The BNC sockets on the rear panel labeled REF IN, REF OUT 1 and REF OUT2 are used for synchronization of the CMU with external devices.
![]() |
REF IN | This input is used to synchronize the CMU to other instruments.
The frequency of the external reference signal fed in at REF IN must be
set in the Sync. tab of the Connection Control menu or via
the CONFigure:SYNChronize:FREQuency:REFerence
command. |
REF OUT 1 | A signal for synchronization of other instruments is available
at this output connector. This signal is either the reference frequency
of the CMU or the signal applied to the input REF IN (see Sync.
tab of the Connection Control
menu).
| |
REF OUT 2 | A clock signal applied to this output and can be used for synchronizing external devices. The clock frequency can be selected from a list of network-specific frequencies in the Sync. tab of the Connection Control menu. |
Inputs and outputs for reference frequency