Comtech EF Data DMD2401/DMD2401L User Manual
Page 46
DMD2401/DMD2401L/DMD2401 IBS/IDR Satellite Modem
User Interfaces
TM065 - Rev. 3.3
4-7
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
Demod 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.
Spectrum Inv:
{Normal, Inverted}
Inverts the direction of rotation for PSK modulation.
Normal meets the IESS Specification.
Demodulation:
{BPSK, OQPSK, QPSK, 8PSK}
Allows the user to select the demodulation type.
Swp Bounds:
{1 – 42 kHz}
Sets the acquisition range for the demodulator.
Input Limit:
{20 – 90 dBm}
Impedance:
{75 , 50 }
Allows the user to select the output impedance.
Demod Data (menu):
Data Rate:
{Refer to Table 1-1 for Data Rates}
Allows the user to set the Data Rate in Bps steps.
Conv Dec:
{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 Rx Code Rate and Type.
Diff Decode:
{On, Off}
Enables or disables the differential decoder.
Descrmbl Sel:
{None, V.35-IESS, V.35 CCITT, V.35-EF, IBS, Reed-
Solomon, V.35-EF-RS}
Selects the descrambler type.
Dscrmbl Ctrl:
{Enable, Disable}
Enables or disables descrambler operation.
Dmd Framing:
{1/15 (Async), 1/15 (IBS), 96 Kbps (IDR), None}
Used with IDR, IBS, or Asynchronous Interface Only.
Selects the Frame Type.
Data Invert:
{Normal, Inverted}