{"product_id":"dds-signal-generator-ad9850-6-bands-0-55mhz-digital-shortwave-radio","title":"DDS Signal Generator AD9850 6 Bands 0~55MHz Digital Shortwave Radio","description":"\u003cstrong\u003eFeatures:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e This is a 0~55MHz DDS Signal Generator. It is based on AD9850 chip and is very easy to operate.  \u003cbr\u003e Supports 0~55MHz continual adjust at 1Hz step.  \u003cbr\u003e This generator has 78L05 voltage regulate. Input current at 200MA, input voltage 8-9V would be the ideal voltage.  \u003cbr\u003e Input voltage of 12V can only be used for short time testing, otherwise will cause heat to board.  \u003cbr\u003e 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.  \u003cbr\u003e 1~6 correspond to 6 frequency bands: (3.8, 7, 9, 14, 18 or 21, 27 or 29)  \u003cbr\u003e ISB, USB, CW are the three mode choices.  \u003cbr\u003e DT is signal from main board.  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eKeys \u0026amp; Connection interfaces:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e ENC: Encoder switch  \u003cbr\u003e MEM: Switch for memory mode  \u003cbr\u003e VFO: Transfer from VFO A to VFO B, or from VFO B to VFO A.  \u003cbr\u003e SSB: Working mode change: circulate from USB, LSB, AM, CW, and on and on...  \u003cbr\u003e RIT: Fine tuning to receiving frequency  \u003cbr\u003e CAL: Set functions  \u003cbr\u003e KB-1 and KB-2 have common shared pin, but is not GND  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eHow to operate:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e Press CAL, power on, then we enter setting screen. Let go\/release CAL.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e 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.  \u003cbr\u003e H: MULTIPLIER: multiply setting for frequency. Should be set as 1, press CAL then quickly release to enter step I:  \u003cbr\u003e I: Screen displayes word SAVE, automatically save the above setting, and returns to normal working.  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eNotes:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e 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.  \u003cbr\u003e 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).  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eFrequency display:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e RX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ)  \u003cbr\u003e TX = MULTIPLIER x (RX_DDS_FREQ + OFFSET_FREQ + TX_OFFSET_FREQ)  \u003cbr\u003e The frequency programmed into the DDS, is calculated as shown below.  \u003cbr\u003e RX = ABS(RX_DDS_FREQ)  \u003cbr\u003e TX = ABS(RX_DDS_FREQ + TX_OFFSET_FREQ)  \u003cbr\u003e RX_DDS_FREQ, MIN_RX_DDS_FREQ, MAX_RX_DDS_FREQ, TX_OFFSET_FREQ \u0026amp; OFFSET_FREQ  \u003cbr\u003e   \u003cbr\u003e   \u003cstrong\u003eExamples:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e 1. DDS output range 30~40MHz:  \u003cbr\u003e MIN_RX_DDS_FREQ MAX_RX_DDS_FREQ OFFSET_FREQ RX Frequency display range.  \u003cbr\u003e 30 MHZ 40 MHz 100 MHz = 130 MHz to 140 MHz. Note 1  \u003cbr\u003e 30 MHZ 40 MHz -10 MHz = 20 MHz to 30 MHz. \/  \u003cbr\u003e -40 MHZ -30 MHz 170 MHz = 140 MHz to 130 MHz. Note 2  \u003cbr\u003e -40 MHZ -30 MHz 60 MHz = 30 MHz to 20 MHz. \/  \u003cbr\u003e 2. setting FT180A with DDS:  \u003cbr\u003e ENABLE RPT NO  \u003cbr\u003e X6 RECLK X6  \u003cbr\u003e DDS SYSTEM CLK 180M  \u003cbr\u003e MAX DDS FREQ 65M  \u003cbr\u003e MIN RX DDS FREQ 10.701M (Offset frequency + RIT frequency)  \u003cbr\u003e MAX RX DDS FREQ 60M  \u003cbr\u003e TX OFFSET FREQ 0  \u003cbr\u003e MAX RIT OFFSET 1K (RIT frequency)  \u003cbr\u003e OFFSET FREQ -10.700M - (Offset frequency)  \u003cbr\u003e MULTIPLIER 1  \u003cbr\u003e ??? ?  \u003cbr\u003e   \u003cstrong\u003ePackage includes:\u003c\/strong\u003e  \u003cbr\u003e   \u003cbr\u003e 1 x DDS Signal Generator  \u003cbr\u003e   \u003cbr\u003e     \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/D1\/09\/ddd4754f-f348-4cce-9e58-79e8ddc21c65.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/70\/C2\/4cc1953b-d13b-47bc-a49e-0b2749fb41b6.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/65\/DC\/e695df7d-37d4-4eb7-a070-ad7a05bc8c69.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/E8\/2A\/2f1ff99d-8c5c-4147-bc7d-888906589236.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/D3\/8A\/caaa5ae3-e12d-47d0-9e95-da7744103dbf.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/45\/4A\/2aa9bc6a-4e14-4728-bfa9-15fd2451ddc1.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/8D\/28\/fce44fd5-c8f0-4f6d-814c-07f38b102135.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/15\/5D\/f5530ea2-6b20-4162-8f11-b1b47f67c260.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/62\/90\/5273df95-cdb9-417f-bf3a-89f355ff357c.jpg\"\u003e\u003c\/p\u003e   \u003cp\u003e\u003cimg src=\"https:\/\/imgaz.staticbg.com\/images\/oaupload\/banggood\/images\/4B\/D3\/46359e65-0f83-4a9c-a64a-79ade7e0b52f.jpg\"\u003e\u003c\/p\u003e   \u003cbr\u003e","brand":"ZHIQIAN","offers":[{"title":"Default Title","offer_id":43932617441475,"sku":"ZHIQIAN-024291","price":1199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/4355\/1683\/files\/00ef312e-661a-416a-8ccd-2512e459ec14.jpg?v=1725861265","url":"https:\/\/wrsss.com\/products\/dds-signal-generator-ad9850-6-bands-0-55mhz-digital-shortwave-radio","provider":"Wrsss","version":"1.0","type":"link"}