Best frequency range for 190

I want to know the best frequency range for Cambium Force 190…

What do you mean by 'the best frequency range'? Are you asking what part of the 5GHz band has the highest gain for the integrated antenna? Are you asking what frequency is typically the most quiet? Are you asking what band within 5GHz has the highest allowable EIRP?

Please provide some additional details on what you're looking for. Thanks!