I am currently working on Web App to coordinate Frequencies of Microphones.
I am not sure how to present the input of the Frequency. Basically a Frequency can be set in a range (eg. 400MhZ - 800 Mhz) and occupies a Bandwidth (eg Bandwidth is 5 and the chosen Frequency is 500, the range from 495 - 505 is occupied). The Frequency of some Mics, can be set up to a thousandth of 1 Mhz so the total Range of Frequencies could be quite big (eg. the 400-800 Mhz Range can fit up to 400 mics).
The User must know, what Frequencies are available and what are occupied. He then can enter any Frequency he wants (even occupied ones). There is also an algorithm that proposes possible frequencies in an free sub range.
I was thinking, of some kind of zoom-able timeline like slider (please correct me if there is an actual term for that). Where the ranges are colored based on their status. Next to it i display the list of proposed Frequencies for the currently visible part of the slider (BTW how to display the proposed values).
Since i haven't done anything similar before i have no idea if that's the right way to go or if maybe something different would be more handy. The Application is internal business app, so the usability is more important than the design. It also should work on small devices.