Comtech EF Data DMD2401/DMD2401L User Manual
Page 48
DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
User Interfaces
TM065 - Rev. 3.3
4-9
IDR OH Type:
{Voice, 64Kbit}
Available with 96 Kbps (IDR) Framing.
Symbol Pair:
{Normal, Swapped}
Available in BPSK Modulation.
ReedSolomon (menu):
DmdRS Enable:
{Enable Disable}
Enables or disables the Reed-Solomon Decoder
DmdRS Codes:
{Any valid n/k values can be entered (refer to
Appendix A)}
Displays the currently used n, and k Reed-Solomon
Codes. In Closed Net Mode, custom RS Codes may be
selected.
DmdRS Depth:
{4, 8}
Displays the currently used Reed-Solomon Interleaver
Depth. In Closed Net Mode, a depth of 4 or 8 may be
selected.
4.2.4 Interface Menu Options and Parameters
General (menu):
EXC Clk Freq:
{1.0, 1.544, 2.0, 2.048, 2.5, 5.0, 9.0, 10.0}
Displays the external clock frequency in MHz.
Freq Ref Src:
{Internal, External}
Allows the user to select between an internal and
external frequency source.
Ext. Ref Freq:
{1 – 10 MHz, 1 MHz steps}
Allows the user to enter the external reference
frequency.
Intf Type:
Displays the optional interface type installed.
Tx Setup (menu):
Tx Ckt ID:
Allows the user entry of a Tx Circuit Identifier. Circuits
can be given up to an 11 character alphanumeric identity
such as LINK1.
Tx Clock:
{SCTE (Ext), SCT (Int)}
Selects the clock source.
Tx Clk Polarity:
{Normal, Auto, Inverted}
Selects the Tx Clock Polarity.
SCT Source:
{Internal, Ext. BNC, SCR}
Selects the Tx SCT Source.
Tx Terr Intf:
{RS-422, V.35, RS-232}
Allows the user to select the Transmit Interface Type.
Not available when G.703 Interface Type is installed.