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N:\mkt\MANUALS\HP8924C\APPMOD\BOOK\chapters\amcproc.fb
Chapter 9, 264 Using the Analog Call Processing Subsystem
Using the ANALOG MEAS Screen
c
Select the lower
AFGen1 To
field and set it to 8 kHz.
d
Select the
AF Anl In
field and select
Audio In
.
e
Select the
Filter 1
field and select
C MESSAGE
.
f
Select the
Filter 2
field and select
>99kHz LP
.
g
Position the cursor on the
De-Emphasis
field and select
Off
.
h
Select the
Detector
field and select
RMS
.
i
Select the
AF Freq
measurement field and select
SINAD
.
j
Select the
Amplitude
field and begin to lower the transmitted base station voice
channel power until 12 dB SINAD is reached.
NOTE:
The mobile station might mute or drop off the air before a 12 dB SINAD is reached. The
performance of the mobile station at low RF levels is dependent upon the characteristics of
the mobile station (that is, what type of system it is designed for). Unlike a real base station,
the Test Set does not perform any protocol functions on the voice channel.
To Make an FM Hum and Noise Measurement
1. If not already done, condition the Test Set.
See "Conditioning the Test Set for Call
for further information.
2. If not already done, configure the Test Set.
See "Configure the Test Set" on page 286
for further information.
3. Connect the mobile station to the Test Set as shown in
bile Station to the Test Set," on page 269
.
NOTE:
The mobile station’s speaker output must be connected to the Test Set’s AUDIO IN and the
mobile station’s microphone input must be connected to the Test Set’s AUDIO OUT in
order to use the ANALOG MEAS screen.
4. Turn on the mobile station.
5. Ensure that the Test Set is in the connected state.
See "Page a Mobile Station" on
for information on how to bring a mobile station up on a voice channel.
6. If the ANALOG MEAS screen is not displayed, select the
ANLG MEAS
field from the
To Screen
menu. The ANALOG MEAS screen will be displayed.
NOTE:
It is recommended that the mobile station’s microphone be muted, if possible, when
making measurements on the mobile stations RF carrier. If the microphone is not muted it
is possible for extraneous noise to be picked up by the microphone and adversely affect the
measurements.
7. The following example illustrates how to make a FM Hum and Noise measurement:
a
Select the
Amplitude
field and set it to
−
47 dBm.
b
Select the
AFGen1 Freq
field and set it to 1 kHz.
c
Select the upper
AFGen1 To
field and set it to
Audio Out
.
d
Select the
AF Anl In
field and select
FM Demod
.
e
Select the
Filter 1
field and select
C MESSAGE
.
f
Select the
Filter 2
field and select
>99kHz LP
.
g
Position the cursor on the
De-Emphasis
field and select
750 us
.
Содержание HP 8924C
Страница 21: ...Contents 21 N mkt MANUALS HP8924C APPMOD BOOK APPMOD TOC Table of Contents Index 351 ...
Страница 22: ...Contents 22 N mkt MANUALS HP8924C APPMOD BOOK APPMOD TOC ...
Страница 51: ...51 N mkt MANUALS HP8924C APPMOD BOOK chapters amcall fb Chapter 2 Setting Up a Call 2 Setting Up a Call ...
Страница 71: ...71 N mkt MANUALS HP8924C APPMOD BOOK chapters amrcvrt fb Chapter 3 CDMA Receiver Tests 3 CDMA Receiver Tests ...
Страница 139: ...139 N mkt MANUALS HP8924C APPMOD BOOK chapters amtxtst fb Chapter 4 CDMA Transmitter Tests 4 CDMA Transmitter Tests ...
Страница 199: ...199 N mkt MANUALS HP8924C APPMOD BOOK chapters amhoff fb Chapter 5 CDMA to Analog Handoff 5 CDMA to Analog Handoff ...
Страница 317: ...317 N mkt MANUALS HP8924C APPMOD BOOK chapters amsrq fb Chapter 10 Controlling Program Flow 10 Controlling Program Flow ...