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c.
NOTE
The Delay setting is used only when there is a time offset in the signals to be measured.
–
To select how to determine scrambling estimation, toggle the Scramble soft key and select
Spec or Full.
NOTE
The Spec searches "Sync Sequence Number" from 0 to 31 based on the TD-SCDMA
specification and determines "Scrambling Code Number" by using the sync sequence
number, while the Full does from 0 to 127 fully.
–
To select how to determine the Midamble spread factor estimation either in full or maximum
power search, toggle the Mid SF Map soft key and select Max or Spec.
NOTE
The Max determines the spread factor of the Midamble by using the maximum power of
the received Midamble, while the Spec searches "Default Midamble Allocation" based on
the TD-SCDMA specification.
–
To select the detect mode, press the Detect Mode soft key and then select the option:
Auto, QPSK/8PSK, QPSK, 8PSK, 16 QAM, or 64 QAM.
–
To set the relative threshold, complete the following steps:
a.
b.
c.
Measurement example
Figure 219 Code error measurement with TD-SCDMA signal analyzer
NOTE
You can use the LIMIT hot key to analyze your measurements with the user-definable
limit and Pass/Fail indication for the Max Inactive. See "Setting limit for modulation tests"
on page 442 for more information.
Press the µs soft key.
Press the Threshold soft key. Its default setting is -27 dB.
Enter a value between -50 and zero by using the numeric keys.
Press the Enter soft key.
Using TD-SCDMA Signal Analyzer
JD780A Series Analyzers
441
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