Details
Features :
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
Examples:
1. DDS output range 30~40MHz:
MIN_RX_DDS_FREQ MAX_RX_DDS_FREQ OFFSET_FREQ RX Frequency display range.
30 MHZ 40 MHz 100 MHz = 130 MHz to 140 MHz. \ Note 1
30 MHZ 40 MHz -10 MHz = 20 MHz to 30 MHz. /
-40 MHZ -30 MHz 170 MHz = 140 MHz to 130 MHz. \ Note 2
-40 MHZ -30 MHz 60 MHz = 30 MHz to 20 MHz. /
2. setting FT180A with DDS:
ENABLE RPT NO
X6 RECLK X6
DDS SYSTEM CLK 180M
MAX DDS FREQ 65M
MIN RX DDS FREQ 10.701M (Offset frequency + RIT frequency)
MAX RX DDS FREQ 60M
TX OFFSET FREQ 0
MAX RIT OFFSET 1K (RIT frequency)
OFFSET FREQ －10.700M －(Offset frequency)
MULTIPLIER 1
Package：
100% Brand New
1 x 0~55MHz DDS Signal Generator * Direct Digital Synthesis HAM Radio VFO Wireless
The items you ordered will be shipped out in 3 business day when your payment is clear. The arrival time is 5-20 business days to United States usually.
We maintain high standards of excellence and strive for 100% customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us neutralor negative feedback, so that we can satisfactorily address your concerns.
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Do not dismiss your dream.
To be without dream is to be without hope.
To be without hope is to be without purpose.
Do not run through your life so fast that you forget not only where you have been, but also where you are
going.
Life is not race, but a journey to be savored each step of the way.
This is the description of Returns Policy.
Do not dismiss your dream.
To be without dream is to be without hope.
To be without hope is to be without purpose.
Do not run through your life so fast that you forget not only where you have been, but also where you are
going.
Life is not race, but a journey to be savored each step of the way.
Copyright©2017 DataCaciques
Item Description
Features :
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
Examples:
1. DDS output range 30~40MHz:
MIN_RX_DDS_FREQ MAX_RX_DDS_FREQ OFFSET_FREQ RX Frequency display range.
30 MHZ 40 MHz 100 MHz = 130 MHz to 140 MHz. \ Note 1
30 MHZ 40 MHz -10 MHz = 20 MHz to 30 MHz. /
-40 MHZ -30 MHz 170 MHz = 140 MHz to 130 MHz. \ Note 2
-40 MHZ -30 MHz 60 MHz = 30 MHz to 20 MHz. /
2. setting FT180A with DDS:
ENABLE RPT NO
X6 RECLK X6
DDS SYSTEM CLK 180M
MAX DDS FREQ 65M
MIN RX DDS FREQ 10.701M (Offset frequency + RIT frequency)
MAX RX DDS FREQ 60M
TX OFFSET FREQ 0
MAX RIT OFFSET 1K (RIT frequency)
OFFSET FREQ －10.700M －(Offset frequency)
MULTIPLIER 1
Package：
100% Brand New
1 x 0~55MHz DDS Signal Generator * Direct Digital Synthesis HAM Radio VFO Wireless
Payment
1.We only accept payment from PayPal.
2.Please make sure your eBay address is correct before you pay.
3.All payment Should be Completed within 7 days, or an unpaid disputed will be opened as payment none receive.
4.If you do not want to pay for the order please contact us via eBay message, we will help your cancel the transaction.
Shipping
1. We only ship to confirmed PayPal addresses.
2. Economy Shipping, with no tracking number.
Standard Shipping, with tracking number.
Express (Expedited) Shipping, with tracking number.
3. Economy shipping needs 2-5 weeks to arrive mostly.
In rare case, it can take up to 6-8 weeks.
It depends on your location and local postal service, as well as the weather condition along the shipping.
4. If you need a faster delivery time, you could choose
Express (Expedited) Shipping.
If you need a tracking number, you could choose Standard Shipping.
Return
1. We offer 60 day money back or replacement guarantee.
In addition, it allows customers to return new and unused products in their original factory condition for any reason within 60 days from the date of purchase.
2. Although we test each item and they are packed professionally, few item(less than 0.1%) might be damaged during the shipping. Please feel free to contact us within 4 days after you receive your package about replacement.
3. If you don't receive items over 35days ,please make sure to contact us before leaving any neutral or negative feedback.We'll try our best to help you solve the problem.
If we authorized the return, customers will get an email with instructions for returning the item. Email will be replied within 24 hours on Chinese business hours.
The sole and exclusive maximum liability to lifesteward arising from any product sold on lifesteward ebay account shall be the price of the product ordered.
Feeback
1. Customer satisfaction is our top goal. We believe our items are so outstanding. All products are quality checked. They are new and in good condition when shipped to our customers. We are convinced you will be happy with your Purchase.
2. If product is defective or damage upon arrival, or wrong product shipped, please contact us immediately. Returns accepted within 14 days of delivery date and item must be in original new condition, not worn or altered in any way with attached tags & wrap. Otherwise deal is final. Return shipping must be paid by buyer.
3. We appreciate your Postive Feedback, and will do the same in return. DO NOT leave negative feedback without first communication with us. Please allow max 2 business days for us to response.
On Apr 2, 2026 at 20:18:16 PDT, seller added the following information: