WX-950
Installation Manual
A-4
Rev. C
SIGNAL CHARACTERISTICS
Heading Valid Indicates that the heading source is providing valid heading information.
NOTE
The active polarity (i.e., HEADING FLAG (+) or HEADING FLAG
(-)) is selected via the FLAG jumper located in the connector back-
shell. The line is debounced via software.
CONNECTION J1-6 (HDG FLAG+)
J1-19 (HDG FLAG-)
CABLE See paragraph 2.7.3.
VOLTAGE High Sense (FLAGHI - FLAGLO):
Min: 5.0V
Max: 30.0V
Low Sense (FLAGHI - FLAGLO):
Min: -30.0V
Max: 1.0V
INPUT IMPEDANCE >2k Ohm
INPUT CURRENT Active: Min: 1mA
Max: 15mA
Remote Clear This input may be connected to an external switch (normally a yoke
mounted switch). When activated, this switch performs the same function
as the lower left softkey. When activated in weather mode, the strike
buffers are cleared and all displayed lightning strikes are erased. This
input is diode isolated and debounced. This input will perform any
function indicated for the same lower left softkey in other modes.
CONNECTION J1-18 (
SOFTKEY E )
CABLE Minimum 22 AWG wire.
VOLTAGE Active: Min: 0.0V
Max: 1.5V
Inactive Min: 3.5V or Open
(Internal 4.7K pull-up)
Max: 5.0V
Inhibit This input may be connected to the switch on the microphone of the
aircraft’s communications transmitter. When it is active, strike processing
is disabled to prevent transmitted signals from corrupting the storm data.
This input is diode isolated.
NOTE
The inhibit line is not needed if the Stormscope antenna and
communications antennas are on opposite sides of the fuselage.
CONNECTION J1-1 ( INHIBIT
)
CABLE Minimum 22 AWG wire.
VOLTAGE Active: Min: 0.0V
Max: 0.7V
Inactive Min: 2.4V
Max: 28.4V
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