Description Of Emissions

0043-EX-PL-2006 Text Documents

Telephonics Corporation

2006-02-01ELS_74368

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 – 33 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 383 to1600 Hz with 0.1, 11.25, 12, 22.5, 45, 125 or 180 microseconds pulse widths according to mode selections (see Table 1). The radar employs an azimuth scanning radar antenna with rates from 3 RPM to 120 RPM. The antenna may also stare at a target or sector scan a region of interest. The antenna beam widths vary from 1 to 3.5 degrees in azimuth 3 dB width and from 6 to 14 degree elevation beamwidth with a gain of 30 – 36 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 Emission Designator: 239M (MHz bandwidth), M (Modulated in position/phase), X (Cases not otherwise covered), N (No information transmitted). Frequency Station Emission Power Frequency Tolerance Class Designator 9.05 – 10.05 GHz FX Table 1 33 MW (ERP) within 24 MHz of the specified frequency 9.05 – 10.05 GHz MO Table 1 33 MW (ERP) within 24 MHz of the specified frequency

Table 1 Transmitted Waveform Characteristics Mode TX Pulse TX Modulation PRF PRI Scan Rate Av Power Peak Emission Width BW Pwr Designators (µsec) (MHz) Type (MHz) (Hz) microsecs (O/sec) (watts) (watts) Low RCS 30 125 Freq agile, LFM 1600(3) 625 360 400 7943 163MM1N Wid Area Surv. 10 12 Freq agile, LFM 750(3) 1333 72 300 7943 15M6M1N 100 Wid Area Surv. 50 12 Freq agile, LFM 395(3) 2532 72 160 7943 15M6M1N 200 WX & NAV 10 12 Freq agile, LFM 395(3) 2532 72 32 7943 15M6M1N (100) WX & NAV 50 12 Freq agile, LFM 395(3) 3532 72 160 7943 15M6M1N (200) GMTI 45 45, block agile, 900 - 1100(3) 1111 - 909 10 360 7943 58M5M7N 22.5, Stepped LFM 11.25 SART 10 0.1 Fixed Freq 1500(3) 666 72/360 120 7943 130KM1N 9375 MHz A-Scan 30, 10, 50 180 Fixed Freq 1600/750/395 625/1333/2531 360/72/72 400/300/160 7943 234MM1N Landspot – UH 10 210(2) 210 (x3)(2) LFM 1100(1) 909 searchlight 264 7943 273MM7N -1m 40 215 215 LFM 1100(1) 909 searchlight 264 7943 280MM1N Stripmap – UH 10 210(2) 210 (x3)(2) LFM 1100(1) 1072 searchlight 264 7943 273MM7N -1m 40 215 215 LFM 1100(1) 1072 searchlight 264 7943 280MM1N -3m 40 71.7 71.7 LFM 1100(1) 1072 searchlight 264 7943 71M7M1N - 10 m 40 21.7 21.7 LFM 1100(1) 1072 searchlight 264 7943 21M7M1N Seaspot – UH 13 210(2) 210 (x3)(2) LFM 388 2577 searchlight 264 7943 273MM7N -1m 50 215 215 LFM 383 2611 searchlight 160 7943 280MM1N 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 3.27 dB so the peak and average power at the antenna terminals is 0.471 of the power shown in the table. 6. The antenna gain is 34.5 dB for the VV antenna and 35.1 for the GMTI antenna 7. The GMTI transmit antenna is horizontally polarized 8. Non-GMTI antenna is veritically polarized


Document Created: 2006-02-01 10:09:57
Document Modified: 2006-02-01 10:09:57
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