This selection sets the instrument to the p/8 D8PSK) "Enhanced Data for Global Evolution" digital demodulation format. Use the same process to demodulate EDGE as other digital demodulation formats.
(3adds a new filter: . Also two new digital demod error data results were added to the symbol table: and .
Use the VSA's standard preset feature to automatically configure the measurement parameters: Select the .
When using
, note the following:Because ISI (inter-symbol interference), symbol locations in the vector and constellation diagrams should appear random. However, at one (the value set by the EDGE standard setup) the VSA removes the effects of ISI so a clean vector diagram can be viewed. Above one , the VSA does not remove the effects of ISI.
signals incorporate rotation and the EDGE filter introducesThe PSK signals. One of two filters may be used depending on the selection of the measured filter.
filter is available as the reference filter and is used for demodulating EDGEThe BT (Bandwidth Time Product) of the reference filter is fixed. The value of BT does not affect this filter.
The kHz, 6 dB bandwidth, as defined by ETSI (European Telecommunications Standard Institute) GSM 05.05.
filter is available as the measured filter and is used for demodulating EDGE PSK signals. This filter is a windowed, raised-cosine filter that has an approximate 180The BT (Bandwidth Time Product) of the
filter is fixed. The value of BT does not affect this filter.The EVM) below which 95% of the individual symbol EVMs occur.
demodulation format adds two new error data results to the symbol table: and . is the mean (average) of the peak EVMs - one per measurement (it is a mean of the peaks, not a peak of the peaks). is the error-vector-magnitude (The Equalization Filter is only available when the
is set to .To learn how the VSA demodulates EDGE signals, see Digital Demodulation.
See Also
Available Digital Demodulation Formats (Digital Demod)
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