www.elektronik.si

[BorisK]

Ali kdo ve, čemu služi pin "Voltage control" pri OCXO oscilatorjih?

Recimo pri temle:
http://si.farnell.com/micro-crystal/ocxov-av5-10-000/ocxo-dip14-met-10-000mhz/dp/1641058

[s56al]

Popravkom frekvence v majhnem območju okoli nazivne vrednosti. Lahko se izrabi za trimanje ali kakšno bolj napredno funkcijo (npr. PLL regulacija, modulacija,...). Kako in koliko, piše v data-sheetu na linku, ki si ga pripel.

LP, S.

[BorisK]

Hvala za odgovor. Medtem sem prejel tudi obširen odgovor proizvajalca, spodaj sem ga prilepil, če si še kdo želi razširiti obzorje.



Frequency from Quartz Crystal Qscillator like an OCXO is always drifting according time and temperature
Oscillators are utilize as a Slave or a Master

OCXOV-AV5
For the “Slave” application (PLL Loop) the oscillator is part of a system were the frequency is compare with an absolute frequency reference such as a Cesium clock or GPS Synch.

The frequency is continuously corrected by the loop, in this case the external frequency pulling must be sufficient to control the unit for at least 10 years, and sometime it goes up to 20 years
This is to compensate the aging and for some application they will even do the compensation of the external temperature influence.


OCXOV-BR1
This is for “Master” application; in this case the oscillator is the master clock of a system.
Frequency is drifting according time and need to be calibrated over the year.
This is a typical application for “instruments”