Intended primarily to operate as the “Audio Terminal” of Radio Systems using the DBS 800 Digitally-integrated Baseband System, the FX806A is a PMR Audio Processor which meets EIA and CEPT audio specifications.
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FX806A AUDIO PROCESSOR
POWER SUPPLY
CALIBRATION INPUT
#
(TX) MIC. IN
MIC. & VOGAD AMPS
LOW & HIGHPASS
FILTERS
INPUT PROCESS
#
(RX) AUDIO IN
DE-EMPHASIS FILTER
XTAL/CLOCK XTAL
CLOCK GENERATOR
CHIP SELECT
SERIAL CLOCK
COMMAND DATA
C-BUS INTERFACE
MAIN PROCESS
OUT
#
VOGAD SENSE
#
VOGAD SENSE
#
#
GAIN SET
BUFFER
#
#
VOGAD SENSE
#
#
#
PRE-EMPHASIS LIMITING FILTERING
GAIN SETTING
MAIN PROCESS
# indicates logic control
To EXTERNAL AUDIO EXTERNAL AUDIO
PROCESSES
PROCESS IN
SUM OUT
MOD. IN
PRIMARY and
SECONDARY AUDIO INPUTS ——— Voice.
Sub-/Audio Tone. FFSK. etc.
#
ATTENUATOR
MODULATION 1 OUT
TRANSMITTER
#
MODULATION
DRIVES
ATTENUATOR
MODULATION 2 OUT
MODULATION SUMMING AMP
OUTPUT DRIVES
#
ATTENUATOR
LOUDSPEAKER AUDIO
Fig.
FX806A Datasheet
