SRG-1150DN / SRG-1250DN / SN-100
Power Supply
Unit
T- 451 TX FILTER
T- 454 MAIN
T- 568 KEYBOARD
T- 553 PLL
T- 552 W/K
T- 514 TX PA
T- 555 Power
supply
MF/HF ANT
SN- 100
TERMINAL
W/K ANT
Input & Output
External signal
SRG- 1150DN
Power Supply
Unit
T- 461 TX FILTER
T- 454 MAIN
T- 568 KEYBOARD
T- 553 PLL
T- 552 W/K
T- 524 TX PA
T- 555 Power
supply
MF/HF ANT
SN- 100
TERMINAL
W/K ANT
Input & Output
External signal
SRG- 1250DN
10.6 TX FILTER(SRG-1150DN : T-451, SRG-1250DN : T-461)
If TX+ 12V signal is not showed in the PCB circuit, the main PCB(T- 454) and
antenna are connected any time. And if Tx+ signal is showed, antenna is connected
sith TX POWER(SRG- 1150DN : T- 514, SRG- 1250DN : T- 524) through FILTER circuit.
At this time, a filter is selected by transmitting frequency.
10.7 SYNTHESIZER (T-553)
This circuit of PCB is divided to two part (MF/HF unit and W/K SYNTHESIZER) as
SRG- 1150DN/SRG- 1250DN FREQUENCY SYNTHESIZER.
① MF/HF unit SYNTHESIZER
PLL(IC8) and VCO(2MVCO) is output as MF/HF 1‘ st LOCAL input signal
(49.455MHZ ~ 79.4549MHZ) and 7MHz from OUTPUT of DDS3 makes 49MHZ in 7