Single Band DDS VFO 1..160 MHz based on Si5351. Assembled unit.

Description

Assembled unit!
Technical description:
·         Rotary encoder tuning
·         Selectable tuning steps – 5Hz, 50Hz, 100Hz, 1kHz, 5KHz, 10kHz, 100 KHz, 1 MHZ
·         Simultaneous VFO and BFO oscillator outputs (could be customized in menu)
·         S-meter display function
·         VFO lock function – to prevent unwanted frequency shift due to vibration or knocks
·         Band up/down selection – 9 bands
·         Programmable start-up frequencies
·         Atmel AtTiny processor
·         16 x 2  compact LCD
·         Programmable si5351a reference crystal offset frequency
·         Low current – Less than 30mA at 3.3V including any LCD backlighting
·         Input voltage - 7..15V
- dimensions: 80х35 мм
menu "custom settings and calibration".
In the new firmware version through the menu user can change the following settings:
- the value of IF (+IF, -If, IF=0):
- change the frequency reference generator or power down the output CLK1
- Accurate calibration of the synthesizer
- Self-adjustment of the start-up frequency when you turn on the synthesizer
Synthesizer can be used as a local oscillator (VFO) and reference generator (BFO) in the Amateur radio receiving and transmitting structures with a single frequency conversion, and as a local oscillator (VFO) in the construction of direct frequency conversion
Encoder is included!