Description of Emissions

0425-EX-PL-2011 Text Documents

Telephonics Corporation

2011-08-31ELS_118900

Exhibit 1: Description of Emission, Modulating Signal and Necessary Bandwidth The emitter is an X-band Airborne Maritime Surveillance Radar employing various complex waveforms and PRF’s. A description of the waveforms is as follows: The transmission power is: Mean – 32 to 400 watts at the output of the transmitter Peak – 7943 watts at the output of the transmitter ERP – 14.6 MW (ERP) The radar employs frequency agility. The radar transmits on one of 100 frequencies in the range of 9.05 to 10.05 GHz on a PRI to PRI basis or block to block (CPI) basis. The radar varies the nominal PRF from 300 to1600 Hz with 9.6, 10, 13, 30, 45 and 50 microseconds pulse widths according to mode selections (see Table 1). The radar employs an azimuth scanning radar antenna with rates from 1.7 rpm to 60 RPM, but may appear to scan at 120 rpm due to its back-to-back antenna design. The antenna may also stare at a target or sector scan a region of interest. The antenna 3 dB azimuth beamwidth is about 2.1° and the 3 dB elevation beamwidth is about 3.2°, with a gain of 35.4 dB above isotropic level. The radar transmits with a variety of Pulse Amplitude Modulated Linear Frequency Modulated waveforms including Linear FM chirp, Stepped Frequency, and Frequency hopping. The waveform characteristics are detailed in Table 1. Station Location: Farmingdale (SUFFOLK), NY – NL 40-43-25; WL 73-25-15 Mobile: within 160 km Frequency Station Emission Power Frequency Tolerance Class Designator 9.05 – 10.05 GHz FX Table 1 14.6 MW (ERP) ±0.01% 9.05 – 10.05 GHz MO Table 1 14.6 MW (ERP) ±0.01%

Table 1 Transmitted Waveform Characteristics 5 Mode TX Pulse TX Modulation PRF PRI Scan Rate Av Power Peak Emission 5 Width BW Pwr Designators O (µsec) (MHz) Type (MHz) (Hz) microsecs ( /sec) (watts) (watts) (3) Low RCS 30 125 Freq agile, LFM 1490 671 360 400 7943 Q0N (3) Wid Area Surv. 10 12 Freq agile, LFM 712 1404 72 300 7943 Q0N 100 (3) Wid Area Surv. 50 12 Freq agile, LFM 368 2718 72 160 7943 Q0N 200 (3) WX & NAV 10 12 Freq agile, LFM 712 1404 72 32 7943 Q0N (100) (3) WX & NAV 50 12 Freq agile, LFM 368 2718 72 160 7943 Q0N (200) (3) GMTI 45 45, block agile, 900 - 1100 1111 - 909 10 360 7943 Q0N 22.5, Stepped PRF, 11.25 LFM (3) SART 10 0.1 Fixed Freq 1500 666 72/360 120 7943 P0N 9375 MHz A-Scan 30/50/50 190 Fixed Freq 1600/750/395 625/1333/2531 360/72 400/300/160 7943 Q0N (2) (2) (1) Landspot – UH 9.6 210 210 (x3) LFM 1100 909 searchlight 264 7943 Q8N (1) searchlight -1m 40 215 215 LFM 1100 909 264 7943 Q0N (2) (2) (1) searchlight Stripmap – UH 9.6 210 210 (x3) LFM 1100 1072 264 7943 Q8N (1) searchlight -1m 40 215 215 LFM 1100 1072 264 7943 Q0N (1) searchlight -3m 40 71.7 71.7 LFM 1100 1072 264 7943 Q0N (1) searchlight - 10 m 40 21.7 21.7 LFM 1100 1072 264 7943 Q0N (2) (2) searchlight Seaspot – UH 13 210 210 (x3) LFM 388 2577 264 7943 Q8N -1m 50 215 215 LFM 383 2611 searchlight 160 7943 Q0N Note: 1. The Imaging mode PRF is fixed at 1100 Hz at 300 kts, but updated to maintain a fixed PRF/V. In general for these Radar modes PRF = 1100/300*V*cos (Squint Angle) where V = ground speed of aircraft, Squint Angle = (A/C Ground Track - Swath Ground Track 2. In the UH imaging modes, 3 separate pulses, each of 210 MHz, are transmitted and stitched together on receive 3. The PRF stager for LRCS, WAS100, WAS200, WX & NAV (100), WX & NAV(200) and SART is pulse to pulse. The PRF stagger for GMTI is block to block. There is no PRF stagger for A-scan 4. The pulse compression ratios by mode are LRCS – 3750, WAS100 - 600, WAS200 – 600, WX & NAV (100) – 120, WX & NAV (200) – 600, GMTI – 2025, 1012, 506 and A-Scan – 5400, 1800, 9000 5. The average and peak power shown are at the transmiiter output. The transmit losses are 2.75 dB (minimum) so the peak and average power at the antenna terminals is about half ( 0.53) of the power shown in the table. 6. The antenna gain is 35.4 dB for the VV antenna and 34.8 for the GMTI antenna 7. The GMTI transmit antenna is horizontally polarized 8. Non-GMTI antenna is veritically polarized


Document Created: 2011-08-31 08:21:12
Document Modified: 2011-08-31 08:21:12
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