DDS Signal Generator AD9850 6 Bands 0~55MHz Digital Shortwave Radio

DDS Signal Generator AD9850 6 Bands 0~55MHz Digital Shortwave Radio

Name: DDS Signal Generator AD9850 6 Bands 0~55MHz Digital Shortwave Radio
Brand: Elecbee
SKU: EB0047353
Price: 49.99 USD
Availability: InStock
Rating: 141 / 29 (29 reviews)

$49.99

SKU: EB0047353

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DDS Signal Generator AD9850 6 Bands 0~55MHz Digital Shortwave Radio

EB0047353

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Description

This is a 0~55MHz DDS Signal 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 voltage regulate. Input current at 200MA, input voltage 8-9V would be the ideal voltage.
Input voltage of 12V can only be used for short time testing, otherwise will cause heat to board.
5p/6p connect to encoder as per photo. 7p of the middle connects to digital matrix 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 mode choices.
DT is signal from main board.

Keys & Connection interfaces:

ENC: Encoder switch
MEM: Switch for memory mode
VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A.
SSB: Working mode change: circulate from USB, LSB, AM, CW, and on and on...
RIT: Fine tuning to receiving frequency
CAL: Set functions
KB-1 and KB-2 have common shared pin, but is not GND

How to operate:

Press CAL, power on, then we enter setting screen. Let go/release CAL.
A: ENABLE 6XREFCLE: setting chip clock mode, adjust frequency encoding setting. AD9851 set to 6-multiply frequency, AD9850 set to 1multiply frequency. Press CAL then quickly release to enter next step B.
B: DDS-SYSTEM-CLK: Chip working frequency setting. Use encoder switch to adjust value. Operate in accordance with STEP key. AD9851 set at oscillator 6-multiply channel, AD9850 set at actual output of oscillator. Press CAL then quickly release to enter step C.
C: MIN_RX_DDS_FREQ: Setting minimum working frequency. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step D.
D: MAX_RX_DDS_FREQ: Setting maximum working frequency. Use encoder switch to adjust value and in accordance with STEP key. (Smaller than 60MHz would be OK ). Press CAL then quickly release to enter step E.
E: SSB_OFFSET: Fine tuning for SSB working mode. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step F.
F: CW_OFFSET: Fine tuning for CW working mode. Use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step G.
G: OFFSET_FREQ: Setting of offset Frequency. e.g, set to 9MHz or 10.7MHz, use encoder switch to adjust value and in accordance with STEP key. Press CAL then quickly release to enter step H.
H: MULTIPLIER: multiply setting for frequency. Should be set as 1, press CAL then quickly release to enter step I:
I: Screen displayes word "SAVE", automatically save the above setting, and returns to normal working.

Notes:

1. DDS SYSTEM CLK: can use frequency tester to get 30MHz oscillator, multiply the tested value at 6, then put the multiplied value here. If using AD9851, make initial setting at 180000000.
2. OFFSET FREQ: can be set as + or - . Rotate encoder switch to change value, press STEP key, then rotate encoder switch to adjust step. Minimum working frequency plus (+) offset frequency should be high than 0 (zero).

Frequency display:

RX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ)
TX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ + TX_OFFSET_FREQ)
The frequency programmed into the DDS, is calculated as shown below.
RX = ABS(RX_DDS_FREQ)
TX = ABS(RX_DDS_FREQ + TX_OFFSET_FREQ)
RX_DDS_FREQ, MIN_RX_DDS_FREQ, MAX_RX_DDS_FREQ, TX_OFFSET_FREQ & OFFSET_FREQ

1 x DDS Signal Generator

Reviews (29)
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Q & A

: Where is the origin of Elecbee products? Are they certificated?

2023-03-03

Answer:

Elecbee has long-term cooperation agreements with the OEM factories in China. So that we are able to reduce the intermediate channel cost, and help you save money. Our products are all made strictly according to the relative global standard, to ensure the products have good compatibility and excellent quality.

2023-03-03

: What forms of payment do you accept?

2023-03-03

Answer:

Our main payment methods include Paypal, Credit Cards, Debit Cards, Bank Transfer, and more to discover. Please choose the payment methods in your favor.

2023-03-03

: When will you arrange shipment?

2023-03-03

Answer:

After confirming receipt of your payment. We will arrange the delivery as soon as possible and upload the courier number to the website for you to track.

2023-03-03

: How to exchange or return?

2023-03-03

Answer:

1. You can apply to return within 30 days after receipt of the goods. Please make sure the outside package is intact, and the product is in its original condition. We will arrange your refund according to the relevant provisions once the package is received.

2. Return process: You Apply for a Return - Approve the Return - Arrange a Return - Receive the Products and make Inspection - We arrange a Refund;

3. We will bear the freight charges for returns caused by us, for instance, the quality problem. As to returns caused by the buyer, the buyer should be responsible for the shipping fee.

2023-03-03