Technical data

Chapter 3 113
1xEV-DO Analyzer and Over Air Test
Interpretation of 1xEV-DO Tx and Over Air Analyzer Measurement
Results
1xEV-DO Analyzer and Over Air
Test
within the measurement interval. There are three types of modulation, and hence
four possible measurement results: QPSK, 8PSK, and 16QAM, and blank when no
modulation is detected. QPSK is the lowest type of modulation, 8PSK is the next
higher, and the highest modulation type is 16QAM. Only if all the slots within the
measurement interval are idle will the result be blanked out. The number of slots
over which the acquisition is made is determined by the Update Interval, which
itself is determined by the Meas Time setting.
A reading of 16QAM indicates high throughput for the access network. If only
QPSK is shown over time, then there may be a problem in the transmit path of the
acess network.