 |
Login or Create an Account Items In Cart: 0 | Total: £0.00 |
|
Frequently Asked Questions: Contents
Frequently Asked Questions: Contents Minimizing transmitter detection Optimum conditions for transmitting radio frequencies Ideal emplacement of transmitters Scanners & private transmissions Covert transmitters & detection Telephone tap installation qualifications
Q: What can be done to maximize the transmission range of an audio surveillance transmitter? A: These factors help to determine the range: receiver type, terrain, location, atmospheric conditions, and environment. Using a
powerful radio receiver, the transmission range can significantly increase (by
almost 100%). If the terrain is a flat, open area, the range may extend a far
distance, exceeding the standard distance inherent in the audio surveillance
transmitters design. If the location or environment of use does not does not contain
any physical obstructions such as walls with metal or stone, thick trees, or
hills, the range should be acceptable. Avoiding ponds, lakes, and bodies of
water will help extend the transmission range. If the transmission is in a city
environment, keeping distance from radio towers, cell phone towers, or TV
broadcast antennas nearby will help to extend audio surveillance transmission
range.
Q: Regarding detection, what type of safeguards can be employed to prevent an audio surveillance transmitter from being discovered? A:
Physically hiding the transmitter in a hidden enclosure will help prevent
physical detection. Using a transmitter that is remotely controlled will also
minimize detection, especially if the user observes the targeted person
physically searching the target area. Q: Does the size of the antenna make a difference in the performance of a surveillance transmitter? A:
Surveillance transmitters that broadcast with longer antennas means that they
send out lower frequencies, while broadcasting with shorter antennas sends out
higher frequencies. Therefore, the size does not matter alone, and that other
factors play a part in the performance. The 5 performance factors are:
frequency, transmission control, modulation type, power supply, and the output
of power. Q: What does the power output have to do with the operation of the Transmitter? A: The power output is the amount of energy from the processing circuitry that 'sends' or 'pushes' the power out from the transmitter. Optimum conditions for transmitting radio frequencies Q: What are the optimal conditions for audio surveillance transmissions? A: Line of
sight. If the surveillance receiver can 'see' the surveillance transmitter,
with no blocking surfaces in between, such as a wall, roof, floor, tree,
vehicle, person, or animal in between, than the transmitter will be able to
obtain the best circumstance for audio surveillance to take place in. Q: What adverse conditions should be avoided when conducting audio surveillance? A:
Because www.AudioIntercept.com
microphones are so sensitive, it is helpful to avoid the sound of rain, excessive winds, crowds
composed of many people speaking simultaneously, and monitoring operations that
take place during heavy sunspot activity. Rain in particular generates extra
sound as it falls, hits roofs, windows, walls, the ground, etc. Rain generates
low frequency sound waves which may slightly decrease the high quality sound
capture of the surveillance transmitters' microphone. Ideal emplacement of transmitters Q: Where should surveillance equipment be placed to obtain ideal transmission range? A:
Surveillance Equipment should be placed close to the conversation, yet with the
antenna in a vertical position, the audio transmitter will be able to broadcast
a more 'efficient' signal. Also, the higher the transmitter, the more distance
to radiate outward the radio signal. Scanners & private transmissions Q: Can anyone stumble on the surveillance transmissions with a scanner, and how can transmissions be made private? A: Unless a
Digital Transmitter or an Encrypted Transmitter is being used for secure
surveillance broadcasts, a scanner may be able to acquire the signal. Q: How can the operating life be extended on a room transmitter? A: Because
room transmitters can only function for a limited amount of time, remote
activation features and voice activation features can eliminate unnecessary
transmitter activity (such as operating in an empty room) causing battery
drain. Covert transmitters & detection Q: Are covert transmitters undetectable? A: If a
covert transmitter such as a Sleeper Transmitter is not on, there is always the
possibility that the target may use a non-linear junction detector to scan the
area for all metallic objects, leading to detection. Q: Does the target know a telephone tap is on the phone line? A: If the
telephone tap was professionally installed, there should be no clicking sounds
on the phone line, and the target should be unaware that a telephone tap is
operating on the line. Only if a telephone analyzer or a tap alert is connected
will the user know of the presence of a telephone tap. Q: Does a phone bug or phone transmitter need to transmit to a recorder or a radio receiver? A: Like any
audio transmitter, a signal must go to a radio receiver, where the signal is
demodulated. After demodulation takes place, the signal may then be available
to connect to a surveillance recorder or voice logger.
Q: Can a non-professional install a telephone transmitter or is a professional telecom service person required? A:
Installing a telephone transmitter on a phone line inside of a home or office
may be easy to some people, but using a professional is always advisable, as
they know what to look for, how to make connections on telecom equipment that
the target probably is not aware of. |
