Introduction
Giga-tronics 2500B Series Microwave Signal Generators
Page 12
Operation Manual, Part Number 34737, Rev C, June 30, 2011
Table 8: 2500B Front Panel
2500B Front Panel
Name
Description
POWER button
Puts the 2500B into one of two states:
STANDBY; power is applied to the internal timebase oscillator. This is to maintain
timebase stability when the 2500B is not in use.
ON; all functions of the 2500B are available for use.
NOTE:
To ensure specified performance, allow the 2500B to remain ON or in
STANDBY for at least 30 minutes prior to using the instrument.
POWER indicator
BLUE indicates the instrument is ON and all functions are available.
AMBER indicates the instrument is in STANDBY mode.
LOCAL button
If in REMOTE mode, pressing this button puts the instrument into LOCAL mode.
If the unit is in LOCAL mode: pressing this button displays menus that allow you
to choose the remote command language used during remote operation.
PRESET button
Pressing the PRESET button momentarily presets instrument settings to factory
default values, but does not affect system memory locations, display contrast, or
the GPIB address.
Pressing and holding the PRESET button while the unit is powering up initializes
NVRAM, which includes presetting instrument settings to factory default values
as well as initializing all ten system memory locations, the display contrast, and
the GPIB address.
Display
Displays current instrument settings, and menus for modifying the settings.
The
active display
is the group of instrument settings and associated menu items
that are currently displayed
.
Softkeys
Selects the menu items adjacent to them in the display for modification.
Numeric Keypad
Use for entering numeric settings for generator functions.
STEP SIZE button
Selects and allows editing of the step size by the Step Up/Step Down buttons, rotary
knob, or numeric keypad. To change a step size, see Table 11 on page 18.
RF ON button
Activates RF power output from the 2500B.
Step up/down
buttons
Increases or decreases the selected parameter in the display by the amount specified
by the step size.
Rotary knob
Adjusts the parameter that is selected in the display. When a maximum or minimum
limit is reached, a message appears at the bottom of the display.
Unleveled indicator
When this indicator illuminates, it means that the power output cannot be increased
any further, even though the power output displayed on the front panel may show an
increase. The unleveled point varies with frequency.
External Reference
(Ext Ref) Indicator
Illuminated when the 2500B is operating with an external reference applied.
