[amsat-bb] Explorer-1 Prime - how long is the tracking tone?

According to the Explorer-1 Prime operations web page at

http://ssel.montana.edu/e1p/operations/

the satellite will transmit a 2200 Hertz tracking tone before each FSK AX.25 packet is transmitted.

What is the duration of the tracking tone? one second? ten seconds?

Does anyone have a sample recordings of the tracking tone and beacon?

Douglas KA2UPW/5