Agilent Technologies E8285A manual Expected TAdd

Chapter 4, Description of Fields

Fields

Expected T_Add

This field is displayed only when TIA/EIA-95B is selected in the "Protocol" field on page 346. Refer to ANSI/TIA/EIA-95-B, 6.6.6.2.6, Set Maintenance, for additional information.

This field displays an integer value representing a power level threshold. The Test Set calculates this threshold based on several field settings, included in the formula below. The purpose of this calculation is to determine the approximate power level threshold that will cause the mobile station to add a Neighbor Set pilot to the Candidate Set.

To compare Expected T_Add with the current value the mobile station should be receiving, refer to the "Expected Strength" field on page 253.

GPIB Example

“CDMA:MOBile:PARM:ETADd?“

queries the Expected T_Add value calculated by the Test Set.

Operating Considerations

The value displayed in this field is calculated by the Test Set using the following formula (unless the "Soft Slope" field on page 400 is set to 0):

E x p e c t e d T A d d = 2	×	⎛	S o f t S l o p e	× 1 0 × l o g ∑	P S	A d d I n t e r c e p t s	– T A d d s ⎞
		m a x ⎜	-------------8------------			+ -------------------------------------	, --------------------	⎠
		⎝		i ∈ A	i	2	2

where PSi is defined as Ec/Io for the pilot in question.

The calculations used in determining Expected T_Add do not account for any interfering signals the mobile station may be receiving in addition to the forward CDMA channels from the Test Set.

If the "Soft Slope" field on page 400 is 0, the Expected T_Add field will display the same value as that currently entered in the T_Add field.

See Also

T_Add field description, on page 420

Add Intcpt field description, on page 154

Soft Slope field description, on page 400

Status (Mobile Reported Pilot Strength) field description, on page 410

Expected Strength field description, on page 253

Softer Handoff field description, on page 399

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