Boonton 25A RF Power Meter

The Boonton 25A is a precision, solid-state instrument designed as a power meter calibrator. Its primary function is to provide accurate 1 MHz signal levels essential for the calibration of Boonton RF microwattmeters, specifically the Model 41 and 42 series. This calibrator is equipped to verify and adjust both full-scale and down-scale indications on these power meters. The instrument’s accuracy is traceable to the National Bureau of Standards, with specific outputs (0 dBm and -9 dBm) calibrated using thermal transfer techniques, and other ranges verified via precision attenuators.

### Technical Specifications

**General**

* **Model:** 25A
* **Type:** Power Meter Calibrator
* **Manufacturer:** Boonton Electronics Corporation

**Performance Specifications**

* **Output Frequency:** 1 MHz (crystal controlled)
* **Output Impedance:** 50 ohms ±0.5%
* **Power Ranges (Full Scale):** -60, -50, -40, -30, -20, -10, 0, +10, +20 dBm
* **Power Ranges (Down Scale):** 0 to -9 dB in 1 dB steps
* **Output Power Accuracy:** ±0.05 dB (at 25°C ±5°C for 90 days, after 15-minute warm-up)
* **Temperature Influence:** ±0.001 dB/°C (from 0 to 50°C)
* **Harmonic Distortion:** <0.15% total harmonic distortion**Electrical*** **Input Power:** 100, 120, 200, 240 VAC ±10%, 50 to 400 Hz, 7 VA**Physical*** **Dimensions:** 5.2" high (without feet), 8.3" wide, 11.5" deep (132 x 211 x 292 mm) * **Weight:** 7.75 lbs. (3.6 kg)**Environmental*** **Operating Temperature:** 0 to 50°C * **Non-Operating Temperature:** -20 to 75°C**Calibration Traceability*** Factory calibrated using instrumentation traceable to the National Bureau of Standards.### CompatibilityThe Boonton 25A is specifically designed for the calibration of Boonton RF microwattmeters, Models 41 and 42 series.Why Choose Aumictech for Boonton 25A? At Aumictech, we specialize in supplying high-end RF calibration equipment. Whether you need precise power level generation for calibrating sensitive RF microwattmeters, reliable performance verification across a wide dB range, or ensuring the accuracy of your Boonton 41/42 series power meters, our team ensures the Boonton 25A delivers maximum performance for your application.