Chapter 11
Using EV-DO Signal Analyzer
JD700B Series User’s Guide
403
Setting limit for power vs. time tests
Procedure
1
Press the
LIMIT
hot key.
2
Press the
PvsT Test Limits
soft key.
3
Select the test item(s) and set the limit(s):
To set the limit for
Select
Set
Pilot power
Pilot Power
High Limit, Low Limit
Medium access control power
MAC Power
High Limit, Low Limit
Data power during the data period
Data Power
High Limit, Low Limit
On/off power ratio of the pilot and MAC
powers to the data power
On/Off Ratio
Low Limit
4
Optional
. You can enable alarm sound that goes off if the measurement falls outside of the limit.
Toggle the
Beep
soft key between
On
and
Off
to enable or disable the beep sound.
5
Optional
. Go to
SAVE/LOAD > Save
, and then select
Limit
to save the limit settings.
See “Using save” on page 35 for more information.
Conducting modulation measurements
In order to make accurate measurements of time offset and PN, you must connect an external trigger before
making a modulation measurement.
Constellation
The Constellation is used to observe some aspects of modulation accuracy and can reveal certain fault
mechanisms such as I/Q amplitude imbalance or quadrature imbalance. It displays constellation diagram by
modulation types.
Setting measure setup
After configuring test parameters as described in the “Configuring test parameters” on page 389, you can
continue your measurement. The measurement settings can be saved and recalled as a file. You can also
use JDViewer, PC application software to configure a measure setup, save as a file, and load the file on to
the instrument.
Procedure
1
Press the
MEASURE SETUP
hot key.
2
To set the Pseudo-Noise (PN) offset, complete the following steps:
Toggle the
PN Offset
soft key between
Auto
and
Manual
.
Enter a value by using the numeric keys to set manually, and then press the
Enter
soft key.
3
To set the incremental step for the PN offset, complete the following steps:
Press the
PN Increment
soft key.
Enter a value by using the numeric keys, and then press the
Enter
soft key.
4
Press the
Detect Mode
soft key, and then select the detection mode option:
Auto
,
QPSK
,
8PSK
,
16 QAM
, or
64 QAM
.
5
Optional
. Go to
SAVE/LOAD > Save
, and then select the save option from the choices available
for your measurement mode. See “Using save” on page 35 for more information.
Содержание CellAdvisor JD700B Series
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Страница 105: ...Chapter 4 Using Spectrum Analyzer 104 JD700B Series User s Guide Figure 44 PIM detection for multiple carriers ...
Страница 406: ...Chapter 11 Using EV DO Signal Analyzer JD700B Series User s Guide 405 3 Pilot 4 MAC 64 5 MAC 128 ...
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Страница 808: ...Appendix JD700B Series User s Guide 807 JD740B series ...
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