The Anritsu MA25200A is a high-power Tx/Rx input protection module engineered to safeguard sensitive RF equipment from damage caused by high-power signals during transmission and reception. Operating across 500 kHz to 1600 MHz, it attenuates RF power levels up to +51 dBm (125 W) to safe measurement levels. The module combines signal generator and RF input ports into a single connection, supporting receiver sensitivity testing and integration with test instruments such as the Anritsu S412E. Insertion loss is consistently flat: 40 dB ± 1 dB across the RF In Port from 500 kHz to 1.6 GHz, and 40 dB ± 1 dB from the Signal Generator Out Port (±1 dB up to 1.0 GHz, ±2.0 dB above 1.0 GHz to 1.6 GHz). This flat response enables accurate amplitude measurements, with loss compensation available through the connected instrument’s amplitude offset menus.
## Technical Specifications
• **Frequency Range:** 500 kHz to 1600 MHz
• **Maximum Input Power:** +51 dBm (125 W) for one minute or until alarm sounds; +44 dBm (25 W) maximum continuous
• **Insertion Loss (RF In Port):** 40 dB ± 1 dB, 500 kHz to 1.6 GHz (typical)
• **Insertion Loss (Signal Generator Out Port):** 40 dB ± 1 dB from 500 kHz to 1.0 GHz; ±2.0 dB from >1.0 GHz to 1.6 GHz (typical)
• **Thermal Management:** Audible alarm at 90 °C nominal; red LED indicator at >100 °C typical; cool down time 2 minutes typical from 90 °C
• **Power Supply:** USB power from connected instrument (cooling fan and alarm)
• **Impedance:** 50 Ω source
• **Connectors:** N(m) coaxial input for signal generator output; N(f) for antenna or transmit/receive ports
• **Dimensions:** 64 mm × 162 mm × 60 mm
• **Weight:** 583 g
## Key Features
• Green LED indicator for Ready status; red LED for thermal alert
• Flat insertion loss response within ±1 dB to 1 GHz enables accurate amplitude measurements
• Handles portable, mobile, and base station transmitter power levels
• Optional padded nylon carrying case (Part No. 760-279-R) available
## Compatibility & Integration
• Safeguards Anritsu S412E ports
• Compatible with LMR Master™ (Land Mobile Radio) instruments
• System-level integration for high-power RF applications
