The KH5406 is a non-contact type pi-network measurement system for measuring the resonant frequency
and relative resistance of quartz blanks.
The built-in KH1120 / KH1240 / KH1200 Pi-network Crystal Measurement System gives excellent measurement accuracy and repeatability over other oscillator type blank sorters. Frequency range is 1MHz to 250MHz. Testing specifications include resonant frequency, relative resistance and spurious scan.
The distance between the electrodes and the quartz blank determines the load capacitance of the blank and therefore determines the resonant frequency. Traditional blank sorters adjust the height of the upper electrode with a micrometer. That method gives an indirect relationship between height and frequency, and gives problems of correlating measurement results with other systems.
With KH5406 the Electrode capacitance** can be measured and adjusted such that repeatabilities of frequency measurement for different production batches are excellent. Therefore giving direct relationship between electrode capacitance and resonant frequency.
Calibration procedures are extremely simple that standard " open " , " short " and "l oad " calibration for
pi-network measurement systems are used.
** Electrode capacitance is the equivalent capacitance of the air gap between the quartz blank and the electrodes.
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