New-Tech Europe | Oct 2016 | Special Edition For Electronica 2016

receiver of the radar and raw video signal is processed in the radar processing unit. This processor provides synthesized TTL pulses that represent the reply frame. This frame is decoded in the FPGA with a precise width of individual pulses. Because the receiver also picks up noise from the antenna, some unwanted noisy pulses of the desired range are generated out. We developed an algorithm to discard these noise pulses and decode the actual frame. The FPGA then calculates the range and azimuth of the target, with the information code, altitude, and country code of the target. The system can receive synthetic TTL video using this format: actual target acquired from the antenna, simulated target internally generated in the radar, and target simulated through the VSG base on the interrogation pulse. Figure 4 shows the scan converter display decoded through the FPGA. Figure 5 illustrates the ACP; north simulation through the FPGA; trigger/sync pulse acquisition; reply pulse simulation based on the range and azimuth selection; acquiring the TTL video signal; and decoding the reply frame. Modulated pulses from the VSG contain a carrier of 1,030 MHz RF wave. Antenna Simulation The north marker pulse generation through the FPGA output and the ACP generation through the FPGA digital output provide antenna simulation. We created a user- configurable GUI based on LabVIEW to set the pulse width, PRT, and azimuth counts per north revolution

to simulate antenna parameters. Software Features We developed a modular, editable sequence of tests to test total functionality. Users can select either automatic or manual mode for individual parameter test. With a diagnostic panel, users can access the individual PXI instruments for loop-back or self-test. Figure 6 illustrates the sequence of tests present in ATE. Reducing Radar Test Time With the NI Platform With the ATE for SSR we created using NI PXI modular instruments and LabVIEW, our customer reduced radar test time by 90 percent compared to earlier desktop instrument manual connections. Our customer also saved 60 percent of costs compared to other ATEs built with traditional box instruments. In addition, the new system replaces the pulse generators and modulator with a single NI PXI VSG, which provides complete functionality test of target simulation, raw video acquisition, and target detection, making it a closed-loop tester. We plan to upgrade the system to test the redundant six ports of the radar with an automated switching incorporation. We will use an NI PXI-2596 SP6T multiplexer for the upgrade to avoid long cables and connections. A National Instruments Alliance Partner is a business entity independent from National Instruments and has no agency, partnership, or joint-venture relationship with National Instruments.

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