9 j8 ports -5, 1 parallel (asi/dvb spi or asi/m2p interfaces) -5 – Comtech EF Data DD240XR Rev Е User Manual
Page 93
DD240XR High-Speed Digital Demodulator
Electrical Interfaces
MN-DD240XR – Rev. E
5-5
5.9 J8 Ports
J8 is the External Clock Input for the G.703 and HSSI Interfaces.
J8 is the Parallel/Serial RS-422 Output for the ASI Interface.
5.9.1 PARALLEL (ASI/DVB SPI or ASI/M2P Interfaces)
M2P/DVB is supported on the DB-25 Female Connector. It complies with RS-422 Electrical
Specifications. Refer to Tables 5-5a and 5-5b for pinouts for this connector. The maximum data
rate is 157.5 Mbps.
Table 5-5a. J8
− Parallel - 25-Pin Female
Pin No.
M2P Signal Name
DVB Signal Name
Direction
1
No Signal Present
CLK+
Output
14
No Signal Present
CLK-
Output
2
CLK+
GND
Output
15
CLK-
GND
Output/Ground
3
SYNC+
D7+
Output/Ground
16
SYNC-
D7-
Output
4
VALID+
D6+
Output
17
VALID-
D6-
Output
5
D0+
D5+
Output
18
D0-
D5-
Output
6
D1+
D4+
Output
19
D1-
D4-
Output
7
D2+
D3+
Output
20
D2-
D3-
Output
8
D3+
D2+
Output
21
D3-
D2-
Output
9
D4+
D1+
Output
22
D4-
D1-
Output
10
D5+
D0+
Output
23
D5-
D0-
Output
11
D6+
VALID+
Output
24
D6-
VALID-
Output
12
D7+
SYNC+
Output
25
D7-
SYNC-
Output
13
GND
GND
Ground