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5 reed-solomon (menu) – Comtech EF Data DMD-2050E User Manual

Page 129

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DMD2050E Universal Satellite Modem

User Interfaces

MN-DMD2050E Revision 2

4–17

DATA MENU
SCRAMBLER SEL

{NONE, V.35-IESS, V.35 CITT, V.35 EF, IBS
w/Optional Framing and optional Reed-
Solomon, Reed-Solomon Scrambler
w/Optional Framing, CCITT, V.35FC, OM-73,
V.35EF_RS, TPC SCRAMBLER (Turbo
Codec), DVB, EDMAC, EBEM}

Select the descrambler type.

SCRAMBLER CTRL {ENABLED, DISABLE}

Enable or disable the descrambler
operation.

SAT FRAMING

{1/15 (IBS), 1/15 (Async), 96 Kbps (IDR),
EDMAC, EFAUPC, SCC, EBEM, None}

Select the Framing Type.

TERR FRAMING

{NONE, 188, 204}

DVB Only

DATA POLARITY

{INV. TERR & BASE, INV. BASEBAND,
INV.TERR DATA, NONE}

Invert the Rx Data polarity.

SYMBOL PAIR

{NONE, SWAPPED}

BPSK Mode Only
Swap the I & Q Channels.

ESC OVERHEAD

{VOICE X2, DATA 64KBPS}

IDR ESC Channel is used for Voice or 64
K data channel.

See also:

4.4.1.4.1 EBEM NETWORK SPEC Parameters

4.4.1.4.2 SCC FRAMING Parameters

4.4.2.5

REED-SOLOMON (menu)

IMPORTANT
When the Reed-Solomon option is installed, these parameters are available.

ENABLE/DISABLE

{ENABLED, DISABLE}

Enable or disable the Reed-Solomon decoder.

RS RATE

{Refer to Table 3-1 for valid
n/k values}

Displays the currently used n, k Reed-Solomon Codes. In
Closed Net Mode, you can select custom R-S Codes.

INTERLVR DEPTH

{4, 8, 12}

Select the Reed-Solomon interleaver depth. In Closed Net
Mode, you can select a depth of 4 or 8.

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