Atec JDSU-JD748A-JD788A - Manual (Page 16)

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Modulation Analysis
Power vs. Time (Frame) verifies, with LTE-TDD, WiMAX,
and GSM, that the transmitter output power has the correct
amplitude, shape, and timing according to the standards.
Constellation provides with multimedia broadcast/multi-
cast services (MBMS*), modulation quality metrics (EVM)
for data and/or control channels, at its corresponding modu-
lation scheme, such as GMSK, QPSK, 16 QAM and 64 QAM.
Code Domain measures with CDMA/EVDO and WCDMA/
HSPA+, spread code channel power levels across the RF chan-
nel, normalized to total power.
Code domain power (CDP) shows the signal’s physical chan-
nels indicating the various spread factors using different colors
to easily differentiate the traffic types carried within the signal.
Code Power provides the power data for an individual code
channel and layer for a specified time slot. It displays the power
of the 16 codes of a specified signal.
Code Error shows the power data and error data for an individ-
ual code channel and layer for a specified time simultaneously.
Relative Code Domain Error** is computed by projecting
the error vector onto the code domain at a specified spreading
factor.
*Only available for the JD748A with MBMS enabled.
**Only available for the JD748A.