Agilent Technologies E4428C, User Manual

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100 Chapter 4
Basic Digital Operation
Arbitrary (ARB) Waveform File Headers
Dual ARB Player Waveform Sequence File Headers
When you create a waveform sequence (described on page 108 ), the ESG automatically creates a default
file header, which takes priority over the headers for the waveform segments that compose the waveform
sequence. During a waveform sequence playback, the waveform segment headers are ignored (except to
verify that all required options are installed). When you store the waveform sequence, its file header is
stored with it.
Follow the procedure “Creating a Waveform Sequence” on page 108 to generate a waveform sequence file
header.
Editing and Viewing File Headers in the Dual ARB Player
Before you can edit a file header in the dual ARB player, the associated waveform file must reside in volatile
waveform memory (WFM1). In addition, you cannot edit the
AUTOGEN_WAVEFORM
file header in the dual
ARB player if the
AUTOGEN_WAVEFORM
file is currently being played by another modulation format such
as Custom real-time. Turn off the modulation format then play the
AUTOGEN_WAVEFORM
file using the dual
ARB player. You can then modify the file header.
If you want to edit a file header for a waveform file that resides in non-volatile memory (NVWFM), move it
to WFM1 and then play it. Refer to
“Loading Waveform Segments from Non-Volatile Memory” on page 113
for information on loading files from NVWFM.
Edits to file headers can only be performed when the waveform file is playing. After making changes to the
signal generator settings and parameters, you can apply these new settings to the waveform by pressing the
Save Setup To Header
softkey and then reselecting the waveform file for playback. When you do this, you will
see the values from the
Saved Header Settings
column overwrite the settings in the
Current Inst.
Settings
column. For information on selecting and playing waveform files, see “Playing a Waveform
Sequence” on page 109 .
NOTE
Edits to file headers can only be performed when the waveform file is playing.
Modifying File Header Information
All file header descriptions listed in the procedure “Modifying Header Information” on page 94 are valid in
the dual ARB player. The following procedure selects a waveform file, accesses its file header, and then
refers you back to the aforementioned procedure to perform the edits. This procedure assumes there is an a
user-defined waveform file or an
AUTOGEN_WAVEFORM
file in WFM1. For information on creating the
AUTOGEN_WAVEFORM
file and associated file header, refer to “Creating a File Header” on page 92 .
1. Press
Mode
>
Dual ARB
>
Select Waveform
.
2. Using the arrow keys, highlight the waveform file that needs its file header edited.