Technical data

Chapter 3 67
1xEV-DO Analyzer and Over Air Test
Making 1xEV-DO Over Air Measurements
1xEV-DO Analyzer and Over Air
Test
Making 1xEV-DO Over Air Measurements
• “Preparing to Make 1xEV-DO Over Air Measurements” on page 68
• “Criteria for Making Valid 1xEV-DO Over Air Measurements” on page 69
• “Performing a Basic 1xEV-DO Over Air Measurement” on page 71
1xEV-DO over air measurements provide a quick method of verifying 1xEV-DO
transmitter performance. These transmitter measurements can be made on a base
station from the convenience of your vehicle without taking the base station out of
service. Over air measurements are especially useful in maintaining hard-to-access
cell sites such as pole-top base stations.
The 1xEV-DO Analyzer and Over Air option may also be used to measure signals at
a coupled port on the transmitter.
Important metrics for both Tx and Over the Air measurements include:
• Frequency Error
• PN and Time Offsets
• Non Idle Power
•Idle On/Off Ratio
• Pilot + MAC power
• Pilot Rho (estimated)
• MAC Rho (estimated)
NOTE To achieve valid over-the-air measurements, the test set must be stationary (not
moving).