OSCOR OSC 5000 - Burst Transmitter Example; Figure 63 Burst Transmitter Peak Display (1500 Mhz and 250 Mhz Span); Figure 64 Burst Transmitter Peak Display Alternate Examples; Figure 65 Burst Transmitter Full Spectrum

SECTION 5: DETECTING SOPHISTICATED TRANSMITTERS
REI OSC-5000E 88
Burst Transmitter Example
In the example below, a graphic is provided simply to indicate that at any given sweep
(meaning the receiver sweep across the frequency spectrum), the OSCOR may only
capture a portion of the transmission as indicated below. However, on multiple sweeps
(passes through the spectrum) the entire envelope of the transmission may be filled in as
indicated by the Peak Display.
Burst Transmitter
FIGURE 63 BURST TRANSMITTER PEAK DISPLAY (1500MHZ AND 250MHZ SPAN)
The Figure below is provided as an alternate example simply to point out that you may
capture different portions of the burst signal, or possibly you will not capture any of the
signal on any given pass. However, all of these graphics were generated in a 5-minute
time period using a transmitter device that is advertised as being “undetectable by the
OSCOR”. Clearly this transmitter is easily detected.
FIGURE 64 BURST TRANSMITTER PEAK DISPLAY ALTERNATE EXAMPLES
The graphic below was generated in about 4 minutes at a narrow span of 100MHz to
completely fill in the full spectrum.
FIGURE 65 BURST TRANSMITTER FULL SPECTRUM