Physical Description; Figure 9-2. Cdi-60 Hssi Interface Module Block Diagram - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710 Broadcast Satellite Modem
CDI-60 HSSI Interface Module
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.
J1
TT
SD
ST
TA
CA
RT
RD
Common

Figure 9-2. CDI-60 HSSI Interface Module Block Diagram

Figure 9-3 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 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.
Tx Clock Input (External)
Tx Data
Output Clock (Rate Programmable)
(RTS)
(CTS)
Rx Clock
Rx Data
9–2
MN/CDM710.IOM
Processor
Processor
Mux /
Clk
Mux /
Demux
&
Demux
Data
PLL
PLL
Modem
Interface
Rx
Rx
μC
Buffer
Buffer
Interface
Interface
Loopback
Loopback
Control
Control
HSSI Interface
Revision 11