Generate 125MHz signal to feed circuit?

[NeoxSys]

Hi everybody, I'm currently working on my research project at my uni and I need to feed a circuit with a 125MHz signal (not higher than 1mVp amplitude). My circuit has a low input impedance at that freq.

The problem is that actually there isn't any signal generator available and I'm in a little hurry to finish this off. I was wondering if there is a simple cheap way to generate this signal from a Crystal or a resonance circuit without wasting too much time. I don't even care if it is a sine or a square, it will have only testing purposes.

Thanks in advance.


EDIT: what I want to do by now is to tune this input LC with the help of a oscilloscope, so I only need a signal band near the 125MHz freq

[cncjerry]

5V supply and a 125Mhz packaged crystal oscillator and Bob's your uncle.  Less than 10 bucks.  There probably is a 3.3V version as well.

[NeoxSys]

5V supply and a 125Mhz packaged crystal oscillator and Bob's your uncle.  Less than 10 bucks.  There probably is a 3.3V version as well.

Something like this?
http://uk.rs-online.com/web/p/crystal-oscillators/6676445/

What is the terminal named OE or /ST ?

[james_s]

All the information you need should be in the datasheet.

OE is typically Output Enable. You will have to tie that pin to ground or Vcc (check the datasheet) to enable the oscillator. It works like a power switch.