CMA 100 Countermeasures Audio Amplifier

High Gain Audio 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



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Features

  • 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.

Applications

  • Technical Surveillance Countermeasures (TSCM)
  • Counter Surveillance
  • Audio Amplification
  • Wiring Testing
  • Eavesdropping Detection
  • Intelligence Protection
  • Executive Protection
  • Surveillance Equipment Detection
  • Electronic Surveillance Detection

Specifications

INPUT IMPEDANCE

50k Ω 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 Ω

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 Ω

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)

 

Accessories

There are currently no accessories associated with this product.
ANG 2200 Acoustic Noise Generator

Protect Private Conversations

The ANG-2200 Acoustic Noise Generator creates a perimeter of noise that defeats acoustic leakage eavesdropping devices including wired microphones inside walls, contact microphones, audio transmitters located in AC outlets, and laser/microwave reflections from windows.

Efficiency: offers two channels, each with high and low frequency control to compensate for material composition, with truly random noise sources

Usability: masking system injects noise into the environment perimeter and not directly into the environment—allowing normal conversation while defeating eavesdropping devices

Portability: optional accessories (transducer, omnidirectional speaker, window mounts) can be purchased to tailor the ANG-2200 to the environment of concern



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Features

  • Two separate channels
  • Truly random noise sources
  • High and low frequency controls
  • Overload protection

Applications

  • Technical Surveillance Countermeasures (TSCM)
  • Counter Surveillance
  • Audio Masking
  • Noise Generation
  • Eavesdropping Prevention
  • Intelligence Protection
  • Executive Protection

Specifications

CHANNEL

Independent random noise source
Output voltage: 10 Vp-p @ 6 Ω (2 Ω min load)
Frequency range: 125 Hz to 4 kHz
Equalizer: LF 180 Hz ± 12 dB, HF 3 kHz ± 12 dB

POWER

12 VDC @ 1 A (AC adaptor supplied for 120 or 240 VAC)

MECHANICAL

Unit dimensions: 1.6 x 5.5 x 8 in  (4.1 x 14.0 x 20.3 cm)
Unit weight:  1.2 lb. (.5 Kg)

Accessories

There are currently no accessories associated with this product.