Table F-1. Asynchronous Overhead Jumpers; Table F-2. Data Rate Jumpers - Comtech EF Data SDM-650B Installation And Operation Manual

SDM-650B Satellite Modem
JP11
1 2
AS/1311 REV
ASYNC OVERHEAD TERRESTRIAL INTERFACE BOARD
JP1
1
2
JP1
JP2
JP3
JP10
JP11
JP12
JP8, JP9, JP13
Rev. 5
JP2
1 2
JP3
1
Figure F-2. Asynchronous Overhead Interface Board

Table F-1. Asynchronous Overhead Jumpers

JP #
1 to 3, and 2 to 4
3 to 5, and 4 to 6
1 to 2
3 to 4
5 to 6
1 to 2
2 to 3
1 to 2
2 to 3
1 to 2
3 to 4
1 to 2
2 to 3
1 to 2
2 to 3
Data Rate Impedance
1.544 Mbit/s
BAL−100
2.048 Mbit/s
BAL−120
2.048 Mbit/s
UNBAL−75
6.312 Mbit/s
BAL−110
6.312 Mbit/s
UNBAL−75
8.448 Mbit/s
UNBAL−75
1
JP4
JP5 JP6
1
1
JP8 JP13
1 1
JP10
1
1
1
JP12
JP9
Pin #
V.35, RS-422, MIL-STD-188
G.703
Auto TX CLK Phase Select
Fixed Phase, Normal
Fixed Phase, Inverted
G.703 data activity detect
TX Terr CLK activity detect
V.35 operation
RS-422, MIL-STD-188 operation
Normal SCT output
TX CLK "chained" to SCT output
2-wire operation
4-wire operation
Asynchronous
RS-485
RS-232-C

Table F-2. Data Rate Jumpers

JP4 JP5
OFF ON
OFF ON
OFF ON
1 to 2 OFF
OFF OFF
OFF ON
Asynchronous Overhead Channel Unit
JP7
1
Function
JP6 JP7 Voltage
ON OFF 5.8 Vp-p
ON OFF 5.8 Vp-p
ON OFF 4.6 Vp-p
OFF OFF 1.8 Vp-p
OFF OFF 3.3 Vp-p
ON OFF 4.8 Vp-p
F–5