High frequency head for digital multimeter. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Civil radio communications
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Its schematic diagram is shown in fig. 24. If the high-frequency voltage Ueff (effective value) at the input of the head exceeds 1,5 ... 2 V, then on the scale of the multimeter set to the DC voltage measurement mode and having an input resistance of 1 MΩ in this mode, the Ueff value will be displayed. The upper limit of the measured voltage is limited here only by the reverse voltage Uobr allowed for the diodes of the headі1,5 Ueff The upper frequency limit of the head is at least 30 MHz.
Rice. 24. RF head to the multimeter
Publication: cxem.net
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