SECTION 5: DETECTING SOPHISTICATED TRANSMITTERS
85 REI OSC-5000E
SOPHISTICATED TRANSMITTER DETECTION METHOD
The best method of detecting sophisticated transmitters is to utilize the OSCOR Spectrum
Display modes to reveal the existence of sophisticated transmitters. The basic method is
the following:
1. Load Friendly signals at some distance away from the target environment (at least
½ mile).
2. When you enter the target room, first Clear the Peak Display Memory using the
following procedure:
a. Place the OSCOR in the Sweep mode.
b. Press the MENU button labeled “CONFIG”.
c. Press the F4 button labeled “MANAGE TRACES”
d. Press the F4 button to Delete the Peak Display Memory.
e. Press the F1 button to confirm the Peak Display Memory Delete.
3. Perform the normal Automatic analysis using the Automatic mode and then
evaluating all of the newly detected signals manually. (Note: During this time, the
peak memory display buffer is continuously being updated both during the normal
automatic and manual functions. If you have additional time, the OSCOR should
be placed in the Sweep mode with the Whip Hi Antenna selected. Simply letting
the unit sit in this mode for several minutes (up to 1 hour) will further improve the
probability of detection for any potential sophisticated transmitter.
To Search for Frequency Hoppers and Burst Transmitters:
1. Place the OSCOR (or OPC software) in the Peak minus Real-time display mode
so that any evidence of sporadic transmissions will be displayed.
2. Use the EXPAND or NARROW buttons to examine any suspicious trace data.
NOTE: you will see evidence of cell phones, pagers, two-way radios, or any other
signal that is not currently transmitting.
To Search for Spread Spectrum Transmitters and other Digital modulations not easily
detected automatically.
1. Place the OSCOR (or OPC software) in the Peak minus Friendly display mode so
that any evidence of RF spectrum differences will be displayed.
2. Use the EXPAND or NARROW buttons to examine any suspicious trace data.
To better understand these methods of detection, several examples and graphics are
provided in the following sections.
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