Growl and whoop tests question

[Alertronic6000]

My first question is about the short bursts themselves, why a few second (whoop) and not a full 3 minute test? Which brings me to my next question, Are growl/whoop tests done remotely or at the control panel? And my final question and this more so for 1980s-2000s electronic sirens (EOWS, Alertronic etc). Can the tone generator be adjusted in pitch and can the length of the windup/wind down also be adjusted? I’ve heard sirens start at a lower pitch, do a 3 minute test only to get cut off at the beginning of a wind down.

My city did a lot of whoop tests with our old dual tone Aca Alertronic 6000r system. A 3-4 second wind up, would echo across the city. According the the congrol panel, there wasn’t any growl feature present.

[nvanw27]

It's likely for the whoop tests they were remotely activating and de-activating the "whoop" or "alert" functions rapidly from their control point at the EOC, Fire Dept., etc. It's also possible it was a separate function on the board that was added after purchase.