OPERATION
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• Threshold – The relative level of the RSSI graph can be adjusted to make it easier to see small
variations in signal strength. Select the Threshold icon from the Locate Sub-Menu and then
adjust the threshold level using the rotary knob. Press OK when you are done.
• Clear RSSI – Select the Clear RSSI icon to erase the currently displayed RSSI graph and begin
collecting RSSI data again.
Correlation
The correlation function allows the OSCOR unit to identify a demodulated analog audio signal as an
eavesdropping device. It compares complex sound patterns in the ambient room noise to the
demodulated audio to determine if they correlate or match.
To use the correlation function:
1. Ensure that the audio from the OSCOR unit is muted. If the demodulated audio is playing from
the OSCOR unit’s speakers it will be picked up by the OSCOR’s microphone, which will always
result in a correlation. If you wish to listen to the demodulated audio signal while using the
correlation feature, use headphones.
2. While demodulating an analog video signal, select Corr / Locate or press F4 from the Analyze
Mode Menu. (Note: From the Demod Submenu, it will be necessary to select Back or press F6
to return to the Analyze Mode Menu.)
3. From the Corr / Locate Submenu, select Corr / Range or press F2.
4. From the Corr / Range Submenu, select the Correlate icon. A new tabbed window, Correlation,
will appear displaying a correlation graph.
Random data throughout the graph indicates that the demodulated audio does not correlate with room
audio.
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