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Loggings => HF Mystery Signals => Topic started by: caylorman on February 20, 2019, 0253 UTC

Title: Unknown digital signal
Post by: caylorman on February 20, 2019, 0253 UTC

All,
   Can anyone help me determine what digital mode this is?  I've heard it a couple times on other frequencies.  At first I thought it might have been some variant of PACTOR, but the sweeping signals through me off.  Thanks.

https://soundcloud.com/e-j-caylor/6222018-1050-pm-906385-mhz-usb/s-Lgfsh

Title: Re: Unknown digital signal
Post by: Token on February 20, 2019, 0323 UTC

Go with your gut.  That is indeed PACTOR IV.  The sweeping tone is called a 2 tone chirp, and is part of the P IV.

T!