Messages
PLL LCKING
The 10 MHz reference clock from the built-in crystal oscillator
(OCXO) or the reference frequency input (EXT IN) connector 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 EXT10M, the message will continue to be
displayed.
Check the input reference clock specifications.
NO 10M-IN!
This appears when the reference clock is set to EXT10M and no
10MHz reference clock signal is being input to the reference fre-
quency input (EXT IN) connector.
Check the input reference clock.
When not using an external clock source, set it to OCXO (page
16).
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.
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