Instrument Function
R&S
®
SMU200A
441Operating Manual 1007.9845.32 ─ 15
"OFL = Over-
flow"
The external sample rate frequency is too high which causes an overflow
in signal transmission.
"URUN =
Underrun"
The external sample rate frequency is too low which causes an underrun
in signal transmission.
SCPI command:
[:SOURce<hw>]:BBIN:SRATe:FIFO[:STATus] on page 697
Baseband Input Level
The crest factor and the peak power of the external baseband signal are entered in the
section "Baseband Input Level". These values are necessary for a correct internal signal
processing in the R&S Signal Generator. They can also be automatically estimated by a
measurement using the "Auto Level Set" button.
Measurement Period
Sets the recording duration for measuring the baseband input signal by
"Auto Level Set". For accurate level measurements, the measurement period should be
set to a time value that is long enough to capture several periods of the input signal.
SCPI command:
[:SOURce<hw>]:BBIN:MPERiod on page 693
Auto Level Set
Starts measuring the input signal. The measurement estimates the crest factor, the peak
power and rms power. The estimated values are automatically entered into the input fields
"Crest Factor", "PEP" and "Level". Using these estimated values the internal gain control
adjusts the input signal gain to achieve an optimal dynamic range.
SCPI command:
[:SOURce]:BBIN:ALEVel:EXECute on page 691
Crest Factor
Sets the crest factor of the external analog or digital baseband signal.Indicates the crest
factor acquired with "Auto Level Set".
SCPI command:
[:SOURce]:BBIN:CFACtor on page 691
PEP
Enters the peak level of the external analog or digital baseband signal relative to full scale
of 0.5 V (in terms of dB full scale).
External Baseband Signal - Baseband Input
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