$229.95 Buy It Now or Best Offer
free,30-Day Returns

Seller Store gra_and_afch
(566) 100%,

Location: Dnipro
Ships to: US,
Item: 185575728436

Return shipping will be paid by:Seller
All returns accepted:Returns Accepted
Item must be returned within:30 Days
Refund will be given as:Money back or replacement (buyer’s choice)
AD9912:AD9912
Country/Region of Manufacture:Ukraine
Custom Bundle:No
Type:Ham Radio Transmitter
Color:Blue
Year Manufactured:2022
MPN:AD9912
Power:12V
GRA & AFCH:GRA & AFCH

DDS AD9912 Arduino Shield Signal Generatorsine wave 600Mhz @ 1.3 GSPS Low Spurs Low Harmonicup to sine wave output 600Mhz @1.3GSPS overclockAttention active cooling recommendedWe provide FREE WORLDWIDE Economy shipping UPS Expedited delivery 3-5 days recommended DDS AD9912 Arduino Shield RF Signal Generator DDS (Direct Digital Synthesis) Analog Devices AD9912 Arduino Shield by GRA & AFCHEasy connection to Arduino MEGA 2560 without additional wires and convertersAll functions of the DDS AD9912 are brought to the contacts of the Arduino MEGAWith this you can fully reveal all the capabilities of the DDS AD9912 ShieldOpensource Software available on our GitHub repository:github/afch/DDS-AD9912-Arduino-Shield RF Signal Generator DDS AD9912 Arduino Shield Listing includes:AD9912 DDS Shield with OLED DisplayClock Chip (TCXO 1ppm) DDS AD9912 RF Unit support control from PC via Serial Port Commands We recommend Ultra Low Noise Reference Oscillator for AD9912 Shield:RCLN1000 1GHz Ultra Low Noise Reference Oscillator for DDS AD9910 AD9912 Units https://www.ebay.com/itm/185938223226 We recommend to use RF Amplifier and Low Pass Filter with our DDS Shield Boards:RF Amplifier LNA 8-2000 MHz, GAIN = 20 dB, P = +20 dBm + LDO MMIC MRFA89 SOT-89 https://www.ebay.com/itm/164586150463 (Low-Pass Filter LPF 7th Order Elliptical 1-1000Mhz 3.5 7 14 28 144 433MHz etc.) https://www.ebay.com/itm/164902154239 Dear customers!If you have ANY questions, (PLEASE ASK us). Short description: Easy to connect OLED displayOne encoder for control via the program menuThe synthesizer is capable to generate sine wave, CMOS and HSTL signalsThe software allows you to select and configure the frequency of the clock generator through the user menu (without the need to recompile the program)Any settings can be stored in non-volatile EEPROM memory (located at Arduino Mega)Basic settings are applied and saved automaticallyThis Shield Board support overclocking of the AD9912 core up to 1.3 GHz (heatsink is recommended)DDS AD9912 Shield has ability to generate a signal of up to 600 MHz with a core overclocking up to 1.3 GHz (to suppress harmonics it is recommended to overclock the AD9912 for frequencies above 400 MHz) Key Benefits: Low harmonics no more than -60dBc. An output RF transformer is used for the correct operation of the current mirrorThe AD9912 built-in 50 Ohm resistors achieve better noise and harmonic results than the AD9910Small spurs4 layer Board. Signal lines – TOP and Bottom, Inner layers – Ground and PowerLow Noise LDO StabilizersSeparate power supply for all analog and digital lines (1.8V and 3.3V), 7 pcs IC voltage stabilizers are used. Additionally there is an RF Ferrite boad interchangeHigh speed decoupling Level converter and TTL 5V matchingRF Unit supports control from PC via Serial Port Commands. List of Commands presented belowAdditional balancing transformer used for TCXO and EGEN optionsStandard Mode: up to 400 MHz sine wave output, 1 GSPS internal or external clock speedOverclocking Mode: up to 600 MHz sine wave output, up to 1.3 GSPS internal or external clock speedDifferential HSTL Output up to 1 GHzCMOS Output to up to 200 MHzOutput Filter LPF 9-orderSpur Killer* 2 channels to suppress spurs in the frequency spectrum* (not yet implemented)Integrated 14 bit DAC 48 bit frequency tuning word with 4 μHz resolution 0.000004Hz (optional) Specifications: Frequency:100 kHz – 450 MHz (600 MHz*) 1 Hz stepSpurs max:-60 dBcFrequency step:1 HzOutput power:+4 dBm to -7 dBm (on 50 Ohm load)Output level up to:1 Vpeak-to-peak (at +4 dBm)Power Supply:USB or External Power Supply 7.5V DC 1AOutput filter (LPF):9th order (Cut 600 MHz)CMOS Outputup to 200 MHz, Level 1.8/3.3VHSTL Outputup to 750 MHz (1000 MHz*)Reference clock sources (optional):XO-Crystal Oscillator, TCXO 1ppm, External Oscillator up to 1.3 GHzPCB Size:53.26 x 102 mm* when overclocking the core to 1.3 GHz Serial Port Commands: List of Serial Port Commands:Starting with version 1.02, the ability to control via the serial port has been added.F – Set Frequency in Hz (100000 – 500000000)H – Set HSTL Output: 0 – OFF, 1 – ON, 2 – Doubler ONC – Set CMOS Output: 0 – OFF, 1 – OND – Set CMOS Divider (1 – 65353)P – Set Output Power in dBm (-7 – +4)M – Get Model E – Enable Outputs (ALL)S – Shut