Generally this signal is not on 24/7. The times vary a bit, but most often it comes on after 1200 UTC and goes off about 2000 UTC (or maybe 2200 UTC, am at work and don’t have my logs here). Be sure to check the other frequencies mentioned in those other threads, often (almost always) it is on more than one freq and sometimes it is not on the 17299 kHz freq at all.
By the way, the frequencies I list in those other threads are all tuned freqs vs center freqs. All selected to keep the FSK inside the audio pass band and to give about the same audio excursion on each freq.
T!