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Signal view
The Signal view screen displays the correlation
function and shows a graphic representation of a
detected QAM signal. To enter the Signal view mode,
press the hot key immediately below the Signal box. The
red horizontal line is a threshold indicator, and when the
correlator response increases above this threshold line,
leakage is recorded. In order to exit from this mode, you
must press the hot key under the box labeled as Back. To view the Signal of other
channels, press the hot key under the corresponding box. Signal view is not available
for an analog channel.
Information displayed on signal view screen
The signal view screen provides quite a bit of information. The screen itself
represent the correlation function output – with a peak above the red threshold line
indicating leakage being detected. The graphic representation displays time delay on
the x axis and detected signal level in dBmV/m on the y axis. The peak level of the
correlation function contains a marker – and the equivalent level of the marker
displayed in the more familiar µV/m is displayed on the top right portion of the screen.
Below the marker signal level indicator is an indication of the time delay for the leak.
The bottom portion of the screen provides information on bands in which leakage is
being detected. The band displayed in white corresponds to the band currently being
displayed – in this chase channel 122 in the LTE band. The colors of the other bands
will changed based upon the leakage currently being detected in that band relative to
the alarm threshold entered in the device. Yellow is an indication of a low level alarm
and red is an indication of a high level alarm
Detected leak level –
Device
noise floor
Detected leak level –
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