Rohde & Schwarz SMC100A - Reference Oscillator

Instrument Function
R&S
®
SMC100A
126Operating Manual 1411.4060.32 ─ 09
5.3.4 Reference Oscillator
The R&S SMC is equipped with an internal reference oscillator that generates a refer-
ence frequency of 10 MHz. It is used as internal reference source for the synthesizer
and the local oscillator. Alternatively, you can apply an external reference signal.
Regardless of the used reference source (internal or external), the R&S SMC always
provides the configured reference frequency at the output. You can use it, for example
to synchronize several interconnected instruments.
The settings of the reference oscillator are not affected by an instrument preset ("PRE-
SET" key).
The following examples briefly explain the possible test setups and the settings to be
considered.
●
Internal f
ref
= 10 MHz (10 MHz REF OUT)
Figure 5-1: Synchronizing a subsequent instrument using the internal 10 MHz reference signal of
the R&S SMC
The internal reference oscillator supplies the reference frequency.
Settings:
– Source: "Internal"
●
External f
ref
= 10 MHz (10 MHz REF OUT)
If you have a clean external reference signal with 10 MHz frequency, you can
directly pass it to the output. The signal quality remains the same.
Figure 5-2: Synchronizing instruments by means of an externally applied reference signal having
10 MHz
RF Block