- Input Impedance: 50k balanced
- Common Mode Rejection: >75 dB
- Maximum Usable Input: 10V p-p
- Preamp Auto attenuator: 0 to -20 dB ( with overload warning LED )
- Automatic Gain Control: -20 to +120 dB ( includes preamp auto attenuator )
- 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
- Frequency Response: 100 Hz to 15 kHz
- High Pass Filter: 300 Hz to 20 kHz
- Low Pass Filter: 100 Hz to 3 kHz
- Band Pass Filter: 300 Hz to 3 kHz
- Headphone Audio Output
- Line-Out Audio Output: 600
- Bias Control: 0 to +/-15V DC, 5mA max
(over current protected, input impedance is reduced to 3k ohms when bias is active)
- Digital Voltmeter: 3.5 Digit, auto zero, auto polarity, +/-199.9V AC/DC
- Power On/Low Battery LED ( LED off @ 6.0V )
- Maximum Input voltage: 250V AC/DC
- Leakage Resistance to Case: >10M
- Size: 7.3"(184.4mm) x 2.75"(69.8mm) x 1.75"(44.5mm)
- Weight: 12.1 oz (343g)
CMA-100 Countermeasures Amplifier
Countermeasures Amplifier (CMA-100)
The Counter Measures Audio Amplifier (CMA-100) 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, Alarm wire etc.
The CMA-100 is designed to provide flexible features and will prove to be very useful in many situations. This amplifier is quite useful for checking telephone lines and other wiring for hostile microphones, testing for hook switch audio leakage, and detection of eavesdropping devices that are sensitive to bias voltages or currents.
All TSCM equipment listed here is Dual-use Munitions List Items (MLI), or Commerce Controlled List Items (CCLI). MLI/CCLI items are highly controlled by the U. S. Government, and cannot be transferred, exported, sold, or given, to a foreign country, a non-U. S. Citizen or National, or a non-permanent U. S. Citizen, without a valid State and/or Commerce Department Export authorization that is issued in advance, and which actually issues forth from the Department of Defense and the U.S. Intelligence Community. Some equipment (or certain end users) even requires a formal authorization by the President of the United States for the transaction, and not even the DOS, DHS, DOC, DOD, DIA, or CIA can override this requirement.
It is the responsibility of the manufacture and of the end-user or purchaser, to comply with applicable requirements, and to obtain all necessary authorizations, licenses, or approvals to facilitate export, transport, possession, or acquisition. The use, disposition, export, import, or re-export of these items are subject to the provisions of law referencing written End-User Certification. Including, but not limited to, the Arms Export Control Act (22 USC 2751 et seq); Export Administration Act 1979 (50 USC App. 2041 et seq); as contained under Executive Order 12924; International Traffic in Arms Regulations (22 CFR 120 et seq); Export Administration Regulations (15 CFR 730 et seq); Foreign Assets Control Regulations (31 CFR 500 et seq); and the Espionage Act (18 USC 793 et seq), the Wassenaar Arrangement, and other treaties and laws. Even providing TSCM training, to someone who is not a U.S. Citizen requires also requires State Department approvals.
All TSCM, TEMPEST, SIGINT, and related equipment without exception is all covered by "The United States Munitions List" under ITAR 121.1, Category XI(b) as Military and Space Electronics, as "electronic systems or equipment designed or modified to counteract electronic surveillance or monitoring."
Most TSCM equipment is considered a Tier 1 defense article, but some more simplistic devices, tools, or systems may qualify only as Tier 2 devices on the USML or "Munitions List". Further, most TSCM equipment also qualifies as ECCN 5A001.e and 5A001 equipment and is subject to the export licensing authority of the Department of State, Directorate of Defense Trade Controls (22 CFR part 121).
By international treaty, most nations have laws that parallel these U.S. Laws (as arms controls), so that it is extremely difficult and costly to legitimately get this equipment across any borders of any country, and if you get caught with it, and you can not prove that you obtained in it very specific legitimate ways you could be in for a very awkward situation, but perhaps even not right away, but eventually.
This equipment, and this style of equipment and function of equipment was all initially designed by the U.S. Military, for purposes of military functions, and various companies evolved their products out of these military originated products, and then sold these new products back to the military which formed a closed loop that reinforced that these systems are still legally considered military arms.
Even if you are a U.S. Citizen and the equipment actually belongs to you and you are merely importing and importing it for your own use, you risk a forfeiture and seizure of all of your equipment that you are traveling with unless your paperwork is spot-on perfect.
