The CMA-100 Countermeasure Audio Amplifier is useful to detect eavesdropping devices and hostile microphones or to test for hook switch audio leakage in order to keep your private information and conversations safe.
The CMA-100 has a 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.
Additionally, the CMA-100 utilizes a 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.
|Input Impedance||50k Balanced|
|Broadband microwave probe|
|Frequency Response||25 Hz to 44Khz|
|Battery||9V alkaline ( 5 - 30 Hrs typical run time )|
|Band Pass Filter||320Hz to 3.2kHz|
|Bias Control||( over current protected, input impedance is reduced to 3.6k ohms when bias is active )|
|Common Mode Rejection||>75dB|
|Digital Voltmeter||3.5 Digit, auto zero, auto polarity, +/-199.9V AC/DC|
|Headphone Gain Control||0 to 15 dB|
|High Pass Filter||320Hz to 44kHz|
|Leakage Resistance to Case||>10M|
|LED||Power On/Low Battery ( LED off @ 6.0V )|
|Line-Out Audio Output||600|
|Low Pass Filter||25Hz to 3.2kHz|
|Manual Gain Control||0, 25, 50, 75, 100 dB|
|Maximum Input voltage||250V AC/DC|
|Maximum System Gain||115 dB manual mode, 120 dB in Auto Mode|
|Maximum Usable Input||31V p-p|
|Preamp Auto attenuator||( with overload warning LED )|