Superheterodyne NMR spectrometer. Hetero means “other” Example: A radio station is transmitting on 300 kHz and the oscillating receiver was set to 400.

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Presentation transcript:

Superheterodyne NMR spectrometer

Hetero means “other” Example: A radio station is transmitting on 300 kHz and the oscillating receiver was set to 400 kHz, the station would be heard not only at the original 300 kHz, but also at 100 kHz and 700 kHz.

Labview controller - YB

probe section

cap and coil selection

coil – large L

impedance matching

Impedance matching – circuit A

isolation – hybrid tee

isolation – quarter waves

RF amplifier stage – miteq fast recovery

receiver section

generator and receiver – side by side

IF (audio) amplifier stage – LM386

DAQ - YB

external Circuits/blob/master/matching-A-min Circuits/blob/master/matching-A-min