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Test Descriptions

TEST_34 - TXD Traffic Channel Open Loop Power

TEST_34 - TXD Traffic Channel Open Loop

Power

Description

This test measures the range of the MSUT’s output power in response

to changes in the Test Set’s output power, Ior, while on a traffic channel.

This test is performed as follows:

1. A Service Option 2 (or 9 if parameter 19. RT Rate Set Selection

[0=9600 1=14400] is set to 1) call is attempted, unless a Service

Option 2 call is already connected. If the MSUT has not registered,

the call attempt may be unsuccessful and the error message “Failed

to establish a call in test <>” will be displayed. To correct this

problem, perform the CPD Registration test.

2. Power levels are set up according to values found in TIA/EIA/IS-98

standards.

3. Specification limits are set based on the MSUT power class and the

parameter TXD Antenna Gain.

4. The Test Set is put in Open Loop power control mode. In this mode,

the Test Set’s power control subchannel does not adjust the MSUT’s

output power based on signal strength measurements. Instead, the

Test Set’s power control subchannel outputs a fixed pattern of up

and down bits, holding the MSUT power level at or near its open loop

estimate.

5. Three power measurements are made on the MSUT as the Test Set

Ior is varied. The Channel Power measurement is used for the first

measurement and the Average Power measurement is used for the

following two measurements. The Test Set uses Open Loop power

control mode for this test. The call drop timer is turned off for

Ior=-25dBm so the call will not be dropped if the reverse link power

is too low for the test set to demodulate the data.

6. The following information is printed to the TESTS (IBASIC

Controller) screen:

• TXD Open Loop Pwr @-25 dBm <Channel Power measurement>

• TXD Open Loop Pwr @-65 dBm <Average Power measurement>

• TXD Open Loop Pwr @-104 dBm <Average Power measurement>

Refer to the Agilent 8924C Reference Guide for information about the

Open Loop power control mode, see the Closed Loop Pwr Cntl field

description.

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