Garmin GAD 42 Maintenance Manual - Page 13

HEADING X HEADING Y REMOTE CRS SELECT X/COS REMOTE CRS SELECT Y/SIN TRUE AIRSPEED X/SIGNAL TRUE AIRSPEED Y/REFERENCE RESERVED (SPARE X IN) RESERVED (SPARE Y IN) 11-33 VDC AIRCRAFT PWR/GND 26 VAC INDICATOR REF HI 26 VAC INDICATOR REF LO TRUE AIRSPEED REF HI TRUE AIRSPEED REF LO RESERVED (26 VAC SPARE REF HI) RESERVED (26 VAC SPARE REF LO) 26 VAC STEERING REF HI 26 VAC STEERING REF LO DISCRETE INPUTS (26) RS 232 IN (test) SELECTED CRS RS 422 IN A SELECTED CRS RS 422 IN B RADAR GRAPHICS ARINC 429 IN A RADAR GRAPHICS ARINC 429 IN B GPS ARINC 429 IN A GPS ARINC 429 IN B NAV ARINC 429 IN A NAV ARINC 429 IN B HEADING ARINC 429 IN A HEADING ARINC 429 IN B FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN MAIN P/S 5V P/S BACKUP CAPS FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN FILTER/ATTEN LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER SYNC RECTIFIER CONVERT 4 CHANNEL 12 BIT ADC 4 CHANNEL 12 BIT ADC CONVERT INTERNAL VBACKUP MONITOR INTERNAL +20V MONITOR INTERNAL -20V MONITOR INTERNAL +12V MONITOR INTERNAL -12V MONITOR INTERNAL +5V MONITOR INTERNAL -5V MONITOR SYNC RECTIFIER SYNC RECTIFIER 11 CHANNEL 8 BIT SERIAL ADC SYNC RECTIFIER SYNC RECTIFIER (19) DRIVER (7) FPGA SERIAL CONVERTER RXDO TXDO MICROPROCESSOR RXD1 TXD1 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC 12 BIT MULTIPLYING DAC FPGA DECODE LOGIC 256K X 16 FLASH 256K X 16 FLASH FILTER FILTER FILTER FILTER FILTER FILTER FILTER LATCH (4) AMPLIFIER AMPLIFIER AMPLIFIER AMPLIFIER AMPLIFIER AMPLIFIER AMPLIFIER DRIVER DRIVER DRIVER DRIVER DRIVER (4) DRIVER DRIVER DRIVER DRIVER MAIN RMI DRIVE X/OBI DRIVE COS MAIN RMI DRIVE Y/OBI DRIVE SIN SELECTED CRS DRIVE X/COS SELECTED CRS DRIVE Y/SIN NAV RMI DRIVE X/OBI DRIVE COS NAV RMI DRIVE Y/OBI DRIVE SIN ROLL STEERING HI ROLL STEERING LO/GROUND MAIN RMI/OBI SUPERFLAG NAV RMI/OBI SUPERFLAG STEERING SUPERFLAG ARINC 561/568 SUPERFLAG DISCRETE OUTPUTS RS 232 OUT (TEST) NAV CSDB OUT A NAV CSDB OUT B GPS ARINC 429 OUT A GPS ARINC 429 OUT B HIGH SPEED ARINC 429 OUT A HIGH SPEED ARINC 429 OUT B DISTANCE INDICATOR CONTROL FPGA ENCODE LOGIC SELECTED CRS CONTROL ARINC 561/568 CLOCK ARINC 561/568 DATA ARINC 561/568 SYNC DRIVER LEVEL SHIFT ARINC 561/568 CONTINUOUS CLOCK KING SERIAL DATA KING SERIAL CLOCK KING SERIAL SYNC GAD 42 MAINTENANCE MANUAL P/N 190-00159-01 Figure 1. GAD 42 Block Diagram Page 12 Rev. A