Subaudible frequency on MOH

[phyberoptics]

Does anyone know the frequency of the tone under the MOH audio on Fleetnet? I'd like to trim it out with a notch filter.

 

[gary123]

There is no sub tone. what your hearing is the low level handshake between the radio and the repeaters. It has the same criteria as a DPL (210 hz on fleetnet.)

 

[phyberoptics]

Either way, it's a frequency, which was subaudible LOL. 210hz did the trick mostly. Thank you.

 

[slicerwizard]

Either way, it's a frequency

Of course it isn't. IIRC, it's 300 bps data, so it's multiple frequencies, none of which are higher than 150 Hz.

 

[gary123]

Technically, slicer is correct. I was dumbing it down (sorry). The 'tone" is actually low speed data configured identical to DPL but with a different format. A scope or scope program would show the data wave form if your really that interested.