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7 Cards in this Set
- Front
- Back
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Pulsed RADAR Transmission |
- Transmits short bursts. - Followed by listening period. - Uses same aerial transmission and reception. |
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Pulsed-Doppler |
- Transmitted a certain frequency. - Frequency of received signal will higher or lower. - Used to detect target and determine its relative velocity. - Range can be found with normal echo-ranging techniques. |
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Components |
- Synchroniser. - Transmitter. - Modulator. - Antenna. |
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Synchroniser |
- Synchronises operation of transmitter and indicator. - Generates continuous stream of short, evenly spaced pulses. - Master trigger sets PRF. - Sweep generator positive sweep gate used to turn receiver ON or OFF. - Sweep generator negative sweep used to un-blank display. - Sweep generator reference sweep deflects electron beam in correct direction. - Produces range rings. - Produces marker heading. |
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Transmitter |
- Produces pulse of high-powered RF energy, at the correct time, then fred to antenna. - Passes information regarding frequency of transmission to receiver for AFC circuits. - Operate over wide range frequency and power ranges. |
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Modulator |
- High-voltage pulse supplies to magnetron from modulator circuit. |
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Antenna |
- Mounted in a fixed position. - Beam scanned by individually controlling phase of radio waves transmitted and received by each radiating elements. - Employs grid of T-R cells. - AESA provides 10-30x more capability. - Multiple T-R modules means a failure of up to 10% of T-R modules will not cause loss of antenna. |
