From atwi77's post, it sounds like these ramp tests are variations on the Conconi test, which is simple to do on any equipment as long as one has a PM and an HRM. I've done those and found they can be quite accurate, but don't produce results particularly different from other tests using power, though the Conconi also produces a figure for LTHR, which I think is valuable. On long rides, I go more by HR than by power because HR tells more about one's physical condition, which becomes one's primary interest rather than speed. On a climb, if HR stays steady at one's best long climb power, one is doing all the right things. See:
https://www.researchgate.net/publica...flection_point
IIRC, the Conconi test increases speed by 1 mph/minute, gear is not changed. The warmup protocol I've used for many years is 20 minutes at a Z2 pace, 90" at 120%, 3.5 minutes Z2, repeat that interval and recovery, go at it at 30'.