To Create A Contiguous Waterfall Or Spectrogram Display - Agilent Technologies 89410A Operator's Manual

Creating Arbitrary Waveforms

To create a contiguous waterfall or spectrogram display

Contiguous traces are needed when you use a waterfall or spectrogram
display to generate an arbitrary-source waveform.
spectrogram displays to generate arbitrary waveforms that contain more
than 4096 samples of complex data or 8192 samples of real data.
1.
Prepare time-capture RAM for your signal:
Press [
Instrument Mode
Check [ ] to verify that your signal will fit in time-capture RAM.
buffer length
Increase [ ] if necessary.
buffer length
2.
Fill time-capture RAM with your signal:
Press [ ].
fill buffer
3.
Set the overlap to 0%.
Press [ ], [
Time ovlp: avg off 0 %
4.
Select time-domain data.
Press [
Measurement Data
5.
Select a waterfall or spectrogram display and set the buffer depth to 20.
Press [ ], [
Display waterfall setup
Press [ ].
buffer depth 20
6.
Start the measurement:
Press [ ].
Meas Restart
Storing your signal in time-capture RAM and playing it back with 0%
overlap ensures that the traces in a waterfall or spectrogram display are
contiguous. To use waterfall or spectrogram data to drive the arbitrary
source, you need contiguous traces to eliminate phase discontinuities in the
arbitrary-source waveform. Make sure to display your data in the time
domain since the arbitrary source requires time-domain data.
This procedure uses a buffer depth of 20 to accommodate all procedures in
this chapter. Be sure to set the buffer depth according to your
measurement needs.
6-10
], [ .
capture setup ]
].
], [ ].
main time
], [ ].
waterfall on
You use waterfall or