NF FRA51602, Instruction Manual

Page: 209 / 286

5.13 External reference clock
5
-
53
FRA 51602
Even if a valid 10 MHz reference clock signal is being input to the 10 MHz REF IN connector, the
instrument will still operate on the internal reference clock if
【
OSC
】
–
[10 MHz REF]
–
[IN]
is set to
[DISABLE] .
If an external reference clock signal is interrupted, operation automatically switches to the internal
reference clock. If the external reference clock is subsequently restored, operation continues again with
the external reference clock. Whether the instrument is operating on the internal clock or an external
clock is indicated by the status display at the top of the screen.
■ Outputting a 10 MHz reference clock signal
It is possible to output the 10 MHz reference clock signal on which the instrument is operating. For the
specifications and points of caution, refer to "
■ 10 MHz REF OUT
" in " 3.2 Input and output
connectors ".
If
【
OSC
】
–
[10MHz REF]
–
[OUT]
is set to
[ENABLE]
, the 10 MHz reference clock signal will be output
from the 10MHz REF OUT connector on the rear panel of the instrument. If the value is set to
[DISABLE] , the signal is not output.
10 MHz