The complete DDS VFO Kit uses a number of components to produce a basic PIC Micro controller and DDS VFO that can be used as an accurate signal generator, or as a basic VFO for a RX or TX project. There is also the option to select software for a simple Sweep generator, and RF power meter option using the RF Power Head Kits. This Kit is suitable for those that have had some experience with SMD components.

The maximum frequency that can be used is 70MHz as this is a third of the maximum DDS clock frequency for the AD9851 chip. A rotary encoder and 4x4 keypad are used as the interface for various functions.  The software allows for a VFO for RX, and a separate VFO for TX that can have the VFO frequencies offset from the displayed frequency. This is useful for receivers or transmitters with an Intermediate Frequency, I/F. So yes it can be used on a receiver that has an eg 9MHz I/F by setting the RX display offset by 9MHz. A number of memory frequencies are also available for programming.

For more detailed information on how this module Kit can be used, Please refer to the DDS-VFO KIT webpage

For the highest performance and reliability, this Kit uses a Genuine Analogue Devices AD9851BRSZ chip and high quality onboard components direct from suppliers in the USA.

DDS-VFO KIT1 is the Basic Kit that includes the EME170 KIT, EME170 Conn Kit, EME167 KIT1 AD9851, EME188/198 LCD interface KIT, 1x metre ribbon cable. Requires complete construction and soldering of SMD components.

DDS-VFO KIT1S is the DDS-VFO KIT1 but has the AD9851 DDS chip pre-soldered to the board.  Requires complete construction and soldering of SMD components.

DDS-VFO KIT1B is a fully constructed and tested product ready to use.

Software Option: This Kit is available with either the DDS Ver2.3 or Sweep Ver2.0 software pre-programmed in the micro-controller.

The Software, LCD Module, Keypad, and Control Knob are required top be selected to make up the product.  Kits and Built products Do Not include miscellaneous hardware, or enclosures.

To see what is included in the DDS-VFO Kit click here

Specifications
Frequency Range: 1Hz to 70MHz ( AD9851 ) Low frequency limited to 100kHz.
RF Output:
+10dBm ( 10mW ) +/-0.5dB from 1 to 40MHz, -3dB @ 70MHz
Low Pass Filter:
70MHz 5th order elliptic
Spurious Output:
30MHz clock -55dBc, 2nd harmonic -32dBc, 3rd -50dBc
Frequency resolution: 1Hz both display & RF output
Frequency Steps: 1Hz, 10Hz, 100Hz, 1kHz, 10kHz, 100kHz, 1MHz, 10MHz, 100MHz
Display Offset: To suit Zero IF or programmable +/- the IF Frequency
VFO: A/B split, RIT, Repeater
Bands: Not available
Modes: Not available
Outputs: Not available
Inputs: PTT
Micro-controller: Microchip PIC16F648A-20A
Clock: Uses internal clock
Data Interface: Clock, serial data, optional I2C bus
Digital Interface:
Up to 13 inputs / outputs available
Operating Voltage: +12 to 14vdc ( +12vdc @ 140mA )
Board Size: See the specific Kit webpages for board sizes

For more information see the DDS-VFO KIT WEBPAGE

Please refer to the DDS-VFO Block Diagram on how this Kit is used

AD9851 DDS VFO

  • Brand: Mini-Kits
  • Product Code: DDS-VFO KIT
  • Quantity In stock: 4
  • $125.95


Available Options


Related Products

Basic AD9851 DDS VFO
PIC16F648A Controller
500MHz Power Head
7GHz Power Head Kit
DDS Ver2.3 Software
SWEEP Ver2.0 Software