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Conducting CDMA OTA measurements
This Over The Air (OTA) measurement has channel scanner, PN scanner, multipath profile, and Code
Domain power screens. It is used to verify CDMA transmitter performance at any location providing
reflective measurements and identifying signals providing from different sites. The Code Domain
power shows not only modulation performance metric but also amplifier capacity and code utilization
metric. The Amplifier capacity (code utilization) measurement is an estimate of the amount of power
amplifier capacity (code utilization) that is being used expressed in percent of maximum.
Channel scanner
Setting channel/frequency
Procedure
To set the channels to be scanned:
1
Press the FREQ/DIST hard key.
2
Toggle the Unit soft key and select Channel.
3
Press the Index soft key, and then enter an index number between one and six by turning the
rotary knob or using the numeric keys.
4
To select the standard channel, complete the following steps:
a
Press the Channel Std soft key. The standard channel window appears.
See "Appendix C – Band, frequency & channel standard" on page 530 for more information.
b
Highlight the band to be measured by using the rotary knob, the arrow keys, or the Page
Up/Page Down soft keys.
c
Press the Select soft key or the rotary knob to confirm the selection.
5
To set the channel number for the selected index, complete the following steps:
a
Press the Channel Number soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Press the Enter soft key.
6
The instrument displays a corresponding center frequency for the channel number.
7
To set the integration bandwidth for the selected index, complete the following steps:
a
Press the Integration Bandwidth soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Select the unit: GHz, MHz, kHz, or Hz.
8
To add more channels to be scanned, repeat steps 3-6.
9
Press the ESC hard key to dismiss the channel list window and view the scanning result.
To set the frequencies to be scanned:
1
Press the FREQ/DIST hard key.
2
Toggle the Unit soft key and select Freq.
3
Press the Index soft key, and then enter an index number between one and six by turning the
rotary knob or using the numeric keys.
4
To set the center frequency for the selected index, complete the following steps:
a
Press the Center Frequency soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Select the unit: GHz, MHz, kHz, or Hz.
5
To set the integration bandwidth for the selected index, complete the following steps:
a
Press the Integration Bandwidth soft key.
b
Enter a value by using the numeric keys. You can also use the rotary knob.
c
Select the unit: GHz, MHz, kHz, or Hz.
6
To add more channels to be scanned, repeat steps 3-5.
JD700B Series User's Guide
Chapter 10 Using CDMA Signal Analyzer
321
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