Comtech EF Data CDM-425, Installation And Operation Manual

Page: 139 / 744

CDM-425 Advanced Satellite Modem
Revision 0
Front Panel Operation 6–21 MN-CDM-425
Note that these data rates are read-only in QDI (Quad D&I) mode! The data rate is the sum of
the tributary rates for all ports.
On the bottom line – You may set either Data Invert or Clock Invert operation by using the
▲▼ arrow keys to select
On or Off . Press ENTER .
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 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 K. V
ERSA
FEC
®
/ V
ERSA
FEC-2 ACM ADAPTIVE CODING
AND
MODULATION (ACM) OPTION
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 .