ay
receiving antenna.
The 2 microsecond Jelay line was adiei to permit
the leading edge of the waveform to be recordel,
In order to establish a definite time relationship between the
reception of the signal and the triggzering of a given device such as
a counter or transmitter, a time marker pip, generated by the delay trigger from one of the oscilloscopes, is fed through the 2 microsecond delay
line and superimposed on the initial portion of the received waveform,
PRCCTDOURE
All oscilloscopes are calibrated against a known frequency standard
for sweep linearity.
he noise level.
cr
ty
w
ry
oO
<j
a
or
be
*
cf.
The cathole follower triggering system is set to trigger approximately
The vertical dcflector of the oscilloscopes
are set to receive the pradicted field strength.
Station A - Par-y Island
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en eee ine =
Sintion B = Kwafalein
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l
r
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