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Ku-Band Satellite Transceiver
Operation
The RJU-2000 combines the individual REMOTE interface of each of the KST-2000A/B
systems into a common system M&C connector (J6). Because of the "Parallel" nature of
this interface, only EIA-485 (2 wire) and EIA-422 (4 wire), half duplex serial communi-
cations are supported. This connector provides a diode "OR'd" power supply to power a
KP-10, and routes unit A and B uplink and downlink fault relay outputs to the user. The
RJU-2000 performs status signal routing between KST-2000A/B unit A and B and switch
position command/indicators to each of the KST-2000A/B and TX RX and IF switches.
This is done through the 1:1 connector (J3) and TX (J1) and RX (J2) switch interfaces.
3.4
Connector Descriptions
3.4.1
TX Switch Connector (J1)
The TX switch connector (J1), is a 6-pin, MS style male connector. It routes position
commands and indicators from the TX switch to each KST-2000A/B. Refer to
Table 3-1 for connector pinout.
Pin
A
B
C
D
E
F
3.4.2
RX Switch Connector (J2)
The RX switch connector (J2) is a 6-pin, MS style male connector. It routes position
commands and indicators from the RX waveguide switch to each KST-2000A/B. Refer to
Table 3-2 for connector pinout.
Pin
A
B
C
D
E
F
Table 3-1. Connector J1 Pinout Description
Switch position A command, 500 ms +28VDC pulse
Switch command common
Switch position B command, 500 ms +28VDC pulse
Switch position A indicator (D and E connected position A)
Switch position indicator common
Switch position B indicator, (E and F connected position B)
Table 3-2. Connector J2 Pinout Description
Switch position A command, 500 ms +28VDC pulse
Switch command common
Switch position B command, 500 ms +28VDC pulse
Switch position A indicator (D and E connected position A)
Switch position indicator common
Switch position B indicator, (E and F connected position B)
3–10
Description
Description
Revision 9
MN/KST2000AB.IOM
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