Agilent Technologies 8924C, Примечания к продукту

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Contents
Section 1—Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Test Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Base Station (Test Set) Power Transitions . . . . . . . . . . . . . . . . 2
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Section 2—Test Equipment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Section 3—Connecting the Equipment . . . . . . . . . . . . . . . . . . . . . 4
References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Section 4—Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Section 5—Configuring the Test Set . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the RF Level Offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Setting the Pilot and Traffic Channels . . . . . . . . . . . . . . . . . . . . 8
Setting the Channel and Protocol . . . . . . . . . . . . . . . . . . . . . . . 10
Setting the CDMA Transmitter Power
Test Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Section 6—Setting Up a 20 dB Increment on the Test Set . . . . 12
Section 7—Determining the Test Set’s Trigger Time Delay . . . 12
Section 8—Configuring the Spectrum Analyzer
and Software
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Setting “CDMA Config” Options . . . . . . . . . . . . . . . . . . . . . . . 14
Setting the RF Channel Function . . . . . . . . . . . . . . . . . . . . . . . 15
Setting the Time Response Function . . . . . . . . . . . . . . . . . . . . 15
Appendix 1—Background on Open and Closed Loop
Power Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Open Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Closed Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Appendix 2—The Effect of Closed Loop Control
on the Open Loop Test
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Appendix 3—Determining Cable Connection Losses . . . . . . . . 18
External Power Meter Method . . . . . . . . . . . . . . . . . . . . . . . . . 18
Using the Agilent 8924C Test Set . . . . . . . . . . . . . . . . . . . . . . . 18
Appendix 4—Trigger Signal Description . . . . . . . . . . . . . . . . . . . 19
Making a Trigger Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Trigger Signal Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Open Loop Power-Control Time-Response Test
This product note will help you measure the “time
response of open loop power control” for a CDMA
mobile cellular telephone. The equipment and pro-
cedures in this document apply to CDMA mobile
cellular telephones based on TIA/EIA/IS-95-A, or
related industry standards.
Section 1—Introduction
The open loop power control time-response is
defined as the amount of time (t) it takes the
mobile phone to respond to and acquire equilib-
rium following a step increase in base station
power,
∆
P
in
.
This test verifies that the mobile is capable of
adjusting its transmit power throughout its dynamic
range of transmission within a power versus time
mask determined by applicable standards.
An example of this mask, with a
∆
P
in
= 20 dB and
∆
t = 100 ms, is shown in Figure 1. For TIA/EIA/IS-
95-A, the upper and lower limits of this mask are
determined by the equations shown on the follow-
ing page.
Agilent 8924C
CDMA Mobile Station Test Set
Product Note