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32 Chapter 2

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Test Descriptions

TEST_11 - TXA RVC Data Deviation

Description

This test provides three possible modes of operation, determined by:

The first method, selected by setting parameter 48. TXA Transient/ss

data [0=tran 1=bth 2=ss] to 0=tran, measures the Peak+ and Peak

−

frequency deviation of the data in the entire Reverse Voice Channel

(RVC) burst to ensure that it is within the specified limits.

The entire burst is tested by sending the FVC message 5 times while

the peak+ hold detector is on, and another 5 times while the peak

− hold

detector is on.

The second method, selected by setting parameter 48. TXA

Transient/ss data [0=tran 1=bth 2=ss] to 1=bth, first performs the test

on just the steady state portion of the RVC data signal, followed by a

test of the entire signal (described above).

The steady state portion of the test is performed by measuring the RVC

data signal between 20 ms and 50 ms following the beginning of the

data burst. The peak + and

− results are compared to values in pass/fail

limit 38. TXA Wideband Data Deviation Steady State (kHz). The

results of the transient portion of the test are compared to values in the

pass/fail limit 39. TXA Wideband Data Deviation Transient (kHz).

The third method, selected parameter 48. TXA Transient/ss data

[0=tran 1=bth 2=ss] by setting to 2=ss, performs the test on just the

steady state portion of the RVC data signal (as described above).

NOTE

In all three methods, the MSUT should blank the SAT tone before

sending the RVC message; therefore, SAT deviation should not be

included in the deviation measurement. If the MSUT has an open

microphone, the readings may be affected by background noise. In this

case, mute the handset. Using the first method, 0=tran, Agilent

Technologies has found that some cellular telephones fail this test

because the telephones produce a carrier frequency transient, typically

during the first 10 mS of the data burst. This causes the peak frequency

deviation to exceed the maximum specification of

±8 kHz ±10% (or a

total of

±8.8 kHz) specified in the EIA/TIA IS-98 Standard. This test,

while conforming to the EIA/TIA IS-98 Standard, captures the peak

deviation during the first 10 mS of the data burst and will indicate a

failed test result if the MSUT exceeds the specified limits.

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