Operating instructions

User Interfaces DMD20/DMD20 LBST Universal Satellite Modem
4-8 TM103 – Rev. 2.8
SCRAMBLER CTRL {ENABLED, DISABLE}
Allows the user to enable or disable scrambler operation.
SAT FRAMING {1/15 (IBS), 1/15 (Async), 96 Kbps (IDR), DVB,
EDMAC, EFAUPC, SCC, EFFICIENT D&I, None}
Used with IDR, IBS, or Asynchronous Interface Only.
Allows the user to select the framing type.
IN-BAND RATE {150, 300, 600, 1200, 2400, 4800, 9600, 19200}
Allows the user to select the rate of in-band data for the
ES to ES, Async overhead channel.
Only displayed when Efficient D&I with Enhanced
Async are selected.
SCC CTL RATIO {1/1, 1/2, 1/3, 1/4, 1/5, 1/6, 1/7},
Allows the user to simulate the framing used by the
Satellite Control Channel Option (Pass Thru Mode only).
The SCC CTL RATIO is the ratio of overhead in-band
data to synchronizing words.
Only displayed when SCC Framing is selected
SCC INBAND RATE {300 to 115200}, when using SCC Framing
Allows the user to request the rate of in-band data for
the overhead channel.
Only displayed when SCC Framing is selected
TERR FRAMING {NONE, 188, 204}, when using DVB Network
Specifications
DATA POLARITY {INV. TERR & BASE, INV. BASEBAND, INV.TERR
DATA, NONE}
Allows the user to invert the Tx Data polarity.
BPSK SYMB PAIR {NORMAL, SWAPPED}
Allows the user to swap the I & Q Channels, when using
BPSK modulation.
ESC OVERHEAD {VOICE X2, DATA 64KBPS}
IDR ESC Channel used for Voice or 64 K data channel.
Only available when IDR Network is selected.
REED-SOLOMON (menu) These selections are visible only when the Reed-
Solomon Option is installed.
ENABLE/DISABLE {ENABLED, DISABLE}
Allows the user to Enable/Disable the Reed-Solomon
Encoder.
RS RATE {Refer to Table 3-1 for standard n/k values}
Displays the currently used n, k Reed-Solomon Codes.
In Closed Net Mode and using the appropriate hardware,
the user may select custom R-S Codes.