SECTION 3: OSCOR MANUAL OPERATION
REI
OSC-5000E
54
*
WARNING!
Low correlation does not mean that the signal is not a threat; it only
means that the signal does not acoustically correlate with the selected form of
demodulation. Signals that are video content, digitally modulated, spread spectrum, or
frequency hopping will not correlate, so it is important to try to identify each signal.
Verifying Signals with Low Correlation
If a signal has low correlation, it is important to determine if the signal is being
transmitted from within the sweep environment. The best method of determining this is to
compare the signal strength within the sweep environment and outside of the sweep
environment. The best method for making this determination is to store a Friendly trace
frequency spectrum in adjacent offices and then compare the signal level in the sweep
environment using the sweep spectrum display difference mode.
Correlate Confirm Mode
The OSCOR built-in ringer (which sounds like a telephone ringing) can be used to
provide a reliable sound source for correlation.
To use the correlator confirm ringer:
1. With a signal selected in the Analyze Mode, press the CORR button to enter the
Correlate Mode.
2. Press F4 (labeled CONFIRM) or the TONE button to activate a ringer tone output
for positive ID. The volume of the ringer tone can be adjusted using the function
keys F1-F4.
* The LOUD setting for the Correlate Confirm Mode is much louder than a typical
telephone and is normally used only in large conference rooms or for penetration into an
adjacent room.
WARNING
:
In some cases, it is possible to have false readings from the loud mode
because the ringer is so loud that it vibrates the receiver unit at acoustic frequencies and
modulates a false signal into the receiver.
Strip Chart Plotter
The strip chart plotter can record the standards, the procedures and setup information for
a given sweep. Technicians can make notes on the printouts before entering them into a
logbook. In this manner, a sweep history of a location is available to provide faster
preparation and data collection during follow-up sweeps.
The plotter is primarily a WYSWYG (What You See is What You Get) style printing
function. In other words, to get a print of the OSCOR display, simply press the “PLOT”
button.
NOTE
: Video monitor is automatically turned off when the printer is being used.