Technical data

Chapter 3 93
1xEV-DO Analyzer and Over Air Test
Optional 1xEV-DO Tx and Over Air Analyzer Measurement Settings
1xEV-DO Analyzer and Over Air
Test
Limits (see below). If you have Time Offset Limits On, the “ALL PASS” or
“FAILURE” messages are still displayed, even if
CDP and Metrics are switched
Off.
To reduce display clutter with all the available limit settings, no limit lines are
displayed on this screen.
• Frequency Error Limits: Sets the high and low Frequency Error limits for the
channel. Any measured frequency error that is outside of the set limits will result
in a failure indiction. The High limit is set by entering a positive number, and the
Low limit is set by entering a negative number.
• Time Offset Limits: Sets the high and low time offset limits for the channel.
Limits are set in microseconds. Any measured time offset value that is outside of
the set limits will result in a failure indication.
NOTE If you have Time Offset Limits On, the “ALL PASS” or “FAILURE” messages are
still displayed, even if CDP and Metrics are switched Off.
• On/Off Ratio Limits: This refers to the Idle On/Off Power Ratio, which is ratio
of the Pilot + MAC Power to the Idle Data Power. The result is blanked out
when none of the acquisition slots are idle, that is, when Idle Slots shows 0%.
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.
• Estimated Pilot Rho Limits: Sets the lower limit for Pilot Rho (the upper limit
is always 1.0, representing a perfect signal), and switches the Estimated Pilot
Rho Limits On or Off. Any measured, estimated rho value that falls below the
lower limit will result in a failure indication.
Pilot Rho is the measure of the modulation quality for a 1xEV-DO transmitter. A
Rho value of 1.0 represents a perfect signal, indicating that all the power is being
transmitted correctly. Estimated Pilot Rho is only measured over the 96 pilot
chips contained within every half-slot.
• Estimated MAC Rho Limits: Sets the lower limit for MAC Rho (the upper
limit is always 1.0, representing a perfect signal), and switches the Estimated
Pilot Rho Limits On or Off. Any measured, estimated rho value that falls below
the lower limit will result in a failure indication.
MAC Rho is the measure of the modulation quality for a 1xEV-DO transmitter.
A Rho value of 1.0 represents a perfect signal, indicating that all the power is
being transmitted correctly. Estimated MAC Rho is only measured over the 128
MAC chips contained within every half-slot.
• Max Inactive Ch Limits: This sets the high inactive channel power limits for