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M&C and Interfaces
4.2.2.10.1 Drop Data Input, Insert Data Output, and Ext. Ref Clk (J1)
The Drop Data Input, Insert Data Output, and External Reference Clock balanced signals
are provided on a 15 pin "D" female connector accessible from the front of the break-out
panel. Screw locks are provided for mechanical security of the mating connector.
GROUND
INSERT DATA OUT
EXTERNAL CLOCK
DROP DATA INPUT
Note: The balanced insert data output signals on J1 are selected by SW2. The balanced
drop data input signals on J1 are selected by SW1. The balanced External Clock signals
on J1 are selected by SW3. Refer to Section 4.2.2.11 for further rear panel switch
information.
4.2.2.10.2 Drop Data Output (J2)
The balanced Drop Data Output signals are provided on a 15 pin "D" female connector
accessible from the front of the breakout panel. Screw locks are provided for mechanical
security of the mating connector.
GROUND
DROP DATA OUTPUT
DROP DATA OUTPUT
Note: The drop data output signals are connected to SW5 which selects DTE or DCE
operation. Refer to Section 4.2.2.11.7 for further information on SW5. The balanced
drop data output signals on J2 are selected by SW1. Refer to Section 4.2.2.11.2 for
further balanced drop data output selection.
4.2.2.10.3 Insert Data Input (J3)
The balanced Insert Data Input is provided on a 15 pin "D" female connector assessable
from the front panel of the breakout panel. Screw locks are provided for mechanical
security of the mating connector.
GROUND
INSERT DATA INPUT
4-4–36
Signal Function
GND
IDO-A
IDO-B
EXC-A
EXC-B
DDI-A
DDI-B
Signal Function
Signal Function
Name
Pin Number
2, 4
3
11
7
8
1
9
Name
Pin Number
GND
2, 4
DDO-A
1
DDO-B
9
DDO-A
3
DDO-B
11
Name
Pin Number
GND
2, 4
IDI-A
3
IDI-B
11
SDM-309B Satellite Modem
MN/U-SDM309B Rev. #
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