Difference between revisions of "Spin echo generator board (in progress)"
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https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip | https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip | ||
| − | Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation pulse, and other delays. | + | Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and other delays. |
| + | |||
| + | The synthesizer input should typically be 10 dBm or higher to drive the mixers properly. | ||
[[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Bottom of PCB with digital IC's.]] | [[File:Spin_echo_board_bottom.JPG|400px|thumb|left|Bottom of PCB with digital IC's.]] | ||
[[File:Spin_echo_board_top.JPG|400px|thumb|left|Top of PCB with RF components and potentiometers to set pulse duration and duty cycle.]] | [[File:Spin_echo_board_top.JPG|400px|thumb|left|Top of PCB with RF components and potentiometers to set pulse duration and duty cycle.]] | ||
Revision as of 22:48, 25 March 2024
PCB layout here:
https://rflab.martinos.org/images/2/2f/Spin_echo_board.zip
Large blue potentiometer sets TE. Smaller potentiometers are used to set the duration of the gating pulse (sent to RFPA), duration of the 90 deg. excitation hard pulse, duration of the 180 deg. refocusing hard pulse, and other delays.
The synthesizer input should typically be 10 dBm or higher to drive the mixers properly.
