RF Signal Configuration
R&S
®
SMA100B
63User Manual 1178.3834.02 ─ 05
● On the front panel, press the [Freq] or the [Level] key.
Current frequency and level values are indicated in the "Status bar" so that you can
see them at a glance. Values displayed in the status bar and in the "Frequency/Level"
dialogs can deviate from each other.
See "RF frequency and level display with a downstream instrument" on page 63.
RF frequency and level display with a downstream instrument
If your test setup includes a downstream instrument, you can enter the parameter of
the downstream instrument in the frequency or level settings dialog of the
R&S SMA100B. Examples of downstream instruments are mixers, frequency multipli-
ers, amplifiers or attenuators and of their corresponding major parameters offset, multi-
plier, amplitude. The R&S SMA100B generates the signal without the downstream
parameters, but considers all additional parameters concerning the frequency and
level.
Example parameters that affect the frequency and level:
●
Frequency offset
●
Multiplication factor
●
User correction
Any of these cases are indicated by a dedicated icon, displayed in the "Frequency" or
"Level" tile, depending on the affected parameter.
Figure 3-1 illustrates the calculation of the "Frequency" and "Level" values, displayed
in the status bar.
Figure 3-1: Frequency and Level display vs frequency and level at the RF output
f
RF
, Level
RF
= Frequency and level ("Status bar > Frequency and Level") at the output of the downstream
instrument, see also Calculation of f
RF
and Level
RF
)
f
RF Out
, Level
RF
Out
= Frequency and level at the output connector [RF] ("RF > RF Frequency > Frequency" and
"RF > RF Level > Amplitude")
n*f = Multiplication factor ("RF > RF Frequency > Multiplier")
Δf = Frequency offset ("RF > RF Frequency > Offset")
ΔLevel = Power offset ("RF > RF Level > Offset")
Calculation of f
RF
and Level
RF
●
f
RF
=n*f
RF Out
+ Δf
●
Level
RF
= Level
RF Out
+ ΔLevel
How to Set the Frequency and Level
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