Comtech EF Data cdm-570a - Page 660

CDM-570A/570AL Satellite Modem with Optional Packet Processor
Revision 5
Adaptive Coding and Modulation (ACM) Option P–14 MN-CDM570A
Step
Task
Front Panel VFD Mnemonic
4
cont
If AUPC mode is selected with the IP, IP-ACM, or V2-
ACM mode previously selected,additional choices are
presented:
• Max-Range
• Tx-Alarm
• DemodUnlock
Max-Range Tx-Alarm
DemodUnlock (◄ ►)
In all case except MEO (which is a very unusual mode)
the mode is fixed at Normal. Enter the maximum
permitted power increase, between 0.0 and 9.9 dB.
Maximum-permitted Power
increase: 3.0dB(◄ ►,ENT)
Select an alarm when the max power or minimum
ModCod has been reached, or not at all. The choices
are:
• None
• Max Power
• Mini Modcod
Tx Alarm: None MaxPower
MiniModcod ◄ ►
5
(SELECT) CONFIG: RX  FEC
Use the ◄ ► arrow keys to select a parameter. Set the
Rx FEC type as:
• VF2L (VersaFEC-2 Long)
• VF2S (VersaFEC-2 Short) Block
Note that this does not have to match the Tx FEC type.
RxFEC: Vit Vit-RS TCM-RS
TPC VF Ull VF2L VF2S Unc
6
(SELECT) CONFIG: RX  SYMB
Use the ◄ ► and ▲▼arrow keys to enter the desired
receive symbol rate. Note that asymmetric operation is
supported – transmit and receive symbol rates do not
have to be equal.
RxSymRate: 0065.066ksps
00031.204kbps(◄ ►,▲ ▼,ENT)
7
(SELECT) CONFIG: TI 
Use the ◄ ► arrow keys to select a parameter. Press
ENTER to set the mode as V2-ACM.
Data Intf: RS422 IP V.35
RS232 G703 IP-ACM V2-ACM
8
(SELECT) CONFIG: TI  V2-ACM  ACM
Use the ◄ ► arrow keys to select a parameter. Press
ENTER to set the mode as
• ModCod
• Unlock-Action
• Target-SNR-Margin
ACM:ModCod Unlock-Action
Target-SNR-Margin