Config: Tx  Symb (Ip-Acm Mode Only) - Comtech EF Data CDM-625 Installation And Operation Manual

Advanced satellite modem (18 kbps – 25 mbps)

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CDM-625 Advanced Satellite Modem

Front Panel Operation

Note that in QDI (Quad D&I) mode, these data rates are read-only! The data rate is the sum of

the tributary rates for all ports. You must edit them via the QDI menu.

On the bottom line – To set the Data Invert or Clock Invert operation, for either, use the

arrow keys to select On or Off. Press ENTER when done.

CONFIG: Tx  Tx Data  Tx Sub-Mux

Tx Sub-Mux = Off (Off, On)

Ratio = 1/9 (IP/Synchronous)

arrow keys to select the desired ratio, and then press ENTER. There are a total of

34 ratio options available:

5.2.1.3.7 CONFIG: Tx  Symb (IP-ACM Mode Only)

Chapter 17. ADAPTIVE CODING AND MODULATION (ACM)

VersaFEC ACM requires the correct hardware module (PL-0000264) to be installed in

the CDM-625; Version 1.4.0 (or higher) firmware; and the appropriate FAST code for

the maximum operating symbol rate.

TxSymbolRate = 01000.000 ksps (ACM Mode)

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

Take care to note that the use of IP-ACM is a fundamental departure from the way you would

typically configure the modem. When IP-ACM mode is active, the CONFIG: Tx menu changes the

Data option to Symb.

arrow keys to select TxSymbolRate, Data Invert, or Clock Invert, and then press

On the top line – To edit the Tx Symbol Rate, use the

edit, and then use the

On the bottom line – To edit the Data Invert or Clock Invert: For either, use the

to select On or Off, and then press ENTER.

arrow keys to change that digit. Press ENTER when done.

arrow keys to first select the digit to