Patent ID: 7489905

Claim:
A test method for determining radio frequency (RF) path loss between an RF source and an RF receiver for a given RF channel in a given RF frequency band, the RF source transmitting RF power values at a relatively fine granularity, the RF receiver generating received signal strength indicator (RSSI) values at a relatively coarse granularity and having an unknown hysteresis about each transition between adjacent RSSI values, the test method comprising: determining a pair of hysteresis edges about a given RSSI value transition at the RF receiver by sweeping RF power values transmitted from the RF source in increasing and decreasing directions; determining a relationship between the relatively fine granularity RF power values and the relative coarse granularity RSSI values using the hysteresis transition edges; and determining the RF path loss for the given channel based upon a given RSSI at a given RF power value and the relationship between the relatively fine granularity RF power values and the relative coarse granularity RSSI values.