APPENDIX
A10
After loading, your waterfall data will be displayed.
The top half of the screen will display individual
traces. The bottom half of the screen will display
multiple traces in a waterfall format.
Tap the bottom half of the screen with the stylus and
turn the rotary knob. This will change the position of
the waterfall cursor. Notice as you move the cursor
through the waterfall data, the timestamp will
change to indicate the time the currently selected
trace was captured. Also, the top half of the screen
will change to display the currently selected trace
and peak.
You can scroll through the waterfall data by clicking
and dragging with the stylus or by pressing the arrow
keys. You can also zoom in and out on the waterfall
data by pressing the Narrow and Expand buttons.
By scrolling through the waterfall data
using the arrow keys, it is easy to see
intermittent transmitters that may have
begun transmitting during the waterfall
recording. The pictures to the right
indicate where the frequency hopper
and the burst transmitter began
transmitting.
By using the timestamp on the waterfall cursor, we
can determine the approximate times that
transmission began. From the timestamp shown in
the pictures on the right, we can determine that the
frequency hopper began transmitting on 2/22/10
around 10:41am. The burst transmitter began
transmitting on 2/22/10 around 2:02pm.
begins transmitting
begins transmitting
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