STM32 Si5351 VFO BFO frequency syntheresizer supports VFO A / VFO B, with USB / LSB / CW modulation,
no AM or FM.
It is based on STM32F103C8T6 and Si5351 with 1.8" TFT LCD. It is designed by UT5QBC and UV7QAE.
Specifications:
1. TX /RX frequency band
160m 1810000Hz - 2000000Hz
80m 3500000Hz - 3800000Hz
40m 7000000Hz - 7300000Hz
30m 10100000Hz - 10150000Hz
20m 14000000Hz - 14350000Hz
17m 18068000Hz - 18168000Hz
15m 21000000Hz - 21450000Hz
12m 24890000Hz - 24990000Hz
10m 28000000Hz - 28700000Hz
10m 28700000Hz - 29700000Hz
6m 50000000Hz - 54000000Hz
4m 70000000Hz - 72000000Hz
each frequency band can be turned ON or OFF in SYSTEM MENU
2. VFO mode = VFO /VFO x2 / VFO x 4 / QUADRATURE / VFO = Frequency
BFO mode = +BFO / -BFO
A. if VFO mode = VFO, BFO mode = +BFO
Si5351 CLK0 frequency output = VFO = display frequency (on TFT LCD) + VFO, CLK1 = BFO
B. if VFO mode = QUADRATURE
LSB MODE
CLK0 = freq (phase 0 °)
CLK1 = freq (phase 90 °)
USB MODE
CLK0 = freq (phase 90 °)
CLK1 = freq (phase 0 °)
3. Tunning step = 1Hz / 10Hz / 100Hz / 1000Hz
4. CAT support requires a USB UART, 3.3V signal level is needed
Prorocal = Kenwood TS-440s or TS-480 57600, 8, N, 1
5. BCD D1 D2 D4 D8 3.3V signal output to control Band Pass Filter or Low Pass Filter
6. Short press FUN key to enter USER MENU, long press FUN key to enter SYSTEM MENU