Agilent Technologies 4294A Specifications download pdf (Page 95)

2. It is important to properly set the oscillator output level; resonators are test signal dependent.

The minimum impedance value and the series resonant frequency may vary depending on the

applied test signal level. Decrease the test signal level while monitoring the test current (I-mon-

itor function) until the specified test level is obtained.

3. Perform an open/short compensation. Use ALL POINT compensation mode instead of the inter-

polation mode because resonator measurements are narrowband. Also, pay special attention to

the short compensation procedure. Improper short compensation will result in measurement

error for fr and the minimum impedance value.

4. Keep the measurement temperature constant. Resonators are temperature sensitive. Place a

resonator into the test fixture with your hand and wait until the series resonant frequency

becomes constant.

Figure 5-31 (a) and (b) shows the measurement result for a crystal resonator.

Figure 5-29. Typical resonator characteristics

Figure 5-30. Resonator measurement setup

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Agilent Technologies 4294A Specifications Page 95