To use polar markers
This task shows you how to select the polar-marker format (magnitude and
phase or real and imaginary) and polar-marker units (dBm, Watts, or volts).
This task is a continuation of the previous task.
1. Select result coordinate power calculation:
Press [
Instrument Mode
], [demodulation setup], [more], [
normalize off]
.
2. Select the desired polar marker format:
Press [
Marker
], [
polar mkr setup
], [
format mag & phase
], [
W
].
3. Press [
Auto Scale
]
4. Rotate the knob to examine time points along the trajectory.
5. Select a different number of points per symbol:
Press [
Time
], [
points/symbol
], 10, [
enter
].
The vector diagram shows all time points on the trajectories between
decision points. More points per symbol creates a smoother vector
diagram. If you want to examine the marker value only at the decision
points you may select a constellation diagram. The cross-hairs show the
ideal detection-decision points (for details, see online help for [
Data Format]
[
more format setup][ideal state]).
In a vector diagram, the marker allows you to track all time points.
The measurement values reflect your
choice of polar marker format and
whether the measurement reflects
normalized or power units
Analyzing Digitally Demodulated Signals (Options AYA and AYH)
10 - 4
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