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Operation
TXD_FLT
RXD_FLT
BUF_SIZE
BUF_CNTR
READ_ERR
3–32
SDM-309B Satellite Modem
Transmit Data Fault. This configuration
function is used to select a Transmit Interface
fault monitor of AIS, Data, or none. When AIS
(Alarm Indication Signal) is selected the
TX_INTF (Transmit Interface) fault "Data/AIS"
is monitoring a fault condition of all 1's from
customer data input to the modem. When
Data_Flt is selected, the TX_INTF fault
"Data/AIS" is monitoring a fault condition of all
1's or all 0's. This is referred to as a data
stable condition which means that the data is
not transitioning. When None is selected, the
TX_INTF fault "Data/AIS" is not activated.
On entry the current TX Data fault that is
being monitored is displayed with the flashing
cursor on the first character. Use the arrow
keys to select Data, AIS, or None. Press the
"ENTER" key to execute the change.
Receive Data Fault. This configuration
function is used to select a Receive Interface
fault monitor of AIS, Data, or None. The data
monitored for Receive Data is coming from
the Satellite. Refer to TXD_FLT for a
description of the function choices.
On entry the current RX Data fault that is
being monitored is displayed with the flashing
cursor on the first character. Use the arrow
keys to select Data, AIS, or None. Press the
"ENTER" key to execute the change.
This configuration function is used to set the
size of the plesiochronous buffer.
On entry the current plesiochronous buffer
length is displayed. Use the up and down
arrow keys to select the desired buffer size.
You may select from 1 to 32 seconds. Press
the "ENTER" key to execute the change.
This configuration function is used to center
the plesiochronous buffer. Press the "ENTER"
key twice to center the plesiochronous buffer.
This configuration is used to select the read
error function mode. Frame or 2047 errors
may be selected.
On entry the current read error mode is
displayed. Use the arrow keys to select
"2047" errors or "FRAME" errors as desired.
Press the "ENTER" key to display and monitor
the selected errors. To exit the read error
mode press the "CLEAR" key.
MN/U-SDM309B Rev. #
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