Comtech EF Data KST-12025 - Manual (Page 89)

KST-12025 Ku-Band Satellite Terminal Theory of Operation
Rev. 1 5–3
5.1.1 EEPROM Memory
EEPROM memory on the M&C module allows it to retain configuration information for
at least one year without power. 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 EEPROM
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-1225 can be remotely controlled and monitored via an EIA-
485 or EIA-232-C communications link.
The EIA-485 interface makes it possible to operate 255 terminals on a common
communications link.
The EIA-232-C 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:
2
1 9 1 5
1 6
E IA -48 5 E IA -23 2-C
JP 3
S H O R TIN G
S H U N T
S H O W N S T R A P P E D
FO R E IA -4 85
Figure 5-2. M&C Jumper Placement at JP3