Product specifications

CDM-710G High-Speed Satellite Modem Revision 1
HSSI Interface (CDI-60) MN-CDM710G
13–2
13.2 Physical Description
Figure 13-2 depicts the block diagram for the interface. The HSSI data interface is implemented
on a 3.95 x 7.022 inch (10.03 x 17.83 cm) PCB. Connection to the modem is provided when the
96-pin DIN connector is engaged into the modem slot.
Figure 13-2. CDI-60 HSSI Data Interface Module Block Diagram
Figure 13-3 shows the
CDI-60 HSSI interface, looking towards the real panel. The 50-pin
SCSI-2 connector serves as the data port, and a Light-Emitting Diode (LED), labeled Activity, is
lit green when the interface is enabled.
The CDI-60 HSSI interface provides:
• A single HSSI interface;
• DCE Connection;
• ST clock is sourced to the terrestrial interface for use as reference by DTE;
• TT is treated as an incoming External Clock, and the interface phase locks to it;
• TA / CA is supported.
The connector pinout for the interface is provided in Sect. 13-3; a summary of specifications for the
interface is provided in Sect. 13-4.
Processor
Mux /
Demux
PLL
Rx
Buffer
Interface
Loopback
Control
Processor
Mux /
Demux
PLL
Rx
Buffer
Interface
Loopback
Control
Modem
Interface
Clk
&
Data
μC
HSSI Interface
TT
SD
ST
Common
J1
Rx Clock
Rx Data
50 Pin HSSI Female
TA
CA
(RTS)
(CTS)
Tx Clock Input (External)
Tx Data
Output Clock (Rate Programmable)
RT
RD