Modulation (cdma2000/1xEV-DV)
: Automatic (See cdma2000/1xEV-DV Standard Setups/Presets Table.)
of the Despread Channel specifies how the VSA detects the modulation format for the forward link F-PDCH channel (Walsh code length 32). Either or detection mode can be selected. uses the internal algorithm to determine the modulation type. However, if the VSA is not detecting the correct format, you can use mode. This mode forces the VSA to use the modulation format specified in the parameter text box. The modulation formats are QPSK Quadrature phase shift keying, 8PSK, or 16QAM. The manual modulation format, which is used for Despread Code Channel measurements, may be different from the detected format used for Composite measurements.
This feature is only available when Enable 1xEV DV analysis and Forward Direction is selected and the Despread Channel - is set to 32 (38.4 ksym).
Auto Detect: The internal algorithm determines the modulation format for the F PDCH channel.
Manual: Allows you to specify the F PDCH channel modulation format:
- - Select when modulation scheme is QPSK.
- - Select when modulation scheme is 8PSK.
- - Select when modulation scheme is 16QAM.
only applies to Despread Channel trace data measurement results for the F-PDCH channel (Walsh code length 32).
See Also
