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CMS-15 

COUNTERMEASURES SET 

INSTRUCTION MANUAL 

The CMS-15 Countermeasures Set consists of the following instruments and 
accessories: 

1) TD-53 Advanced Transmitter Detector
2) P-01 Wideband RF Probe
3) P-02 Infrared Probe
4) P-03 Line Driver
5) P-04 Carrier Current/Video Camera Probe
6) TT-46 Advanced Wiretap Detector
7) Headphones
8) Various cords, adaptors and Padded Carrying Case

ABOUT THE TD-53 

Size: 3.75” x 5.5” x 2” 
Weight: 10 oz. 

Battery: 9 volt alkaline- Use only alkaline batteries- carbon/zinc batteries will not give 
satisfactory performance. 

Current: 25 mA average. 

Audio Output: Up to 100 mW, internal speaker or headphones. 

Indicators:  

METER – 10 step LED – Each step represents a 3 dB change in signal strength. 

AUDIO – In the 

DETECT

 mode, an audible “click” will be heard. The clicking rate will 

increase as the signal strength increases. In the 

VERIFY 

mode, audio picked up by 

the bug may be heard. As the bug is approached, a high pitched squealing tone will 
be heard. 

Controls:  

VOLUME – In addition to acting as the on/off switch, this control is used to change 
the audio output level. 

SENSITIVITY – Normally left in 

HIGH

. The 

LOW

 position reduces the sensitivity by 

12 dB. 

MODE – In the 

DETECT

 position, a “clicking sound” will be heard in the speaker.  In 

VERIFY

 position, a squeal is heard if the probe is near a transmitting bug. 

EARPHONE JACK – For non-alerting listening, use with 4 to 2,000 Ohm 
headphones. 

1

Summary of Contents for CMS-15

Page 1: ...nternal speaker or headphones Indicators METER 10 step LED Each step represents a 3 dB change in signal strength AUDIO In the DETECT mode an audible click will be heard The clicking rate will increase as the signal strength increases In the VERIFY mode audio picked up by the bug may be heard As the bug is approached a high pitched squealing tone will be heard Controls VOLUME In addition to acting ...

Page 2: ...Connect the probe by plugging it into the jack located at the hinge end of the unit Be sure the plug is completely seated in the jack Now turn the unit back ON In low RF areas the meter will read 1 and a slower clicking rate will be heard Extend the probe antenna to its full length FINDING BUGS WITH THE TD 53 This section is not meant as a complete course on finding bugs but it will give you some ...

Page 3: ...n a situation where a body transmitter might be present set up the unit ahead of time so that you or an assistant can observe the meter Of course you would keep the volume turned down The probe can be positioned up to 25 away from the TD 53 by using an available extension cable For example the probe could be discreetly hidden in the target room while the TD 53 is in another room If the meter readi...

Page 4: ...a longer useful life The main advantage of the battery pack unit is that it is very easy to attach To check a vehicle for bugs turn the ignition on but don t start the engine Ignition noise will thoroughly confuse the TD 53 Sweep around under and inside the vehicle with the probe Because of the limited brightness of the indicator LEDs it would be better to do this away from direct sunlight if poss...

Page 5: ...s checks This can be a fatal oversight from a security standpoint The P 02 is a special probe designed for use with the TD 53 Transmitter Detector which allows the technician to search for sources of infrared IR transmissions In the case of amplitude modulated or pulse frequency modulated sources the technician can actually listen and determine whether the beam is carrying voice or other intellige...

Page 6: ...ine Driver switch is operated this LED glows if 400 uA or more is being drawn by the wire pair under test The more current that is drawn the brighter the LED will grow Controls LINE DRIVER OFF This switch applies a voltage to the wire pair under test to turn on voltage activated microphones Never turn this switch on if the RED LED indicated a voltage present on the wire pair If you do the TD 53 an...

Page 7: ... just like microphones Use the following procedures to search for hidden microphones 1 Turn on a sound source in the target room such as a radio Next turn on the TD 53 and set the MODE switch to VERIFY Ignore any indications on the LED meter Make sure the DRIVER switch on the P 03 is OFF 2 Connect to P 03 alligator clips to the wires to be tested If necessary scrape just enough insulation off the ...

