Comtech EF Data DM240XR User Manual
Page 80
DM240XR High-Speed Digital Modulator
Rear Panel Interfaces
MN-DM240XR– Revision 13
5–10
Table 5-6. DVB RS-422 Parallel, 25-Pin Female
Pin No.
Signal Name
Direction
21
D2 -
Input
22
D1 -
Input
23
D0 -
Input
24
DVALID -
Input
25
SYNC -
Input
5.12.4 Parallel LVDS Interface
This interface is identical to the Parallel RS-422 Interface except that it complies with the LVDS
Electrical Specification.
5.12.5 HSSI Interface
The HSSI (High-Speed Serial Interface) complies with the HSSI Functional and Electrical
Specifications. The physical interface is a 50 Pin SCSI-2 Type Connector. Electrical levels are
ECL. The pin outs for this interface are listed in Table 5-9.
Table 5-9. 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
5
30
LC
Loopback Circuit C
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
10
35
LA
Loopback Circuit A
Input
11
36
SD
Send Data
Input
12
37
LB
Loopback Circuit B
Input
13
38
SG
Signal Ground
---
14 - 18
39 – 43
5 Ancillary to
DCE
Reserved
Input
19
44
SG
Signal Ground
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