Config: Rx) Data (Data Rate); Config: Rx) Symb (Ip-Acm (Versafec Acm) Or V2-Acm (Versafec-2 Acm) Modes Only) - Comtech EF Data CDM-570A Installation And Operation Manual

6.3.2.4.4

(CONFIG: Rx) Data (Data Rate)

Rx Dat Rate:5000.000kbps
2500.000ksym (◄ ►,▲ ▼,ENT)
1. The Rx Data Rates associated with selection of the VFEC (VersaFEC),
ULL (Ultra Low Latency), VF2L (VersaFEC-2 Long Block), and VF2S
(VersaFEC-2 Short Block) FEC types are UNAVAILABLE when operating in
CDM-570 Compatible Mode. See Section 6.2 for further information.
2. The overall range of data rates is from 2.4 to 10239 kbps. The overall range
of symbol rates is from 4.8 to 3000 ksymbols/second. The minimum and
maximum data rates are dependent on modulation type and FEC encoder
rate. If you change the modulation or FEC type and the currently selected
data rate is no longer supported, the modem then automatically adjusts the
data rate up or down, keeping the symbol rate constant. The bottom line of
the display shows symbol rate, based on FEC type, modulation, FEC Code
Rate, and Data Rate.
3. If G.703 is the current interface type, the data rate is fixed either at 1544
kbps (T1) or 2048 kbps (E1).
4. *IMPORTANT – Where noted in the following table: If EDMAC framing is
employed, the upper data rate is reduced by 5% for data rates up to 2.048
Mbps, and by 1.6% for data rates above 2.048 Mbps, where EDMAC2 framing
is used, or for Rate 21/44 BPSK/QPSK TPC, or Rate 5/16 BPSK TPC.
6.3.2.4.5 (CONFIG: Rx) Symb (IP-ACM (VersaFEC ACM) or
V2-ACM (VersaFEC-2 ACM) Modes Only)
Appendix P. ADAPTIVE CODING and MODULATION (ACM) OPTION
IP-ACM (VersaFEC ACM) modes require the appropriate FAST codes for
the maximum operating symbol rate.
RxSymRate:
00031.204kbps(◄ ►,▲ ▼,ENT)
When either ACM mode is active, the CONFIG:Rx menu changes the Data option to Symb.
On the top line – Edit the Rx Symbol Rate by using the ◄ ► arrow keys to select the digit to
edit. Then, use the ▲▼ arrow keys to change that digit. Press ENTER. Note that asymmetric
operation is supported – transmit and receive symbol rates do not have to be equal.
Front Panel Operation
CDM-570A/570AL Satellite Modem with Optional Packet Processor
0065.066ksps
6–31
Revision 5
MN-CDM570A