LeCroy PXA125, User Manual

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User Manual PXA125
ArbConnection 3-69
There are three additional buttons at the right top corner of the
Modulation Panel. You can close the Modulation Panel by clicking on
the Close key, or return to the main panel and leave the Modulation
Panel in the background if you click on the “To Main Panel” key. The
“To FM Composer” button will invoke the FM composer program that
will enable you to create and edit user-defined waveforms that will be
used as modulating waveforms. The FM Composer program is
described in greater details later in this chapter.
The Utility Panel
The Utility panel, as shown in Figure 3-10, is invoked either by
pressing the UTIL button or “To Utility Panel” button on the Main
Panel. The Utility panel provides access to general instrument
controls that are not directly related to waveform generation. Through
this panel you can control multiple instruments and/or multiple
channels. If you made programming errors, you can use this panel to
clear the error queue, or reset the PXA125 all together. The functional
groups in the Utility are described below.
Multi-Instruments
Synchronization Control
The Multi-Instrument Sync Control group lets you synchronize
between multiple instruments and program phase offsets between
instruments. Phase offset is applied between the leading edges of the
two instruments and is given in units of waveform points.
To adjust the Ph. Offset parameter, click on the button below
parameter. The LED next to the Ph. Offset turns on. The offset value
is displayed on the digital display. You can use the dial, keyboard, or
the [
↑
] [
↓
] keys to adjust the readout to the required setting. After you
modify the reading, press Execute to update the PXA125 with the new
reading. Note that after changing phase between instruments, you
must re-activate the synchronization between the instruments, as
explained below.
Set Configuration – The Set Configuration button provides access to
a configuration table as shown in Figure 3-11. Use this table to
configure which of the instruments will be master and which will be
slaved to this master. The example in Figure 3-11 shows 5
instruments in the chassis of which the instrument in slot 4 was
selected as master and slots 5 and 6 were programmed as slaves.
There are some basic rules when selecting master and slave units as
summarized in the following:
1. You must have minimum of two instruments in your chassis to
be able to open and access the Multi-Instrument
Synchronization Panel.
2. Actual slot location is critical for synchronizing instruments.
Therefore, before you start synchronizing instrument, use the