Ametek 7280 Instruction Manual page 42

Chapter 4, FRONT AND REAR PANELS
4-4
Step 3 Press the or
As an example of this operation, suppose that the oscillator frequency is 1000.000 Hz
and it is required to change it to 1001.000 Hz. Simultaneously press both
keys adjacent to the oscillator frequency display. Move the cursor, by repeated
double-key presses, until it is under the digit that is to be changed, in this case the
zero to the left of the decimal point. Then press the
frequency by 1 Hz. The cursor will disappear as soon as the frequency is adjusted but
its position remains active until changed (see figure 4-4).
The double-key press action can also be performed with one finger by firmly
pressing the center of the
The active cursor can be used to set any particular digit. For example, if you only
want to adjust the reference phase in 1 degree steps leave the cursor over the first
digit to the left of the decimal point of the reference phase value.
Auto Repeat
If a or key adjacent to a control is pressed and held, then its action is
automatically repeated such that the control setting is incremented or decremented at
a rate approximately ten times faster than can be achieved by repeated manual key-
presses.
Function 2: To Select a Menu or Sub-Menu
When the screen adjacent to a
either the or key selects that menu.
Function 3: To Execute a Pre-Programmed Function
When the screen adjacent to a
such as Auto-Measure or start frequency sweep, then pressing either the
key to change the digit to the required value.
Figure 4-3, Active Cursor Activation
Figure 4-4, Active Cursor Operation
key rocker which will deform to press both keys.
key pair displays a menu name, then pressing
key pair displays a pre-programmed function,
and
key to increment the
or