Software - Flash Upgrading; Verification; Data Interfaces - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
Introduction
1.1.1 Software – Flash Upgrading
The internal software is both powerful and flexible, permitting storage and retrieval of up to 10
different configurations. The modem uses 'flash memory' technology internally, and new
firmware is uploaded to the unit from an external PC. This simplifies software upgrading, and
updates are available via the Internet. The upgrade is performed without opening the unit by
simply connecting the modem to the Ethernet port of a computer.

1.1.2 Verification

The unit includes a number of tests for rapid verification of the correct functioning of the unit.
Selection of a CW carrier permits measurement of carrier center frequency or phase noise
characteristic. A single-sideband carrier also is available at the operating symbol rate to check I
and Q phase and amplitude balance. When normal operation is again selected, all of the previous
values are restored.

1.1.3 Data Interfaces

The modulator has plug-in data interfaces that are removed or installed from the rear of the
chassis while the unit remains in the rack. The same terrestrial interface should be used in a
modulator and demodulator used in a single satellite link. The interfaces offered (one active at a
time) include:
CDI-40 ASI
CDI-60 HSSI
None
PL/10881-3
PL/10881-4
•
CDI-40 Duplex ASI Interface
•
CDI-70 1000 Base-T (GbE) Interface
•
CDI-60 HSSI Interface
Allowable Data Interface Combinations
Slot 1
ASI Interface Usage By Application (Also see Chapter 10)
Standard non-redundant applications.
Tx only 1:1 redundancy. Rx output (J2 and J3) is the standard ASI level
Full duplex 1:N redundancy. Rx output (J2 and J3) is the standard ASI level
Standard non-redundant applications (excluding J3)
Tx only, Rx only or full duplex (Tx and Rx) 1:1 redundancy.
Rx output J2 is standard level
Rx output J3 is higher so the standard level is delivered after a 3 dB
combiner
Full duplex 1:N redundancy (excluding J3)
None
CDI-70 Gigabit Ethernet
None
CDI-70 Gigabit Ethernet
CDI-70 Gigabit Ethernet
1–3
Revision 9
MN/CDM710.IOM
Slot 2