Balloon Telemetry

My apologies if this is a rudimentary question… How often does a Pixhawk broadcast telemetry data? I am working on configuring a Pixhawk in a high altitude balloon for antenna tracking. I’m not very educated in the Pixhawk, so am not sure where to look for the answer. I’m hoping to avoid it blasting a continuous stream to avoid interference with other electronics on board.

Pixhawk does NOT broadcast anything. So no reason to fear interference.
One does usually attach an modem (/radio) that does the transmission, depending on such radio, the frequency/frequencies/hopping/duty cycle and transmission power is configured (to the radio, not the Pixhawk)