CMA-100 COUNTERMEASURES 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
FEATURES & APPLICATIONS
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: 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)
INCLUDED ACCESSORIES
There are currently no accessories associated with this product.
