OSCOR OSC 5000 - Secure the Area; Activating a Known Sound Source

SECTION 6: CONDUCTING A SWEEP
95 REI OSC-5000E
The reference trace provides a very quick method of comparing the differences of the RF
spectrum of a Friendly environment with the Target environment. Also, once inside the
target environment, initiate the Automatic Mode on the OSCOR to look for signal
differences. The friendly signals will be ignored, and the OSCOR will scan quickly,
detecting any
new signals, which should be cause for suspicion.
If you have the OSCOR Personal Computer Interface accessory, load the friendly signals
once, then store them in your personal computer. For future sweeps, download the
stored signals from your PC to the OSCOR. This is faster and easier than loading signals
at safe distances before every sweep.
WARNING: If the OSCOR is placed too close to the target environment when
pre-loading the friendly signals, it is possible to detect and store an
eavesdropping transmitter as a friendly signal. It is, therefore, highly
recommended that each signal be manually inspected for verification, and that
the OSCOR be at least ½ mile (.8 km) from the building when pre-loading the
memory. This procedure should be exercised with caution or not used at all.
TECHNICAL NOTE: There are many intermittent signals that are only detected
occasionally such as a digital pager or a cellular phone system. These signals should not
be cause for immediate alarm, but they should be investigated.
Secure The Area
Once the sweep is in progress, do not let employees wander into the sweep area. For
sweeps performed during working hours, an employee, perhaps a receptionist should be
stationed outside of the target area to prevent intrusions. The employee does not have to
be aware of the sweep, but should be informed that an important meeting is in progress
and that no one is to be disturbed for any reason. Once inside the target area, close all
drapes and doors inside the area.
Activating a Known Sound Source
Activate a typical sound source of a work environment such as “elevator” music or easy
listening. Music should be at a volume slightly louder than typical background music.
Most buildings have an intercom system or speaker system that may be used to flood the
environment with sound.
NOTE: If a radio or TV signal has not been pre-loaded as a friendly signal, the OSCOR
will provide a false threat warning when the signal is detected, because the audio signal
will correlate with the sound source.