Page 8: ...crophone can be located by reducing the volume and pointing the speaker at different locations in the room NOTE You should be aware that using the feedback mode to locate a hidden microphone can alert the L P that the mic has been located 7 A complete check of the target room would also include listening for room audio on any telephone wires present The reason for this is that a telephone can be m...

Page 9: ...al The battery compartment is accessed by using a flat blade screwdriver and separating the top cover from the bottom cover Connect the battery to the battery snap and place in the holder Reinstall the cover The P 04 Range switch should be OFF Plug the P 04 cable into the probe jack on the top end of the TD 53 If you plan to use the headphones go ahead and plug them into the TD 53 headphone jack F...

Page 10: ...o you will have to search with the P 04 probe As you get closer to the device the sound will become louder 7 Carrier current transmitters are associated with power line attacks You should be aware however that telephone lines and other wire pairs can also be used To check these other wire pairs simply place the P 04 antenna next to the pairs you want to check and repeat steps 4 and 5 above 8 For a...

Page 11: ...g the P 04 slowly up and down from ceiling to floor 4 If there is an operating video camera in the room you will hear a low pitched tone As you get nearer the camera the tone will get louder When you are very close to the camera 1 to 2 ft the pitch of the tone will change to a higher frequency The VLF antenna on the P 04 is directional with maximum signal pick up off the end of the antenna This di...

Page 12: ...or several terms used in this manual BUG Clandestine listening device HOOKSWITCH BYPASS Modificati ass them down the phone line to a listening post even with the phone hung up Turns the telephone into a bug PARALLEL TAP Connected across both wires of a pair Usually used to activate a tape recorder DC resistance ranges from 10 to 35 megohms May also be a radio ansmitter in which case a separate bat...

Page 13: ...gs wired inline Detects resistances of 10 ohms or more VERIFY Lets you listen to a wire pair for the presence of room audio DRIVER Applies a voltage to a wire pair to turn on a voltage operated device such as a FET microphone TEST 1 TEST 2 Reverses the connection to the pair under test Useful for detecting certain polarity sensitive devices PAIR Selects one of six combinations for testing All test...

Page 14: ...ilding does not use modular jacks it will be necessary to connect the TT 46 using the coupler and cord with alligator clips Connect color to color i e red to red etc 4 Push and hold down the PUSH TO TEST PTT button The Parallel LED should glow green While continuing to hold down the PTT button rotate the Pair switch through all six positions Then release the PTT switch If the Parallel LED flashed ...

Page 15: ...itch to Test 1 and the Volume to midrange 2 Press the PTT switch and listen for room audio or feedback squeal Release the PTT switch and move the Pair switch to the next position 3 Do step 2 for each position of the Pair switch When all six pairs have been checked return the Pair switch to the R G position 4 Set the Test switch to Test 2 and repeat steps 2 and 3 5 Disconnect the TT 46 and return t...

Page 16: ...hone into one jack of the dual coupler and the TT 46 into the other jack 3 Lightly tap the phone housing with a pen or pencil If you hear the tapping in the TT 46 speaker it is an indication that the phone is capable of transmitting room audio down the line when the phone is hung up You may also hear a feedback squeal depending on the sensitivity of the hookswitch bypass 4 Rotate the Pair switch t...

Page 17: ...ways phone systems are wired In the loop method each phone is connected at different points to the same wire run In the branch method a separate wire pair is run to each phone location from the TNI When performing the Parallel test all the wiring is tested at one time regardless of the wiring method used In the Series test if the test was made at point D in the Loop Wiring method the entire loop w...

Page 18: ...prosecuting whoever placed the illegal tap Most law enforcement departments do not have the manpower to help if you just suspect a tap but if you have the physical evidence they should be willing to investigate Remember wiretapping is a Federal crime as well as a violation in most states LIMITATIONS While the TT 46 will detect the most common on premises wiretaps and hookswitch bypasses there are ...

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