Digital Voice Systems VC-20-ATC-10B Especificações descarregar pdf (Página 64)

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 58

COMMAND TYP* DESCRIPTION OR USE

REM Forwards command text to virtual COM port.

COUNT

Prints (or clears) queue-related statistical counters.

DELAY

Prints current vocoder processing delays.

DM Writes/reads to/from DSP data memory space.

DUMP Prints named memory blocks

FRAMESIZE

Sets/gets the frame size for the PCM and NIB interfaces .

FM Writes/reads to/from flash memory.

GAM

Sets/gets audio interface gain/attenuation/mute level in Q4.12

format.

IO Writes/reads to/from DSP IO memory space.

LED

Controls mapping of virtual LEDs to the six available physical

LEDs.

LOOP

Controls audio, PCM, and nibble external loop status.

MACRO Enables the user to build a command sequence which can be

played on command or continuously.

MIX

Controls the linear voice mixer. Data values are entered in

Q1.15 format.

PROG

Prepares the FAA20 to accept a new software program.

RESET

Forces a hardware reset by stopping service to the on-board

watchdog timer.

ROUTE

Controls the compressed voice router

TEST

Accesses a number of FAA20 test features.

TONE

Controls the frequency of the on-board tone generator.

TRUN

Enables/disables truncated timing mode.

VERSION

Prints software version information and unit serial number.

VOC

Access vocoder controls and status.

WAIT Causes the command processor to wait (units = ms).

* TYP = Typical. The checked commands are used by typical FAA20 integrators. The unchecked

commands are primarily used at the factory and are rarely used by FAA20 integrators.

Many commands enable you to set/get parameter status. Typically, to set

the parameter an additional token is provided in the command line, i.e. the

new parameter value. If this token is omitted the current parameter status

is retrieved and displayed. For example, the command ‘ADAPT’, gets the

current parameter setting. The command ‘ADAPT ON’ sets the parameter,

enabling the rate adapter for truncated timing.

Some parameter settings can be saved to flash memory (non-volatile) and

are thus retained between power cycles. These settings are explicitly

saved to flash when the user enters the ‘CFG SAVE’ command. Each

command syntax tables contain a flash attribute which indicates whether

the parameter is saved to flash memory.

Either lower or upper case can be used to enter commands. The FAA20

converts all lines to upper case. All FAA20 responses are prefixed with the

greater than symbol ( > ). All commands and responses are terminated

by a carriage return and all communication is conducted in ASCII format.

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