B&K 4070A - Manual (Page 33)

BK Precision 4070A User Manual Rev.2.2
28
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 t he "
∗
" 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 inter-digit delay between dialed digits so that the user can send a string of ASCII digit s to the
RS-232 port for speed dialing. The 4070A 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
0.1 dBm steps.
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 sig nal. 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.