DMD50 Universal Satellite Modem
Rear Panel Interfaces
TM118 – Rev. 1.1
5-13
5.6 High-Speed Serial Interface (HSSI) (Optional)
5.6.1 HSSI (J6)
The HSSI (High-Speed Serial Interface) (J6) complies with the HSSI Functional and Electrical
Specifications. The physical interface is a 50-Pin SCSI-2 Type Connector. Electrical levels are
ECL. Gapped clocking not supported. The pinouts for this interface are listed in Table 5-11.
Table 5-11. J9 – HSSI (High-Speed Serial Interface) 50-Pin Connector
Pin No. (+)
Pin No. (–)
Signal Name
Description
Direction
1 26
SG Signal
Ground ---
2 27
RT Receive
Timing
Output
3 28
CA DCE
Available
Output
4 29
RD Receive
Data Output
6 31
ST
Send
Timing
(SCT)
Output
7 32
SG Signal
Ground ---
8 33
TA DTE
Available Input
9
34
TT
Terminal Timing (SCTE)
Input
11 36 SD
Send
Data
Input
13 38 SG Signal
Ground ---
14 - 18
39 – 43
5 Ancillary to
DCE
Reserved Input
19 44 SG Signal
Ground ---
20 - 23
45 - 48
4 Ancillary
from DCE
Reserved Output
24 49 TM
Test
Mode Output
25 N/A
MOD_FLT
Alarm
Output
50 N/A
DMD_FLT
Alarm
Output
Summary of Contents for DMD50
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