Interfaces of the ACU
4-2
Chapter 4: Interfaces
98-148248-C
4.1.3 ADU connector
The coax cable from the ACU to the ADU is used to power the ADU, supply a reference
clock, handle all communication between ACU and ADU, and deliver the Rx and Tx signals.
4.1.4 Rx In and Tx Out connectors
Use these connectors to connect the ACU to the modem.
Outline
(on the ACU)
Conductor
Pin function
Inner
DC to ADU
reference clock to ADU
ACU to ADU internal
communication
GX Rx/Tx
Outer
GND (Shield)
Table 4-2: N connector, outline and pin assignment
Important
Do not use TNC connectors on the ACU, ADU antenna cable or on pigtails.
TNC connectors cannot carry the DC current for operating the ADU.
Outline (on the ACU) Pin number
Pin function
1
Inner conductor:
reference clock, Rx/Tx
2
Outer conductor: GND (Shield)
Table 4-3: F connector, Rx and Tx, outline and pin assignment
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