Rohde & Schwarz R&S SMW200A - Reference Oscillator; Required Options

Configuring the RF Signal
R&S
®
SMW200A
473User Manual 1175.6632.02 ─ 30
The level displayed in the status bar includes "Amplitude", "Offset" and "Digital Attenu-
ation".
"Offset" represents a level value that impacts the RF signal outside the R&S SMW. In
contrast, the "Digital attenuation" directly affects the level value at the RF output.
Further settings that affect the level at the RF output, like user correction, are indicated
by an icon in the status bar.
8.5 Reference Oscillator
The R&S SMW 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.
Alternatively, you can apply an external reference signal. If equipped with the required
options, the R&S SMW can process external reference frequency in the range 1 MHz
to 100 MHz and the 1 GHz reference frequency.
Regardless of the used reference source (internal or external), the R&S SMW always
provides the configured reference frequency at the output. You can use it, for example
to synchronize several interconnected instruments, see Chapter 8.5.5, "Using the Ref-
erence Frequency for Instruments Synchronization", on page 479, for an overview of
typical test situations.
The reference oscillator settings are not affected by an instrument preset ([PRESET]
key or *RST) and the "Save/Recall" function. They are reset only by factory preset.
8.5.1 Required Options
R&S SMW base unit equipped with the following options:
●
100 MHz, 1 GHz ultra low noise reference input and output (R&S SMW-K703)
●
1 MHz to 100 MHz flexible reference input (R&S SMW-K704)
Reference Oscillator