Comtech EF Data SDM-100A - Manual (Page 191)

SDM-100A Satellite Modem Options
Rev. 0 B–9
B.1.3 Front Panel Operation
The following sections describe the additional front panel operations that are specific to
the ASYNC interface. These options are shown in the menu tables in Chapter 3, along
with the standard menu windows.
B.1.3.1 Interface Configuration
Baseband
Loopback This option turns the baseband loopback option on or off.
Buffer Size This option allows the user to select the buffer size in 32-bit increments,
from 32 to 8192.
Buffer Center This option centers the Doppler buffer on command.
ASYNC ON/OFF This option turns the ASYNC overhead on or off.
Loop Timing This option puts the modem in a loop timing configuration. The buffer
clock and the ST pin on the interface are forced to the RX clock.
TX Baud This option programs the TX UART to the desired baud rate for the
ASYNC channel.
RX Baud This option programs the RX UART to the desired baud rate for the
ASYNC channel.
TX Length This option programs the TX UART to the desired number of data bits.
RX Length This option programs the RX UART to the desired number of data bits.
TX Parity This option programs the TX UART for the desired parity.
RX Parity This option programs the RX UART for the desired parity.
TX STP This option programs the TX UART to output the desired number of stop
bits.
Local AUPC This option turns the local modem’s AUPC on or off.
Nominal Power This option programs the nominal power set point for AUPC.
Minimum Power This option programs the minimum power set point for AUPC.
Maximum Power This option programs the maximum power set point for AUPC.
Target Noise This option programs the target noise. The target noise can range from
4.0 to 16.0 dB, in 0.1 dB increments.
Tracking Rate This option programs the maximum tracking rate. The maximum tracking
rate can range from 0.5 to 6.0 dBm per minute.
Local CL This option programs the action taken by the local modem if Carrier Loss
is detected. The local CL can be programmed to maximum, nominal, or
hold.
Remote CL This option programs the action taken by the remote modem if Carrier
Loss is detected. The remote CL can be programmed to maximum,
nominal, or hold.