Physical Description; Figure 13-2. Cdi-60 Hssi Data Interface Module Block Diagram - Comtech EF Data CDM-710G Installation And Operation Manual

CDM-710G High-Speed Satellite Modem
HSSI Interface (CDI-60)
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.
J1
TT
SD
ST
TA
CA
RT
RD
Common

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.
Tx Clock Input (External)
Tx Data
Output Clock (Rate Programmable)
(RTS)
(CTS)
Rx Clock
Rx Data
13–2
MN-CDM710G
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 1