$199.95 Buy It Now or Best Offer
free,30-Day Returns

Seller Store gra_and_afch
(566) 100%,

Location: Dnipro
Ships to: US,
Item: 184603928377

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)
Return policy details:
Number of Channels:1
AD9959:AD9959
Country/Region of Manufacture:Ukraine
Custom Bundle:No
Type:Ham Radio Transmitter
Color:Blue
Year Manufactured:2020
MPN:AD9959
Power:12V
GRA & AFCH:GRA & AFCH

DDS AD9959 Arduino Shield RF Signal Generator4 Synchronized Channels 225MHz @600MHz Core ClockLow spurs Low Harmonics DDS AD9959 Arduino Shield RF Signal Generator DDS (Direct Digital Synthesis) Analog Devices AD9959 Arduino Shield by GRA & AFCHEasy connection to Arduino MEGA 2560 without additional wires and convertersAll functions of the DDS AD9959 are brought to the contacts of the Arduino MEGAWith this you can fully reveal all the capabilities of the DDS AD9959 ShieldOpensource Software available on our GitHub repository: github/afch/DDS-AD9959-Arduino-ShieldVideo review on our YouTube channel: youtube/watch&v=HpigQwjc9mg&feature=youtu.be Listing includes: AD9959 DDS Shield BoardOLED Display (included with the DDS Shield)Clock Source TCXO (included with the DDS Shield) DDS AD9959 RF Unit support control from PC via Serial Port Commands 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/184629327037 Low-Pass Filter LPF 7th Order Elliptical 1-1000Mhz 3.5 7 14 28 144 433MHz etc. https://www.ebay.com/itm/184877243792 AD9959 DDS Shield requires 4 Amplifiers and 4 Low Pass Filters for each channel!!! Key Benefits: Convenient and fast control with an encoder.4 synchronized DDS channels 225MHz @ up to 600 MSPSLow harmonics no more than -60 dBc. An output RF transformer is used for the correct operation of the current mirror.Small spurs.4 layer board. Signal lines TOP and Bottom, inner layers Ground and Power.RF Unit supports control from PC via Serial Port Commands. List of Commands presented belowLow Noise LDO Stabilizers.Separate power supply for all analog and digital lines (1.8V and 3.3V), 5 pcs IC voltage stabilizers are used. Additionally, there is an RF Ferrite bead interchange.High-speed decoupling Level converter and TTL 5V matching. Types of possible reference oscillators (choose one of them in the selector): XO – Crystal 25 MHz 20 ppm internal oscillator with PLL up to 600 MHz.TCXO – 40MHz (Supports 10 – 50 MHz) 1 ppm external oscillator PLL up to 600 MHz.REF CLK IN – external reference clock input, up to 600 MHz. (this source is NOT INCLUDED). Features: At the output of each channel is a transformer to reduce even harmonics.Additionally balancing transformer is used for XO, TCXO and REF CLK IN options.Easy to connect OLED display.Device control with one encoder and one button.The synthesizer is capable to generate sine wave.The 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 automatically.This shield support overclocking the AD9959 core up to 600 MHz.DDS AD9959 Shield has ability to generate a signal up to 225 MHz with a core overclocking up to 600 MHz (to suppress harmonics, it is recommended to overclock the AD9959 for frequencies above 200 MHz). Phase NoiseThis parameter is very important and interesting for those who buy DDS.Since the intrinsic phase noise of DDS is obviously less than that of PLL generators, the final value is highly dependent on the clock source. In order to achieve the values stated in the datasheet on AD9959, when designing our DDS AD9959 Arduino Shield, we strictly adhered to all recommendations from Analog Devices: PCB layout in 4 layers, separate power supply of all 4 power lines (3.3 V digital, 3.3 V analog, 1.8 V digital, and 1.8 V analog). Therefore, when buying our DDS AD9959 Arduino Shield, You can focus on the data from the datasheet on the AD9959.Figure 18 shows the noise level when using the built-in PLL in DDS. The PLL multiplies the frequency of a 25 MHz generator by 20 times. We use a frequency – 40 MHz (x12 Multiplier) or 50 MHz (x10 Multiplier) from TCXO which gives even more stability. And figure 16 shows the noise level when using an external reference clock 500 MHZ, with the PLL off. Comparing these two plots, for example, for Fout = 40.1 MHz and the internal PLL turned on at 10 kHz carrier offset, the phase noise level is -127 dBc @ 10 kHz. And with the PLL off and using external clocking, the phase noise is 155 dBc @ 10kHz. That is, when using an external clock phase noise by 28 dBc better (lower).For the same frequency Fout = 40.1 MHz, and the internal PLL turned on at 1 MHz carrier offset, the phase noise level is -130 dBc @ 1 MHz. And with the PLL off and using external clocking, the phase noise is 160 dBc @ 1 MHz. That is, when using an external clock phase noise by 30 dBc better (lower).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: Main Screen Core Clock Setup Menu Dear Customers!If you have ANY questions, PLEASE ASK US Specifications: Frequency:100 kHz – 225 MHz (@600 MHz Core Clock) in 1 Hz stepSpurs max:-60 dBcFrequency step:1 HzOutput power:-7 dBm to -60 dBm (on 50 Ohm load)Output level up to:0.282 Vpeak-to-peak (at -7 dBm)Power Supply:USB or External Power Supply 5 – 7V DC 1AOutput filter:7-th orderPhase range:0 to 360 Degrees in 0.1 Degree StepReference clock sources (on choice):XO-Crystal Oscillator, TCXO 1ppm Oscillator, or External Oscillator up to 600 MHzSize:53.26 x 102mm Serial Port Commands: List of Serial Port Commands:Starting with version 1.02, the ability to control via the serial port has been added.C — Set the current output Channel: (0 — 3)F — Sets Frequency in Hz (100000 — 225000000)A — Sets the power (Amplitude) level of the selected channel in dBm (-60 — -7)P — Sets the Phase of the selected channel in dBm (0 — 360)M — Gets Model E — Enable Outputs (ALL) D — Disable Outputs (ALL)V — Gets Firmware Versionh — This Help; — Commands SeparatorExample:C0;F100000;A-10Sets the Frequency to 100 kHz, and Output Power (Amplitude) to -10 dBm on Channel 0 (RF OUT0).Any number of commands in any order is allowed, but the very first command must be “C” 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 DDS AD9959 Arduino Shield Spectrograms: GRA & AFCH DDS AD9959 Shield External Clock Source VS Internal Clock Source Comparison:DDS AD9959 100 kHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ DDS AD9959 10 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ DDS AD9959 100 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ DDS AD9959 225 MHz Marconi 2023@600MHz VS TCXO 40 MHz x12@600 MHZ GRA & AFCH DDS AD9959 Shield Oscillogram:DDS AD9959 All 4 Channels Outputs Shifted on 90 Degrees. Arduino MEGA to Shield AD9959 Pinout Scheme: Block Scheme DDS AD9959 V1.1 DDS Arduino Shield AD9959 RF Signal Generator Overview:Please refer to full video Overview of our DDS AD9959 Shield RF Signal Generator on our YouTube channel: ‘GRA & AFCH’ DDS Arduino Shield AD9959 RF Signal Generator: 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 Standerd 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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