Product specifications

CDM-710 Broadcast Satellite Modem Revision 11
CDI-60 HSSI Interface Module MN/CDM710.IOM
9–2
9.2 Physical Description
Figure 9-2 depicts the block diagram for the interface. The HSSI 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 9-2. CDI-60 HSSI Interface Module Block Diagram
Figure 9-3 s
hows the CDI-60 HSSI int
erface, looking towards the real panel. The 50-pin SCSI-2
connector serves as the data port, and a Light-Emitting Diode (LED) labeled Activity lights 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. 9.2.1; a summary of specifications for the
interface is provided in Sect. 9-3.
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