Rohde & Schwarz SMBV100B - Page 301

Configuring the RF Signal
R&S
®
SMBV100B
299User Manual 1178.4460.02 ─ 03
(see "Deriving 10 MHz from the external reference frequency" on page 300)
●
1 GHz reference coupling for phase coherence of the RF signals with reasonable
long-term phase stability
(see "Sharing the 1 GHz reference frequency to obtain phase-coherent signals"
on page 299)
Connectors overview
Use the "Show Connector" function to indicate the connector on the front/real panel:
●
Ref In/Ref Out
●
Ref In/Ref Out 1GHz
Distributing the internal 10 MHz reference signal to further instruments
The internal reference oscillator provides the reference frequency:
●
Internal f
ref
= 10 MHz (10 MHz at connector Ref Out)
●
Source = "Internal"
●
Reference Output/1GHz Reference Output = "10 MHz"
Figure 6-2: Synchronizing instruments using the internal 10 MHz reference signal of the
R&S SMBV100B
Ref In, Ref Out = Connectors
Sharing the 1 GHz reference frequency to obtain phase-coherent signals
Compared to 10 MHz, a 1 GHz reference signal significantly improves the achievable
phase stability between two signal sources. Because the synchronization increases by
a factor of 100, the relative phase fluctuations between the sources can be reduced.
1 GHz at connector Ref In 1GHz and 1 GHz at Ref Out 1GHz
●
External f
Ref
= 1 GHz
●
Source = "External"
●
External Reference Frequency = "1 GHz"
●
1GHz Reference Output = "1 GHz"
Using external reference source
If you have a clean external reference signal with 10 MHz or 100 MHz frequency, for
example, you can directly pass it to the output. The signal quality remains the same.
10 MHz/100 MHz at connector Ref Out and Ref In
●
External f
Ref
= 10 MHz or 100 MHz
●
Source = "External"
Reference Oscillator