Spin echo generator board (in progress)

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PCB schematic and layout here:


Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse for 90 and 180 deg pulses (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and TR.

The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.

Top of PCB with digital IC's.
Bottom of PCB with RF components and potentiometers to set pulse duration and duty cycle.