Array Solutions Four Square Panduan Pengguna - Halaman 5
Jelajahi secara online atau unduh pdf Panduan Pengguna untuk Sistem Kontrol Array Solutions Four Square. Array Solutions Four Square 10 halaman. Array controller
Juga untuk Array Solutions Four Square: Panduan Pengguna (12 halaman)
Halaman Cetakthan 0.80 to reach all 4 antennas. If you have raised radials you will need to use ¾ wave-length
lines.
Attach the antenna feed lines to the correct ports silkscreened on the relay box per the above
diagram. Also attach your dummy load (100 W or more) to the Dummy Load port of the relay
box.
– there is a PTT input in the back of the controller to inhibit hot switching the relays.
PTT
Switching the directions
control switch. The no power and default position is to the North East. On this direction the
system is not supplying any voltage to the array.
OMNI Mode-
The middle pushbutton is the OMNI directional position. In this position you will
need to tune the LC network for an SWR of 1:1 at your desired frequency. Tune it by adjusting
the inductor tap and by adding some of the supplied capacitors in this network. The network has
enough inductance to adjust it for the band you have selected and for the common types of
antennas used for a four square array.
A Word about VSWR and Matching
The Hybrid coupler is very forgiving and the SWR you see driving your array providing you have
tuned all your antennas correctly and identically should be nearly 1:1 or less then 1.3:1 over the
band for normal ¼ wavelength verticals.
If you have an oscilloscope or phase meter you can observe the phasing of the controller at the
antenna ports with the probes connected to the SO239 Antenna connectors. You can solder a
short wire into each of the four connectors on the PCB side to make test points. Using the
optional optimizing kit you can adjust the waveforms to further enhance the system. But, as it is,
the system should show very good directivity without the optimization kit.
Optimization Kit
We have added the positions in the PCB to accommodate the shunt capacitors and inductor to
optimize the directivity of the quadrature-fed Four Square controller. By using the "Two shunt
compensation design system" by W1MK, you can predict the values necessary to optimize your
array. For instance an 80 m four square would use about 300 pF of capacitance and 6 µH of
shunt inductance.
Since we have carefully designed the Hybrid inductance, it should be pretty close to optimum, it is
probably more useful to place in some C in the circuit at position C13.
Watch your SWR over the whole band as well as the Power into the dump load. Make a chart to
help you see the differences over the frequency range your interested in. You should add one
capacitor at a time from our kit or from capacitors you have, by soldering them in, and then
measure the SWR and plot it on your chart. Also monitor the power in the dump load with a
wattmeter and it also should improve as you plot it vs frequency. Use the following chart for both
L and C values.
www.arraysolutions.com
2611 N. Beltline Rd.,Ste 109
Sunnyvale, TX, 75182, USA
of the array's pattern is done with the push buttons on the controller
Phone: +1 214 954 7140
Four Square Manual, ver. 2.1
August 21 2017
5