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: http://www.naic.edu/~phil/hardware/shutters/rcvrshutters.html
Дата изменения: Wed May 27 16:22:40 2015 Дата индексирования: Mon Apr 11 13:14:18 2016 Кодировка: Поисковые слова: saturn |
We have shutter/receiver protection to
protect the receivers when we transmit with one of our
transmitters (sband,430, hf). They are remotely controlled by
the shutter command (issued from vxWorks). The
protection can be grouped into:
shutter command
gr430protect command
This is a procedure that issues vxWorks
commands. You enter this at the vw% prompt
helpdt shutter will give:
shutter
- open,close, or query the receiver/radar shutters
SYNTAX:
shutter
.. query the current state
shutter {o}pen ..
open the receiver (sbw,cband) shutter
shutter {c}lose .. close
the receiver (sbw,cband) shutter
shutter {rdr}open .. open the
radar (sb narrow) shutter
shutter {rdrc}lose .. close the
radar (sb narrow) shutter
DESCRIPTION
Open, close, or query the receiver shutters. These shutters
are
used
to protect the receivers from our transmitters. The sband
wide an
d
cband
shutters open/close together. The sband narrow receiver
shutter
open/closes
with the rdropen, rdrclose requests. You only have to
type
in what is in { } (but don't enter the {}.
shutter
with no arguments will list the current state.
This
routine calls if1 with the keywords to manipulate the
shutter.
Example:
shutter
.. query current state
current setting: cb,sbw: closed sbradar:closed
usage: shutter open close rdropen rdrclose
shutter
open .. open the
cband, sband wide shutters.
shutter
rdrclose .. close the sband narrow
shutter.
SEE
ALSO:if1, sbsh
LASTMOD
:shutter :09mar00
This vxWorks command is used to protect
the other dome receivers when the 430 xmiter is used. it will:
When the 430 dome is being used, we want
to close all shutters, but leave the 430 dome receiver under
control of the ch load/antenna switch (above the
oscilloscopes in receiver room). The steps below are
part of the standard dual beam setup. It is also done when we
test the hf xmiter using the 430 receiver.