The CMA-100 Countermeasures Amplifier, a high-gain audio amplifier, is designed to discover and pinpoint specific kinds of hidden surveillance equipment connected to building infrastructure, such as those connected to telephone lines, local area networks (LAN), server systems, alternating current power, and alarm wiring.

One of the standout features of CMA-100 is its sophisticated automatic gain control circuit. This feature allows it to surpass many other audio amplifiers, providing you with more reliable and accurate results. It's capable of processing large signals while minimizing distortions, ensuring the clarity of your findings. 

The CMA-100 also features an adjustable bias voltage. This allows the CMA-100 to interact with and activate devices that respond to specific voltage or current levels, expanding the range of surveillance devices it can detect.

With its balanced input impedance, it can withstand being attached to live power lines with voltages up to 250V. Also, if there is video content on the wiring, the video synchronization pulses can be heard and identified through the CMA-100.

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CMA-100 Main Features:

• Advanced high gain audio amplifier with automatic gain control circuit
• Identifies and locates surveillance equipment connected to building infrastructure
• Handles large signals with minimal distortions
• Adjustable bias voltage can activate devices that are sensitive to specific voltage or current levels
• Balanced input impedance allows connection to live power lines up to 250V
• Portable design with built-in AC/DC digital voltmeter
• Offers selectable audio filters and a wide dynamic range
• Optional Acoustic Leakage Probe ALA-100 - for evaulating structure bond acoustic leakage

CMA-100 Specifications: 

INPUT IMPEDANCE
50k Ω balanced
Common mode rejection: >75dB
Maximum usable input: 31 Vp-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 - 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 - 44Khz
High pass filter: 320Hz - 44kHz
Low pass filter: 25Hz - 3.2kHz
Band pass filter: 320Hz - 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 in x 2.75 in x 1.75 in (185.4 mm x 69.8 mm x 44.5 mm)
Unit weight: 12.1 oz (343 g)

ACOUSTIC LEAKAGE PROBE ALA-100 (Optional) - Evaluates structure bound acoustic leakage (walls, windows, etc.)
Frequency Response:
50Hz - 10kHz 
(surface dependant)
Impedance: 47K Ohm

CMA-100 Countermeasures Amplifier Feature Focus: 

Advanced Automatic Gain Control Circuit

Detection and Identification of Surveillance Devices

The CMA-100 is designed to detect and identify a wide range of surveillance devices that could be hidden within a building's infrastructure. This includes devices connected to telephone lines, LAN and server systems, AC power, alarm wire, and even leftover wiring that is no longer in use. Its comprehensive detection capabilities make it an all-in-one solution for surveillance detection, providing peace of mind that your environment is secure from various potential surveillance threats.

Handles of Large Signals with Minimal Distortions

One of the standout features of the CMA-100 is its ability to handle large signals while minimal distortions. This is particularly important when dealing with strong signals from surveillance devices. Despite the strength of these signals, the CMA-100 ensures that the output remains clear and accurate, providing reliable results.

Adjustable Bias Voltage

The CMA-100 features an adjustable bias voltage, allowing it to interact with and activate devices that respond to specific voltage or current levels. This increases the range of surveillance devices that the CMA-100 can detect and identify, making it a versatile tool in surveillance detection and countermeasures. Whether a device is voltage or current sensitive, the CMA-100 can adjust accordingly to ensure detection.

Balanced Input Impedance

The CMA-100 is designed with balanced input impedance, allowing it to be connected to live power lines with voltages up to 250V. This feature ensures that the device remains durable in various environments and conditions, providing reliable performance even when connected to high-voltage power lines.

Portability and Built-in AC/DC Digital Voltmeter

Despite its advanced features, the CMA-100 is designed with user convenience in mind. It is portable, making it easy to transport and use in various locations. Additionally, it comes with a built-in AC/DC digital voltmeter, providing a convenient way to measure voltage levels without the need for additional equipment.

Selectable Audio Filters and Wide Dynamic Range

The CMA-100 offers selectable audio filters and a wide dynamic range, allowing you to customize its operation to suit your specific needs. Whether you need to filter out certain frequencies or adjust the device to handle a wide range of signal strengths, the CMA-100 provides the flexibility to do that. This ensures more precise and tailored detection results, enhancing the effectiveness of your surveillance detection.

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CMA-100 Countermeasures Amplifier FAQs

What is the primary purpose of the CMA-100 Countermeasures Amplifier?
The CMA-100 Countermeasures Amplifier is designed to detect and identify hidden surveillance devices connected to building infrastructure. This includes devices connected to telephone lines, local area networks (LAN), server systems, AC power lines, and alarm wiring.

What makes the CMA-100 different from other audio amplifiers?
Its advanced automatic gain control circuit allows it to handle large signals with minimal distortions and maintain consistent output levels. This ensures accurate results while detecting surveillance devices in challenging conditions.

How does the adjustable bias voltage feature help with surveillance detection?
The adjustable bias voltage can interact with devices that respond to specific voltage or current levels, enabling the CMA-100 to activate and identify voltage-sensitive surveillance equipment for a broader detection range.

Can the CMA-100 be safely connected to live power lines?
Yes, the CMA-100's balanced input impedance allows it to be safely connected to live power lines with voltages up to 250V AC/DC, making it capable of identifying surveillance devices in high-voltage environments.

What filters are available on the CMA-100?
It offers selectable audio filters, including high-pass, low-pass, and band-pass filters, allowing you to refine frequency ranges for more precise detection results.

How does the built-in digital voltmeter contribute to the CMA-100's functionality?
The integrated AC/DC digital voltmeter provides quick voltage level readings, making it easier to measure signals without additional equipment.

Is the CMA-100 portable?
Yes, the CMA-100 is lightweight and compact, making it easy to carry to various locations for comprehensive surveillance detection.

How does the optional Acoustic Leakage Probe ALA-100 improve detection?
The ALA-100 helps evaluate acoustic leakage through structures like walls and windows, offering an additional layer of surveillance detection by identifying structure-borne audio signals.

How does the CMA-100's automatic gain control (AGC) circuit function?
The AGC circuit automatically adjusts the gain to maintain a consistent audio output level, ensuring reliable results even when input signal strength varies significantly.

What kind of audio outputs does the CMA-100 provide?
It provides both headphone and line-out audio outputs for direct monitoring and external recording of detected signals.

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Note:

For more detailed specifications, please carefully study the PDFs available for download below.
CMA-100 Countermeasures Amplifier User Manual
>>Download detailed specifications (PDF)<<