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Chapter 8, Signaling Decoder Screen
Tone Sequence Decoder
Off Time
This measurement column lists the length of time each tone was “off” prior to the
next tone being received.
On Time
This measurement column lists the length of time each tone 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.
Stop Meas
Selecting this field stops the analyzer when making single measurements.
Sym
The symbol column corresponds to the Tone Sequence Encoder’s symbols
assigned for each tone. As each tone is analyzed, the symbol that represents each
tone is listed in this column.
Operating Considerations
The symbol assigned to a received tone is based on the closest symbol frequency
to that tone. If the frequency of the received tone is exactly half-way between two
symbol frequencies, the symbol associated with the higher of the two frequencies
is displayed.
Trig Level
Trigger level indicates the minimum signal level required to begin a measurement
that has been “armed.” The level is adjusted by changing the
Input Level field
setting.
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