This circuit has been found in older telecommunications documentation. Its purpose is to produce a tone that can be sent and recognized by a remote station. This tone can be used for triggering or recognition. For 1000 Hz C1 must have 220 nF.
This circuit has been found in older telecommunications documentation. Its purpose is to produce a tone that can be sent and recognized by a remote station. This tone can be used for triggering or recognition. For 1000 Hz C1 must have 220 nF.