Agilent Technologies 89410A Operator's Manual page 99

9.
Display the ideal vector diagram in trace C and compare it to trace A:
Press [ ], [
C Measurement Data
Press [ ], [
Data Format
Press [
more format setup
Press ] [ ], [
Auto Scale].
[Shift A
Selecting the EDGE standard setup automatically sets the demodulation
format, frequency span, symbol rate, filtering, and several other
demodulation parameters (for a complete list, see help for [
Because EDGE signals incorporate rotation and the EDGE filter introduces
ISI (inter-symbol interference), symbol locations in the vector and
constellation diagrams should appear random. However, at one
point/symbol (the value set by the EDGE standard setup) the analyzer
removes the effects of ISI so you can view a "clean" vector diagram.
Above one point/symbol, the analyzer does not remove the effects of ISI.
10.
Set points/symbol to 2 to view the effects of ISI on the vector diagram:
Press [ ], [
A], [Display
Press [ ], [
Time points/symbol
Quad display showing individual IQ measured and IQ reference vector diagrams, the
error vector trace, and the symbol table (at 1 point/symbol). Single display showing
same vector diagram, but at 2 points per symbol. At 1 point/symbol, the analyzer
removes the effects of ISI so you can view a "clean" vector diagram. Above 1
point/symbol, the effects of ISI are not removed.
], [ ]
IQ reference time
]
polar IQ vector
], [ ]
symbol dots
]
single grid
], , [ ].
2
enter
Using Digital Demodulation (Opt. AYA)
]).
standard setups
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