REI CMA-100 Countermeasures Amplifier

CMA-100 Countermeasures Amplifier is a high gain audio amplifier used to detect and identify certain types of surveillance devices attached to building wiring such as telephone wiring, LAN and server systems, AC power, and alarm wire. The CMA-100 Countermeasures Amplifier functions employ a sophisticated automatic gain control circuit that is superior to most audio amplifiers.

Efficiency: large signals can be monitored with minimal distortions and adjustable bias voltage can activate devices that are voltage or current sensitive

Usability: balanced input impedance can withstand being attached to live power lines with voltages up to 250V

Portability: contains a built-in AC/DC digital voltmeter, select-able audio filters, and a wide dynamic range

Features & Benefits

• Balanced input impedance of 50K ohm, can withstand being attached to live power lines with voltages up to 250V, and provides up to 115dB of gain
• Unique AGC that has 105 dB of control
• Signals as large as 31V peak-peak can still be monitored with minimal distortions
• Manual gain control can be set to 0, 25, 50, 75, or 100 dB
• Filters can be positioned to FLAT, LOW PASS, HIGH PASS, or BAND PASS.