down Outputs (ALL)V – Get Firmware Versionh – Help; – Commands SeparatorExample:F100000;P-2Set Frequency to 100 kHz, and Output Power to -2 dBm.Any number of commands in any order is allowed. Serial Port Settings:Speed – 115200 BoudsData Bits – 8Stop Bits – 1Parity – NoDTR – OFF Windows:An example of setting up a serial port in the Windows console:mode COM3 baud=115200 DTR=OFF Data=8Usage example:echo F100000000 > COM3 Ubuntu 22.04:An example of setting up a serial port in the Ubuntu:sudo usermod -aG dialout $USER_NAME$sudo chmod a+rw /dev/ttyUSB0sudo stty -F /dev/ttyUSB0 115200 cs8 ixoff -hupcl -echoUsage example:echo “F100000000” > /dev/ttyUSB0 Dear customers!If you have ANY questions, (PLEASE ASK us). Types of possible reference oscillators (choose one of them in the selector): XO – Crystal 25 MHz 20 ppm internal oscillator with PLL at 1 GHzTCXO – 10 MHz 1 ppm external oscillator PLL at 1 GHzEGEN – external generator up to 1 GHz (to connect an external clock source of up to 1.3 GHz, the source itself is NOT INCLUDED) Phase Noise This parameter is very important and interesting for those who buy and want to use DDS Shield Board.Since the internal phase noise of DDS is obviously less than that of PLL generators, the final value are highly dependent on the clock source.In order to achieve the values stated in the datasheet on AD9912, when designing our DDS AD9912 Arduino Shield, we strictly adhered to all recommendations from Analog Devices:PCB layout in 4 layers, 8 low noise voltage regulators for all power lines (3.3 V digital, 3.3 V analog, 1.8 V digital, and 1.8 V analog and etc.).We measured the phase noise of our DDS AD9912 with the Anritsu MS2781B and found that the phase noise is below the instrument’s measurement capability(shown as a red line on the graph). Therefore, when buying our DDS AD9912 Arduino Shield you can focus on the data from the datasheet on the AD9912. Figure below shows measured by Anritsu MS2781B the noise level when using the built-in PLL in DDS. The PLL multiplies the frequency of a 40 MHz generator by 26 times And another figure below (from Analog Devices AD9912 Datasheet Rev. F) shows the noise level when using an external reference clock 1 GHZ with the PLL OFF Conclusion: when using external clocking you can get much lower phase noise than using the built-in PLL.But do not forget that in order to achieve such results increased requirements are put forward to the external generator OLED Display Menus: DDS AD9912 Core Clock Menu DDS AD9912 Sweep Menu DDS AD9912 Main Screen APPLICATIONS: Oscillator Ultra Low jitter Fout=50MHz -160dBc @ 10khz, Fout=400MHz -138dBc @ 10khz (external reference clock)Local oscillator (LO) for HAM RadioReceiver/Transmitter communicationsAgile local oscillator (LO) frequency synthesisFor teaching students at Universities and InstitutesSecure communicationsTest and measurement equipment Dear customers!If you have ANY questions, (PLEASE ASK us). DDS AD9912 Arduino Shield Spectrograms:GRA & AFCH DDS AD9912 Spectrograms: GRA & AFCH DDS AD9912 Shield Oscillograms: DDS AD9912 Arduino Shield Thermal images: AD9912 Board temperature measured with Flir E8 thermal imager at Core Clock @ 1040 MHz Powered from USB Arduino MEGA to Shield AD9912 Pinout Scheme: DDS Arduino Shield AD9912 RF Signal Generator overview: Full Overview of AD9912 Shield Board available on our YouTube channel: « GRA & AFCH » DDS Arduino Shield AD9912 RF Signal Generator by GRA & AFCH: Dear customers!If you have ANY questions, (PLEASE ASK us). Shipping and Return information All Items are shipped from UkraineVia International registered AirmailShipments are made within 1 business dayAfter the payments are received and verifiedIt takes about 4-7 days via UPS Express deliveryIt takes about 10-18 days via Standard shippingIt takes about 35-45 days via Economy shippingWe combine multiple Items to save on shipping UPS Express Shipping time (recommended):Europe:3-5 daysGermany:3-5 daysUSA, Canada:4-7 daysAsia, South America:5-7 daysAustralia, New Zealand:5-7 daysAfrica, Central America:5-7 days Standard Shipping time:Europe:10-12 daysGermany:10-12 daysUSA, Canada:10-15 daysAsia, South America:10-18 daysAustralia, New Zealand:12-18 daysAfrica, Central America:12-18 days Economy Shipping time:Europe:25-30 daysGermany:25-30 daysUSA, Canada:30-35 daysAsia, South America:35-45 daysAustralia, New Zealand:45-55 daysAfrica, Central America:45-55 days Return PolicyAll Returns are acceptedFor Return you should contact Us within 14 Days after receiving the ItemRefunds are made as Money back or Replacements (buyer’s choice)Return Shipments are paid by the buyerNo restocking fees are charged Dear customers!If you have ANY questions, (PLEASE ASK us).

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