Midian’s MTSD-3 is a tunable two-tone decoder. This product utilizes 2 tuning pots to set the two-tone frequencies. The MTSD-3 has a wide frequency range to accommodate most two-tone formats. The MTSD-3 can replace Communication Specialists’ SD-1000 and Selectone’s ST-200.

It can be used to activate emergency sirens or other equipment. Two of these can be used in parallel to decode 2+2 Aircraft Call.

• A version: 280 – 1600 Hz
• B version: 500 – 2800 Hz
• Momentary & latched outputs