Description
Description

Countermeasures Amplifier CMA-100 for detection of surveillance devices, which are wired in a building

CMA-100 - countermeasures amplifier is a counter surveillance tool for detection of electronic devices, which are attached to the wiring of the building.

The contermeasures amplifier detects among others LAN and server systems, telephone wiring, AC power, and alarm wire. The device is equipped with sophisticated automatic gain control circuit function, which makes it unique in comparison to other devices of this type.

The device is extremely efficient. There are minimal distortions while monitoring large signals. Moreover, adjustable bias voltage is able activate devices that are voltage or sensitive to current.

The CMA-100 countermeasures amplifier is also equipped with AC/DC digital voltmeter, select-able audio filters, and a wide dynamic range.

The advantages of the Countermeasures Amplifier CMA-100 for detection of surveillance devices, which are wired in a building :

  • Independence of the balanced input of 50K ohm, can withstand being attached to live power lines with voltages up to 250V, and provides up to 115dB of gain;
  • Automatic Gain Control AGC that has 105 dB of control;
  • Signals as large as 31V peak-peak can still be monitored with minimal distortions;
  • Manual gain control may be set to 0, 25, 50, 75, or 100 dB;
  • Positioning of filters to FLAT, LOW PASS, HIGH PASS, or BAND PASS.
Specification
Specification
Specification of the CMA-100 Countermeasures Amplifier for detection of surveillance devices
Input impedance:
  • 50k balanced
  • Common mode rejection: >75dB
  • Maximum usable input: 31V p-p
  • Preamp auto attenuator: 0 to -40 dB (with overload warning LED)
Bias control:
  • 0 to +/-14.5V DC, 5mA max (over current protected, input impedance is reduced to 3.6k ohms when bias is active)
Maximum input voltage
  • 250V AC/DC
  • Leakage resistance to case: >10M
Automatic Gain Control
  • Manual gain control: 0, 25, 50, 75, 100 dB
  • Headphone gain control: 0 to 15 dB
  • Maximum system gain: 115 dB manual mode, 120 dB in Auto Mode
Digital voltmeter
  • 3.5 Digit, auto zero, auto polarity, +/-199.9V AC/DC
Frequency response
  • No filtering: 25 Hz to 44Khz
  • High pass filter: 320Hz to 44kHz
  • Low pass filter: 25Hz to 3.2kHz
  • Band pass filter: 320Hz to 3.2kHz
Audio
  • Headphone audio output
  • Line-out audio output: 600
Power
  • Power on/low battery LED (LED off @ 6.0V)
  • Battery: 9V Alkaline (5 - 30 hours typical run time)
Mechanical
  • Unit dimensions: 7.3"(184.4 mm) x 2.75"(69.8 mm) x 1.75"(44.5 mm)
  • Unit weight: 12.1 oz (343 g)
Brand
Brand
Research Electronics International (REI)
Research Electronics International (REI) was founded in 1983 in Cookeville, Tennessee USA. REI's customers include government agencies, law enforcement agencies, security companies and professionals involved in surveillance security and protection of confidential information. REI engineers are focused on designing compact products with superior performance and usability. New products are based on the experience of professional teams. The wide range of devices includes equipment such as surveillance device detectors, jammers, high-end cameras and electromagnetic spectrum analyzers.
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  • CMA-100 Countermeasures Amplifier
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