PSM-500/500L/500LT SCPC Satellite Modem
Installation
PSM-500/500L/500LT - Rev. 0.91
Page 2-13
and down arrow keys to arrive at the “Level” parameter. This is shown by convention in this
manual as
<Mod: IF – Level>
2.5.1 Parameter Setup
Each individual item that may be read or set is referred to as a “parameter”. Parameters are
arranged in a matrix of rows and columns. To set any parameter:
1. Select the functional matrix by choosing one of the four function keys; Unit, Mod, Dem
and Int’f.
2. Select the parameter to be set using the four arrow keys to the right of the LCD display.
The Left and right arrow keys control the column of the matrix and is shown in the upper
left position of the LCD display. The up and down arrow keys control the row of the matrix
and is shown in the upper right of the LCD display. Then
3. Press the “Edit” key to indicate that a new entry is desired (If the “Quick” keyboard entry
is enabled this step may be skipped), next
4. Set the parameter via the numeric keypad, and
5. Finalize the data entry using the “Enter” key.
The current input can be canceled by pressing the “Clear” key at any time before pressing
“Enter”.
When the entry involves selection of one of several choices; this is accomplished by either:
1. Use the up and down arrow keys to scroll though the available options, pressing “Enter”
when the desired option is displayed. When scrolling though the available options the
current setting is denoted by an arrow in the left column position, or
2. Pressing an option number selection (0 to max. where max. may be 1 to 8), then
pressing the “Enter” key. This method is faster when the option scheme becomes more
familiar. For instance, all options that can be enabled or disabled use “1” to enable and
“0” to disable. Note that the “yes” and “no” below the 1 and 0 key aid this convention.
Following a valid input, the modem will place the new setting into the nonvolatile EEPROM
making it available immediately and also automatically the next time the unit is powered on.
2.6 Modem Terminal Mode Control
The modem can be interactively monitored and controlled in the VT100 Terminal mode, with a full
screen presentation of current settings and status. Programming is accomplished by selecting the
item to be modified and pressing the terminal key of the option letter “A” through “Z”. For
example, to change the transmit data rate, press the terminal's “A” key (upper case is not
necessary for letters). The modem will respond by presenting the options available and
requesting input. Two types of input may be requested. If the input is multiple choice, the desired
choice is selected by pressing the indicated number key. This input type does not require
pressing the “Enter” or carriage return key. The other possible input type requires a numerical
input (such as entering a frequency or data rate). This type of input is followed by pressing the
“Enter” or carriage return key. An input can be aborted at any time by pressing the “TAB” key.
Invalid input keys are signaled by a beep or bell signal from the terminal. Note that the “ESC” key
is not used to escape or cancel an input because the common ANSI and VT100 terminal control
sequences use the escape character to flag start of sequence.
Following a valid input, the modem will place the new setting into the nonvolatile EEPROM
making it available not only immediately but also automatically the next time the unit is powered
up.
