seamlessly integrates with compatible Bird sensors without manual configuration.
• 9.7-Inch Touchscreen Display: A large, full-color LCD interface for intuitive operation and clear data visualization.
• Sensor Compatibility: Works with Bird 402x, 702x, and 703x series sensors.
• Internal Rechargeable Battery: Delivers extended operation time with a built-in charging system.
• Compact and Lightweight Design: Built for portability without compromising functionality.
• Multiple Interfaces (Select Models): Ethernet LAN and RS-232 ports enable network integration and remote control.
• CE and MIL-PRF-28800F Class 4 Certified: Compliant with key safety, environmental, and durability standards.

Benefits

• Versatile Measurement Options: Allows for flexible configuration based on testing needs, whether in lab environments or on-site.
• High Accuracy: Ensures RF power measurements with up to 0.5% precision, reducing uncertainty in data.
• Quick Setup: Auto-detect sensors for faster deployment and less downtime.
• Improved Workflow: Dual-sensor input reduces the need to swap sensors or units during testing.
• Enhanced Usability: Touch interface simplifies menu navigation and settings adjustments.
• Portability for Field Use: Lightweight build and battery power make it ideal for mobile operations.
• Remote Operation Ready: LAN and RS-232 connectivity make integration with automated systems possible.
• Reduced Maintenance Downtime: Built-in charger and rugged design help maintain long-term reliability.

Capabilities

• Forward and Reflected Power Measurement: Displays values in watts or dBm to help evaluate transmission efficiency.
• Return Loss Monitoring: Presents return loss as VSWR, RL (in dB), or Reflection Coefficient to assess system performance.
• Dual-Channel Monitoring: Simultaneously measure two independent RF signals (in applicable models).
• Real-Time Data Display: Offers immediate visual feedback of measurement changes on the touchscreen.
• Sensor-Based Frequency and Power Range: The operational range is determined by the attached sensor, providing adaptability to various RF applications.
• Field-Ready Durability: Designed to perform reliably in harsh environments, including high humidity and altitude conditions.

Specifications

• Display: 9.7-inch full-color TFT LCD touchscreen
• Power Input: 100–240 VAC, 50/60 Hz, 30 W
• Battery: Internal rechargeable battery, up to 7 hours of use; ~4 hours to recharge
• Sensor Compatibility:
  • 4021–4028 Series
  • 702x and 703x Series
• Sensor Channels: 1 or 2, model-dependent
• Return Loss Range: 0 to 40 dB
• VSWR Range: 1.0 to 199.9
• Interfaces (model dependent): RS-232, Ethernet LAN
• Physical Dimensions: 10.6 in x 9.7 in x 3.6 in (269 mm x 246 mm x 91 mm)
• Weight: Less than 5 lbs
• Environmental Ratings:
  • Operating Temperature: 0 °C to 40 °C
  • Humidity: Up to 95% non-condensing
  • Altitude: Up to 4,600 meters
• Certifications:
  • CE compliant
  • MIL-PRF-28800F Class 4 (shock and vibration)

BASIC INFORMATION

CHARACTERISTICS

* BIRD 4421A technical specifications is provided for reference only. Avionteq cannot ensure accuracy of the technical specifications presented herein. The technical data may not relate entirely to all model and versions of the 4421A such as the models sold by Avionteq.

Buy, sell, trade-in or rent BIRD 4421A NAV/COMM Test Set.

Avionteq offers both new and refurbished or used BIRD 4421A Multifunction Power Meter for sale or rent at most competitive price. All refurbished equipment are thoroughly tested and come with our warranty and fresh calibration certificate (when required). You can also sell your excess / surplus BIRD 4421A or receive trade-in credit towards purchase of other test equipment.