| 摘要 |
A LORAN system designed especially for shipboard and aircraft installation so as to provide a navigator with accurate positional data. The system incorporates a precision time-delay circuit having incremental steps of 10 microseconds, together with an interpolator yielding an additional delay period varying from zero to nine microseconds. The end of this time delay period is the instant at which the lower sweep is initiated on the display. Also, a unique ADD-DELETE circuit either adds or subtracts pulses from the oscillator to allow a shifting of phase of the locally-generated PRF so as to match the phase of the received PRF.
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