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Hamplus
Copyright © 2008
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- Reversible,
remotely controlled antenna switching system for eight antennas
in 8x1 mode.
- Aluminum
cabinet painted in the dark gray color, having 17 UHF type (PL-259)
for the R.F connections and one DB-25 for remote control.
- Allows some
different configurations of use, see diagrams of examples to follow.
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Specifications:
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Size:
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Width
25cm - Height 7cm - Deep 12cm |
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Power
Supply:
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D.C.
14 Volts + or - 20% drain about 120mA |
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Max.
power allowed:
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3000 Watts R.M.S with S.W.R. equal or less than 1.5:1 |
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Frequency
of operation:
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D.C.
to 60MHz |
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Time
delay to switch:
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Equal
or less than 50ms (exchange forbidden during TX) |
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Insertion
loss:
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Equal
or less than 0,02dB |
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Crosstalk:
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Equal
or less than -68dB to 30MHz and -55db to 60MHz
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Connections suggestions:
| Eight
antennas, one radio |
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| The switcher
AS-81R receives the signals from eight antennas selecting one of them
for the radio, leaving the others seven available in the inferior
connectors. In them can be installed connector in short to put ground
on free antennas. In the case of power supply disconnection, the radio
became free and all antennas are grounded. Another possibility is
the use of another switcher in the inferior connectors to make use
the antennas not selected for the main equipment. |
| Eight
antennas, two radios |
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| The switcher
AS-81R can be cascaded as shown above, allowing to share up to eight
antennas between two or more equipment. For each added switcher AS-81R,
can be possible the use one more radio, sharing the same set of antennas.
In the same way, on the last switcher of the cascade, can be installed
connector in short to put ground on free antennas. Also in the case
of power supply disconnection, the radio became free and all antennas
are grounded. Another possibility is the use of another switcher in
the inferior connectors to make use the antennas not selected for
the main equipment. |
| Eight
antennas, four radios or more |
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| Here an example
finishing the net with a switcher model AS-82. The functioning is
similar to the previous diagram also with automatic switch to ground
for the antennas not in use, since the model AS-82 already makes this
internally. More switchers type AS-81R can be place on the net to
allow to add more radios to the system. |
| 16 antennas solution diagram |
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