Comtech EF Data CDM-625A, Installation And Operation Manual

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CDM-625A Advanced Satellite Modem MN-CDM625A
Front Panel Operation Revision 4
6–21
CONFIG: Tx

Tx Data

Tx Sub-Mux
Tx Sub-Mux = Off (Off, On)
Ratio = 1/9 (IP/Synchronous) (

)
Use the ▲▼ arrow keys to select the desired ratio. Press ENTER . There are a total of 34 ratio
selections available:
► 1/59 ► 1/39 ► 1/19 ► 1/9 ► 1/8 ► 1/7 ► 1/6 ► 1/5 ► 1/4
► 2/7 ► 1/3 ► 2/5 ► 3/7 ► 1/2 ► 3/5 ► 2/3 ► 3/4 ► 4/5
► 1/1 ► 5/4 ► 4/3 ► 3/2 ► 5/3 ► 2/1 ► 7/3 ► 5/2 ► 3/1
► 7/2 ► 4/1 ► 5/1 ► 6/1 ► 7/1 ► 8/1 ► 9/1
6.2.1.3.7 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 .
Use the ◄ ► arrow keys to select TxSymbolRate , Data Invert , or Clock Invert. Press ENTER.
On the top line – Edit the Tx Symbol Rate by using the ◄ ► arrow keys to select the digit to edit.
Then, use the ▲▼ arrow keys to change that digit. Press
ENTER
.
On the bottom line – Set the Data Invert or Clock Invert operations by using the
▲▼
arrow
keys to select either as On or Off . Press ENTER .
6.2.1.3.8 CONFIG: Tx

Scrambler
Tx Scrambler = IESS (Normal,IESS,Off)
IESS-315 V.35 Scrambler (

)
Use the
▲▼
arrow keys to select Normal , IESS , or Off . Press ENTER .