Bird 4421-101 RF Directional Power Meter Mainframe

The Bird 4421-101 is a component of a comprehensive RF power measurement system, specifically a multifunction precision power meter designed for accurate RF power analysis. This instrument is engineered to operate with various Bird RF power sensors, which determine the specific frequency and power ranges available for measurement. It is suitable for a wide array of high-power RF applications, including telecommunications, broadcasting, and RF system testing, providing precise measurements of both forward and reflected power. The Bird 4421-101 offers versatile functionalities for detailed RF signal analysis.

### Technical Specifications

* **Manufacturer:** Bird Technologies
* **Model:** 4421-101
* **Product Type:** Multifunction Precision Power Meter
* **Power Range:** 100 mW to 10 kW Full Scale (FS), sensor dependent. Some sources indicate a range of 100W to 10kW.
* **Frequency Range:** Sensor dependent, with some sensors supporting up to 1 GHz. The Bird 4421 itself operates effectively up to 32 MHz.
* **VSWR Range:** 1.0 – 199.9
* **Return Loss Display:** 0 to 40 dB
* **Accuracy:** ±1% of reading or better for certain sensors at calibration frequencies. Another source specifies ±2%. Display accuracy is ±1 on the least significant digit.
* **Functions:**
* Forward and reflected power (in Watts or dBm)
* VSWR
* Return loss (in dB)
* Minimum and maximum values of any parameter
* **Overrange Indication:** Audible warning when RF power input exceeds 120% of the sensor’s maximum power range.
* **Display:** 3½ digit liquid crystal display (LCD) with annunciators for mode, measurement units, battery condition, programming status, and trend arrows. Includes a switchable backlight.
* **Operating Power:** 115/230 VAC, 50/60 Hz.
* **Battery Operation:**
* Supports 8 C-size nickel-cadmium 1.2V cells (NEDA Type 10014).
* Supports 8 C-size alkaline-manganese dioxide 1.5V cells (NEDA Type 14A).
* Minimum 8 hours continuous use with batteries.
* Built-in battery charger. Drained batteries require approximately 28 hours to recharge.

### Electrical

* **AC Power Input:** 115/230 VAC, 50/60 Hz
* **Fuses:**
* Outside on AC line: 3 AG, 1/4 ampere, 250 volt
* Inside on Power Module: 3 AG, 1 ampere, 250 volt
* IEC (5 x 20 mm) Type T: 115 Vac – 0.25 A, 230 Vac – 0.125 A

### Interfaces

* **Optional Interfaces:**
* IEEE-488 (GPIB) (Part No: 4421-488)
* RS-232 Serial Interface (Part No: 4421-232)
* Logic Levels for IEEE-488: Meets all IEEE Standard 488-1978
* Logic Levels for RS-232: Meets all EIA Standard RS-232-C specifications

### Physical

* **Dimensions:**
* 12 9/32″ L x 12 5/32″ W x 4 1/4″ H (312 mm x 309 mm x 108 mm) with handle extended 15 7/16″ L (392 mm)
* 15.5”L x 12.25”W x 4.25”H (393 x 311 x 108 mm)
* 6.5”L x 4.5” W (165.1 x 114.3 mm) for interface modules
* **Weight:** 11 lbs. (5 kg). Approximately 9.5 lbs. (4.3 kg) nominal.
* **Construction:** Rugged and durable materials designed to withstand laboratory and field conditions.

### Environmental

* **Temperature Range:**
* Operating: 0 to 50 °C (32 to 122 °F)
* Storage: –20 to +50 °C (–4 to +122 °F)
* **Humidity:** 95% ± 5% maximum (non-condensing)
* **Altitude:** Up to 10,000 feet (3,048 m)

### Compatibility

* **Power Sensors:** The Bird 4421 RF Power Meter is designed to be used with Bird RF power sensors, such as the Bird 4021, 4027A, 4027F, and 4028 series. The sensor selection is critical as it dictates the overall frequency and power measurement capabilities of the system.
* **Connectors:** Standard connectors often include N-type. Other available connector types include Male or Female BNC, TNC, UHF, C, SC, LC, N, HN, LT, General Radio Type 874, and EIA Flanged.
* **Load VSWR:** Do not use the power sensor with a load VSWR greater than 2:1 to prevent damage.

Why Choose Aumictech for Bird 4421-101?
At Aumictech, we specialize in supplying high-end RF test and measurement equipment. Whether you need precise RF power measurement, reliable signal control, or comprehensive RF system analysis, our team ensures the Bird 4421-101 delivers maximum performance for your application.