Rohde & Schwarz FSMR series, Начало работы

Страница: 78 / 131

R&S FSMR
The Screen
1166.3363.12 3.5 E-1
Status information
#SMPL
UNCAL
The status information on the lef t side of the diagram hint at irregularity
(e.g. UNCAL)
"#SMPL" indicates that the relation Span / RBW is higher than 125 while
the RMS detector is activated. In this case, a stable signal evaluation is
no longer possible due to an ins ufficient number of A/D c onverter
samples.
⇒ reduce span or increase RBW
"UNCAL" is indicated under the following circumstances:
• correction data are switched off (menu CAL, CAL CORR OFF).
⇒ switch on CAL CORR ON or PRESET
• no valid correction data. T his may occur after a c old start of the
instrument following a firmware update.
⇒ record correction data
• Sweep time too s hort for current instrument settings (span,
resolution bandwidth, video bandwidth).
⇒ increase sweep time
OVLD / IFOVL
LOUNL /
EXREF
OVEN
OVLD is indicated when the input mixer is overloaded.
⇒ Increase input attenuation
IFOVL is indicated when overload occurs in the IF signal path after the
input mixer.
⇒ Increase reference level
LOUNL is indicated when an error occurs in the frequency processing of
the instrument.
EXREF is indicated when the analy zer is configured for use of an
external reference signal, but no r eference signal is detected at the
corresponding input.
OVEN is indicated when the c rystal oscillator (option R&S FSMR-B4)
has not yet reached its operating temperature. This indication vanishes
after a few minutes after switch on.
Trace info:
Every active measurement curve (trace ≠ BLANK) is allocated trace
information of two or three lines at the left of the diagram. The trace
information has the same colour as the measurement curve.
The information on the currently selected trace is displayed in inverse
video (see TRACE - SELECT TRACE softkey ).