Several keys on the front panel are used to generate DTMF digits other than “0” to “9”. They are listed here: To generate the "#" DTMF digit, press the minus
To generate the " ∗" DTMF digit, press the period (.) key. To generate the "A" DTMF digit, press the é key.
To generate the "B" DTMF digit, press the ê key. To generate the "C" DTMF digit, press the è key. To generate the "D" DTMF digit, press the ç key.
2. DTMF Duration
The DTMF tone will remain on for the time specified in this field. You may enter a value from 1 mS to 10,000 mS (10 seconds) in 1 mS steps.
3. DTMF Delay
The 4070A will delay generation of the DTMF tone by the time specified in this field. This parameter is used primarily to add an
4. Level
In this field enter the output level, from 4 mVp
NOTE: The level specified is a 50O loaded level. This is the level of the signal, which will appear across a 50O load connected to the SIG Out connector. Into an open circuit, the output swing will be twice the value entered.
Offset
You can enter an offset voltage for the output signal. For more information on output offsets refer to section 4.4.
Ext Gating Input
This TTL compatible input can be used to gate the output signal on or off. A logic high voltage turns off the output. For further information on the Ext Gating Input, refer to section 2.0.
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BK Precision 4070A User Manual Rev.2.2