To Measure Signal Paths - Agilent Technologies 89410A Operator's Manual

Using Adaptive Equalization (Options AYA and AYH)

To measure signal paths

This task shows you how to use the equalization filter's impulse response
to identify and measure paths in a multi-path signal.
multi-path signal on the Signals Disk and is a continuation of the previous
task.
1.
Perform the previous task.
2.
Configure the display to show the impulse response of the equalization filter in
a single grid:
Press [ ], [ ], [
B Display
3.
Change the x-axis units to seconds:
Press [ ], [
Ref Lvl/Scale
4.
Display bars at the symbol locations:
Press [ ], [
Data Format
5.
Move the marker to the peak impulse (this is the main signal path):
Press [ ], [ ].
Shift Marker
The marker readout shows the main impulse at 0 seconds with
approximately 0 dB of loss.
6.
Move the marker to the next peak (this is the second signal path):
Press [ ], [
Marker Search
The marker readout shows the second signal path at
approximately 15 dB of loss relative to the main impulse (the strongest
path).
7.
Move the marker to the next peak (this is the third signal path):
Press [ ] again.
next peak
The marker readout shows the third signal path at
approximately 20 dB of loss.
The impulse response in this example shows several peaks. The three
highest peaks correspond to the main signal path plus two multi-path
signals. The remaining peaks correspond to the two multi-path signals, as
described in the next paragraph.
12-8
].
single grid
], [ ], [
X & Y units setup X units
], [
more format setup symbol bars
].
next peak
This task uses the
].
s
].
− 800 ns
with
3 µ s
with