
FAA20 Embedded NEXCOM Vocoder
Board Manual
This manual has been prepared for the Federal Aviation Administration.
FA100-00107 (March 2004) – Rev 1.0.0 Page 97
8.3.31 TONE
The TONE command sets/gets the frequency of the tone generator.
Table 42: TONE Command Syntax
ATTRIBUTE DESCRIPTION
SYNTAX TONE [freq]
PARAMETERS freq Tone Frequency. Entered as a decimal value. It is
recommended that the frequency be set to range between 0
and 0.45 Fs where Fs is the sample rate. The normal timing
sample rate is 8000 Hz. The truncated timing sample rate is
6667 Hz.. The default frequency is 0 Hz.
FLASH YES
Print current frequency setting (default value shown).
COM1: tone
> TONE = 0 Hz
EXAMPLES
Set the tone to 440 Hz.
COM1: tone 440
> TONE = 440 Hz
The test tone level is set to +3.00 dBm0. This level can be adjusted by the
linear voice mixer.
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