* when overclocking the core to 1.3 GHz
Dear customers! If you have ANY questions, (PLEASE ASK us) Phase Noise:This parameter is very important and interesting for those who buy and want to use DDS Shield Board. 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.). Figure below shows the phase noise level when using the built-in PLL in DDS. The PLL multiplies the frequency of the on-board 50 MHz TCXO generator by a factor of 20. Figure below shows the phase noise level of DDS9912 when using an external reference clock frequency of 1 GHz (RCLN1000), with the PLL OFF. Let’s compare these two graphs, for example, at a 10 kHz offset from the carrier: For the same output frequency, but at a 1 MHz offset from the carrier, with the internal PLL system engaged, Conclusion: We recommend Ultra Low Noise Reference Oscillator for AD9912 Shield:
If you need higher power output:The simplest method to increase the power is connecting an external RF signal Amplifier, such as the MMIC MRFA89. IMPORTANT: Since the MMIC MRFA89 Amplifier has maximum output power of +20 dBm and gain of 20 dB, the recommended maximum input signal level is 0 dBm. NOTE: as most amplifiers generate harmonics, it is advised to connect an LPF Filter to the Amplifier output for harmonic suppression. We recommend to use RF Amplifier and Low Pass Filter with our DDS Shield Boards:
OLED Display Menus:
Remote control of DDS Generator | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DDS Arduino Shield AD9912 RF Signal Generator by GRA & AFCH: | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
DDS AD9912 Shield Board Operating Instruction Operating Instruction for DDS AD9912 Shield Board v1.x (rev.B) with Connection DiagramDDS AD9912 Shield Board v1.x Operating Instruction (rev.B) with Connection Diagram [title]
DDS AD9912 Shield Board v1.x Operating Instruction (rev.B) with Connection Diagram [page 1]
DDS AD9912 Shield Board v1.x Operating Instruction (rev.B) with Connection Diagram [page 2]
DDS AD9912 Shield Board v1.x Operating Instruction (rev.B) with Connection Diagram [page 3]
DDS AD9912 Shield Board v1.x Operating Instruction (rev.B) with Connection Diagram [connection diagram] Dear customers! If you have ANY questions, (PLEASE ASK us).
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