Comtech EF Data DMD2401/DMD2401L User Manual
Page 44
DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
User Interfaces
TM065 - Rev. 3.3
4-5
D&I Mode:
(IESS-308)
Data Rates:
n x 64
Framing Type:
1/15 (IBS)
Scrambler Type:
IBS
Spectrum Mask:
Intelsat
Closed Net:
All possible combinations allowed
Mod IF (menu):
Freq (MHz):
{50 – 90 MHz, 100 – 180 MHz, or 950 – 1750 MHz}
Allows the user to enter the Modulator IF Frequency in 1
Hz increments.
Power:
{-5 to –30 dBm}
Allows the user to enter the Transmitter Power Level.
Carrier:
{On, Off, Auto, Vsat, RTS,}
Allows the user to select the Carrier Type. Refer to
Appendix B for further information.
Spectrum Inv:
{Normal, Inverted}
Allows the user to invert the direction of rotation for PSK
Modulation. Normal meets the IESS Specification.
Modulation:
{BPSK, OQPSK, QPSK, 8PSK}
Allows the user to select the modulation type.
Impedance:
{75 , 50 }
Allows the user to select the output impedance.
Mod Data (menu):
Data Rate:
{Refer to Table 1-1 for Data Rates}
Allows the user to set the Data Rate in Bps steps.
Conv Enc:
{VIT 1/2, VIT 3/4, VIT 7/8, Optional SEQ 1/2, Optional
SEQ 3/4, Optional SEQ 7/8, Optional TRE 2/3}
Allows the user to select the Tx Code Rate and Type.
Diff Code:
{On, Off}
Enables or disables the Differential Encoder.
Scrmbl Sel:
{None, V.35-IESS, V.35 CCITT, V.35-EF, IBS, Reed-
Solomon, V.35-EF-RS}
Selects scrambler type.
Scrmbl Ctrl:
{Enable, Disable}
Enables or disables scrambler operation.
Mod Framing:
{1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), None}
Used with IDR, IBS, or Asynchronous Interface Only.
Selects the Frame Type.