SECTION 3: OSCOR MANUAL OPERATION
27 REI OSC-5000E
SECTION 3: OSCOR MANUAL OPERATION
This section provides an overview of manual control covering most of the OSCOR
functions. Most of these functions can also be automatically or computer controlled so
that the OSCOR can operate in a stand-alone configuration.
The basic detection approach for any receiver consists of the following steps:
1. Viewing the frequency spectrum to identify signals for analysis.
2. Selecting a signal for analysis and attempting to demodulate the signal.
3. Deciding if the signal is suspicious enough to try and locate it.
4. Locating the source of the transmitted signal.
The OSCOR has 4 basic modes of operation, which correspond to the basic steps
described above.
1. SWEEP Mode – Provides basic spectrum analysis functions which allow the user to
look at the frequency spectrum in real time.
2. ANALYZE Mode – Provides the ability to listen to the signal using basic types of
demodulation (AM, FM, Sub-Carrier, Single Sideband).
3. CORRELATION – Provides a function to determine if the signal audio is identical
to the current room audio.
4. Triangulate Mode or Locator Mode – Provides the ability to find the transmitted
signal. The locator probe method looks for the RF transmission (works well for
digital signals). The Triangulate Mode uses audio to locate the microphone
associated with the threat signal (works well for analog signals).
TECHNICAL NOTE: Modulation is the process of converting a normal signal to a radio
frequency suitable for transmission; demodulation is the process of converting a
transmitted signal from its modulated form back to its original signal form. The most
common types of modulation are AM (Amplitude Modulation) and FM (Frequency
Modulation).
SWEEP MODE (SPECTRUM ANALYZER FUNCTIONS)
The OSCOR contains a sophisticated digitally synthesized receiver (quad conversion
super heterodyne with 3 phase locked-loop synthesizers). Various intermediate frequency
bandwidths and demodulators allow the OSCOR to resolve wide or narrow bandwidth
signals, including sub-carrier audio.
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