OSCOR OSC 5000 - Figure 20 Multiple Sweep Displays; RF Spectrum Trace Display Modes

SECTION 3: OSCOR MANUAL OPERATION
33 REI OSC-5000E
RF Spectrum Trace Display Modes
The OSCOR provides several different ways to view the RF spectrum in the sweep mode.
These methods are very useful to detect and find sophisticated threats such as Spread
Spectrum, Frequency Hopping, and Burst transmitters. These trace modes are defined
below:
Real-time Trace – Provides the most recent view of the RF spectrum according to the
OSCOR receiver. This data is not stored in RAM memory and is only displayed as the
data is measured.
Friendly Trace – This is an image that is stored in RAM memory. This image of the
frequency spectrum should only be taken at a location that is known to be free of
bugging devices.
Peak Trace – This is an image that is stored in RAM memory. This image is
continuously updated based on peak values measured from the Real-time frequency
data.
Average Trace – This is a Trace display mode developed by averaging the Real-time
trace data. This image is not stored in RAM memory and is completely reset whenever
the frequency display window is altered in any way.
Difference Trace Display – This mode displays the difference between any two of the
traces described above. This mode is particularly useful for comparing a Friendly
Trace to a Peak Trace taken at a target environment. Using this trace mode, signals
that are unique to the sweep environment are quickly identified providing a very rapid
method of detection for some bugging devices including sophisticated transmitters
such as Spread Spectrum, Frequency Hopping, and Burst Transmitters.
The OSCOR display can also display multiple spectrum traces at the same time. To
indicate the difference in the traces, the secondary trace is shown on the OSCOR display
as a dot image.
FIGURE 20 MULTIPLE SWEEP DISPLAYS
The Friendly and Peak Trace display modes are stored in RAM memory in the OSCOR.
This data is retained in OSCOR memory even if the unit is turned off. This data is only
reset if the OSCOR memory is reset or if the individual memory buffer is reset. This
procedure is further described later in this section.