Audio Generator Functions 3
Keysight U8903B User’s Guide 139
Dial
The dial mode allows you to generate a single DTMF tone or to modify the DTMF sequence.
Press the Mode softkey to switch between Single or Sequence as the dial mode. Press the
numeric keys on the CHANNEL/DATA panel to generate the respective DTMF tone as listed
in Table 3-27. The Dial menu page is displayed as shown in Figure 3-55.
Figure 3-55 Dial menu page
Table 3-25 Analog Generator > Waveform Config menu description (DTMF)
Menu Description
Dial
Press Dial softkey to generate a single DTMF tone or modify the DTMF sequence. Refer to “Dial” on page 139 for more
information.
Amplitude
Amplitude can be expressed as Vrms, Vpeak, Vpp, dBV, dBu, and dBm for the analog generator.
For a perfect sine waveform without any DC offset, Vpp is twice Vpeak and Vrms is equivalent to Vpeak/√2.
Ratio Ratio refers to the level difference between the high-frequency tone and low-frequency tone.
Tone Duration Tone Duration refers to the DTMF signal duration.
Tone Delay Tone Delay refers to the delay between two DTMF tones.
Pause Time Pause Time refers to the interval time for the DTMF sequence.
Repeat Press the Repeat softkey to enable or disable repeating the DTMF sequence.
Summation
Summation refers to the method to sum up two levels.
–RSS
The amplitude displayed is the Root Sum Square (RSS) summation result of the two levels. The analyzer will read the
same amplitude set at generator regardless of tone ratio.
– Linear
The amplitude showed is the linear summation result of the two levels. The level of each tone can be easily calculated
back from the tone ratio.
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