Agilent Technologies 8935 series e6380a Code Domain Measurements IS-95, Code Domain Power, IS-95

CDMA Measurements - Screens and Control Fields

CDMA Measurements

Code Domain Measurements – IS-95

If you have selected IS-95 only in the INSTRUMENT CONFIGURE screen, the Code Domain screen will appear as described in this section, with the Walsh Code ordering following the Hadamard paradigm, with 64 channels, total. These channels are referred to as “I” channels.

If you wish to make use of the extended Walsh ordering - Bit Reverse - as described by the IS-2000 standard, see See “Code Domain Measurements – IS-2000” on page 142.

The following measurements are displayed on the CODE DOM (code domain analyzer) screen: power, fast power, timing and phase. Measurements are selected from the Measurement field on the Main controls menu.

Time offset (Tm Ofs) and frequency error (Freq Err) are always displayed when any code domain measurement is made. Carrier feedthrough (CarFT) is also displayed except when fast power is measured.

Figure 5-5 Code Domain Power

O ther users & noise

Synch	Frequency Dom ain
Paging
	Frequency Domain
Pilot
U ser #2
U ser #1

freq

1.2288 MHz

0	1	2	3	4	5	6	7	8	9	32	63
Pilot Paging								User	User	Synch	User
								1	2		3

CodeDomainain

Walsh Code

Code Domain Power, IS-95

The Test Set provides two code domain power measurements.

•Absolute code domain power displays the power in each of the 64 Walsh channels, relative to the total power inside a 1.23 MHz bandwidth centered at the tune frequency. The 64 Walsh channels (0 through 63) are represented by a vertical bar on the analyzer’s display. To measure absolute code domain power the Ch pwr unit field on the CD Setup menu must be set to Abs (see Figure 5-6). Use the Marker controls to move the marker to the Walsh channel (Walsh Chan) you want to measure (see Figure 5-7 on page 140).

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