IC54) and division resistors (R64, R66, R67, R71, R72). The signal attenuated by the attenuator circuit is con- The VGS-1 is a 3V system unit, but it can be adapted to verted to a low impedance by an output buffer (IC55), then both 3V and 5V systems for external connection devices with output from the AO pin (CN1 pin 11).
When it is used as a Land Mobile Radio transceiver, inter- It is necessary to make setting so that no signals exceed- nal data in the VGS-1 is changed to suit the Land Mobile Ra- ing 100mVp-p are input. dio transceiver, so it cannot be used as an amateur trans- If the input level lowers, S/N decreases, so the maximum ceiver.
VGS-1 SEMICONDUCTOR DATA MCU : HD6433024D01TE (IC2) Pin No. Port Name Function Remarks VCC1 3.3V BUSY Busy state output Hi : BUSY PLAY Playback state output Hi : PLAY Not used Not used Pull Down VSS1 Not used TXD1 Serial data output...
VGS-1 SEMICONDUCTOR DATA Pin No. Port Name Function Remarks A/D conversion (Voice input) 79~83 AN1~AN5 Not used Pull Down D/A conversion (Voice output) Not used AVSS Analog GND Enable input/Power save relese interruption Lo : Enable _CS3 Chip select output (IC5)
VGS-1 COMPONENTS DESCRIPTION / PARTS LIST Accessory Unit (X42-3250-60) Ref.No. Use / Fnction Opration / Condition SW : 3V→5V Level Shifting When the beat shift is operating : ON Beat Shift Switch When the beat shift is operating : OFF...
VGS-1 PARTS LIST ACCESSORY UNIT (X42-3250-60) Desti- Desti- Ref. No. Address Parts No. Description Ref. No. Address Parts No. Description parts nation parts nation CK73HB1C103K CHIP C 0.010UF RK73HB1J123J CHIP R 1/16W C92-0772-05 CHIP-TAN 10UF 6.3WV R74,75 RK73HB1J103J CHIP R...