Datum Systems PSM-500, Инструкция по установке и эксплуатации

Страница: 87 / 124

PSM-500/500L/500LT SCPC Satellite Modem Operation
PSM-500/500L/500LT - Rev. 0.91
Page 3-27
•
”SnIP FAILURE”, Meaning no communications from SnIP card to modem processor.
•
“SnIP HARD RESET”, Meaning that the SnIP is in process of resetting its parameters.
•
“SnIP LIMIT ALARM”, Meaning that the SnIP is not able to process data.
The front panel controls for the SDMS are normally only used for basic initial setup. When more
sophisticated software is loaded into the SDMS control is usually via the Ethernet connection.
3.3 Terminal Mode Control
The PSM-500 Terminal Mode Control allows the use of an external terminal or computer to
monitor and control the modem from a full screen interactive presentation operated by the
modem itself. No external software is required other than VT100 terminal emulation software
(e.g. “Procomm” or “HyperTerminal”) for a computer when used as a terminal. The control port is
normally used as an RS–232 connection to the terminal device. The RS–232 operating
parameters can be set using the modem front panel and stored in EEPROM for future use.
The USB connection at J10 cannot be used for Terminal Mode Control. To connect to the modem
from a computer’s USB port, use a USB to serial adaptor connected to the DB9 at J6.
3.3.1 Modem Setup for Terminal Mode
Terminal mode communications and protocol is set from the front panel control by setting the
<Unit: Remote – Protocol> parameter to “VT100” (Option 0), and then setting the <Unit:
Remote – Port> , <Unit: Remote – Rate> and <Unit: Remote – Format> parameters as
desired. Then a “VT100” protocol terminal is connected to connector J6. All operating software
for the terminal mode is contained within the PSM-500 modem internal control software.
A “break” signal on the communications line, pressing “Control R” on the terminal or power on of
the modem will initiate full screen terminal mode printing and redraw the full screen. The terminal
mode displays the present status of all user parameters controlled and read by the processor,
and offers a menu allowing change to any controlled parameter.
A single terminal mode screen displays one full column of information from any one of the four
matrixes, being Unit, Modulator, Demodulator and Interface. The number of terminal mode
display screens possible is equal to the total number of columns in the four matrixes (24 at
current count). Any possible screen can be accessed by 2 key presses from any other screen.
The 2 key presses are:
1. A first digit representing the functional area:
a) 0 = Unit
b) 1 = Modulator
c) 2 = Demodulator
d) 3 = Test
2. A second digit representing the column number. (0 to 9 for the Unit, 0 to 5 for Modulator
and Demodulator or 0 to 4 for the Interface).
The resulting screen display shows all items present in that column of the matrix.
For example the basic Unit Status screen shown below lists the status items from the Unit Status
column of the Unit Matrix. Notice that at the bottom of the screen is a prompt inviting you to select
from one of the 4 items as the first step to change to another screen.