Tuesday, September 15, 2009

Siren Controller - Live Test Successful

The live test of the Weather Message Siren Controller was completed today in Lee County Alabama. The software sent the DTMF commands to rotate a selected siren and it rotated. This test was unique in that it used the computer's sound card to generate the DTMF and the serial port to key the radio.

Tom Moore, WX4TM, Lee County EMWIN Coordinator called me this morning to deliver the good news. Frank McLemore, N4TKT, with Communication Electronic Services adjusted the sound levels on the computer interface. Once the deviation was set properly the individual siren controllers responded.

The software can generate DTMF, two-tone, and group call tones using the sound card. This added feature gives users a mix of different signaling capability. All of the signaling methods can be used to activate different devices all at the same time.

The software continues to support external encoders to meet the requirements of different users. They tested the Motron TC1/MX with success. The Motron TC1/MX is an external DTMF encoder.

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