Config: Tx  Symb (Ip-Acm Or V2-Acm Modes Only); Config: Tx  Scrambler - Comtech EF Data CDM-625A Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)

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CDM-625A Advanced Satellite Modem

Front Panel Operation

CONFIG: Tx  Tx Data  Tx Sub-Mux

Tx Sub-Mux = Off (Off, On)

arrow keys to select the desired ratio. Press ENTER. There are a total of 34 ratio

selections available:

CONFIG: Tx  Symb (IP-ACM or V2-ACM Modes Only)

Appendix M. ADAPTIVE CODING AND MODULATION (ACM)

VersaFEC ACM or VerseFEC-2 ACM modes require the appropriate FAST codes for the

maximum operating symbol rate.

TxSymbolRate = 01000.000 ksps (ACM Mode)

Data Invert=Off Clock Invert=Off ()

It is important that you understand that the use of IP-ACM or V2-ACM modes represent

fundamental departures from the way you would typically configure the modem. When either

ACM mode is active, the CONFIG: Tx menu changes the Data option to Symb.

arrow keys to select TxSymbolRate, Data Invert, or Clock Invert. Press ENTER.

On the top line – Edit the Tx Symbol Rate by using the

Then, use the

On the bottom line – Set the Data Invert or Clock Invert operations by using the

keys to select either as On or Off. Press ENTER.

CONFIG: Tx  Scrambler

Tx Scrambler = IESS (Normal,IESS,Off)

arrow keys to select Normal, IESS, or Off. Press ENTER.

Ratio = 1/9 (IP/Synchronous)

arrow keys to change that digit. Press ENTER.

IESS-315 V.35 Scrambler

arrow keys to select the digit to edit.

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