—
proportional to the input level radiation
testing 1s converted into an AC signal
suitable for radio or for telephone com=
munication circuit.
Actually what we do here ia we take
the DC signal and then convert it into first
pulses, the length of the burst to be proe
portionate to the radiation,
The length of the bursts as we call |
them vary anywhere from zero to three quarters
of a second from minimum radistion intensity
at a burst of three quarters of a second cor
responding to full acale sensitivity on any
range.
This is sent by a radio or telee
phone communication to the central atation
where the information is again reconverted
from AC back to DC suitable for driving
another one of thease recorders,
At this point which ig at what we
call the central plot, the path of the gir-
craft is also being plotted and this data
appears on the recorder which gives you a
profile of the conteminated area, is cor~
related with the aircraft's position in time
and a plot is then made of the area giving
12