Service manual

293
SEP 2006
Ver. 1.1
DP-8020E/8020P/8016P
5.2.5.3. DTMF Signal
This Service Mode is used to check the DTMF (Dual Tone Multi Frequency) signal output.
The DTMF signal can be generated using the following procedure.
• DTMF Single Tone
Press the “V”, ”/\” arrow keys to select the "4: MODEM Test" on the display.
↓
Press the “SET” key to select the "3: DTMF Test".
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Press the “SET” key.
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Press the “V”, ”/\” arrow keys to select the "1. Single".
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Press the desired number, and press the "START" key.
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Press the “STOP” key twice to exit the service mode.
• DTMF Dual Tone
Press the “V”, ”/\” arrow keys to select the "4: MODEM Test" on the display.
↓
Press the “SET” key to select the "3: DTMF Test".
↓
Press the “SET” key.
↓
Press the “V”, ”/\” arrow keys to select the "2. Dual".
↓
Press the desired number, and press the "START" key.
↓
Press the “STOP” key twice to exit the service mode.
DTMF Single Tone Table DTMF Dual Tone Table
Number DTMF Signal Tones Number DTMF Dual Tones
1 697 Hz 0 941 Hz + 1336 Hz
2 770 Hz 1 697 Hz + 1209 Hz
3 852 Hz 2 697 Hz + 1336 Hz
4 941 Hz 3 697 Hz + 1477 Hz
5 1209 Hz 4 770 Hz + 1209 Hz
6 1336 Hz 5 770 Hz + 1336 Hz
7 1477 Hz 6 770 Hz + 1477 Hz
8 1633 Hz 7 852 Hz + 1209 Hz
8 852 Hz + 1336 Hz
9 852 Hz + 1477 Hz
* 941 Hz + 1209 Hz
# 941 Hz + 1477 Hz