Comtech EF Data CDM-625 - Manual (Page 125)

CDM-625 Advanced Satellite Modem Revision 15
Front Panel Operation MN-CDM625
5–25
If selecting ULL from the FEC menu with VersaFEC Codec installed, the options appear as shown:
Demod=BPSK (B,Q) ()
FEC Rate=0.493 (Fixed)
5.2.1.4.5 CONFIG: Rx  Data
Rx Data Rate Rx Sub-Mux
()
Use the ◄ ► arrow keys to select Rx Data Rate or Rx Sub-Mux, and then press ENTER.
If Rx Sub-Mux is ON, this menu provides read-only IP Info Rate information on the bottom line,
as shown:
Rx Data Rate Rx Sub-Mux
(IP Info Rate: 01200.340 kbps) ()
CONFIG: Rx  Data  Rx Data Rate
Rx Data Rate = 01544.000 kbps
Data Invert=Off Clock Invert=Off ()
Use the top line to edit the Rx Data Rate. The bottom line permits selection of the Data
Inversion or the Clock Inversion features (added for compatibility with certain older equipment).
On the top line – To edit the Rx Data Rate, use the ◄ ► arrow keys to select a digit to edit, and
then use the ▲▼ arrow keys to change that digit. Press ENTER when done.
The maximum limits for the Rx Data Rate are 18kbps to 25Mbps. The actual minimum and
maximum data rates are dependent on Framing mode, Interface type, Modulation type and FEC
Code Rate. If you change any of the higher-priority parameters – causing the data rate to
become invalid – the Data Rate adjusts automatically. The installed FAST option(s) also dictate
the upper range of data rate.
When configuring for D&I or IDR framing or for G.703 interface type, the ▲▼ arrow keys scroll
through only the available data rates. If you edit the data rate to 1920 kbps while in D&I
framing, a message appears to indicate that E1 Fixed Channel Mode is implemented.
When G.703 is used, three auxiliary rates – 512, 1024, and 2048 kbps – are available as indicated
by the word AUX appearing to the right of the decimal place (for example, 00512.AUX
kbps).