AP 3302 Pt. 3
Section 1
CHAPTER 2
Basic Requirements Of A Pulse-Modulated Radar System
Many
factors have to be considered befor the p.r.f. and the pulse duration of a particular
radar installation are decided, but typical figures are a p.r.f. of 500 pulses
per second and a pulse duration of 1 us. For the figures quoted the transmitter
"fires" for only one millionth of a second and is then off for 1/500
second or 2,000 millionths of a second.
To give us an idea of what these figures really mean let us for the moment imagine them to be multiplied by one million as in Fig 4. This emphasises that the transmitter fires for only a very short period of time, the interval between each pulse beingrelatively long.
