18
Default Configuration
The
DXE-RFS-SYS-4S
default configuration, as shown in
Diagram 1
, uses terminals A & B for the BCD directional
control interface and terminal C for operational and active
element power. The
DXE-EC-4
provides the operational
power as well as the 2-bit BCD interface used for directional
control. A user-supplied 4-conductor cable is needed to
connect the
DXE-RFS-3
and the
DXE-EC-4
with the
optional
DXE-TVSU-1B
Time Variable Sequencer Unit
switching the active antenna power conductor.
The switch positions on
the
DXE-EC-4
control
the directivity of the
received signal in the
DXE-RFS-SYS-4S
.
As shown in the diagram
to the right, position one
favors the NE direction, position 2 favors the SE direction,
position 3 favors the SW direction and position 4 favors the NW
direction when the array is positioned as shown.
Default Jumper Configuration Settings
Figure 5
shows the default jumper settings for the
DXE-RFS-3
. For JMP1 & JMP2 the center and
top pins of both are shorted. For JMP3 & JMP4, the center and bottom pins of both are shorted.
Figure 5 - Jumper Locations showing Default Settings
JMP1
Selects Power Voltage Source: Coax or J12 - Shown in default position, voltage from J12
JMP2
Selects Direction Voltage Source: Coax or J12 - Shown in default position, voltage from J12
JMP3
and
JMP4
Select Directional Voltage Configuration, either Differential or BCD.
Both Jumpers must be set the same. - Shown in default position for BCD
