AMERITRON RCS-8V Buku Petunjuk - Halaman 3
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INTRODUCTION
The Ameritron RCS-8V is a remote controlled coaxial RF
switch that will operate with negligible loss, radiation and
VSWR at all frequencies up to 250 MHz. Only a slight
compromise in VSWR occurs at 450 MHz. Power rating
is four kilowatts PEP below 30 MHz and one kilowatt
PEP at 150 MHz.
The RCS-8V permits the operation of up to five separated
antennas with only one coax feedline.
telephone type control cable with a minimum of five
conductors is required.
The control console selects the supply voltage for the
relay box. The front panel has five LED's that indicate
the antenna that is in use.
The RCS-8V operates on +12 Vdc voltage. The RCS-8V
is supplied with a +12 Vdc adaptor for 100-120 Vac input
50/60 Hz. The RCS-8VX is supplied with a +12 Vdc
adaptor for 200 to 240 Vac input 50/60 Hz.
The RCS-8VL models include Gas Discharge Tubes
attached to each antenna terminal.
INSTALLATION
The relay box may be mounted on a tower leg, mast or
building wall.
The mounting hardware furnished will
accept a tubular mast up to 1 ½" diameter.
If the box is mounted on a building wall discard the "U"
bolt assembly and use two ½" screws to attach the bracket
to the wall.
The relay box must be mounted with the connectors
down. Do not attempt to air seal the relay box. Install
drip loops below the box if the feedlines are brought in
from a higher location. Lightning retarding loops area
recommended precaution on all cables (see Figure 1).
Relay Box Cable Connections
Inexpensive five or more conductor rotor or telephone
cable can be used to connect the relay box to the control
console.
The only requirement is that the cable be
physically able to survive the environment it is installed.
Wire gauge and voltage breakdown are not critical.
Conductor and ground return (through the coax shield)
resistances can total 80 ohms before operation becomes
compromised.
Remove the four screws at the corners of the panel and
remove the cover. Route one end of the control cable
through the bushing in the panel and through the plastic
cable clamp.
Connect five of the wires in the cable to terminals 1 to 5.
Make a note of the color that is connected to each
terminal. If a sixth wire is available in the control cable,
connect it to the "G" terminal.
Reinstall the cover on the panel using the self-tapping
screws previously removed.
The indoor console and outdoor relay box must have a
ground reference to each other.
ground, or a ground wire in the control cable.
A rotor or
Relay Box Antenna Connections
Connect your antennas to coax connectors numbered 1-5
and note which antenna is connected to each connector.
Connect the feedline to the connector marked "INPUT".
If control power is removed, the relay box automatically
disconnects the "input" feed connection from all antenna
ports.
Unselected antenna ports may be automatically grounded
or isolated.
isolated. To automatically ground the unselected port, a
short jumper must be installed as shown in Figure 2.
More than one antenna port can be "picked up" at one
time by applying control voltage to more than one relay at
LIGHTNING RETARDING LOOPS
THIS LENGTH MAY VARY UP TO
3 FT. IT MUST NOT CONTACT
THE MAST OR TOWER
2 TURNS 6" DIA. ON ALL CABLES
LEAVING AND ENTERING THE
RELAY BOX. KEEP COILS SPACED
FROM EACH OTHER BY VERTICAL
OR HORIZONTAL SEPARATION OF
2" MINIMUM
TAPE TO THE MAST OR TOWER FOR
SUPPORT NEAR THE RELAY BOX
MOUNTING LOCATION
TO ANTENNA
The RCS-8V is shipped with the ports
Either by RF, earth
Figure 1