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280 Chapter 8
C:\Spk\Ref\RefGuideRevE\Enc-dec.fm
Signaling Encoder and Decoder - Screens and Control Fields
Control Fields for the Signaling Encoder and Decoder
Example 8-6 Example 4:
3 kHz deviation, Twist 2.5 dB, Pre-emphasis on.
If sending a 1 (697 Hz low tone and 1209 Hz high tone), the high tone’s
deviation is 1.334 (see “Example 2:” on page 279) × 1.735 (see “Example
3:” on page 279) approximately 2.314 times the low tone’s deviation.
Since the peak deviation of their sum is 3 kHz, the low tone’s deviation
is 905.5 Hz and the high tone’s deviation is 2094.5 Hz.
Screens Where Field is Present
SIGNALING ENCODER (Modes: DTMF)
Waveform
This field selects the desired waveform for AF Generator 2. The
available waveforms are as follows:
•Sine wave
• Square wave
• Triangle wave
• Ramp (positive-going and negative-going)
•DC±
• Universal Noise
• Gaussian Noise
Screens Where Field is Present
SIGNALING ENCODER (Modes: Func Gen)