| 摘要 |
PURPOSE:To set the frequency, the irradiation power, the gain, etc. of a lock system to optimum values for various samples by reading out and executing continuously setting of the power gain, adjustment of the resolution, and setting of the gain in accordance with a preliminarily stored map table. CONSTITUTION:The DC magnetic field generated by a DC magnet 1 is compensated uniformly by a means 5 to rotate a sample 2 by a means 3. The resonance frequency from a master clock 13 is synthesized by a means 14 and passes a gate 15 and is amplified by a means 16 and is applied to a detecting coil 4 to excite resonance. This resonance signals is amplified by a means 17 and is detected by a means 8 and is amplified again by means 11 and is fed back to a sweep coil 6. These means is called a magnetic field lock loop, and they are connected to a CPU 20 through an interface 9. An A/D converter 19 into which the resonance signal is taken, a D/A converter 12 which generates the sweep signal of magnetic field sweep, a rotative speed detector 8, etc. are connected to the CPU 20 through the interface 9 also. Thus, the frequency, the irradiation power, the gain, etc. of the lock system are set to optimum values continuously. |
