With a very likely correct pinout at hand (see previous post) for the Motorola K1516AE VC-TCXO, it was time to fire it up. The pinout was correct indeed and I got a 10.000 MHz signal.
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| Motorola K1516AE TCXO on a breadboard. |
What I noticed:
- after 60 minutes at 27°C ambient temperature the case does not get sensibly warm
- the voltage control of the oscillator gives about 200 Hz freedom
- Vcc influences the generated frequency
In order to get a well behaved reference oscillator care must be taken to provide a very constant voltage supply and, probably, the desired termination impedance (or at least "constant"). Since I was using the bench power supply and a sub-optimal assembly I will not mention the 1 Hz drift over one hour of operation :)
The thought of building a reference oscillator spins up the need for a very stable source of 12 V (or thereabout as long as it is stable over time). Living on the time-nuts edge...
