Leica GPS1200 Series Technical Reference Manual page 551

CONFIGURE
External Oscillator
Config...\Interfaces... - General
Description of fields
Field Option
<Use Device:>
No
TCXO
OCXO
Rubidium
Caesium
CONT (F1)
To accept changes and return to the screen
from where this screen was accessed.
Description
The type of external oscillator to use.
An external oscillator is not been used. All other fields
become unavailable.
To use a temperature compensated crystal oscillator.
To use an oven controlled crystal oscillator.
To use a rubidium based external oscillator.
To use a caesium based external oscillator.
GPS1200 551