27
Appendix A
Alternate Configurations
An alternate configuration which uses the feedline coaxial cable for either the operational power or
the directional control voltages, but not simultaneously, can be used. This configuration requires
internal jumper changes in the
DXE-RFS-2
, along with additional hardware to couple the proper
voltage to the feedline.
For directional control through the feedline, the
DXE-RFS-2
re12 Vdc, ─12 Vdc and 12
Vac. The
DXE-FVC-1
Voltage Coupler can be used to supply these voltages.
In any alternate configuration, do not use coaxial cable or other conductor for more than one
simultaneous use. Refer to
Diagram 2
for connection details of one of several alternate
configurations.
The only reason for using an alternate configuration is to make use of existing 2 or 3
conductor control cable. Otherwise inexpensive four conductor control cable (
COM-CW-4
)
and the default configuration is recommended.
Any alternate configuration requires changing the internal jumpers from their default settings.
Be very careful about changing the default jumper settings.
You must not jumper the DXE-
RFS-2 so that power and directional control are done on the same conductor
. This will
damage the
RFS-2
or the
ARAV-3
active elements and is not covered under warranty.
Supplying Power Using the Feedline
If you use the feedline to supply operational power, then directional control for the
RFS-2
must be
done using the J12 connector. There are two ways to do directional control through J12 when using
the coaxial cable for power:
2 bit BCD style control voltage using terminals 1 & 2.
See
Table 4
. This requires at least a 2 conductor cable.
Economically priced
COM-CW-4
is
a 4 conductor Shielded Control Wire which may be used.
The feedline shield can be used for the
ground return provided it is grounded at the common power source.
Forward Direction
Rear Direction
A
B
C
EC-4 LED Illuminated
Element 1 (Default)
Element 3 (Default)
0
0
1
# 1
Element 2
Element 4
1
0
1
# 2
Element 3
Element 1
0
1
1
# 3
Element 4
Element 2
1
1
1
# 4
Table 4 - BCD Directional Control Matrix, “1” 12 Vdc (Default)
