a
oscilloscope had a sweep speed of 1.0 microseconds per centimeter,
All
oscilloscopes were triggered simultaneously by the DC trigger device
located in the primary cathode follower and connected directly to the
receiving antenna,
The 2 microsecond delay line was added to permit the
leading edge of the waveform to be recorded.
In order to establish a definite time relationship between the recep~
tion of the signal and the trigrering of a given device such as a counter
or transmitter, a time marker pip, penerated by the delay trigger from
one of the oscilloscopes, was fed through the 2 microsecond delay line
and superimposed on the initial portion of the received waveform,
PROCEDURE
All oscilloscopes were calibrated against a known frequency standard
for sweep linearity.
The cathode follower triggering system was set to trigger aprrox~
imately 6 decibels above the noise level.
The vertical deflectors of the
oscilloscopes were set to receive the predicted field strength.
RESULTS
Station A - Parry Island
~~
Data was recorded on all oscilloscopes.
rELETED
~ Station B- Kwajalein
This station operated satisfactorily,
at this date,
C
it?
:
Leitelog
-71-
No results are obtainable