Config: Tx) Symb (Ip-Acm Or V2-Acm Modes Only); Config: Tx) Frq (Frequency) - Comtech EF Data CDM-570A Installation And Operation Manual

6.3.2.3.5

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

Verify that (CONFIG: TI) IP-ACM or (CONFIG: TI) V2-ACM is selected to continue
with this section.
The IP-ACM (VersaFEC ACM) mode requires the appropriate FAST codes for the
maximum operating symbol rate.
Appendix P. ADAPTIVE CODING and MODULATION (ACM) OPTION
TxSymRate:
00031.139kbps(◄ ►,▲ ▼,ENT)
It is important that you understand that the use of VersaFEC ACM (IP-ACM) or VersaFEC-2 ACM
(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.
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.
6.3.2.3.6

(CONFIG: Tx) Frq (Frequency)

Tx IF Freq:1156.3456 MHz
To edit, use the
digit. Press ENTER.
For the CDM/R-570AL only: The valid range of frequencies is from 950 to 2250 MHz, in steps of
100 Hz.
If the Tx IF Frequency is set above 2000 MHz, and you then set the modem to
CDM-570 Compatible Mode, the Tx IF Frequency will be reset to 1201 MHz. Be
sure to reconfigure your Tx IF Frequency as needed.
Note that, if using the CONFIG: ODUBUC menus and you select a BUC LO frequency other
than zero, and you define whether the mix is high-side or low-side, then the display changes to
include the calculated Transmit RF frequency of the modem/BUC combination. Also, note that as
you edit the Tx IF frequency, the RF frequency updates automatically:
Tx IF Freq:1156.3456 MHz
RF=14156.3456(◄ ►,▲ ▼,ENT)
Front Panel Operation
CDM-570A/570AL Satellite Modem with Optional Packet Processor
00031.139ksps
(◄ ►,▲ ▼,ENT)
◄ ►
arrow keys to select a digit, and then use the ▲▼arrow keys to change that
6–22
Revision 5
MN-CDM570A