BNC 630 - Manual (Page 44)

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6. 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.
Dualtone Examples
The following table lists the parameters for some common dualtones used in the American Telephone Network.
Name Frequency 1 Frequency 2 On Time (Ton) Off Time (Toff)
Dial Tone 350 Hz 440 Hz 1 mS 0 mS
Ringback 440 Hz 480 Hz 2,000 mS 4,000 mS
Busy 480 Hz 620 Hz 500 mS 500 mS
Reorder 480 Hz 620 Hz 250 mS 250 mS
DSN Preempt 440 Hz 620 Hz 1 mS 0 mS
European 420 Hz 440 Hz various various
Note: The Phase Offset field value may be set to any value too properly generate these tones.