1. The pulse repetition frequency is in most cases around 70 to 90 MHz. 2. Low, medium and high pulse repetition frequencies reduce effects of ground clutter. 3. Some techniques using two alternating pulse repetition frequencies ( PRF ) allow a greater Doppler range. 4. It also switches and staggers pulse repetition frequency and transmits random jitter to further confuse countermeasures. 5. As electronics have improved many radars now can change their pulse repetition frequency , thereby changing their range. 6. Pulse-Doppler radar was developed during World War II to overcome limitations by increasing pulse repetition frequency . 7. Pulse Doppler relies on medium pulse repetition frequency ( PRF ) from about 3 kHz to 30 kHz. 8. It was modulated with 2-ms pulses at a pulse repetition frequency ( PRF ) of 2000 Hz. 9. Pulse Doppler radar relies on medium pulse repetition frequency ( PRF ) from about 3 kHz to 30 kHz. 10. As radar transmits coherent pulses with a certain pulse repetition frequency ( PRF ), the doppler processing technique is applied.
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