BNC 630 - Manual (Page 43)

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5.24 Dualtone Generation Mode
Introduction
The Dualtone Generation mode generates an output signal which is the sum of two sinusoids of equal amplitude. The frequency of
each sinusoid may be individually specified with 1 Hz resolution. In addition, a phase offset may be specified which offsets the
phase of one sinusoid with respect to the other.
The resulting dualtone waveform may be gated on and off for specified intervals. This feature allows the user to pulsate the tone,
which can be especially useful when generating cadenced signals such as a busy tone, ringback, etc.
This mode is available under the “other” modes menu. To enter the Dualtone Generation mode, press Mode, Clear, 2
Dualtone Generation Mode Parameters
The Dualtone Generation mode has the following front panel display:
Figure 5.24-1: Dualtone Generation mode display
1. Tone 1 Frequency
In this field enter the frequency of the first sinusoid. You may enter from 0 Hz (DC) to 10.000 KHz in 1 Hz steps.
2. Tone 2 Frequency
In this field enter the frequency of the second sinusoid. You may enter from 0 Hz (DC) to 10.000 KHz in 1 Hz steps.
3. Phase Offset
In this field enter the phase offset from the first sinusoid to the second. The sinusoid of Tone 1 is advanced by the specified phase
relative to Tone 2. This parameter is useful when the frequencies of the two tones are harmonically related and a specific phase
relationship between the two is desired. You may enter from 0 degrees to 359 degrees in 1 degree steps.
4. Output “On” time
In this field enter the amount of time for the output to remain on. If you wish a continuous output, any value may be specified
here, but you will need to set the “off” time to 0 mS. You may enter an ON time from 1 mS to 10.000 Sec in 1 mS steps.
5. Output “Off” time
In this field enter the amount of time for the output to remain off. If you wish a continuous output, set this value to 0 mS. You may
enter an OFF time from 0 mS to 10.000 Sec in 1 mS steps.
Dualtone F1: 10,000 Hz F2: 5,000 Hz Ø: 123
Ton: 10,000 mS Toff: 5,000 mS -10.0 dBm
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