Comtech EF Data CDM-570A - Manual (Page 120)

CDM-570A/570AL Satellite Modem with Optional Packet Processor MN-CDM570A
Front Panel Operation Revision 2
6–16
6.3.2.3.2 (CONFIG: Tx) Mod (Modulation Type)
Modulation: BPSK QPSK
OQPSK 8-PSK 16-QAM 8-QAM
IMPORTANT NOTE – All selections are always viewable. If a Hardware or FAST option is
either uninstalled or invalid, the cursor will skip past the unavailable choice.
Use the ◄ ► arrow keys to select the Tx Modulation Type. Press ENTER. Referring to the table in
Sect. 6.3.2.3.1, the “Tx FEC Encoder Selection” dictates the “Available Tx Modulation Type” and
“Available Tx Code Rate” choices.
6.3.2.3.3 (CONFIG: Tx) Code (Code Rate)
Tx Code Rate: 5/16 21/44
1/2 2/3 3/4 7/8 0.95 Unc
IMPORTANT NOTE – All selections are always viewable. If a Hardware or FAST option
is either uninstalled or invalid, the cursor will skip past the unavailable choice.
Use the ◄ ► arrow keys to select the Tx Code Rate. Press ENTER. Referring to the table in Sect.
6.3.2.3.1, the “Tx FEC Encoder Selection” dictates the “Available Tx Modulation Type” and
“Available Tx Code Rate” choices.
6.3.2.3.4 (CONFIG: Tx) Data (Data Rate)
TxDataRate: 05000.000kbps
3000.000ksym (◄ ►,▲ ▼,ENT)
1) The Tx Data Rates associated with selection of the VFEC (VersaFEC) and ULL
(Ultra Low Latency) Tx FEC types are UNAVAILABLE when operating in CDM-570
Compatible Mode. See Sect. 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
the symbol rate, based on FEC type, Modulation type, FEC Code Rate, and Data
Rate. The table that follows lists the valid range of data rates.
3) If G.703 is the current interface type, the data rate is automatically set to either
1544 kbps (T1) or 2048 kbps (E1).
4) IMPORTANT NOTE – Where noted in the following table, if EDMAC framing is