Description

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. Input 12V (Seller's Note: We are also providing a simplified version, with input 8~9V) With direct digital input frequency With audio volume potentiometer With amp. gain potentiometer With AGC potentiometer S-LED display Standing Wave-LED display 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: 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. 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 Contents 1x AD9850 AD9851 0-55MHz Synthesis DDS Signal Generator Ham Radio Payment Payment : (1). We accept PayPal only. (2). We only ship the item to your Paypal address for fast and accurate shipment. If you want to change the address, please add a note when you make the payment. after you have paid. (3). If you are paying through Paypal using eCheck, note that your item can be shipped only after eCheck has cleared. (4). All payments are expected within 7 days after the last winning auction is closed. A non-payment dispute will be opened if full payment is not received. (5).After you have won the auction, an email will be sent to your eBay registered email address. Delivery details Under normal circumstances, United States Buyers'package is expected to be delivered within 9 to 15 business days with tracking . other countries are 18 to 21 business days without tracking(If you need a tracking, please pay additional $3.00 USD and send us ebay/paypal message.). All the items will be dispatched within 1 business day after the payment cleared. Items will arrive in 8-25 business days. The arrival time depends on some factors and different areas. Please confirm address in your Paypal account, and leave your telephone number to ensure you can timely receive your items. Terms of sales In order to protect both buyer and seller, we only accept PAYPAL payment. Your immediate payment is appreciated, and we will leave positive feedback to you once the payment is made. Check payments may delay the processing time because we will only send out the goods until it's cleared by Paypal. About us Welcome to our store! We are a professional worldwide wholesale company, with our own factory located in China. We supply many products including video game, Home & Garden, health & beauty, phone accessories, computers accessories, camera & camcorder, car accessories, flash disk & card, MP3,MP4 & MP5, Clothing accessories, games, toys & hobbies, jewelry, antique & craftwork. High product quality, reasonable prices, excellent customer service and a reliable credit standing is our tenet. Please come back soon and visit us again! We are looking forward to establishing cooperative relationships with you. Please contact us for more information. Thank you for shopping with us! Contact us Our products are of high quality, and we offer 365 days warranty for all items. We offers a No-hassle 30 days exchange (replace) only if your parcel is defective due to manufacturing problem. However, as every sale is final, we appreciate your reconsideration for any return. Thank you again for your business. Any returning, pls inform us first and send back with return ID (given by LD customer service).