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Comtech EF Data OM20 User Manual

Page 94

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OM20 Universal Outdoor Modem

Web Browser/Remote Protocol

MN-OM20– Revision 5

6–20



Differential Coding:

{ENABLED, DISABLE}

Allows the user to enable or disable the Differential Encoder.
Having the encoder enabled ensures proper phase lock. May not
be adjustable in some modes.



Scrambler Selection:

{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, DVB, EDMAC}

Allows the user to select the descrambler type.


Scrambler Control:

{ENABLED, DISABLE}

Allows the user to enable or disable scrambler operation.


Satellite Framing:

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

Used with IDR, IBS, or Asynchronous Interface Only.

Allows the user to select the framing type.


Terrestrial Framing:

{NONE, 188, 204} DVB Only


Data Polarity:

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

Allows the user to invert the Tx Data polarity.


Symbol Pair:

{NONE, SWAPPED}

Allows the user to swap the I & Q Channels.

(BPSK Mode Only)


ESC Overhead:

{VOICE X2, DATA 64KBPS}

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


SCC Control Ratio:

{1:1,1:2, 1:3, 1:4, 1:5, 1:6, 1:7}

This function is only available when Tx Satellite Framing is
set to SCC.

Allows the user to simulate the framing used by the Satellite
Control Channel Option. Allows the user to set the ratio of
overhead in-band data to synchronizing words.


SCC Inband Rate:

{300 to 115200}

This function is only available when Tx Satellite Framing is
set to SCC.

Allows the user to request the rate of in-band data for the
overhead channel.