Question: What is the minimum upward offset required for the lowest test frequency (downlink and uplink) in UMTS FDD and 3.84 Mcps TDD options to avoid interference with adjacent frequency bands, considering the standard channel width?
Option 1: 0.8 MHz
Option 2: 2.6 MHz
Option 3: 5 MHz (equal to the channel width for FDD)
Option 4: 200 kHz (raster spacing)
Explanation: To avoid interference with adjacent frequency bands, the lowest test frequency needs to be offset upwardly by at least 2.6 MHz for both UMTS FDD and 3.84 Mcps TDD options, due to their channel widths, ensuring minimal interference while testing.