Crystal oscillator 15pF load

[CommanderLake]

How can one verify a crystal oscillator has a 15pF load if any kind of testing equipment such as a scope probe adds capacitance to it, it seems impossible to verify the waveform without modifying it?

 

[bertus]

Hello,

What schematic do you use?
For what application is the oscillator?

Bertus

 

[CommanderLake]

I have a Connor-Winfield OH4610LF-024.576M
Its not a question relating to any particular application, the datasheet says 15pF nominal load so hypothetically how does one verify such a small load if a scope probe tip is 15pF?

 

[bertus]

Hello,

With the 15 pF load, you probably mean the test circuit in the datasheet:


The load is only there to show the driver capability.
Measuring the output to show the rise and fall times of the signal.

Bertus

 

[CommanderLake]

Page 3, parameter Load: 15pF nominal.
How is it possible for one to validate such a small load?

 

[majoco]

IMHO the load affects the waveform - 50ohms load makes the output into s a sine wave, 15pF might preserve a square wave shape.
As in most things - one test is worth a thousand opinions.