Chapter 12
Using TD-SCDMA Signal Analyzer
448
JD700B Series User’s Guide
Measurement example
Figure 267 Timogram with TD-SCDMA signal analyzer
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) depending on your selected measurement mode:
To set the limit for
Select
Set
Slot power
Slot Power
High Limit, Low Limit
Downlink pilot signal power
DwPTS Power
High Limit, Low Limit
Uplink pilot signal power
UpPTS Power
High Limit, Low Limit
Power between on and off
portions of the downlink slots
On/Off Ratio
High Limit, 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
TD-SCDMA receivers rely on the frequency or phase quality of the QPSK or 8PSK signal in order to achieve
the expected carrier to noise performance. A transmitter with high frequency or phase error is often still able
to support phone calls during a functional test. It displays the frequency errors numerically and graphically,
showing the binary representation of the demodulated data bits of the received signal using Constellation,
Midamble Power, Code Power, and Code Error screens.
Содержание CellAdvisor JD700B Series
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Страница 808: ...Appendix JD700B Series User s Guide 807 JD740B series ...
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