User`s guide

84 Chapter 2

S:\agilent\83217\OPT001\BOOK\CHAPTERS\tdscrip.fm

Test Descriptions

TEST_38 - RXD Traffic Channel FER

Description

This test measures the performance of the mobile station when

demodulating a forward traffic channel in an additive white gaussian

noise (AWGN) environment (no fading or multipath). The performance

of the mobile station is determined by the frame error rate (FER).

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 or 9 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. Sector A Power is set to -55 dBm.

3. AWGN is set to -54 dBm.

4. The RXD Maximum Frames for FER parameter is retrieved and that

value is entered in the Max Frames field.

5. The FER test is turned on with a confidence limit of 95%.

6. Traffic Channel level and data rates are set up and the first test is

triggered. The software waits for an GPIB interrupt to determine

when the test is done. The test times out and continues if the

interrupt does not occur within a period bounded by the RXD

Maximum Frames for FER parameter. If a timeout occurs, a timeout

message is displayed. This process is repeated for each of the six

tests specified in EIA/TIA

IS-98A.

7. The following measurement results are printed to the TESTS

(IBASIC Controller) screen. (For each test, FER %, number of frames

counted and number of errors counted is displayed):

• Traf Chan FER w/AWGN Ec/Ior=-16.3 & Eb/Nt=3.8

• Traf Chan FER w/AWGN Ec/Ior=-15.8 & Eb/Nt=4.3

• Traf Chan FER w/AWGN Ec/Ior=-15.6 & Eb/Nt=4.5

• Traf Chan FER w/AWGN @ 4800bps & Eb/Nt=4.0

• Traf Chan FER w/AWGN @ 2400bps & Eb/Nt=4.5

• Traf Chan FER w/AWGN @ 1200bps & Eb/Nt=4.6

1. These measurement results are for cellular and rate set 1 only.