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Subcarrier Modulation:

 10 - 500 kHz - Most Commonly Used Subcarrier Bugging Frequencies 
 
 15 - 150 kHz - Typical Broadcast FM/TV Subcarriers (TV/FMSubC)
  0 -  15 kHz - Typical Broadcast FM L+R Signal (Mono)
       19 kHz - Typical Broadcast FM Subcarrier - Pilot
 23 -  53 kHz - Typical Broadcast FM Subcarrier L-R Signal (Stereo, 38 kHz center)
       57 kHz - Typical Broadcast FM Subcarrier - RBDS/EAS
       67 kHz - Typical Broadcast FM Subcarrier SCA/Musicast/Musak
       92 kHz - Typical Broadcast FM Subcarrier SCA/Musicast/Musak

 15 - 105 kHz - Typical Broadcast Television Subcarriers (TVSubC)
  0 -  15 kHz - Typical Broadcast TV Audio L+R Signal (Mono)
    15.75 kHz - Typical Broadcast TV Subcarrier - Pilot
    31.50 kHz - Typical Broadcast TV Subcarrier L-R Signal (Stereo)
    62.94 kHz - Typical Broadcast TV Subcarrier - SAP Secondary Audio
   102.27 kHz - Typical Broadcast TV Subcarrier - Cue Channel
   
   2 - 10 MHz - Typical Video Component Subcarriers (4.2 - 8 MHz common)

5 kHz - 750 kHz - Realistic Subcarrier Threat (Audio)
5 kHz - 15 MHz - Realistic Subcarrier Threat (Video)

Note: A typical FM broadcast may contain 2 to 12+ subcarrier voice
channels in addition to the main signal, and subcarriers may have
subcarriers.

VLF and Carrier Current Type Bugs


  9 kHz -   490 kHz   Carrier Current 47 CFR 15.219 Auth (250 mV max.)
490 kHz - 1.705 MHz   Lossy Cable     47 CFR 15.221 Auth (1000 mV max.)
450 kHz - 30.00 MHz   PLA Systems     47 CFR 15.207 Auth (30 mv@ft/30ft max.)

  3 -	200 kHz	   300 mW        High Grade Pro Bugs (over 500$ each) 
100 -	200 kHz	  50-100 mW	 Older VLF Bugs 
120 -	200 kHz	  30-50  mW	 Pre 1990 intercoms  
200 -	300 kHz	  30-50  mW	 Post 1990 intercoms  
300 -	400 kHz	 250-450 mW	 TELCO Line transmitters (355 kHz popular) 

300Hz -	30 kHz	Cable TV Carrier - Hardwired Microphones (Baseband Audio)
30 kHz -300 kHz	Cable TV Carrier - Coaxial Bugs (Wideband Audio/Video)

100  -	450 kHz	Threat Window #1 Most CC Bugs 
3 kHz -	  3 MHz	Threat Window #2 Expensive "Pro-Grade" Bugs 
5 kHz -  32 MHz	Threat Window #3 Popular WJ Carrier Current Rcvr 
3 kHz -  50 MHz	Threat Window #4 Realistic Threat Window for Telephone Wire
15 MHz - 70 MHz	Threat Window #5 Audio/Video "Micro-Wire" RF circuits


VLF Devices


 25 kHz -  90 kHz	Tape Recorder Bias Osc-Low End (35-45 kHz Common)
 80 kHz - 145 kHz	Tape Recorder Bias Osc-Mid Range (88.2, 96, 100 kHz Common)
100 kHz - 325 kHz	Tape Recorder Bias Osc-Pro Grade (100, 150, 300 kHz Common)
 40 kHz -  50 kHz	Tape Recorder DAT/Hi8 (44.1/48 kHz Common)
 
  4 kHz -  35 kHz	Recorder Audio Servo Noise (10-20 kHz Common)

 7 kHz - 35 kHz	Video Camera VLF Detectable emissions
   15.750 MHz	Common NTSC Video Camera
   15.734 MHz	CCD/PCB Video Camera (very easy to detect)
   15.625 MHz	Common Video Camera

Also, be aware that ultrasonic signals are emitted from most VLF
devices. (Utilize a EOD/Bomb Tech Stethoscope, and Spectrum Analyser
with an wideband ultrasonic transducer).


WECO Bugs
Boosted/ultrasonic audio coupled to Power, CATV, and TELCO lines


 64 kbps to 1.5 mbps Digital Bugs	T-Carrier-Lo (T-1 and Below) 
1.5 mbps to 50 mbps  Digital Bugs	T-Carrier-Hi (T-1 and T-3) 
2.048 mbps           Digital Bugs	Definity Circuit Pack Bug 
32 mbps              Digital Bugs	TMS Channel/Backplane bridge 
Designed to transmit QAM on Microwave Spread Spectrum (2.4-9.0 GHz)


Advanced TSCM Signals Detection and Analysis
TSCM - Sweeping the Spectrum for Eavesdropping Devices

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