Comtech EF Data CDM-570 - Manual (Page 43)

CDM-570/570L Satellite Modem with Optional IP Module Revision 12
Introduction MN/CDM570L.IOM
1–3
Plesiochronous/Doppler buffer, which has a programmable size, or may be bypassed. From here,
the receive clock and data signals are routed to the terrestrial interface, and are passed to the
externally connected DTE equipment.
The CDM-570/570L signal processing functions are performed in a single, large
Field-Programmable Gate Array (FPGA), which permits rapid implementation of changes,
additions and enhancements in the field. These signal processing functions are controlled and
monitored by a 32-bit RISC microprocessor, which also controls all front panel, serial and
Ethernet interfaces.
1.3 Features
1.3.1 Physical Description
The CDM-570/570L is constructed as a 1RU-high rack-mounting chassis, which can be free-
standing if desired. Rack handles at the front facilitate removal from and placement into a rack.
Physically, the modem is comprised of a single PCB assembly with two expansion slots for FEC
codecs and other option cards.
1.3.2 Compatibility
The CDM-570/570L is fully backwards-compatible with the Comtech EF Data CDM-500,
CDM-550, and CDM-550T modems, in addition to the CDM-600, CDM-600L, SDM-300 and
SDM-300L in selected modes.
For CDM-570/570Ls with the V1 or V2 IP Module Ethernet Interface Options: The
CDM-570/570L is fully backward-compatible with the Comtech EF Data CDM-IP
550 and CDM-IP 300L in selected modes.
1.3.3 Major Assemblies
Assembly Description
PL/10047-1 Chassis
AS/10901
Modem Card - CDM-570
AS/9979 Modem Card - CDM-570L
AS/10554 Turbo Codec
AS/10551 Reed-Solomon Codec
PL/10235 MPP-50 IP Module V1 10/100 BaseT Ethernet Interface (optional)
PL-0001216 MPP-70 IP Module V2 10/100 BaseT Ethernet Interface (optional)