Giga-tronics 2508A, Operation Manual

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Chapter 2: Front Panel Operation
58 2500A Series Operation Manual, 34172 Revision C, March 2008
2.4.2.2.1 Soft Key State Toggle
To modify a parameter whose only available selections are On and Off using this method, select the
menu item that is associated with the desired paramter by pressing the adjacent soft key. Pressing the soft
key with the menu item selected will toggle the state of the menu item.
2.4.2.2.2 Direct Entry Using Numeric Keypad
To modify a parameter using this method, select the menu item that is associated with the desired param-
eter, enter the new value using the numbered buttons in the numeric keypad, then press the appropriate
Units button to update the parameter to the new setting.
To enter negative values, press the BK/- button before entering the first digit of the new value. After the
first digit of the new entry has been entered, the BK/- button performs a backspace function, to delete
previously entered digits.
2.4.2.2.3 Step Up/Step Down Buttons
This method can be used to modify numeric parameters, as well as parameters that toggle between
defined states (for example, the On/Off states of modulation parameters).
To modify a parameter using this method, select the menu item that is associated with the desired param-
eter, then press the Step Up button or Step Down button to increase or decrease the selected parameter by
the specified step size.
The step size determines the resolution by which the parameter will be increased or decreased with each
press of the Step Up or Step Down buttons. Refer to “Step Size”, below, for information on how to mod-
ify the step size.
2.4.2.2.4 Rotary Knob
This method can be used to modify numeric parameters, as well as some parameters that toggle between
defined states.
To modify a parameter using this method, select the menu item, then rotate the knob clockwise or
counter clockwise to increase or decrease the value of the parameter.
The parameter will be modified according to the programmed step size.
2.4.2.2.5 Step Size
The step size for a specific parameter determines the resolution by which that parameter will change
when modified using either the Step Up/Down buttons or rotary knob. The step size for the selected
parameter is displayed at the bottom of the display if an operator error message is not being displayed.