Comtech EF Data KST-12000 - Manual (Page 87)

KST-12000 Ku-Band Satellite Terminal Revision 4
Theory of Operation MN/KST12000.IOM
5.1.1 EEPROM Memory
EEPROM memory on the M&C module allows it to retain configuration information
without prime power for at least one year. Should the terminal be powered down, the
following sequence is carried out by the M&C microcontroller:
1. When power is applied to the M&C, the microcontroller checks the EEPROPM
memory Random Access Memory (RAM) to see if valid data has been retained.
If valid data has been retained, the terminal is reconfigured to the configuration
maintained in EEPROM.
2. If EEPROM memory fails the valid data test, a default configuration from Read
Only Memory (ROM) is loaded into the system.
5.1.2 Remote Interface
The functions of the RFT-1200 can be remotely controlled and monitored via an RS-485
or RS-232 communications link.
The RS-485 interface makes it possible to operate 255 terminals on a common
communications link.
The RS-232 interface is used to communicate with a single terminal.
The M&C module must be hardware configured to one of the two interfaces.
Refer to Figure 5-2 for jumper placement at JP3:
Figure 5-2. M&C Jumper Placement at JP3
5–3