Tape recording system for radar

Claim 2

In a radar system wherein the receiver signal is in turn stored in a memory means, read out with time compression, filtered to remove backscatter, narrow-banded by contiguous filter and limiter means, analyzed and displayed, a tape recording system comprising: First signal stretching means connected to receive said receiver signal after the backscatter is removed by filtering but before the signal is narrow-banded by said contiguous filter and limiter meAns, said first signal stretching means functioning to stretch signals in a manner inversely related to said time compression and A first tape recorder connected to said first signal stretching means.

Claim 3

The tape recording system of claim 1 and further including: Second signal stretching means connected to receive said receiver signal after the signal is narrow-banded by said contiguous filter and limiter means and functioning to stretch signals in a manner inversely related to said time compression and A second tape recorder connected to said second signal stretching means.

Claim 4

A radar receiver and display system comprising: A radar receiver, the output signal of which has a large dynamic range; Memory means connected to said radar receiver and functioning to receive and store said receiver output signal and to read out said stored signal with time compression; Filtering means connected to the output of said memory means and functioning to block the portion of the memory output signal that results from stationary targets; Contiguous filter means connected to said filtering means and producing a plurality of parallel output signals in a plurality of very narrow adjacent frequency ranges; Limiter means connected to the parallel outputs of said contiguous filter means and functioning to limit the amplitude of each of the plurality of parallel output signals; Analysis and display sections connected to said limiter means; First signal stretching means connected to the output of said filtering means and functioning to stretch signals in a manner inversely related to said time compression in said memory means readout and A first tape recorder connected to said first signal stretching means Whereby said filtering means and said first signal stretching means modify the dynamic and frequency range of the readout of said memory means in such a manner that said first tape recorder can have reduced capabilities.

Claim 5

A radar receiver and display system comprising: A radar receiver, the output signal of which has a large dynamic range; Memory means connected to said radar receiver and functioning to receive and store said receiver output signal and to read out said stored signal with time compression; Filtering means connected to the output of said memory means and functioning to block the portion of the memory output signal that results from stationary targets; Contiguous filter means connected to said filtering means and producing a plurality of parallel output signals in a plurality of very narrow adjacent frequency ranges; Limiter means connected to the parallel outputs of said contiguous filter means and functioning to limit the amplitude of each of the plurality of parallel output signals; Analysis and display sections connected to said limiter means; First signal stretching means connected to the output of said filtering means and functioning to stretch signals in a manner inversely related to said time compression in said memory means readout and A first tape recorder connected to said first signal stretching means Whereby said filtering means and said first signal stretching means modify the dynamic and frequency range of the readout of said memory means in such a manner that said first tape recorder can have reduced capabilities.

Claim 6

The radar receiver and display system of claim 3 and further including: Combining circuitry means connected to the parallel outputs of said limiter means and functioning to combine the parallel outputs of said limiter means into a single output, Second signal stretching means connected to said combining circuitry means and functioning to stretch signals in a manner inversely related to said time compression in said memory means readout and A second tape recorder connected to said second signal stretching means Whereby said contiguous filter and limiter means and said second signal stretching means further modify the dynamic and frequency range of the readout of said memory means in such a manner that said second tape recorder can have capabilities less than said first tape recorder.