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Chapter 10, Signaling Encoder (AF Generator 2)
Tone Sequence Encoder
Symbol Definition
Symbol Sequence
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This table specifies three types of information:
•
Sym, symbol numbers, indicate the hexadecimal number that represents each tone
when creating a tone sequence. These numbers cannot be changed.
•
Freq Hz lists the tone frequency associated with each symbol number. The frequency
values are preset for the Standard you are using. You can change the values using
the DATA keys.
•
lists the relative amplitude for each tone. Amplitude is based on a percentage of the
level shown in the AFGen2 To field.
This area performs two functions:
•
The Symbol Sequence field at the top of the screen is used to enter and edit the tone
sequence. The sequence uses the symbol numbers (Sym) listed in the Symbol Def-
inition table. A total of 16 symbols can be entered.
•
Below the Symbol Sequence is the sequence on/off times table. This table contains
three entries:
Seq Num identifies which position in the Symbol Sequence is affected by
the On and Off times listed.
On Time specifies the length of time a tone is output during the sequence.
Off Time specifies the length of time a tone is off before the next tone in the
sequence is output.
Operating Considerations
The symbol numbers can be entered directly, using the DATA keys, or by using
the
menu that appears when this field is selected. The
Choices
also used to edit an existing sequence.
The on and off times are changed using the DATA keys.
menu is
Choices
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