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Chapter 1 - Introduction and Specifications
WX-200 Weather Receiver
The WX-200 is a highly sensitive, quality receiver, with good front-end protection designed to
function in the high RF environment typical of many repeater sites. A digital decoder responds to
Specific Area Message Encoded (SAME) alerts transmitted by the NOAA weather station located in
your geographic area. Select your county code and the type of alert. Select warnings and or
watches. During a weather alert, a relay in the WX-200 will disconnect the transmitter from the
controller and connect it to the weather receiver. The relay provides a ground for the transmitter PTT
line. Weather audio will be transmitted for the period of the alert announcement. A programmable
alert timer provides back-up protection.
Weather Alert Log
As alerts are received the WX-200 stores the date, time and type of alert in non- volatile memory.
Storage space is provided for forty alerts. Use the RS-232 port and the WX-200 configuration
program to down load the data. A print driver is also provided.
Alert Start Logic Output (J3-7)
An ALERT START output provides a TTL logic high two second pulse when a weather alert is received.
This output can be used to set off an external alarm or trigger the controller to execute a macro or
load a “SEVERE WEATHER ALERT” memory save.
Alert Stop Logic Output (J3-6)
Included in the digital packet is the length of the severe weather alert. The WX-200 stores this
information and generates a stop logic output when the time period has expired. An ALERT STOP
output provides a TTL logic high for one second. This output can be used to trigger the controller to
reload the “NORMAL” memory save.
Weather Enable Input (J3-9)
When this input is grounded the weather receiver will activate. When connected to a controller's user
function output switch, weather reports on demand are available.
Weather Disable Input (J3-4)
When this input is grounded the WX-200 will not respond to weather alerts issued by the NOAA
weather station. Once a “Sky Warn Net” is activated, it may be desirable to stop any additional
alerts. When this input is momentary grounded, the WX-200 will reset, canceling an alert.
Alert Message Timer Selection
At the conclusion of an alert message the weather station send a digital termination packet. The WX-
200 decodes this packet and turns the transmitter off. If the weather station fails to send the
termination packet the alert message timer will take over. Select this time with the WX-200
configuration program.
