Hello Time-Nuts,
I just become the owner of a Precision Crystal EROS-750- SBR -4 voltage
controlled OCXO. I believe that this is the oscillator that is used in the SRS
SR620 Frequency Counter when it has the 2-ppb option-01 timebase (please
correct me if wrong info). The unit has four terminals simply labled 1-4 on the
bottom as well as the case studs. The label says it is a +15VDC unit. Can
anyone provide the pin-out of this oscillator. Short of an actual pin diagram,
can anyone suggest a way to help identify each pin function, i.e. DC
resistance, AC impedance, safely applying power with series resistance? I do
not want to blow this unit as I have high hopes for it as a replacement
disciplined oscillator in my Trimble Thunderbolt GPS timebase. I will be glad
to share my conversion experience as I proceed with this project. Thanks in
advance for any help.
Don Johnson
True-Cal Services
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