BNC 630 - Manual (Page 34)

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DTMF Generation Mode Parameters
The DTMF Generation mode has the following front panel display:
Figure 5.16-1: DTMF Generation mode display
1. Generated DTMF Digit
The last DTMF digit that was generated is displayed in this field. To generate a DTMF digit, the cursor must be either in this field
or the OFF position. If the cursor is in any other field (i.e. Delay or Duration fields) then the keypad functions to enter those
parameters.
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 ( - ) key.
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 630 will delay generation of the DTMF tone by the time specified in this field. This parameter is used primarily to add an
inter-digit delay between dialed digits so that the user can send a string of ASCII digits to the RS232 port for speed dialing. The 630
will insert the specified delay between the dialed digits. You may enter a value from 0 mS to 10,000 mS (10 seconds) in 1 mS steps.
4. Level
In this field enter the output level, from 4 mVp-p to 10 Vp-p in 1 mV steps or from -44.0 dBm to +21.0 dBm in .1 dBm steps.
NOTE: The level specified is a 50 ohm LOADED level. This is the level of the signal which will appear across a 50 ohm 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 waveform. For more information on output offsets refer to section 4.4.
Ext Gating Input
(rear panel connector)
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.
DTMF generation: # Duration: 200 mS
Delay: 1,000 mS Level: -10.0 dBm
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