JD780A Series Analyzers
Using TD-SCDMA Signal Analyzer
435
Measurement example
Figure 215
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 31 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.
Summary of Contents for CellAdvisor JD780A Series
Page 52: ...JD780A Series Analyzers 52 Getting Started Figure 6 Example of Web remote on Chrome...
Page 254: ...JD780A Series Analyzers 254 Using LTE FDD Signal Analyzer 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 323: ...JD780A Series Analyzers Using LTE TDD Signal Analyzer 323 3 RS SINR 4 S SS RSSI 5 P SS Power...
Page 390: ...JD780A Series Analyzers 390 Using EV DO Signal Analyzer 3 Pilot 4 MAC 64 5 MAC 128...
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Page 590: ...JD780A Series Analyzers 590 Appendix Figure 306 Append keywords window...
