NORTHROP GRUMMAN NAVIGAT X MK 1, Руководство по эксплуатации, установке и обслуживанию

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NAVIGAT X MK 1 056343/C
Configuration Menu (Service Setup 1) 7-15
K1 Mute/Hdg-Diff
Speed Filter
Configures the funcion of the alarm relay K1 output
Settings: Hdg-Diff
Relay K1 is used to signal the heading difference alarm con-
dition. This option must be selected in multicompass sys-
tems which route the individual compasses’ hdg-diff alarm
relay outputs to a central alarm facility.
Mute
Relay K1 is used to mute an audible alarm generated by a
central alarm facility. When this option is selected, relay K1
is actuated whenever an alarm is acknowledged or muted
locally at the NAVIGAT X MK 1.
In multicompass systems which also require a heading dif-
ference alarm output, a separate compass monitoring
device, such as the NAVITWIN IV, must provide the heading
difference alarm.
Sets the filter parameters used for the North speed error correction.
The preset factory defaults should not normally be altered. In high-
speed craft, however, it will be necessary to increase the maximum
speed value to prevent rejection of valid high speed values.
Settings: T. Const.
filter time constant: 0 – 99 s (default = 20 s)
The filter time constant determines the level of filtering
applied to the incoming speed before it enters the calcula-
tion of North speed error correction.
Occasional dropouts and glitches will be completely blocked
for a duration of up to the time constant’s value.
At the same time, the effects of steady acceleration or decel-
leration are smoothed out. After a change of speed, a new
constant speed will enter the error correction routine with a
delay of approximately five times the time constant.
Speed Min.
minimum speed value: -99.9 – +99.9 kn (default = -5.0 kn)
The minimum speed value determines the lower limit of the
valid speed range. Actual speeds below the limit will be
rejected. Should the actual speed remain below the limit for
more than 10 s, a “speed invalid” alarm will be given.
Speed Max.
maximum speed value: -99.9 – +99.9 kn (default = 30.0 kn)
The maximum speed value determines the upper limit of
the valid speed range. Actual speeds above the limit will be
rejected. Should the actual speed remain above the limit for
more than 10 s, a “speed invalid” alarm will be given.