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13 Modulation Accuracy (Composite EVM) Measurement
Index: n
Results Returned
3.0: Slot Format 3
4.0: Slot Format 4
5.0: Slot Format 5
- If Sync Type is PRACH, the value returned is –999.0.
- In BTS mode, the value returned is 999.0.
16.
Preamble Signature
: (floating)
- BTS mode
The returned value is always –999.0.
- MS mode
In Preamble Signature auto-detection mode, the detected signature code number (from 0.0
to 15.0) is returned when the Sync Type is PRACH Message.
In Preamble Signature manual setting mode, the retuned value is the same as the parameter
setting. When the Sync Type is not PRACH Message, the returned value is –999.0.
2
Chip EVM
:
EVM trace returns a series of floating point numbers (in percent) that represent each sample
in the EVM trace of Capture Interval. The first number is the symbol 0 decision point. There
are X points per symbol (X = points/chip). Therefore, the decision points are at 0, 1 * X, 2 * X,
3 * X, …
3
Chip Magnitude Error
:
Magnitude error trace returns a series of floating point numbers (in percent) that represent
each sample in the magnitude error trace of Capture Interval. The first number is the symbol
0 decision point. There are X points per symbol (X = points/chip). Therefore, the decision
points are at 0, 1 * X, 2 * X, 3 * X, …
4
Chip Phase Error
:
Phase error trace returns a series of floating point numbers (in degrees) that represent each
sample in the phase error trace of Capture Interval. There are X points per symbol (X = points/
chip). Therefore, the decision points are at 0, 1 * X, 2 * X, 3 * X …
5
Corrected Measured Trace
:
Corrected measured trace of Single Slot specified by Meas Offset returns a series of floating
point numbers that alternately represent I and Q pairs of the corrected measured trace. The
magnitude of each I and Q pair are normalized to 1.0. The first number is the in-phase (I)
sample of the symbol 0 decision point and the second is the quadrature-phase (Q) sample of
the symbol 0 decision point. There are X points per symbol (X = points/chip), so the series of
numbers is:
1st number = I of the symbol 0 decision point
2nd number = Q of the symbol 0 decision point
…
(2 * X) + 1th number = I of the symbol 1 decision point
(2 * X) + 2th number = Q of the symbol 1 decision point
…
(2 * X) * Nth + 1 number = I of the symbol N decision point
(2 * X) * Nth + 2 number = Q of the symbol N decision point
1990
W-CDMA & HSPA Measurement Applications Reference
Summary of Contents for E6640A
Page 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Page 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Page 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Page 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Page 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Page 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Page 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Page 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Page 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Page 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Page 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Page 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Page 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...