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Home		DTMF Tone Generator DTMF-1 provides DTMF characters variable twist, impedance, level download a full specification in pdf format The DTMF tone Generator DTMF-1 generates a source of DTMF digits, either singly or a string. Front panel digit entry is via a keypad, and other controls selct the twist, frequency deviation, pause, and output level. Monitoring of the tones and subsequent line traffic is achieved by the built-in loudspeaker. Output impedance is front panel selectable, and automatic redial saves repeated digit entry. Specification DTMF Digits numbers 0 - 9 characters * and # letters A - D Twist set to 1, 2, and 3 dB variable -5dB to +5 dB Frequency Deviation deviation = 1.5% set to Hi Hi Lo Lo or Hi Lo Lo Lo or Hi Hi Lo Lo or Hi Lo Lo Hi or no deviation Pause between 3rd and 4th digits 2 - 4 seconds increment = 0.5 seconds Output Connectors 2 off 4mm screw terminals 1 off line socket Output level variable to 0dBV or preset to -10 dBV normal digit string or individual digits or continuous dual tone digit burst = 100mS inter-digit gap = 100mS Monitor variable volume speaker Dimensions 425mm x 260mm x 95mm
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DTMF-1