Rx: Sym; Rx: Descrm; Rx: Eb/No - Comtech EF Data CDM-700 Installation And Operation Manual

CDM-700 High Speed Satellite Modem
Front Panel Operation
Composite Data Rate = ∑ Port-Data Rates, where:
Symbol Rate = 1.025 *Composite Data Rate /(m *CR), where:
Press or
ENTER
Rx: Sym
Rx Sym Rate:
34.368000 Msps
This is a 'read only' status window that displays the Symbol Rate. Refer to the detailed
explanation provided under (CONFIG:) Rx
The symbol rate shown in this example is for a composite data rate of 34.368 Mbps (E3) when
the modulation is QPSK and the code rate is 3/4.
Press or
ENTER
Rx: Descrm
Descrambling: Default-On
Off
Options are:
Default-On
Off
The options are displayed all of the time, but the ◄ ► arrow keys will force the cursor to skip
past an unavailable choice. Press
Rx: Eb/No
Eb/No Alarm: Threshold
Alarm/Fault
Select Threshold or Alarm/Fault using the
Ports = all enabled ports for Intfc1 and Intfc2 and depends upon the interfaces
installed in Slot 1 and Slot 2.
m = the modulation index (2 for QPSK, 2 for 8-PSK, 4 for 16-QAM, 5 for
32-QAM, 6 for 64-QAM),
and
CR = Code Rate (3/4, etc)
to return to the previous menu.
CLEAR
to return to the previous menu.
CLEAR
The proprietary descrambler is selected.
No Descrambling.
ENTER
(
(E)
Data.
( E)
.
E)
◄ ►
arrow keys. Press
6–20
Revision 5
MN/CDM700.IOM
.
ENTER