Esoteric 156517, Руководство пользователя

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Messages
PLL LCKING
The 10MHz reference clock from the built-in rubidium oscillator is
being locked by the internal PLL circuit.
When locking completes, this message will disappear.
o
Ordinarily, only a few seconds are needed until locking com-
pletes (PLL locking time), but it can take up to a minute
depending on the operating temperature and other factors.
o
If locking cannot be completed because input conditions are
not met when set to +10MHz, the message will continue to be
displayed.
Check the input reference clock.
Rb LOCKING
The output of the rubidium unit is being stabilized (when preheat-
ing or changing the reference clock).
1ppsLCKING
This sometimes appears when the reference clock is set to
+10MHz or +1pps.
This message appears during synchronization with a 1pps signal
that has been converted by this unit from an input 10MHz clock
(+10MHz) or with an input 1pps clock (+1pps).
o
Synchronization sometimes takes a long time.
o
If the input signal precision does not meet the requirements of
this unit, synchronization will not occur even after ten minutes
and “1ppsLCKING” will continue to appear on the display. Check
the input signal precision. If it does not meet the requirements
of this unit, set the reference clock to INT.
NO 10M-IN!
This appears when the reference clock is set to +10MHz and no
10MHz reference clock signal is being input to the reference fre-
quency input (EXT IN) connector.
Check the input reference clock specifications.
When not using an external clock source, set it to INT (page 18).
NO 1ppsIN!
This appears when the reference clock is set to +1pps and no
1pps reference clock signal is being input to the reference fre-
quency input (EXT IN) connector.
Check the input reference clock specifications.
When not using an external clock source, set it to INT (page 18).
Maintenance
Use a soft dry cloth to wipe the surface of the unit clean.
For stubborn smudges, use a damp cloth that has been thoroughly
wrung out to remove excess moisture.
V
For safety, disconnect the power plug from the
outlet before cleaning.
o
Never spray liquid directly on this unit.
o
Do not use chemically-treated wipes, thinner or similar substances
because they could damage the surface of the unit.
o
Avoid allowing rubber or plastic materials to touch the unit for
long periods of time because they could damage the cabinet.