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S:\HP892XX\USRGUIDE\manual\decoscrn.fb
Chapter 8, Signaling Decoder Screen
Dual-Tone Multi-Frequency (DTMF) Decoder
Lo Tone
This measurement field lists the frequency or frequency error for the low
frequency tone in each tone pair. The measurement type is selected by selecting
the
Freq field to display a list of measurement choices.
Operating Considerations
Frequency error is calculated by comparing the DTMF Encoder’s frequency
settings for each tone pair with the decoded frequencies.
See Also
"Using the DTMF Decoder" on page 294
Off Time
This measurement column lists the length of time each tone pair was “off” prior to
the next tone being received.
On Time
This measurement column lists the length of time each tone pair was “on.”
Single/Cont
This field specifies how you want the analyzer to be armed:
• Single is used to analyze and display the decoded information once each time
Arm Meas is selected.
• Cont is used to automatically re-arm the analyzer and display the measurements on a
continual basis until Single is selected.
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