0~55MHz DDS Generator Direct Digital Synthesis for HAM Radio VFO Wireless
brand new and
Features:
This is a 0~55MHz DDS Generator. It is based on AD9850 chip and is very easy to operate.
Supports 0~55MHz continual adjust at 1Hz step.
This generator has 78L05 regulate. Input current at 200MA, input 8-9V would be the for
Input of 12V can only be used for short for time testing, otherwise will cause heat to board.
5p/6p to as per photo. 7p of the middle connects to digital for input. 14p (8V GND) is 8V power supply from main board. If powered by main board, DDS does not need independent power supply.
1~6 correspond to 6 frequency bands: (3.8,7 ,9,14,18 or 21,27 or 29)
ISB, USB, CW are the three choices.
is from main board.Keys & Connection interfaces:
ENC:VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A.
SSB: Working change: circulate from USB, LSB, CW, and on and on...
RIT: fine tuning to receiving frequencyKB-1 and KB-2 have common shared pin, but is not GND.

How to operate:
Press power on, then we enter setting screen. Let go/release
A: ENABLE 6XREFCLE: setting chip clock adjust frequency encoding setting. AD9851 set to 6-multiply frequency, AD9850 set to 1multiply frequency. Press then quickly release to enter next step B.
B: DDS-SYSTEM-CLK: Chip working frequency setting. Use to adjust value. Operate in accordance with STEP for key. AD9851 set at oscillator 6-multiply channel, AD9850 set at actual output of oscillator. Press then quickly release to enter step C.
C: MIN_RX_DDS_FREQ:Setting minimum working frequency. Use to adjust value and in accordance with STEP for key. Press then quickly release to enter step D.
D: MAX_RX_DDS_FREQ:Setting working frequency. Use to adjust value and in accordance with STEP for key. (Smaller than 60MHz would be OK Press then quickly release to enter step E.
E: SSB_OFFSET:Fine tuning for SSB working Use to adjust value and in accordance with STEP for key. Press then quickly release to enter step F.
F: CW_OFFSET:Fine tuning for CW working Use to adjust value and in accordance with STEP for key. Press then quickly release to enter stepH: MULTIPLIER: multiply setting for frequency. Should be set as 1, press then quickly release to enter step I:
I: Screen displayes word \"SAVE\", automatically save the above setting, and returns to normal working.Specifications:
Display: 1602 LCD
Input
Input current: 200mA
Frequency
6 bands: 3.8,7,9,14,18 or 21,27 or 29
Material: Metal and Plastic
Size: approx.82x45mm/3.23x1.77in
Color: As pictures shown
Quantity: 1 PcNote:
No retail package.
Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you offer.
Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!Package Includes:
1 DDS Generator Digital Module (other accessories in the picture is not included.)