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Setting mode (continued)
Preheating setting
PrHEAT>***
Use to turn ON/OFF preheating when the unit is off.
OFF
The POWER button turns the rubidium oscillator on/off with the
unit.
ON
This turns the power for the rubidium oscillator on regardless of
the POWER button setting. This shortens the amount of time until
the oscillator stabilizes after the unit is turned on.
o Due to the nature of the rubidium oscillator, continuous operation
stabilizes the precision of operation, so we recommend turning
this ON.
o When the unit power is off, clock is not output even though the
rubidium oscillator is operating.
o If the rubidium oscillator is always on, the unit will consume con-
siderably more power when the unit is off.
Reference clock setting
Rb>***
INT
The built-in rubidium unit is used for the reference clock.
+1pps
Use this mode when a GPS 1pps signal is input through the ref-
erence frequency input (EXT IN) connector to operate with the
built-in rubidium unit synchronized to the GPS.
o Synchronization of the rubidium unit with a 1pps signal takes
about ten minutes.
While synchronizing, the LOCK indicator blinks and "1ppsLCK-
ING" appears on the display.
+10MHz
Use this mode when inputting the 10MHz output from a GPS
receiver to the reference frequency input (EXT IN) connector. (Use
when the GPS receiver does not have a 1pps output.) This unit
will internally generate a 1pps signal and operate with the built-in
rubidium unit synchronized to the GPS.
o When using +1pps or +10MHz mode, since synchronizing with
the built-in rubidium oscillator takes a very long time, we strongly
recommend setting PrHEAT (preheating) to ON.
18
10MHz OUT connector 1 output setting
10M_1>***
Use to set the output for the 10MHz OUT 1 connector.
ON
This enables it.
OFF
This disables it.
10MHz OUT connector 2 output setting
10M_2>***
Use to set the output for the 10MHz OUT 2 connector.
ON
This enables it.
OFF
This disables it.
10MHz OUT connector 3 output setting
10M_3>***
Use to set the output for the 10MHz OUT 3 connector.
ON
This enables it.
OFF
This disables it.
10MHz OUT connector 4 output setting
10M_4>***
Use to set the output for the 10MHz OUT 4 connector.
ON
This enables it.
OFF
This disables it.
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