--- In [email protected], petedcur...@... wrote:
" If you chose to go digital, like P25 then you could also measure BER in your coverage test? This maybe more meaningful. Although many public safety customers will still ask for voice checks as well. " ---------------------------------------------------------------------- Yes, BER is a valid method for coverage acceptance testing of digital systems. Often, a public safety system RFP will require the coverage testing to be performed using BER. Motorola favors this approach and their folks highlight the fact that their test system can perform the BER test using the exact mobile radio product [e.g. XTL5000] that the customer will purchase. The reasoning behind favoring the use of the actual subscriber unit relates to the difficulty in establishing an equivalence between a BER taken with a measuring receiver versus an actual subscriber radio where there can be significant differences in ENBW and noise figure. Although a compensation factor could be developed, doing so with a static [bench] test method does not assure equivalence in a real world faded, multipath + noise environment. Regarding the use of voice checks - large system acceptance testing requires so many data points that this is unworkable - other than as a product verification although in some cases the ATP [Acceptance Test Plan] will call for failed test grids [tiles] to be re-tested by voice.
