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Operation
PSM-500/500L/500LT SCPC Satellite Modem
3.1.2.2 Front Panel Keypad
The front panel keypad consists of three areas:
First, is a 10-key numeric entry with 5 additional keys. Two keys provide for a "+/-" (change sign)
and "." (decimal point) function, while three more on the far right provide "Edit", "Clear" and
"Enter". The "Enter" key on the lower right is normally blue while the rest of the numeric keypad
keys are gray. This allows easy identification of the Enter key.
The second area is a set of "Arrow" or "Cursor" keys used to navigate the parameter currently
being monitored or controlled. During entry, the cursor keys allow moving a cursor to individual
digits of a numerical entry or scrolling through the available options of a selection entry. The
arrow keys are also in blue.
The third area is the four selection keys previously discussed with the LCD display. They allow
selecting which functional area or "sheet" of the display matrix is currently in use. The four
functional buttons represent the Unit, Modulator, Demodulator and Interface.
Page 3-2
PSM-500/500L/500LT - Rev. 0.91
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