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281, 282, 284
Users Manual
4-2
Introduction
This section is a general introduction to the organization and principles of the instrument
and is intended to be read before using the generator for the first time. Detailed operation
is covered in later sections starting with chapter 5, Standard Waveform Operation.
In this Users
Manual front panel keys and sockets are shown in capitals, e.g. CREATE,
SYNC OUT; all soft-key labels, entry fields and messages displayed on the LCD are
shown in the
Courier type-font, e.g. STANDARD WAVEFORMS, sine.
Initial Operation
Switching On
The power switch is located at the bottom left of the front panel.
At power-up the generator displays the installed software revision whilst loading its
waveform
RAM. If an error is encountered the message SYSTEM RAM ERROR,
CHECK BATTERY will be displayed. If this happens, refer to appendix B, W
arnings
and Error Messages.
Loading takes a few seconds, after which the status screen is display
ed, showing the
generator parameters set to their default values, with the MAIN OUT outputs set to off.
The power-up settings may be preset to those at power-down or to any of the stored
settings; chapter 14, System Operations from the Utility Menu explains how to
do this.
You can recall the status screen at any time with the STATUS key; a second press
returns the display
to the previous screen.
On multi-channel instruments the status shown is that
of the channel selected by the
SETUP keys; this is the channel currently enabled for
editing and is always the last
channel selected, whether power has been switched off or not. You can change the basic
generator parameters for the selected channel as described in chapter 5, and you can
switch the output on with the MAIN OUT key; the ON lamp will light to show that
output
is on.
Display Contrast
All parameter settings are displayed on the 20 character x 4 row backlit liquid crystal
display (LCD). The contrast may
vary a little with changes of ambient temperature or
viewing angle but can be optimized for a particular environment by using the front panel
contrast control. Insert a small screwdriver or trimmer tool through the adjustment
aperture marked LCD and rotate the control for optimum contrast.
Keyboard
Pressing the front panel keys displays screens which list parameters or choices relative to
the key pressed. Selections are then
made using the display soft-keys. Numeric values
are changed using either the numeric keys or the rotary control, as described later in this
chapter under Principles of Editing.
The keys are grouped as follows:
• WAVE SELECT keys call screens from which all standard or already defined
arbitrary
waveforms can be selected.
• WAVE EDIT keys call screens from which arbitrary waveforms can be created and
m
odified.
1.888.610.7664 sales@GlobalTestSupply.com
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