VFO/BFO STM32F103C8T6 Si5351 Deskripsi

VFO/BFO STM32F103C8T6 berikut ini sangat cocok di gunakan pada Transceiver / Receiver pada band HF. Di desain oleh Amateur Radio dari Ukraina yaitu UT5QBC dan UV7QAE .  Menggunakan STM32F103C8T6 sebagai microcontroller, dan display dengan ukuran 1,8" . Pcb juga didesain cukup kecil ( 10cm x 5cm) sangat cocok untuk membuat Transceiver Qrp pada kegiatan outdoor.

RX / TX frequency bands:

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

Band yang tidak diperlukan bisa di nonaktifkan sesuai kebutuhan melalui system Menu. Pada menu no 22. WIDEBAND MODE  No/Yes  >>> Continuous Transmit / Receive Range

The frequency tuning step is TRX 1Hz, 10Hz, 100Hz, 1000Hz.

Double conversion mode, only with an external oscillator,

VFO = current_freq + external_oscillator + BFO.

Quadrature frequency output for devices constructed using the direct conversion scheme.

VFO MODE = QUADRATURE.

Output:

LSB MODE

CLK0 = freq (phase 0 °)

CLK1 = freq (phase 90 °)

USB MODE

CLK0 = freq (phase 90 °)

CLK1 = freq (phase 0 °)

Output CLK0 - frequency VFO.

Out CLK1 - SSB BFO frequency.

Out CLK2 - frequency CW BFO

You can set the frequency with reverse transmission in "SYSTEM MENU" option "TX REVERSE".

The signals at the outputs of the option " TX OTPUT REVERSED" = ON

Up, Dn - Up, down the ranges menu.

Mode - LSB Shift, USB, CW in the operating mode, the menu for fast input frequency.

Menu - Input / Output menu.Selecting the functions of the buttons in the "SYSTEM MENU" option "BUTTON MODE".

VFO A / VFO B - Two VFOs (VFO A / VFO B), SPLIT.

FUN - additional options, synthesizer functions - Control ATT (on / off), PRE (on / off), AGC (on / off), lock

Entrance to the "USER MENU" short press Menu button.

Entrance to the "SYSTEM MENU" press and hold the Menu button more than 1sec.

USER MENU.

01.STEP FREQUENCY TUNING 1/5/10/50/100/500/1000 Hz Step frequency tuning

02. CW SHIFT 100Hz - 1500Hz The tone of the CW reception.

03. ENCODER DYNAMIC SPEED ON/OFF Dynamic speed frequency hopping.

04. TX TIMEOUT 0ms - 1000ms The delay time after releasing the key before switching to reception.

05. AF SPECTRAL ON/OFF enable/disable AF SPECTRAL.

06. SPECTRUM DESAY 0 – 4 Adjustment of the speed of the decay of the spectrogram 0 - 4.

SYSTEM MENU.

01.ENCODER REVERSED YES/NO. Reverse encoder.

02. TX OTPUT REVERSED ON/OFF Reverse Output frequency VFO and BFO transmission.

03. VFO MODE OUTPUT VFO / VFOx2 / VFOx4 / QUADRATURE / VFO=FREQ

04. BFO MODE OUTPUT +VFO / -VFO

05. BFO OUTPUT DISABLE No / Yes enable/disable frequency BFO for CLK1

06. DOUBLE CONVERSION No / Yes

07. EXTERNAL OSCILLATOR 39000000 Hz

08. FREQUENCY BFO LSB 100kHz - 100mHz IF rate LSB.

09. FREQUENCY BFO USB 100kHz - 100mHz IF rate USB.

10. FREQUENCY CNTR CW 100kHz - 100mHz IF rate CW.

11. FREQUENCY XTAL Si5351 100kHz - 100mHz Clock frequency Si5351a (correction).

12. OUTPUT CURRENT CLK0 2/4/6/8 Adjustable output voltage CLK0 setting output current.

13. OUTPUT CURRENT CLK1 2/4/6/8 Adjustable output voltage CLK1 setting output current.

14. S-METER 0 200mv Calibration S Meter.

15. S-METER 1 1000mv Calibration S Meter.

16. S-METER 5 2000mv Calibration S Meter.

17. S-METER 9 2500mv Calibration S Meter.

18. S-METER +60db 3100mv Calibration S Meter.

19. P-METER 0 0000mv Calibration Power Meter.

20. P-METER 50 1500mv Calibration Power Meter.

21. P-METER 100 3000mv Calibration Power Meter.22. WIDEBAND MODE No / Yes Continuous transmit / receive range

23. BAND 160M ON/OFF Selecting the radio operating range (the receiver)

24. BAND 80M ON/OFF Selecting the radio operating range (the receiver)

25. BAND 40M ON/OFF Selecting the radio operating range (the receiver)

26. BAND 30M ON/OFF Selecting the radio operating range (the receiver)

27. BAND 20M ON/OFF Selecting the radio operating range (the receiver)

28. BAND 16M ON/OFF Selecting the radio operating range (the receiver)

29. BAND 15M ON/OFF Selecting the radio operating range (the receiver)

30. BAND 12M ON/OFF Selecting the radio operating range (the receiver)

31. BAND 10M ON/OFF Selecting the radio operating range (the receiver)

32. BAND 6M ON/OFF Selecting the radio operating range (the receiver)

33. BAND 4M ON/OFF Selecting the radio operating range (the receiver)

34. LSB MODE ON/OFF The choice of modulation transceiver (receiver)

35. USB MODE ON/OFF The choice of modulation transceiver (receiver)

36. CW MODE ON/OFF The choice of modulation transceiver (receiver)

37. LOW VOLTAGE 4.0V - 14.0V Auto power off, saving the current data.

38. FIRMWARE ID B9AAE1B4 Synthesizer microcontroller ID.

39. UNLOCK CODE 00000000 code entry point for AF SPECTRAL

Additional option for synthesizer.

The function of viewing the spectrum of the received signal is added (0Hz - 3.2KHz).

In the user menu, enable AF SPECTRAL.

Adjustment of the speed of the decay of the spectrogram 0 - 4.

The signal amplitude of not more than 1V is applied to the S-Meter input, through a capacitor

with a capacity of 1uF, also create a displacement of 1.65v at this ADC input by 10k resistors.

All conclusions on the board are signed:

+9-12V - input from the power source (Min 6v. Max. 14v.)

AGC - Output for AGC system control. = 3.3v.

ATT - output to control the attenuator. = 3.3v.

PRE - Output for preamplifier control. = 3.3v.

CW - Output to control CW mode. = 3.3v.

V-m - Voltmeter input (0-30V)

S-m - Input for indicator of received signal level (input from 0 to 3.3v)

PTT - input 0 to switch the synthesizer to the transmit mode (headset PTT button, PTT)

OUT PTT - Output to enable transmit mode.

UART - RX - com port input (UART, CAT)

TX - output com port output (UART, CAT)

To support CAT, you'll need a simple, cheap converter USB - UART TTL FT232RL !!!!!

CAT. The Kenwood protocol (TS-440S, TS-480). Speed 57600, data bits 8, stop bits 1

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