3GPP2 Signal Analyzer Measurement Guide : EVDO Signal Analyzer
 
EVDO Signal Analyzer
 
Introduction
General Measurement Setup
EVDO Measurement Setup
PN Select Setup
MAC Codes Setup
EVDO RF Measurements Setup
Channel Spectrum Setup
Power vs Time Setup
ACPR Setup
Spurious Emission Setup
EVDO Demodulator Measurements Setup
CDP MAC Setup
Marker Setup (Activating Markers)
CDP Data Setup
MAC CDP Table Setup
EVDO Modulation Summary Setup
EVDO Over-The-Air Measurement Setup
Pass Fail Setup
EVDO Summary Setup
EVDO Measurement Descriptions
EVDO Menus
Freq (Frequency) Menu
Amplitude Menu
Setup Menu
PN Setup Menu
Measurements Menu
RF Measurement Menus
ACPR Menu
Demodulator Menu
Demodulator Menu (Continued)
CDP MAC Menu
CDP Data Menu
Over-The-Air Menu
Pass Fail Mode Menu
Marker Menu
Sweep Menu
Measure Menu
Trace Menu
Limit Menu
Other Menus
Introduction
The instrument offers three EVDO measurement options:
CDMA2000 1xEV-DO RF measurements
CDMA2000 1xEV-DO Demodulator, Rev. A compatible
CDMA2000 1xEV-DO OTA measurements, requires Option 31
CDMA2000 1xEVDO has a chip rate of 1.2288 MHz, the same as cdmaOne and CDMA2000 1xRTT. Each chip lasts for a duration of 0.8138 microseconds. In downlink, an EVDO signal can be time-divided into “half slots.” Each half slot has 1024 chips.
The 1024 chips in a half slot can be further time-divided into three different channels: Pilot, MAC, and Data. The Pilot Channel provides synchronization for the EVDO Access Terminals (for example, cell phones, laptops, and so forth.). The MAC (Medium Access Control) Channel controls the overall EVDO traffic. The Data Channel transmits data to various users.
The Pilot and MAC Channels are always active in an EVDO signal, but the Data Channel may sometimes transmit no data. When no data is transmitted, the half slot is considered idle. Otherwise, it is called an active slot.
The instrument can measure EVDO signals over the air (OTA) by connecting the antenna to the unit or by directly connecting to the base station.