HLA is a time signal transmitter and is in use in Taedok, Science Town, Rep. of Korea at 36° 23'N 127° 22'E and continuously sends with a frequency of 5 MHz.
Technical Specifications: Pulses of 9 cycles of 1 800 Hz modulation. 29th and 59th second pulses omitted. Hour identified by 0.8 s long 1 500 Hz tone. Beginning of each minute identified by a 0.8 s long 1 800 Hz tone. Voice announcement of hours and minutes each minute following the 52nd second pulse. BCD time code given on 100 Hz sub carrier. DUT1: ITU-R code by double pulse.
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