Digital Voice Systems VC-20-ATC-10B Especificaciones Pagina 17

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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 11
3.4 LED Indicators
Table 4 describes the default LED indicator assignments. The FAA20
supports programmable functions for the LEDs. For more information on
LED assignment, see Section 5.4.3.
Table 4: LED Indicators*
LED ASSIGNMENT DESCRIPTION
LED1
(red)
LANYP Audio Peak Indicator. Lights when audio signal level
reaches the peak threshold, i.e. +3 dBm0.
LED2
(yellow)
LANYA Audio Activity Indicator. Lights when audio signal level
reaches the peak threshold, i.e. -36 dBm0.
LED3
(green)
TRUN Truncated Timing Indicator. Lights when truncated timing
mode is active.
LED4
(red)
ERR Error Indicator. Lights when an error is detected. Lights for
each sample/packet added or deleted as a result of timing
differences..
LED5
(yellow)
VAD Vocoder Activity Indicator. Lights when voice is detected at
the encoder and the encoder is running ORwhen voice
is detected at the decoder and the decoder is running.
LED6
(green)
RUN Run Indicator: Blinks when the FAA20 is operating
normally. The blink rate indicates processor loading. Note:
This indicator is NOT related to the RUN signal provided on
the DIN connector.
* Default assignments shown. For information regarding LED assignment, refer to Section 5.4.3.
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