CDM-750 Advanced High-Speed Trunking Modem
Revision 2
Introduction
MN-CDM750
1–3
DVB
‐
S2
Receiver:
The
CDM
‐
750
supports
DVB
‐
S2
QPSK,
8PSK,
16APSK,
and
32APSK
modulation/
demodulation
up
to
63
Msps
with
receive
data
rates
up
to
169
Mbps
depending
on
the
modulation
type
and
code
rate.
In
DVB
‐
S2
operation,
the
receiver
operates
in
the
CCM
and
ACM
modes.
The
receiver
automatically
detects
for
pilots
ON/OFF
and
supports
spectral
rolloff
of
20%,
25%
or
35%.
•
Sect.
1.3
CDM
‐
750
Features
•
Sect.
1.4
CDM
‐
750
Specifications
•
Appendix
H.
FEC
(FORWARD
ERROR
CORRECTION)
Verification:
The
CDM
‐
750
includes
many
test
modes
and
loopbacks
for
rapid
verification
of
the
correct
functioning
of
the
unit.
Of
particular
note
is
the
IF
loopback,
which
permits
the
user
to
perform
a
quick
diagnostic
test
without
having
to
disturb
external
cabling.
During
the
loopback,
all
of
the
receive
configuration
parameters
are
temporarily
changed
to
match
those
of
the
transmit
side,
and
an
internal
RF
switch
connects
the
modulator
output
to
the
demodulator
input.
When
normal
operation
is
again
selected,
all
of
the
previous
values
are
restored.
Monitor
and
Control
Interfaces:
The
unit
is
managed
through
multiple
interfaces
providing
options
for
both
in
‐
band
and
out
‐
of
‐
band
monitor
and
control.
•
Chapter
5.
FRONT
PANEL
OPERATION
•
Sect.
6.3
(ETHERNET
‐
BASED
PRODUCT
MANAGEMENT)
SNMP
Interface
•
Sect.
6.4
(ETHERNET
‐
BASED
PRODUCT
MANAGEMENT)
Telnet
Interface
•
Sect.
6.5
(ETHERNET
‐
BASED
PRODUCT
MANAGEMENT)
Web
Server
(HTTP)
Interface
•
Chapter
7.
SERIAL
‐
BASED
REMOTE
PRODUCT
MANAGEMENT
On
‐
site
Firmware
Updates:
Field
update
of
the
operating
system
firmware
is
possible
through
file
upload
via
satellite
or
the
Ethernet
port.
Chapter
4.
UPDATING
FIRMWARE
On
‐
site
Operational
Upgrades:
Field
activation
of
software
‐
based
options
is
possible
through
Comtech’s
FAST
(
F
ully
A
ccessible
S
ystem
T
opology)
Feature
upgrade
process.
Appendix
A.
FAST
OPTIONS
AND
ACTIVATING
PROCEDURE
shows
the
FAST
and
FAST
‐
accessible
hardware
options
available
for
the
CDM
‐
750.
Summary of Contents for CDM-750
Page 76: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Updating Firmware MN CDM750 4 12 Notes...
Page 224: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix A MN CDM750 A 4 Notes...
Page 234: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix B MN CDM750 B 10 Notes...
Page 256: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix C MN CDM750 C 22 Notes...
Page 280: ...CDM 750 Advanced High Speed Trunking Modem Revision 2 Appendix D MN CDM750 D 24 Notes...
Page 300: ...2114 WEST 7TH STREET TEMPE ARIZONA 85281 USA 480 333 2200 PHONE 480 333 2161 FAX...
