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Chapter 8 271
Signaling Encoder and Decoder - Screens and Control Fields
Control Fields for the Signaling Encoder and Decoder
Mode
This field is used to choose which of the Test Set’s Decoder screens to
display.
Func Gen
DTMF
AMPS-TACS
NAMP-NTAC
Screens Where Field is Present
SIGNALING DECODER (All Modes)
SIGNALING ENCODER (All Modes)
Num of Bits
This field lists the total number of bits displayed. This number is
dependent on Data Rate of the signal being decoded, the Gate Time of
the decoder, and the size of the decoder’s data buffer.
Operating Considerations
The buffer has a maximum capacity of:
• 1584 bits for decoding Reverse Voice Channel (RVC) data streams.
• 1583 bits for decoding Reverse Control Channel (RECC) data
streams.
This measurement is not available for NAMPS-NTACS RVC decoding.
See Also
“Gate Time” on page 265
Screens Where Field is Present
SIGNALING DECODER (Modes: AMPS-TACS, NAMP-NTAC)
Off Time
For the encoder, this field sets the length of time each DTMF tones is off
during the sequence.
For the decoder, this measurement column lists the length of time each
tone is “off” prior to the next tone being received.
Screens Where Field is Present
SIGNALING ENCODER (Modes: DTMF)
SIGNALING DECODER (Modes: DTMF)