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Prefix to a multimeter to test quartz resonators


2015-12-25 00:00:00

Console to a multimeter to test quartz resonators Many digital multimeters have a measuring function ac frequency. So meter M890F has 2 range "0-2 kHz" and "0-20 kHz." With such a device, you can check availability and the fundamental resonance frequency of the quartz resonator frequency up to 20 MHz. To do this, you need to provide a simple multimeter prefix prefix scheme is shown in Figure 1. STB to a multimeter to test quartz resonators Fig. 1
The main element of the circuit- IC CD4060 , which contains in its body flicker and 14-bit binary counter. Practice shows that the chip is properly operate at frequencies up to 20 MHz, however, the output signal is close to sinusoidal and its level is greatly reduced.
To connect the connector X1 measured quartz resonator frequency from 100 kHz to 20 MHz. By X2 connector must be connected input multimeter switched to frequency measurement. With proper resonator device will show a nonzero value. To determine the frequency of the resonator about readings need to multiply by 1024. That is, for example, if the unit shows 9760 kHz, the resonance frequency of the resonator will be investigated is 9760 x 104 810 MHz.



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