CDMA Measurements - Screens and Control Fields

Control Fields for CDMA Measurements

Sprd Fact (Spread Factor)

This selectable IS-2000 Code Domain field shows the spread factor (Walsh set) of the currently selected channel. The spread factor represents the number of Walsh channels available if all channels use this spread factor. A spread factor of 128 corresponds to a Walsh order of 7 and a channel width of 1 (out of 128). A spread factor of 8 corresponds to a Walsh order 3 and a channel size of 16. The spread factor is inversely proportional to the number of channels being used to generate a signal: The lower the spread factor the greater the number of channels being used to generate the signal. A lower spread factor, while using up bandwidth can accommodate a large amount of data, resulting in a higher data rate.

Lower spread factors are usually reserved for data transmission while higher spread factors are used for voice transmission.

Screens on which this field is present

CODE DOM (Code Domain Analyzer, IS-2000)

Start Frame

See “Data Source” on page 157.

Threshold

For Code Domain measurements. Enter the measurement display threshold for making code domain measurements. Walsh channels that have power levels below the threshold value are not displayed as active channels.

Operating Considerations

Querying Phase and Timing measurements for Walsh channels that are below the threshold level using GPIB will return a default value of 9e99.

Screens on which this field is present

CODE DOM (Code Domain Analyzer): auxiliary controls menu

Chapter 5

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Agilent Technologies 8935 series e6380a manual Sprd Fact Spread Factor, Start Frame, Threshold