SECTION 6: CONDUCTING A SWEEP
REI OSC-5000E 98
Considerations For Automatic Operation
When searching for threats using the Automatic Mode, the OSCOR should be allowed to
operate for at least two passes. While the OSCOR is in the Automatic Mode, a physical
search of the area can be performed to increase sweep efficiency. Using the OSCOR in
this manner provides two important functions:
1. All signals will be stored in OSCOR memory and can be reviewed manually.
2. Any eavesdropping transmitters should be found during this initial sweep of the RF
spectrum.
NOTES:
The recommended inputs in automatic scanning for most environments in a
dedicated sweep are the WhipLo, WhipHi, and Discone. The Whip and Discone
antennas cover from 500 kHz to 3 GHz, which easily encompasses the majority of the
expected threats.
In order to use the OSCOR in a covert mode, the correlate method should either be
PASSIVE or VERIFY (see page 78 Correlate: Acoustic Correlator System (Automatic)).
The Passive Mode is completely covert, but since it relies only on the ambient sounds
in the environment it is necessary to use a sound source for good correlation. The
Verify method of correlation is a two-step process relying first on passive sound
pattern matching followed by a confirm ringer when a threat is detected in the passive
method.
When performing a dedicated sweep, it is important not to overlook any signals. The
search level should not be set to FASTSKIM. The MED HUNT level is recommended.
To ensure that all potential threats are identified, the threat level should be set to 3.
The threat level is set low to ensure that potential threats are not ignored.
The Autoplot List Mode should be activated to provide a hard copy of all potential
threats.
Unknown Suspicious Signals
Any signals that are not readily identified as friendly should be further examined by testing
for sub-carrier or video content as described on page 40 Tuning Sub-Carrier and page
65 Detecting Video Threats.
If a signal is still a mystery, try using the SPECT button (see page 52 Oscilloscope
Analysis (Audio Spectrum Analysis Screen)) to visually inspect the variations in the signal.
There are digital signals such as digital pagers, messaging systems, and satellite
communications that do not contain audio information. These signals will have a
characteristic digital sound that may sound either like noise or you may be able to hear
digital tones when listening in the Analyze Mode.
If a signal is encountered that cannot be identified using any of the methods described
above, you may want to consider moving the OSCOR to several different locations
throughout the building to see if the signal strength changes. Generating plots of the
signal in different locations is a useful way to compare signal strength.
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