Operation PSM-500/500L/500LT SCPC Satellite Modem
Page 3-8 PSM-500/500L/500LT - Rev. 0.91
The top gray row represents column headers, which are shown on the LCD display in the upper
left. Items below the header are row parameter names shown in the upper right of the LCD.
Columns are navigated using the left and right arrow keys while rows are navigated using the up
and down arrow keys.
The tables below are organized with general “Rules of Thumb” which aid navigation.
1. The “Status” columns are generally read only, providing status on specific areas of
modem operation.
2. The Modulator and Demodulator matrixes use common column designations. A current
parameter in one area can be immediately accessed in the other by pressing the
appropriate “Mod” or “Dem” button. For example when viewing the Mod Bit Rate, the
Demod Bit Rate is accessed by simply pressing the “Dem” button.
3. The “Alarm” columns existing in all four matrixes and represents the disposition of alarm
information from that source. Therefore the <Dem: Alarm – CXR Lock> sets the
disposition of the Demodulator Carrier Lock Alarm as either None, to Alarm Relay A, to
Alarm Relay B, or to Alarm Relay A & B.
4. The “Test” columns existing in all four matrixes and represents the control and display of
test information for that area. The top entries in the Test column contain tests which can
be enabled or disabled if available. The lower rows represent measurements of
parameters and are read only. Active tests enabled in these columns generate flashing
“Test” LED lamps in appropriate areas.
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