Operation
TABLE 5-38 USER INTERFACE OPTIONS SETTINGS
OPTION DEFAULT DESCRIPTION
Audible
alarm
Disabled
The audible alarm is a tone (different from the warning bell tone) which is
continuously sounded whenever the ACU has a fault condition that has not been
acknowledged. Normally, this is left on, as it will alert an operator that a fault
condition is in effect, even if the operator cannot see the display. This is often
turned Off during installation until all connections are in place. It may also be
turned Off if the SUM ALM contact is wired to a station alarm which provides
an alternative audible/visual alarm source. The SUM ALM will be open if and
only if the audible alarm would be sounding if turned On; if an alternative alarm
source is available, the audible alarm is redundant.
Monitor
can
[STOP]/
[RESUME]
Enabled
A control port in monitor mode cannot command the antenna. However, it may
be desirable for safety purposes to allow the monitor to [STOP] (keyboard stop)
the antenna. If this is enabled, then any control port can stop tracking by
hitting the [STOP] key (or sending the M&C command to do this). The monitor
port can also resume tracking using [RESUME] (or via M&C). This setting does
not affect the DRIVE ENABLE button on the ACU front panel, which bypasses
the CPU and is not under software control.
Monitor
can clear
defaults
Enabled
If this is Enabled, then a port at monitor user level can execute "Clear/correct
system faults". If Disabled, ports must be at operator level to execute this
command. The user also cannot successfully execute the RC M&C C3
command.
YES/NO
default
answer
Enabled
Whenever the user is asked a yes/no question which will change the condition
of the ACU, this will be the default answer; i.e.: the answer given by simply
pressing [ENTER]. Most people prefer to set this to YES.
each time the parameter is changed, tracking is stopped or started, etc.; the
user will need to hit the [YES/NO] key to change the "NO" to "YES" on the
display before hitting [ENTER]. Some critical commands, such as resetting an
OPT target or resetting the system to ROM defaults, have a default answer of
NO regardless of the setting of this parameter.
Always
show
target
position
Disabled
When “Disabled,” the target (command) position is shown on the line
underneath the current antenna position only when repositioning the antenna to
a new target. Once the target is acquired, the target position is removed from
the display. At this point, it doesn't convey any useful information in normal
operation; also, the user can quickly glance at the ACU display and tell if it is on
target. If the target position is no longer displayed, the ACU is on target.
Turning this ON causes the ACU to always show the target position when
tracking a target. This includes all Immediate tracking... modes. Regardless of
this setting, the target position is never shown in Standby or Manual antenna
control, as it is meaningless in these modes. It is, however, shown when
manually biasing a target (see Section 5.8.2.3.1).
Command
angle
display
Position
When set to "Position", the command position is displayed beneath the current
position. When set to "Error", the command error (actual position - command
position) is displayed instead. Display of these angles is also governed by the
"Always show target position" parameter; see its help for more information.
Auto-
advance
when
editing
Enabled
When editing data, the cursor will automatically advance to the next parameter
when [ENTER] is pressed to complete editing a parameter. This makes it more
convenient when entering multiple parameters. If the current item isn't editable,
then this has no effect. If Disabled, then the cursor remains on the current
menu item, and the user must use the arrow keys to advance to the next item.
Alarm on
standby
Disabled
If enabled, an alarm condition is triggered when the ACU goes to standby.
When the ACU leaves standby mode, the standby alarm condition is reset.
5-78
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