Companies that manufacture TSCM and related equipment usually can not make a profit merely selling the equipment legitimately in their own country and they will often play games about the exportability of the gear, or will often falsify export paperwork in order to make an illegal sale (do not be taken for a fool). Generally, you should not trust what the company who actually makes the gear tells you, but instead seek the counsel of someone who actually works with a wide range of equipment across a range of companies and nations who can actually explain it in an unbiased way, these gurus, grey beards, engineers, and wizards can save you vast problems.
Better yet, go to your attorney, have then do some research, and then have THEM contact an expert in TSCM and assist them in gaining an in-depth understanding of the issues, then have them write inquiry letters to government agencies where the function and origin of the equipment is explained and ask for an official ruling from the government, in which your attorney then crafts into a legal memorandum. What the attorney eventually puts into their well researched memorandum will often dramatically be different then what the manufacture of the equipment will tell you.
As any legitimate approval for a transaction takes many weeks, and often months it is important to plan for notable delays, and not to wait until the very last minute to obtain needed gear. It is wisest for the actual end user to contact the U.S. Embassy in the country where the goods will ultimately be used, go through the interview and visitations process with them, initiate the end user approval process, and get approvals for the transaction six, eight, or even ten months in advance of the anticipated purchase from a cold-start. These pre-approvals are vital as they can usually reduce this approval time to less than 45 days (unless the customer is playing games). The custom in the industry is that once payment is made for the goods, the purchaser has only 90 days to perfect and consummate the shipment, so get as much pre-order approvals completed as possible (many companies have a deposit forfeiture policy if you do not get your export approval within 90 days, or double the regular approval cycle for ITAR 121.1 good for pre-approved entities).
Please call us if you have any questions, but generally, we will deal only with the actual end-user of the equipment, and will not deal with intermediaries, middle-men, or brokers. We always play it straight, we will not engage in export fraud, and we will have nothing to do with illegal arms shipments or trafficking. If you want to talk with a well recognized expert on these kinds of munitions and equipment, how to handle legitimate transaction, and avoid problems, then contact us, we can save you a lot of hassles.
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 can automatically adjust gain from -20 to 120dB.
Signals as large as 10V peak-peak can still be monitored with minimal distortions. Manual gain control can be set to 0, 25, 50, 75, or 100dB. Filters can be positioned to FLAT, LOW PASS, HIGH PASS, or BAND PASS.
This multifunctional amplifier has a built in AC/DC digital voltmeter, selectable audio filters, and an extremely wide dynamic range.
Balanced and Unbalanced high impedance inputs provide connectivity to a variety of suspect wiring.
The CMA100 also provides a bias voltage adjustable between -15V and +15V DC that is used to activate possible devices that are voltage or current sensitive. The bias generator is compatible with most types of line conditions.
All of these functions employ a sophisticated automatic gain control circuit that is superior to most audio amplifiers.
require a quotation; please contact Granite Island Group by
telephone at: (978) 381-9111, or via E-mail at: firstname.lastname@example.org
some specifications subject to change
If you are considering buying equipment listed on this page you would do well to ensure that you are dealing with a legitimate factory trained and certified organization like Granite Island Group.
We are factory trained and certified, with years of experience with this equipment. Our clients have been very pleased with our talent to supply equipment in a very timely manner, and with our honest and straight forward handling of their goods. Normally, we ship orders within 2-3 business days after the order is received (we often ship on the same day), and since we usually ship by express courier any delays are minimal. International shipments may take a little longer due to applicable export restrictions.
BEWARE: There are a huge number of crooked unreliable spyshops that will gladly take your money, but you will not get any equipment in return, or if you do get something it will not be what you ordered. These shady operators are not factory trained, have often never actually owned TSCM equipment or performed a bug sweep, and know virtually nothing about either the equipment being sold or TSCM. There has also been a rash of spyshops advertising this type of equipment at discounted prices (often online or via E-Bay), in almost every case the equipment is stolen, used, damaged, or the customer gets cheated out of their money. In some cases the equipment is used, damaged, or even a stolen unit. Many of these spyshops rip off graphics and/or materials from this website, and some are so bold as to claim copyright on these stolen materials. A few of them have even stolen materials from this site and then published them in book or CD form when you buy equipment from their spyshop. If they are ripping off materials from this site then they are likely going to rip you off as well.
We are honest, have an excellent reputation, and offer legitimate equipment, at fair prices, with favorable availability and shipping. We can, they can't.
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Granite Island Group
127 Eastern Avenue #291
Gloucester, MA 01930
Telephone: (978) 381-9111
International Callers: 001-978-381-9111