Optional Items - DX Engineering DXE-RCA8B-SYS-4P Manual

Receive Eight Circle System relay unit to determine if there is an obvious reason that Active
Vertical Antenna power is not making it out the antenna ports. A bad connection outside of the
RFS relay unit is usually the problem, and rarely has a component failure inside the Receive
Eight Circle System relay unit been discovered.
Proper Receive Eight Circle System phasing requires that each Active Vertical Antenna,
and its respective equal length feedline, actually provides the same signal level to the
Receive Eight Circle System unit. Use a steady, non-fading ground wave signal from a low or
medium power daytime AM Broadcast station that is over 10 miles away, on a frequency high
in the band, or another constant signal source near 160 or 80 meters, well away from the array,
to test that each Active Vertical receives the same signal level. Do not use sky wave or night
signals for these signal level tests.
9) Test reception of each Active Vertical Antenna by connecting each antenna feedline, one at a
time, to an activated port on the Receive Eight Circle System. This assumes that a good port
has been identified and is functioning properly. Normal reception must be confirmed from each
antenna. If any antenna is not providing the proper RF signal level, move the AVA unit to a
known good feedline position to rule out the possibility that a bad feedline is attenuating the
RF. If one or more Active Receive Verticals produce a low or no signal, then the AVA unit at
the base of that antenna may not be receiving power. Retest for DC power at the antenna end of
that feedline. If + 10 to 18 Vdc is found, then the Active unit may need to be serviced or
replaced. New DXE-AVA-2 units are available separately by calling DX Engineering.
10) If all Active Verticals tested provide the same signal level, then change switching voltages to
activate the other ports, one at a time, and test each Receive Eight Circle System unit port,
using one of the good antennas, testing for the same level of reception. If one or more ports is
dead or has diminished reception, there may be a problem in a delay line or in the Receive
Eight Circle System unit.
11) Using tested or replaced delay lines and connectors, if one or more ports is dead or has
diminished reception, the Receive Eight Circle System unit may require service or replacement.
At this point, the problem in your system should have been identified.
If you need additional assistance from DX Engineering, feel free to call or write. Detailed
discussions of system function, connections, and troubleshooting is best handled by telephone,
Monday through Friday, 8:30 am to 4:30 pm Eastern Time, at 330-572-3200.

Optional Items

DXE-RLP-75FF - Lightning Protector, Receive 75Ω, DC Pass, F Conn
Unique In-Line® design is impedance matched to 75Ω and is virtually transparent to all analog or digital bi-
directional signals from DC to 1.0 GHz. Tii's patented proprietary coaxial gas tube surge protector is equipped
with an integral fail short mechanism for a power-cross condition which shunts both the coaxial cable's center
conductor and sheath for a common path to ground. The protection element is designed to reset after each over
voltage event. Metallic housing of the Tii In-Line® Coaxial Lightning Surge Protector provides necessary EMI
shielding. When properly connected the protector is environmentally sealed (15 psi) to prevent ingress of
moisture and humidity encountered in broadband pedestals, vaults, NIDs and stand alone applications.
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