FAS測試是OSS系統(tǒng)中RNO測試的一種，可以記錄下指定小區(qū)、指定頻點的干擾情況，最多可以同時記錄150個頻點的干擾情況（當然，我們沒有同時測試150個頻點機的機會）。FAS的測試記錄可以有以下用途：
1、監(jiān)控測試小區(qū)現(xiàn)有頻點的上行干擾情況；
2、通過上行干擾測試找到干擾最小的頻點給當前小區(qū)；
3、通過改頻前后兩次測試結果的對比檢查頻率調整的效果；
跳頻不會對FAS的測試結果有任何影響；

FAS測試的步驟：
1、設置與定義測試；
在開始測試之前，必須配置一個recording configurationg，包括：
•The cell set, defining in which cells to record.
•Frequency sets specifying which frequencies to measure. These frequencies will be monitored by each TRX of the cells specified by the cell set. Instead of specifying frequency sets, the frequencies can be specified to be those allocated to each cell (in the cell set).
•ercentile value specifying which RXLEV value to report from the recorded interference distribution. Example: the 90th percentile value of a distribution is the value which 90 per cent of the samples are lower than or equal to.
•Time schedule consists of a start date and the number of recording periods to run, a time mask and a week day mask.
•yes/no indicator if intermediate results shall be reported after each recording period.
當兩個測試中有共同的小區(qū)存在時，時間定義不允許有交迭，否則配置將不被接受；
同一時段內定義多于10個測試也不被接受；