Hardware Interfaces CMU
1100.4903.12 8.12 E-8
Signal Inputs and Outputs
RF Connectors
The N sockets on the front panel labeled RF1, RF 2, RF 3 OUT and RF4 IN are used as inputs and
outputs for RF signals.
RF 2 RF 1
Bidirectional RF connectors
RF4 IN RF 3 OUT
Unidirectional RF connectors
Fig. 8-8 RF connectors
Inputs and Outputs for the Reference Frequency (REF...)
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 REF OUT 1 REF OUT 2
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. index card
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. index card 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. index card of the Connection Control menu.
Fig. 8-9 Inputs and outputs for reference frequency
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