0-55MHz AD9850 DDS Signal Generator Shortwave Radio Wave Band Module for HAM Radio SSB6.1 Transceiver VFO SSB

Introduction This is a finished product DDS digital direct input frequency with the volume potentiometer potentiometer amplifier gain bandwidth potentiometer AGC potentiometer S LED table display a standing wave LED table display Feature 12V input12V outputStanding wave power into the detection signal Common groundManual gain controlBandwidth power regulation altogetherThe corresponding motherboard microphones horn PPT and the CWThe mainboard control mode and bandDDS test power supply no need weldingUse debug settings The external button wiring methods In Fig KB 2 and KB 1 is an external key interface which is the first leg leftmost respective interface common pin which were co phase four feet their respective functions such as KB 1 1 2 connected to complete work mode control switching functions such as KB 1 1 4 is connected to enable adjustment of stepping ENC image above coding switch feet which under the view of the switch of A contact pin 2 KB 2 and the drawing of B then KB 2 Pin 3 the drawing of C continued on the KB 2 1 foot Work mode and band control function Due to the limited capacity of the microcontroller itself drive or external relay operating voltage is different not directly drive a relay drivers need to work mode and operating band needs an external drive circuit a specific circuit can refer to other materials LCD backlight connection Taking into account the number of people may use their own configuration LCD display LED